source "drivers/gpu/drm/shmobile/Kconfig"
+source "drivers/gpu/drm/sun4i/Kconfig"
+
source "drivers/gpu/drm/omapdrm/Kconfig"
source "drivers/gpu/drm/tilcdc/Kconfig"
-#
+
# Makefile for the drm device driver. This driver provides support for the
# Direct Rendering Infrastructure (DRI) in XFree86 4.1.0 and higher.
obj-$(CONFIG_DRM_RCAR_DU) += rcar-du/
obj-$(CONFIG_DRM_SHMOBILE) +=shmobile/
obj-y += omapdrm/
+obj-$(CONFIG_DRM_SUN4I) += sun4i/
obj-y += tilcdc/
obj-$(CONFIG_DRM_QXL) += qxl/
obj-$(CONFIG_DRM_BOCHS) += bochs/
--- /dev/null
+config DRM_SUN4I
+ tristate "DRM Support for Allwinner A10 Display Engine"
+ depends on DRM && ARM
+ depends on ARCH_SUNXI || COMPILE_TEST
+ select DRM_GEM_CMA_HELPER
+ select DRM_KMS_HELPER
+ select DRM_KMS_CMA_HELPER
+ select DRM_PANEL
+ select REGMAP_MMIO
+ select VIDEOMODE_HELPERS
+ help
+ Choose this option if you have an Allwinner SoC with a
+ Display Engine. If M is selected the module will be called
+ sun4i-drm.
--- /dev/null
+sun4i-drm-y += sun4i_crtc.o
+sun4i-drm-y += sun4i_drv.o
+sun4i-drm-y += sun4i_framebuffer.o
+sun4i-drm-y += sun4i_layer.o
+
+sun4i-tcon-y += sun4i_tcon.o
+sun4i-tcon-y += sun4i_dotclock.o
+
+obj-$(CONFIG_DRM_SUN4I) += sun4i-drm.o sun4i-tcon.o
+obj-$(CONFIG_DRM_SUN4I) += sun4i_backend.o
--- /dev/null
+/*
+ * Copyright (C) 2015 Free Electrons
+ * Copyright (C) 2015 NextThing Co
+ *
+ * Maxime Ripard <maxime.ripard@free-electrons.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ */
+
+#include <drm/drmP.h>
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_crtc.h>
+#include <drm/drm_crtc_helper.h>
+#include <drm/drm_fb_cma_helper.h>
+#include <drm/drm_gem_cma_helper.h>
+#include <drm/drm_plane_helper.h>
+
+#include <linux/component.h>
+#include <linux/reset.h>
+
+#include "sun4i_backend.h"
+#include "sun4i_drv.h"
+
+static u32 sunxi_rgb2yuv_coef[12] = {
+ 0x00000107, 0x00000204, 0x00000064, 0x00000108,
+ 0x00003f69, 0x00003ed6, 0x000001c1, 0x00000808,
+ 0x000001c1, 0x00003e88, 0x00003fb8, 0x00000808
+};
+
+void sun4i_backend_apply_color_correction(struct sun4i_backend *backend)
+{
+ int i;
+
+ DRM_DEBUG_DRIVER("Applying RGB to YUV color correction\n");
+
+ /* Set color correction */
+ regmap_write(backend->regs, SUN4I_BACKEND_OCCTL_REG,
+ SUN4I_BACKEND_OCCTL_ENABLE);
+
+ for (i = 0; i < 12; i++)
+ regmap_write(backend->regs, SUN4I_BACKEND_OCRCOEF_REG(i),
+ sunxi_rgb2yuv_coef[i]);
+}
+EXPORT_SYMBOL(sun4i_backend_apply_color_correction);
+
+void sun4i_backend_disable_color_correction(struct sun4i_backend *backend)
+{
+ DRM_DEBUG_DRIVER("Disabling color correction\n");
+
+ /* Disable color correction */
+ regmap_update_bits(backend->regs, SUN4I_BACKEND_OCCTL_REG,
+ SUN4I_BACKEND_OCCTL_ENABLE, 0);
+}
+EXPORT_SYMBOL(sun4i_backend_disable_color_correction);
+
+void sun4i_backend_commit(struct sun4i_backend *backend)
+{
+ DRM_DEBUG_DRIVER("Committing changes\n");
+
+ regmap_write(backend->regs, SUN4I_BACKEND_REGBUFFCTL_REG,
+ SUN4I_BACKEND_REGBUFFCTL_AUTOLOAD_DIS |
+ SUN4I_BACKEND_REGBUFFCTL_LOADCTL);
+}
+EXPORT_SYMBOL(sun4i_backend_commit);
+
+void sun4i_backend_layer_enable(struct sun4i_backend *backend,
+ int layer, bool enable)
+{
+ u32 val;
+
+ DRM_DEBUG_DRIVER("Enabling layer %d\n", layer);
+
+ if (enable)
+ val = SUN4I_BACKEND_MODCTL_LAY_EN(layer);
+ else
+ val = 0;
+
+ regmap_update_bits(backend->regs, SUN4I_BACKEND_MODCTL_REG,
+ SUN4I_BACKEND_MODCTL_LAY_EN(layer), val);
+}
+EXPORT_SYMBOL(sun4i_backend_layer_enable);
+
+static int sun4i_backend_drm_format_to_layer(u32 format, u32 *mode)
+{
+ switch (format) {
+ case DRM_FORMAT_ARGB8888:
+ *mode = SUN4I_BACKEND_LAY_FBFMT_ARGB8888;
+ break;
+
+ case DRM_FORMAT_XRGB8888:
+ *mode = SUN4I_BACKEND_LAY_FBFMT_XRGB8888;
+ break;
+
+ case DRM_FORMAT_RGB888:
+ *mode = SUN4I_BACKEND_LAY_FBFMT_RGB888;
+ break;
+
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+int sun4i_backend_update_layer_coord(struct sun4i_backend *backend,
+ int layer, struct drm_plane *plane)
+{
+ struct drm_plane_state *state = plane->state;
+ struct drm_framebuffer *fb = state->fb;
+
+ DRM_DEBUG_DRIVER("Updating layer %d\n", layer);
+
+ if (plane->type == DRM_PLANE_TYPE_PRIMARY) {
+ DRM_DEBUG_DRIVER("Primary layer, updating global size W: %u H: %u\n",
+ state->crtc_w, state->crtc_h);
+ regmap_write(backend->regs, SUN4I_BACKEND_DISSIZE_REG,
+ SUN4I_BACKEND_DISSIZE(state->crtc_w,
+ state->crtc_h));
+ }
+
+ /* Set the line width */
+ DRM_DEBUG_DRIVER("Layer line width: %d bits\n", fb->pitches[0] * 8);
+ regmap_write(backend->regs, SUN4I_BACKEND_LAYLINEWIDTH_REG(layer),
+ fb->pitches[0] * 8);
+
+ /* Set height and width */
+ DRM_DEBUG_DRIVER("Layer size W: %u H: %u\n",
+ state->crtc_w, state->crtc_h);
+ regmap_write(backend->regs, SUN4I_BACKEND_LAYSIZE_REG(layer),
+ SUN4I_BACKEND_LAYSIZE(state->crtc_w,
+ state->crtc_h));
+
+ /* Set base coordinates */
+ DRM_DEBUG_DRIVER("Layer coordinates X: %d Y: %d\n",
+ state->crtc_x, state->crtc_y);
+ regmap_write(backend->regs, SUN4I_BACKEND_LAYCOOR_REG(layer),
+ SUN4I_BACKEND_LAYCOOR(state->crtc_x,
+ state->crtc_y));
+
+ return 0;
+}
+EXPORT_SYMBOL(sun4i_backend_update_layer_coord);
+
+int sun4i_backend_update_layer_formats(struct sun4i_backend *backend,
+ int layer, struct drm_plane *plane)
+{
+ struct drm_plane_state *state = plane->state;
+ struct drm_framebuffer *fb = state->fb;
+ bool interlaced = false;
+ u32 val;
+ int ret;
+
+ if (plane->state->crtc)
+ interlaced = plane->state->crtc->state->adjusted_mode.flags
+ & DRM_MODE_FLAG_INTERLACE;
+
+ regmap_update_bits(backend->regs, SUN4I_BACKEND_MODCTL_REG,
+ SUN4I_BACKEND_MODCTL_ITLMOD_EN,
+ interlaced ? SUN4I_BACKEND_MODCTL_ITLMOD_EN : 0);
+
+ DRM_DEBUG_DRIVER("Switching display backend interlaced mode %s\n",
+ interlaced ? "on" : "off");
+
+ ret = sun4i_backend_drm_format_to_layer(fb->pixel_format, &val);
+ if (ret) {
+ DRM_DEBUG_DRIVER("Invalid format\n");
+ return val;
+ }
+
+ regmap_update_bits(backend->regs, SUN4I_BACKEND_ATTCTL_REG1(layer),
+ SUN4I_BACKEND_ATTCTL_REG1_LAY_FBFMT, val);
+
+ return 0;
+}
+EXPORT_SYMBOL(sun4i_backend_update_layer_formats);
+
+int sun4i_backend_update_layer_buffer(struct sun4i_backend *backend,
+ int layer, struct drm_plane *plane)
+{
+ struct drm_plane_state *state = plane->state;
+ struct drm_framebuffer *fb = state->fb;
+ struct drm_gem_cma_object *gem;
+ u32 lo_paddr, hi_paddr;
+ dma_addr_t paddr;
+ int bpp;
+
+ /* Get the physical address of the buffer in memory */
+ gem = drm_fb_cma_get_gem_obj(fb, 0);
+
+ DRM_DEBUG_DRIVER("Using GEM @ 0x%x\n", gem->paddr);
+
+ /* Compute the start of the displayed memory */
+ bpp = drm_format_plane_cpp(fb->pixel_format, 0);
+ paddr = gem->paddr + fb->offsets[0];
+ paddr += (state->src_x >> 16) * bpp;
+ paddr += (state->src_y >> 16) * fb->pitches[0];
+
+ DRM_DEBUG_DRIVER("Setting buffer address to 0x%x\n", paddr);
+
+ /* Write the 32 lower bits of the address (in bits) */
+ lo_paddr = paddr << 3;
+ DRM_DEBUG_DRIVER("Setting address lower bits to 0x%x\n", lo_paddr);
+ regmap_write(backend->regs, SUN4I_BACKEND_LAYFB_L32ADD_REG(layer),
+ lo_paddr);
+
+ /* And the upper bits */
+ hi_paddr = paddr >> 29;
+ DRM_DEBUG_DRIVER("Setting address high bits to 0x%x\n", hi_paddr);
+ regmap_update_bits(backend->regs, SUN4I_BACKEND_LAYFB_H4ADD_REG,
+ SUN4I_BACKEND_LAYFB_H4ADD_MSK(layer),
+ SUN4I_BACKEND_LAYFB_H4ADD(layer, hi_paddr));
+
+ return 0;
+}
+EXPORT_SYMBOL(sun4i_backend_update_layer_buffer);
+
+static struct regmap_config sun4i_backend_regmap_config = {
+ .reg_bits = 32,
+ .val_bits = 32,
+ .reg_stride = 4,
+ .max_register = 0x5800,
+};
+
+static int sun4i_backend_bind(struct device *dev, struct device *master,
+ void *data)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ struct drm_device *drm = data;
+ struct sun4i_drv *drv = drm->dev_private;
+ struct sun4i_backend *backend;
+ struct resource *res;
+ void __iomem *regs;
+ int i, ret;
+
+ backend = devm_kzalloc(dev, sizeof(*backend), GFP_KERNEL);
+ if (!backend)
+ return -ENOMEM;
+ dev_set_drvdata(dev, backend);
+ drv->backend = backend;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ regs = devm_ioremap_resource(dev, res);
+ if (IS_ERR(regs)) {
+ dev_err(dev, "Couldn't map the backend registers\n");
+ return PTR_ERR(regs);
+ }
+
+ backend->regs = devm_regmap_init_mmio(dev, regs,
+ &sun4i_backend_regmap_config);
+ if (IS_ERR(backend->regs)) {
+ dev_err(dev, "Couldn't create the backend0 regmap\n");
+ return PTR_ERR(backend->regs);
+ }
+
+ backend->reset = devm_reset_control_get(dev, NULL);
+ if (IS_ERR(backend->reset)) {
+ dev_err(dev, "Couldn't get our reset line\n");
+ return PTR_ERR(backend->reset);
+ }
+
+ ret = reset_control_deassert(backend->reset);
+ if (ret) {
+ dev_err(dev, "Couldn't deassert our reset line\n");
+ return ret;
+ }
+
+ backend->bus_clk = devm_clk_get(dev, "ahb");
+ if (IS_ERR(backend->bus_clk)) {
+ dev_err(dev, "Couldn't get the backend bus clock\n");
+ ret = PTR_ERR(backend->bus_clk);
+ goto err_assert_reset;
+ }
+ clk_prepare_enable(backend->bus_clk);
+
+ backend->mod_clk = devm_clk_get(dev, "mod");
+ if (IS_ERR(backend->mod_clk)) {
+ dev_err(dev, "Couldn't get the backend module clock\n");
+ ret = PTR_ERR(backend->mod_clk);
+ goto err_disable_bus_clk;
+ }
+ clk_prepare_enable(backend->mod_clk);
+
+ backend->ram_clk = devm_clk_get(dev, "ram");
+ if (IS_ERR(backend->ram_clk)) {
+ dev_err(dev, "Couldn't get the backend RAM clock\n");
+ ret = PTR_ERR(backend->ram_clk);
+ goto err_disable_mod_clk;
+ }
+ clk_prepare_enable(backend->ram_clk);
+
+ /* Reset the registers */
+ for (i = 0x800; i < 0x1000; i += 4)
+ regmap_write(backend->regs, i, 0);
+
+ /* Disable registers autoloading */
+ regmap_write(backend->regs, SUN4I_BACKEND_REGBUFFCTL_REG,
+ SUN4I_BACKEND_REGBUFFCTL_AUTOLOAD_DIS);
+
+ /* Enable the backend */
+ regmap_write(backend->regs, SUN4I_BACKEND_MODCTL_REG,
+ SUN4I_BACKEND_MODCTL_DEBE_EN |
+ SUN4I_BACKEND_MODCTL_START_CTL);
+
+ return 0;
+
+err_disable_mod_clk:
+ clk_disable_unprepare(backend->mod_clk);
+err_disable_bus_clk:
+ clk_disable_unprepare(backend->bus_clk);
+err_assert_reset:
+ reset_control_assert(backend->reset);
+ return ret;
+}
+
+static void sun4i_backend_unbind(struct device *dev, struct device *master,
+ void *data)
+{
+ struct sun4i_backend *backend = dev_get_drvdata(dev);
+
+ clk_disable_unprepare(backend->ram_clk);
+ clk_disable_unprepare(backend->mod_clk);
+ clk_disable_unprepare(backend->bus_clk);
+ reset_control_assert(backend->reset);
+}
+
+static struct component_ops sun4i_backend_ops = {
+ .bind = sun4i_backend_bind,
+ .unbind = sun4i_backend_unbind,
+};
+
+static int sun4i_backend_probe(struct platform_device *pdev)
+{
+ return component_add(&pdev->dev, &sun4i_backend_ops);
+}
+
+static int sun4i_backend_remove(struct platform_device *pdev)
+{
+ component_del(&pdev->dev, &sun4i_backend_ops);
+
+ return 0;
+}
+
+static const struct of_device_id sun4i_backend_of_table[] = {
+ { .compatible = "allwinner,sun5i-a13-display-backend" },
+ { }
+};
+MODULE_DEVICE_TABLE(of, sun4i_backend_of_table);
+
+static struct platform_driver sun4i_backend_platform_driver = {
+ .probe = sun4i_backend_probe,
+ .remove = sun4i_backend_remove,
+ .driver = {
+ .name = "sun4i-backend",
+ .of_match_table = sun4i_backend_of_table,
+ },
+};
+module_platform_driver(sun4i_backend_platform_driver);
+
+MODULE_AUTHOR("Maxime Ripard <maxime.ripard@free-electrons.com>");
+MODULE_DESCRIPTION("Allwinner A10 Display Backend Driver");
+MODULE_LICENSE("GPL");
--- /dev/null
+/*
+ * Copyright (C) 2015 Free Electrons
+ * Copyright (C) 2015 NextThing Co
+ *
+ * Maxime Ripard <maxime.ripard@free-electrons.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ */
+
+#ifndef _SUN4I_BACKEND_H_
+#define _SUN4I_BACKEND_H_
+
+#include <linux/clk.h>
+#include <linux/regmap.h>
+#include <linux/reset.h>
+
+#define SUN4I_BACKEND_MODCTL_REG 0x800
+#define SUN4I_BACKEND_MODCTL_LINE_SEL BIT(29)
+#define SUN4I_BACKEND_MODCTL_ITLMOD_EN BIT(28)
+#define SUN4I_BACKEND_MODCTL_OUT_SEL GENMASK(22, 20)
+#define SUN4I_BACKEND_MODCTL_OUT_LCD (0 << 20)
+#define SUN4I_BACKEND_MODCTL_OUT_FE0 (6 << 20)
+#define SUN4I_BACKEND_MODCTL_OUT_FE1 (7 << 20)
+#define SUN4I_BACKEND_MODCTL_HWC_EN BIT(16)
+#define SUN4I_BACKEND_MODCTL_LAY_EN(l) BIT(8 + l)
+#define SUN4I_BACKEND_MODCTL_OCSC_EN BIT(5)
+#define SUN4I_BACKEND_MODCTL_DFLK_EN BIT(4)
+#define SUN4I_BACKEND_MODCTL_DLP_START_CTL BIT(2)
+#define SUN4I_BACKEND_MODCTL_START_CTL BIT(1)
+#define SUN4I_BACKEND_MODCTL_DEBE_EN BIT(0)
+
+#define SUN4I_BACKEND_BACKCOLOR_REG 0x804
+#define SUN4I_BACKEND_BACKCOLOR(r, g, b) (((r) << 16) | ((g) << 8) | (b))
+
+#define SUN4I_BACKEND_DISSIZE_REG 0x808
+#define SUN4I_BACKEND_DISSIZE(w, h) (((((h) - 1) & 0xffff) << 16) | \
+ (((w) - 1) & 0xffff))
+
+#define SUN4I_BACKEND_LAYSIZE_REG(l) (0x810 + (0x4 * (l)))
+#define SUN4I_BACKEND_LAYSIZE(w, h) (((((h) - 1) & 0x1fff) << 16) | \
+ (((w) - 1) & 0x1fff))
+
+#define SUN4I_BACKEND_LAYCOOR_REG(l) (0x820 + (0x4 * (l)))
+#define SUN4I_BACKEND_LAYCOOR(x, y) ((((u32)(y) & 0xffff) << 16) | \
+ ((u32)(x) & 0xffff))
+
+#define SUN4I_BACKEND_LAYLINEWIDTH_REG(l) (0x840 + (0x4 * (l)))
+
+#define SUN4I_BACKEND_LAYFB_L32ADD_REG(l) (0x850 + (0x4 * (l)))
+
+#define SUN4I_BACKEND_LAYFB_H4ADD_REG 0x860
+#define SUN4I_BACKEND_LAYFB_H4ADD_MSK(l) GENMASK(3 + ((l) * 8), 0)
+#define SUN4I_BACKEND_LAYFB_H4ADD(l, val) ((val) << ((l) * 8))
+
+#define SUN4I_BACKEND_REGBUFFCTL_REG 0x870
+#define SUN4I_BACKEND_REGBUFFCTL_AUTOLOAD_DIS BIT(1)
+#define SUN4I_BACKEND_REGBUFFCTL_LOADCTL BIT(0)
+
+#define SUN4I_BACKEND_CKMAX_REG 0x880
+#define SUN4I_BACKEND_CKMIN_REG 0x884
+#define SUN4I_BACKEND_CKCFG_REG 0x888
+#define SUN4I_BACKEND_ATTCTL_REG0(l) (0x890 + (0x4 * (l)))
+#define SUN4I_BACKEND_ATTCTL_REG0_LAY_PIPESEL_MASK BIT(15)
+#define SUN4I_BACKEND_ATTCTL_REG0_LAY_PIPESEL(x) ((x) << 15)
+#define SUN4I_BACKEND_ATTCTL_REG0_LAY_PRISEL_MASK GENMASK(11, 10)
+#define SUN4I_BACKEND_ATTCTL_REG0_LAY_PRISEL(x) ((x) << 10)
+
+#define SUN4I_BACKEND_ATTCTL_REG1(l) (0x8a0 + (0x4 * (l)))
+#define SUN4I_BACKEND_ATTCTL_REG1_LAY_HSCAFCT GENMASK(15, 14)
+#define SUN4I_BACKEND_ATTCTL_REG1_LAY_WSCAFCT GENMASK(13, 12)
+#define SUN4I_BACKEND_ATTCTL_REG1_LAY_FBFMT GENMASK(11, 8)
+#define SUN4I_BACKEND_LAY_FBFMT_1BPP (0 << 8)
+#define SUN4I_BACKEND_LAY_FBFMT_2BPP (1 << 8)
+#define SUN4I_BACKEND_LAY_FBFMT_4BPP (2 << 8)
+#define SUN4I_BACKEND_LAY_FBFMT_8BPP (3 << 8)
+#define SUN4I_BACKEND_LAY_FBFMT_RGB655 (4 << 8)
+#define SUN4I_BACKEND_LAY_FBFMT_RGB565 (5 << 8)
+#define SUN4I_BACKEND_LAY_FBFMT_RGB556 (6 << 8)
+#define SUN4I_BACKEND_LAY_FBFMT_ARGB1555 (7 << 8)
+#define SUN4I_BACKEND_LAY_FBFMT_RGBA5551 (8 << 8)
+#define SUN4I_BACKEND_LAY_FBFMT_XRGB8888 (9 << 8)
+#define SUN4I_BACKEND_LAY_FBFMT_ARGB8888 (10 << 8)
+#define SUN4I_BACKEND_LAY_FBFMT_RGB888 (11 << 8)
+#define SUN4I_BACKEND_LAY_FBFMT_ARGB4444 (12 << 8)
+#define SUN4I_BACKEND_LAY_FBFMT_RGBA4444 (13 << 8)
+
+#define SUN4I_BACKEND_DLCDPCTL_REG 0x8b0
+#define SUN4I_BACKEND_DLCDPFRMBUF_ADDRCTL_REG 0x8b4
+#define SUN4I_BACKEND_DLCDPCOOR_REG0 0x8b8
+#define SUN4I_BACKEND_DLCDPCOOR_REG1 0x8bc
+
+#define SUN4I_BACKEND_INT_EN_REG 0x8c0
+#define SUN4I_BACKEND_INT_FLAG_REG 0x8c4
+#define SUN4I_BACKEND_REG_LOAD_FINISHED BIT(1)
+
+#define SUN4I_BACKEND_HWCCTL_REG 0x8d8
+#define SUN4I_BACKEND_HWCFBCTL_REG 0x8e0
+#define SUN4I_BACKEND_WBCTL_REG 0x8f0
+#define SUN4I_BACKEND_WBADD_REG 0x8f4
+#define SUN4I_BACKEND_WBLINEWIDTH_REG 0x8f8
+#define SUN4I_BACKEND_SPREN_REG 0x900
+#define SUN4I_BACKEND_SPRFMTCTL_REG 0x908
+#define SUN4I_BACKEND_SPRALPHACTL_REG 0x90c
+#define SUN4I_BACKEND_IYUVCTL_REG 0x920
+#define SUN4I_BACKEND_IYUVADD_REG(c) (0x930 + (0x4 * (c)))
+#define SUN4I_BACKEND_IYUVLINEWITDTH_REG(c) (0x940 + (0x4 * (c)))
+#define SUN4I_BACKEND_YGCOEF_REG(c) (0x950 + (0x4 * (c)))
+#define SUN4I_BACKEND_YGCONS_REG 0x95c
+#define SUN4I_BACKEND_URCOEF_REG(c) (0x960 + (0x4 * (c)))
+#define SUN4I_BACKEND_URCONS_REG 0x96c
+#define SUN4I_BACKEND_VBCOEF_REG(c) (0x970 + (0x4 * (c)))
+#define SUN4I_BACKEND_VBCONS_REG 0x97c
+#define SUN4I_BACKEND_KSCTL_REG 0x980
+#define SUN4I_BACKEND_KSBKCOLOR_REG 0x984
+#define SUN4I_BACKEND_KSFSTLINEWIDTH_REG 0x988
+#define SUN4I_BACKEND_KSVSCAFCT_REG 0x98c
+#define SUN4I_BACKEND_KSHSCACOEF_REG(x) (0x9a0 + (0x4 * (x)))
+#define SUN4I_BACKEND_OCCTL_REG 0x9c0
+#define SUN4I_BACKEND_OCCTL_ENABLE BIT(0)
+
+#define SUN4I_BACKEND_OCRCOEF_REG(x) (0x9d0 + (0x4 * (x)))
+#define SUN4I_BACKEND_OCRCONS_REG 0x9dc
+#define SUN4I_BACKEND_OCGCOEF_REG(x) (0x9e0 + (0x4 * (x)))
+#define SUN4I_BACKEND_OCGCONS_REG 0x9ec
+#define SUN4I_BACKEND_OCBCOEF_REG(x) (0x9f0 + (0x4 * (x)))
+#define SUN4I_BACKEND_OCBCONS_REG 0x9fc
+#define SUN4I_BACKEND_SPRCOORCTL_REG(s) (0xa00 + (0x4 * (s)))
+#define SUN4I_BACKEND_SPRATTCTL_REG(s) (0xb00 + (0x4 * (s)))
+#define SUN4I_BACKEND_SPRADD_REG(s) (0xc00 + (0x4 * (s)))
+#define SUN4I_BACKEND_SPRLINEWIDTH_REG(s) (0xd00 + (0x4 * (s)))
+
+#define SUN4I_BACKEND_SPRPALTAB_OFF 0x4000
+#define SUN4I_BACKEND_GAMMATAB_OFF 0x4400
+#define SUN4I_BACKEND_HWCPATTERN_OFF 0x4800
+#define SUN4I_BACKEND_HWCCOLORTAB_OFF 0x4c00
+#define SUN4I_BACKEND_PIPE_OFF(p) (0x5000 + (0x400 * (p)))
+
+struct sun4i_backend {
+ struct regmap *regs;
+
+ struct reset_control *reset;
+
+ struct clk *bus_clk;
+ struct clk *mod_clk;
+ struct clk *ram_clk;
+};
+
+void sun4i_backend_apply_color_correction(struct sun4i_backend *backend);
+void sun4i_backend_disable_color_correction(struct sun4i_backend *backend);
+
+void sun4i_backend_commit(struct sun4i_backend *backend);
+
+void sun4i_backend_layer_enable(struct sun4i_backend *backend,
+ int layer, bool enable);
+int sun4i_backend_update_layer_coord(struct sun4i_backend *backend,
+ int layer, struct drm_plane *plane);
+int sun4i_backend_update_layer_formats(struct sun4i_backend *backend,
+ int layer, struct drm_plane *plane);
+int sun4i_backend_update_layer_buffer(struct sun4i_backend *backend,
+ int layer, struct drm_plane *plane);
+
+#endif /* _SUN4I_BACKEND_H_ */
--- /dev/null
+/*
+ * Copyright (C) 2015 Free Electrons
+ * Copyright (C) 2015 NextThing Co
+ *
+ * Maxime Ripard <maxime.ripard@free-electrons.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ */
+
+#include <drm/drmP.h>
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_crtc.h>
+#include <drm/drm_crtc_helper.h>
+#include <drm/drm_modes.h>
+
+#include <linux/clk-provider.h>
+#include <linux/ioport.h>
+#include <linux/of_address.h>
+#include <linux/of_irq.h>
+#include <linux/regmap.h>
+
+#include <video/videomode.h>
+
+#include "sun4i_backend.h"
+#include "sun4i_crtc.h"
+#include "sun4i_drv.h"
+#include "sun4i_tcon.h"
+
+static void sun4i_crtc_atomic_begin(struct drm_crtc *crtc,
+ struct drm_crtc_state *old_state)
+{
+ struct sun4i_crtc *scrtc = drm_crtc_to_sun4i_crtc(crtc);
+ struct drm_device *dev = crtc->dev;
+ unsigned long flags;
+
+ if (crtc->state->event) {
+ WARN_ON(drm_crtc_vblank_get(crtc) != 0);
+
+ spin_lock_irqsave(&dev->event_lock, flags);
+ scrtc->event = crtc->state->event;
+ spin_unlock_irqrestore(&dev->event_lock, flags);
+ crtc->state->event = NULL;
+ }
+}
+
+static void sun4i_crtc_atomic_flush(struct drm_crtc *crtc,
+ struct drm_crtc_state *old_state)
+{
+ struct sun4i_crtc *scrtc = drm_crtc_to_sun4i_crtc(crtc);
+ struct sun4i_drv *drv = scrtc->drv;
+
+ DRM_DEBUG_DRIVER("Committing plane changes\n");
+
+ sun4i_backend_commit(drv->backend);
+}
+
+static void sun4i_crtc_disable(struct drm_crtc *crtc)
+{
+ struct sun4i_crtc *scrtc = drm_crtc_to_sun4i_crtc(crtc);
+ struct sun4i_drv *drv = scrtc->drv;
+
+ DRM_DEBUG_DRIVER("Disabling the CRTC\n");
+
+ sun4i_tcon_disable(drv->tcon);
+}
+
+static void sun4i_crtc_enable(struct drm_crtc *crtc)
+{
+ struct sun4i_crtc *scrtc = drm_crtc_to_sun4i_crtc(crtc);
+ struct sun4i_drv *drv = scrtc->drv;
+
+ DRM_DEBUG_DRIVER("Enabling the CRTC\n");
+
+ sun4i_tcon_enable(drv->tcon);
+}
+
+static const struct drm_crtc_helper_funcs sun4i_crtc_helper_funcs = {
+ .atomic_begin = sun4i_crtc_atomic_begin,
+ .atomic_flush = sun4i_crtc_atomic_flush,
+ .disable = sun4i_crtc_disable,
+ .enable = sun4i_crtc_enable,
+};
+
+static const struct drm_crtc_funcs sun4i_crtc_funcs = {
+ .atomic_destroy_state = drm_atomic_helper_crtc_destroy_state,
+ .atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state,
+ .destroy = drm_crtc_cleanup,
+ .page_flip = drm_atomic_helper_page_flip,
+ .reset = drm_atomic_helper_crtc_reset,
+ .set_config = drm_atomic_helper_set_config,
+};
+
+struct sun4i_crtc *sun4i_crtc_init(struct drm_device *drm)
+{
+ struct sun4i_drv *drv = drm->dev_private;
+ struct sun4i_crtc *scrtc;
+ int ret;
+
+ scrtc = devm_kzalloc(drm->dev, sizeof(*scrtc), GFP_KERNEL);
+ if (!scrtc)
+ return NULL;
+ scrtc->drv = drv;
+
+ ret = drm_crtc_init_with_planes(drm, &scrtc->crtc,
+ drv->primary,
+ NULL,
+ &sun4i_crtc_funcs,
+ NULL);
+ if (ret) {
+ dev_err(drm->dev, "Couldn't init DRM CRTC\n");
+ return NULL;
+ }
+
+ drm_crtc_helper_add(&scrtc->crtc, &sun4i_crtc_helper_funcs);
+
+ return scrtc;
+}
--- /dev/null
+/*
+ * Copyright (C) 2015 Free Electrons
+ * Copyright (C) 2015 NextThing Co
+ *
+ * Maxime Ripard <maxime.ripard@free-electrons.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ */
+
+#ifndef _SUN4I_CRTC_H_
+#define _SUN4I_CRTC_H_
+
+struct sun4i_crtc {
+ struct drm_crtc crtc;
+ struct drm_pending_vblank_event *event;
+
+ struct sun4i_drv *drv;
+};
+
+static inline struct sun4i_crtc *drm_crtc_to_sun4i_crtc(struct drm_crtc *crtc)
+{
+ return container_of(crtc, struct sun4i_crtc, crtc);
+}
+
+struct sun4i_crtc *sun4i_crtc_init(struct drm_device *drm);
+
+#endif /* _SUN4I_CRTC_H_ */
--- /dev/null
+/*
+ * Copyright (C) 2016 Free Electrons
+ * Copyright (C) 2016 NextThing Co
+ *
+ * Maxime Ripard <maxime.ripard@free-electrons.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ */
+
+#include <linux/clk-provider.h>
+#include <linux/regmap.h>
+
+#include "sun4i_tcon.h"
+
+struct sun4i_dclk {
+ struct clk_hw hw;
+ struct regmap *regmap;
+};
+
+static inline struct sun4i_dclk *hw_to_dclk(struct clk_hw *hw)
+{
+ return container_of(hw, struct sun4i_dclk, hw);
+}
+
+static void sun4i_dclk_disable(struct clk_hw *hw)
+{
+ struct sun4i_dclk *dclk = hw_to_dclk(hw);
+
+ regmap_update_bits(dclk->regmap, SUN4I_TCON0_DCLK_REG,
+ BIT(SUN4I_TCON0_DCLK_GATE_BIT), 0);
+}
+
+static int sun4i_dclk_enable(struct clk_hw *hw)
+{
+ struct sun4i_dclk *dclk = hw_to_dclk(hw);
+
+ return regmap_update_bits(dclk->regmap, SUN4I_TCON0_DCLK_REG,
+ BIT(SUN4I_TCON0_DCLK_GATE_BIT),
+ BIT(SUN4I_TCON0_DCLK_GATE_BIT));
+}
+
+static int sun4i_dclk_is_enabled(struct clk_hw *hw)
+{
+ struct sun4i_dclk *dclk = hw_to_dclk(hw);
+ u32 val;
+
+ regmap_read(dclk->regmap, SUN4I_TCON0_DCLK_REG, &val);
+
+ return val & BIT(SUN4I_TCON0_DCLK_GATE_BIT);
+}
+
+static unsigned long sun4i_dclk_recalc_rate(struct clk_hw *hw,
+ unsigned long parent_rate)
+{
+ struct sun4i_dclk *dclk = hw_to_dclk(hw);
+ u32 val;
+
+ regmap_read(dclk->regmap, SUN4I_TCON0_DCLK_REG, &val);
+
+ val >>= SUN4I_TCON0_DCLK_DIV_SHIFT;
+ val &= SUN4I_TCON0_DCLK_DIV_WIDTH;
+
+ if (!val)
+ val = 1;
+
+ return parent_rate / val;
+}
+
+static long sun4i_dclk_round_rate(struct clk_hw *hw, unsigned long rate,
+ unsigned long *parent_rate)
+{
+ return *parent_rate / DIV_ROUND_CLOSEST(*parent_rate, rate);
+}
+
+static int sun4i_dclk_set_rate(struct clk_hw *hw, unsigned long rate,
+ unsigned long parent_rate)
+{
+ struct sun4i_dclk *dclk = hw_to_dclk(hw);
+ int div = DIV_ROUND_CLOSEST(parent_rate, rate);
+
+ return regmap_update_bits(dclk->regmap, SUN4I_TCON0_DCLK_REG,
+ GENMASK(6, 0), div);
+}
+
+static int sun4i_dclk_get_phase(struct clk_hw *hw)
+{
+ struct sun4i_dclk *dclk = hw_to_dclk(hw);
+ u32 val;
+
+ regmap_read(dclk->regmap, SUN4I_TCON0_IO_POL_REG, &val);
+
+ val >>= 28;
+ val &= 3;
+
+ return val * 120;
+}
+
+static int sun4i_dclk_set_phase(struct clk_hw *hw, int degrees)
+{
+ struct sun4i_dclk *dclk = hw_to_dclk(hw);
+
+ regmap_update_bits(dclk->regmap, SUN4I_TCON0_IO_POL_REG,
+ GENMASK(29, 28),
+ degrees / 120);
+
+ return 0;
+}
+
+static const struct clk_ops sun4i_dclk_ops = {
+ .disable = sun4i_dclk_disable,
+ .enable = sun4i_dclk_enable,
+ .is_enabled = sun4i_dclk_is_enabled,
+
+ .recalc_rate = sun4i_dclk_recalc_rate,
+ .round_rate = sun4i_dclk_round_rate,
+ .set_rate = sun4i_dclk_set_rate,
+
+ .get_phase = sun4i_dclk_get_phase,
+ .set_phase = sun4i_dclk_set_phase,
+};
+
+int sun4i_dclk_create(struct device *dev, struct sun4i_tcon *tcon)
+{
+ const char *clk_name, *parent_name;
+ struct clk_init_data init;
+ struct sun4i_dclk *dclk;
+
+ parent_name = __clk_get_name(tcon->sclk0);
+ of_property_read_string_index(dev->of_node, "clock-output-names", 0,
+ &clk_name);
+
+ dclk = devm_kzalloc(dev, sizeof(*dclk), GFP_KERNEL);
+ if (!dclk)
+ return -ENOMEM;
+
+ init.name = clk_name;
+ init.ops = &sun4i_dclk_ops;
+ init.parent_names = &parent_name;
+ init.num_parents = 1;
+
+ dclk->regmap = tcon->regs;
+ dclk->hw.init = &init;
+
+ tcon->dclk = clk_register(dev, &dclk->hw);
+ if (IS_ERR(tcon->dclk))
+ return PTR_ERR(tcon->dclk);
+
+ return 0;
+}
+EXPORT_SYMBOL(sun4i_dclk_create);
+
+int sun4i_dclk_free(struct sun4i_tcon *tcon)
+{
+ clk_unregister(tcon->dclk);
+ return 0;
+}
+EXPORT_SYMBOL(sun4i_dclk_free);
--- /dev/null
+/*
+ * Copyright (C) 2015 Free Electrons
+ * Copyright (C) 2015 NextThing Co
+ *
+ * Maxime Ripard <maxime.ripard@free-electrons.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ */
+
+#ifndef _SUN4I_DOTCLOCK_H_
+#define _SUN4I_DOTCLOCK_H_
+
+struct sun4i_tcon;
+
+int sun4i_dclk_create(struct device *dev, struct sun4i_tcon *tcon);
+int sun4i_dclk_free(struct sun4i_tcon *tcon);
+
+#endif /* _SUN4I_DOTCLOCK_H_ */
--- /dev/null
+/*
+ * Copyright (C) 2015 Free Electrons
+ * Copyright (C) 2015 NextThing Co
+ *
+ * Maxime Ripard <maxime.ripard@free-electrons.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ */
+
+#include <linux/component.h>
+#include <linux/of_graph.h>
+
+#include <drm/drmP.h>
+#include <drm/drm_crtc_helper.h>
+#include <drm/drm_fb_cma_helper.h>
+#include <drm/drm_gem_cma_helper.h>
+
+#include "sun4i_crtc.h"
+#include "sun4i_drv.h"
+#include "sun4i_framebuffer.h"
+#include "sun4i_layer.h"
+#include "sun4i_tcon.h"
+
+static int sun4i_drv_connector_plug_all(struct drm_device *drm)
+{
+ struct drm_connector *connector, *failed;
+ int ret;
+
+ mutex_lock(&drm->mode_config.mutex);
+ list_for_each_entry(connector, &drm->mode_config.connector_list, head) {
+ ret = drm_connector_register(connector);
+ if (ret) {
+ failed = connector;
+ goto err;
+ }
+ }
+ mutex_unlock(&drm->mode_config.mutex);
+ return 0;
+
+err:
+ list_for_each_entry(connector, &drm->mode_config.connector_list, head) {
+ if (failed == connector)
+ break;
+
+ drm_connector_unregister(connector);
+ }
+ mutex_unlock(&drm->mode_config.mutex);
+
+ return ret;
+}
+
+static int sun4i_drv_enable_vblank(struct drm_device *drm, unsigned int pipe)
+{
+ struct sun4i_drv *drv = drm->dev_private;
+ struct sun4i_tcon *tcon = drv->tcon;
+
+ DRM_DEBUG_DRIVER("Enabling VBLANK on pipe %d\n", pipe);
+
+ sun4i_tcon_enable_vblank(tcon, true);
+
+ return 0;
+}
+
+static void sun4i_drv_disable_vblank(struct drm_device *drm, unsigned int pipe)
+{
+ struct sun4i_drv *drv = drm->dev_private;
+ struct sun4i_tcon *tcon = drv->tcon;
+
+ DRM_DEBUG_DRIVER("Disabling VBLANK on pipe %d\n", pipe);
+
+ sun4i_tcon_enable_vblank(tcon, false);
+}
+
+static const struct file_operations sun4i_drv_fops = {
+ .owner = THIS_MODULE,
+ .open = drm_open,
+ .release = drm_release,
+ .unlocked_ioctl = drm_ioctl,
+#ifdef CONFIG_COMPAT
+ .compat_ioctl = drm_compat_ioctl,
+#endif
+ .poll = drm_poll,
+ .read = drm_read,
+ .llseek = no_llseek,
+ .mmap = drm_gem_cma_mmap,
+};
+
+static struct drm_driver sun4i_drv_driver = {
+ .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_PRIME | DRIVER_ATOMIC,
+
+ /* Generic Operations */
+ .fops = &sun4i_drv_fops,
+ .name = "sun4i-drm",
+ .desc = "Allwinner sun4i Display Engine",
+ .date = "20150629",
+ .major = 1,
+ .minor = 0,
+
+ /* GEM Operations */
+ .dumb_create = drm_gem_cma_dumb_create,
+ .dumb_destroy = drm_gem_dumb_destroy,
+ .dumb_map_offset = drm_gem_cma_dumb_map_offset,
+ .gem_free_object = drm_gem_cma_free_object,
+ .gem_vm_ops = &drm_gem_cma_vm_ops,
+
+ /* PRIME Operations */
+ .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
+ .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
+ .gem_prime_import = drm_gem_prime_import,
+ .gem_prime_export = drm_gem_prime_export,
+ .gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
+ .gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
+ .gem_prime_vmap = drm_gem_cma_prime_vmap,
+ .gem_prime_vunmap = drm_gem_cma_prime_vunmap,
+ .gem_prime_mmap = drm_gem_cma_prime_mmap,
+
+ /* Frame Buffer Operations */
+
+ /* VBlank Operations */
+ .get_vblank_counter = drm_vblank_count,
+ .enable_vblank = sun4i_drv_enable_vblank,
+ .disable_vblank = sun4i_drv_disable_vblank,
+};
+
+static int sun4i_drv_bind(struct device *dev)
+{
+ struct drm_device *drm;
+ struct sun4i_drv *drv;
+ int ret;
+
+ drm = drm_dev_alloc(&sun4i_drv_driver, dev);
+ if (!drm)
+ return -ENOMEM;
+
+ ret = drm_dev_set_unique(drm, dev_name(drm->dev));
+ if (ret)
+ goto free_drm;
+
+ drv = devm_kzalloc(dev, sizeof(*drv), GFP_KERNEL);
+ if (!drv) {
+ ret = -ENOMEM;
+ goto free_drm;
+ }
+ drm->dev_private = drv;
+
+ drm_vblank_init(drm, 1);
+ drm_mode_config_init(drm);
+
+ ret = component_bind_all(drm->dev, drm);
+ if (ret) {
+ dev_err(drm->dev, "Couldn't bind all pipelines components\n");
+ goto free_drm;
+ }
+
+ /* Create our layers */
+ drv->layers = sun4i_layers_init(drm);
+ if (!drv->layers) {
+ dev_err(drm->dev, "Couldn't create the planes\n");
+ ret = -EINVAL;
+ goto free_drm;
+ }
+
+ /* Create our CRTC */
+ drv->crtc = sun4i_crtc_init(drm);
+ if (!drv->crtc) {
+ dev_err(drm->dev, "Couldn't create the CRTC\n");
+ ret = -EINVAL;
+ goto free_drm;
+ }
+ drm->irq_enabled = true;
+
+ /* Create our framebuffer */
+ drv->fbdev = sun4i_framebuffer_init(drm);
+ if (IS_ERR(drv->fbdev)) {
+ dev_err(drm->dev, "Couldn't create our framebuffer\n");
+ ret = PTR_ERR(drv->fbdev);
+ goto free_drm;
+ }
+
+ /* Enable connectors polling */
+ drm_kms_helper_poll_init(drm);
+
+ ret = drm_dev_register(drm, 0);
+ if (ret)
+ goto free_drm;
+
+ ret = sun4i_drv_connector_plug_all(drm);
+ if (ret)
+ goto unregister_drm;
+
+ return 0;
+
+unregister_drm:
+ drm_dev_unregister(drm);
+free_drm:
+ drm_dev_unref(drm);
+ return ret;
+}
+
+static void sun4i_drv_unbind(struct device *dev)
+{
+ struct drm_device *drm = dev_get_drvdata(dev);
+
+ drm_dev_unregister(drm);
+ drm_kms_helper_poll_fini(drm);
+ sun4i_framebuffer_free(drm);
+ drm_vblank_cleanup(drm);
+ drm_dev_unref(drm);
+}
+
+static const struct component_master_ops sun4i_drv_master_ops = {
+ .bind = sun4i_drv_bind,
+ .unbind = sun4i_drv_unbind,
+};
+
+static bool sun4i_drv_node_is_frontend(struct device_node *node)
+{
+ return of_device_is_compatible(node,
+ "allwinner,sun5i-a13-display-frontend");
+}
+
+static int compare_of(struct device *dev, void *data)
+{
+ DRM_DEBUG_DRIVER("Comparing of node %s with %s\n",
+ of_node_full_name(dev->of_node),
+ of_node_full_name(data));
+
+ return dev->of_node == data;
+}
+
+static int sun4i_drv_add_endpoints(struct device *dev,
+ struct component_match **match,
+ struct device_node *node)
+{
+ struct device_node *port, *ep, *remote;
+ int count = 0;
+
+ /*
+ * We don't support the frontend for now, so we will never
+ * have a device bound. Just skip over it, but we still want
+ * the rest our pipeline to be added.
+ */
+ if (!sun4i_drv_node_is_frontend(node) &&
+ !of_device_is_available(node))
+ return 0;
+
+ if (!sun4i_drv_node_is_frontend(node)) {
+ /* Add current component */
+ DRM_DEBUG_DRIVER("Adding component %s\n",
+ of_node_full_name(node));
+ component_match_add(dev, match, compare_of, node);
+ count++;
+ }
+
+ /* Inputs are listed first, then outputs */
+ port = of_graph_get_port_by_id(node, 1);
+ if (!port) {
+ DRM_DEBUG_DRIVER("No output to bind\n");
+ return count;
+ }
+
+ for_each_available_child_of_node(port, ep) {
+ remote = of_graph_get_remote_port_parent(ep);
+ if (!remote) {
+ DRM_DEBUG_DRIVER("Error retrieving the output node\n");
+ of_node_put(remote);
+ continue;
+ }
+
+ /* Walk down our tree */
+ count += sun4i_drv_add_endpoints(dev, match, remote);
+
+ of_node_put(remote);
+ }
+
+ return count;
+}
+
+static int sun4i_drv_probe(struct platform_device *pdev)
+{
+ struct component_match *match = NULL;
+ struct device_node *np = pdev->dev.of_node;
+ int i, count = 0;
+
+ for (i = 0;; i++) {
+ struct device_node *pipeline = of_parse_phandle(np,
+ "allwinner,pipelines",
+ i);
+ if (!pipeline)
+ break;
+
+ count += sun4i_drv_add_endpoints(&pdev->dev, &match,
+ pipeline);
+
+ DRM_DEBUG_DRIVER("Queued %d outputs on pipeline %d\n",
+ count, i);
+ }
+
+ if (count)
+ return component_master_add_with_match(&pdev->dev,
+ &sun4i_drv_master_ops,
+ match);
+ else
+ return 0;
+}
+
+static int sun4i_drv_remove(struct platform_device *pdev)
+{
+ return 0;
+}
+
+static const struct of_device_id sun4i_drv_of_table[] = {
+ { .compatible = "allwinner,sun5i-a13-display-engine" },
+ { }
+};
+MODULE_DEVICE_TABLE(of, sun4i_drv_of_table);
+
+static struct platform_driver sun4i_drv_platform_driver = {
+ .probe = sun4i_drv_probe,
+ .remove = sun4i_drv_remove,
+ .driver = {
+ .name = "sun4i-drm",
+ .of_match_table = sun4i_drv_of_table,
+ },
+};
+module_platform_driver(sun4i_drv_platform_driver);
+
+MODULE_AUTHOR("Boris Brezillon <boris.brezillon@free-electrons.com>");
+MODULE_AUTHOR("Maxime Ripard <maxime.ripard@free-electrons.com>");
+MODULE_DESCRIPTION("Allwinner A10 Display Engine DRM/KMS Driver");
+MODULE_LICENSE("GPL");
--- /dev/null
+/*
+ * Copyright (C) 2015 Free Electrons
+ * Copyright (C) 2015 NextThing Co
+ *
+ * Maxime Ripard <maxime.ripard@free-electrons.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ */
+
+#ifndef _SUN4I_DRV_H_
+#define _SUN4I_DRV_H_
+
+#include <linux/clk.h>
+#include <linux/regmap.h>
+
+struct sun4i_drv {
+ struct sun4i_backend *backend;
+ struct sun4i_crtc *crtc;
+ struct sun4i_tcon *tcon;
+
+ struct drm_plane *primary;
+ struct drm_fbdev_cma *fbdev;
+
+ struct sun4i_layer **layers;
+};
+
+#endif /* _SUN4I_DRV_H_ */
--- /dev/null
+/*
+ * Copyright (C) 2015 Free Electrons
+ * Copyright (C) 2015 NextThing Co
+ *
+ * Maxime Ripard <maxime.ripard@free-electrons.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ */
+
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_fb_cma_helper.h>
+#include <drm/drmP.h>
+
+#include "sun4i_drv.h"
+
+static void sun4i_de_output_poll_changed(struct drm_device *drm)
+{
+ struct sun4i_drv *drv = drm->dev_private;
+
+ if (drv->fbdev)
+ drm_fbdev_cma_hotplug_event(drv->fbdev);
+}
+
+static const struct drm_mode_config_funcs sun4i_de_mode_config_funcs = {
+ .output_poll_changed = sun4i_de_output_poll_changed,
+ .atomic_check = drm_atomic_helper_check,
+ .atomic_commit = drm_atomic_helper_commit,
+ .fb_create = drm_fb_cma_create,
+};
+
+struct drm_fbdev_cma *sun4i_framebuffer_init(struct drm_device *drm)
+{
+ drm_mode_config_reset(drm);
+
+ drm->mode_config.max_width = 8192;
+ drm->mode_config.max_height = 8192;
+
+ drm->mode_config.funcs = &sun4i_de_mode_config_funcs;
+
+ return drm_fbdev_cma_init(drm, 32,
+ drm->mode_config.num_crtc,
+ drm->mode_config.num_connector);
+}
+
+void sun4i_framebuffer_free(struct drm_device *drm)
+{
+ struct sun4i_drv *drv = drm->dev_private;
+
+ drm_fbdev_cma_fini(drv->fbdev);
+ drm_mode_config_cleanup(drm);
+}
--- /dev/null
+/*
+ * Copyright (C) 2015 Free Electrons
+ * Copyright (C) 2015 NextThing Co
+ *
+ * Maxime Ripard <maxime.ripard@free-electrons.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ */
+
+#ifndef _SUN4I_FRAMEBUFFER_H_
+#define _SUN4I_FRAMEBUFFER_H_
+
+struct drm_fbdev_cma *sun4i_framebuffer_init(struct drm_device *drm);
+void sun4i_framebuffer_free(struct drm_device *drm);
+
+#endif /* _SUN4I_FRAMEBUFFER_H_ */
--- /dev/null
+/*
+ * Copyright (C) 2015 Free Electrons
+ * Copyright (C) 2015 NextThing Co
+ *
+ * Maxime Ripard <maxime.ripard@free-electrons.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ */
+
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_crtc.h>
+#include <drm/drm_plane_helper.h>
+#include <drm/drmP.h>
+
+#include "sun4i_backend.h"
+#include "sun4i_drv.h"
+#include "sun4i_layer.h"
+
+#define SUN4I_NUM_LAYERS 2
+
+static int sun4i_backend_layer_atomic_check(struct drm_plane *plane,
+ struct drm_plane_state *state)
+{
+ return 0;
+}
+
+static void sun4i_backend_layer_atomic_disable(struct drm_plane *plane,
+ struct drm_plane_state *old_state)
+{
+ struct sun4i_layer *layer = plane_to_sun4i_layer(plane);
+ struct sun4i_drv *drv = layer->drv;
+ struct sun4i_backend *backend = drv->backend;
+
+ sun4i_backend_layer_enable(backend, layer->id, false);
+}
+
+static void sun4i_backend_layer_atomic_update(struct drm_plane *plane,
+ struct drm_plane_state *old_state)
+{
+ struct sun4i_layer *layer = plane_to_sun4i_layer(plane);
+ struct sun4i_drv *drv = layer->drv;
+ struct sun4i_backend *backend = drv->backend;
+
+ sun4i_backend_update_layer_coord(backend, layer->id, plane);
+ sun4i_backend_update_layer_formats(backend, layer->id, plane);
+ sun4i_backend_update_layer_buffer(backend, layer->id, plane);
+ sun4i_backend_layer_enable(backend, layer->id, true);
+}
+
+static struct drm_plane_helper_funcs sun4i_backend_layer_helper_funcs = {
+ .atomic_check = sun4i_backend_layer_atomic_check,
+ .atomic_disable = sun4i_backend_layer_atomic_disable,
+ .atomic_update = sun4i_backend_layer_atomic_update,
+};
+
+static const struct drm_plane_funcs sun4i_backend_layer_funcs = {
+ .atomic_destroy_state = drm_atomic_helper_plane_destroy_state,
+ .atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state,
+ .destroy = drm_plane_cleanup,
+ .disable_plane = drm_atomic_helper_disable_plane,
+ .reset = drm_atomic_helper_plane_reset,
+ .update_plane = drm_atomic_helper_update_plane,
+};
+
+static const uint32_t sun4i_backend_layer_formats[] = {
+ DRM_FORMAT_ARGB8888,
+ DRM_FORMAT_XRGB8888,
+ DRM_FORMAT_RGB888,
+};
+
+static struct sun4i_layer *sun4i_layer_init_one(struct drm_device *drm,
+ enum drm_plane_type type)
+{
+ struct sun4i_drv *drv = drm->dev_private;
+ struct sun4i_layer *layer;
+ int ret;
+
+ layer = devm_kzalloc(drm->dev, sizeof(*layer), GFP_KERNEL);
+ if (!layer)
+ return ERR_PTR(-ENOMEM);
+
+ ret = drm_universal_plane_init(drm, &layer->plane, BIT(0),
+ &sun4i_backend_layer_funcs,
+ sun4i_backend_layer_formats,
+ ARRAY_SIZE(sun4i_backend_layer_formats),
+ type,
+ NULL);
+ if (ret) {
+ dev_err(drm->dev, "Couldn't initialize layer\n");
+ return ERR_PTR(ret);
+ }
+
+ drm_plane_helper_add(&layer->plane,
+ &sun4i_backend_layer_helper_funcs);
+ layer->drv = drv;
+
+ if (type == DRM_PLANE_TYPE_PRIMARY)
+ drv->primary = &layer->plane;
+
+ return layer;
+}
+
+struct sun4i_layer **sun4i_layers_init(struct drm_device *drm)
+{
+ struct sun4i_drv *drv = drm->dev_private;
+ struct sun4i_layer **layers;
+ int i;
+
+ layers = devm_kcalloc(drm->dev, SUN4I_NUM_LAYERS, sizeof(**layers),
+ GFP_KERNEL);
+ if (!layers)
+ return ERR_PTR(-ENOMEM);
+
+ /*
+ * The hardware is a bit unusual here.
+ *
+ * Even though it supports 4 layers, it does the composition
+ * in two separate steps.
+ *
+ * The first one is assigning a layer to one of its two
+ * pipes. If more that 1 layer is assigned to the same pipe,
+ * and if pixels overlaps, the pipe will take the pixel from
+ * the layer with the highest priority.
+ *
+ * The second step is the actual alpha blending, that takes
+ * the two pipes as input, and uses the eventual alpha
+ * component to do the transparency between the two.
+ *
+ * This two steps scenario makes us unable to guarantee a
+ * robust alpha blending between the 4 layers in all
+ * situations. So we just expose two layers, one per pipe. On
+ * SoCs that support it, sprites could fill the need for more
+ * layers.
+ */
+ for (i = 0; i < SUN4I_NUM_LAYERS; i++) {
+ enum drm_plane_type type = (i == 0)
+ ? DRM_PLANE_TYPE_PRIMARY
+ : DRM_PLANE_TYPE_OVERLAY;
+ struct sun4i_layer *layer = layers[i];
+
+ layer = sun4i_layer_init_one(drm, type);
+ if (IS_ERR(layer)) {
+ dev_err(drm->dev, "Couldn't initialize %s plane\n",
+ i ? "overlay" : "primary");
+ return ERR_CAST(layer);
+ };
+
+ DRM_DEBUG_DRIVER("Assigning %s plane to pipe %d\n",
+ i ? "overlay" : "primary", i);
+ regmap_update_bits(drv->backend->regs, SUN4I_BACKEND_ATTCTL_REG0(i),
+ SUN4I_BACKEND_ATTCTL_REG0_LAY_PIPESEL_MASK,
+ SUN4I_BACKEND_ATTCTL_REG0_LAY_PIPESEL(i));
+
+ layer->id = i;
+ };
+
+ return layers;
+}
--- /dev/null
+/*
+ * Copyright (C) 2015 Free Electrons
+ * Copyright (C) 2015 NextThing Co
+ *
+ * Maxime Ripard <maxime.ripard@free-electrons.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ */
+
+#ifndef _SUN4I_LAYER_H_
+#define _SUN4I_LAYER_H_
+
+struct sun4i_layer {
+ struct drm_plane plane;
+ struct sun4i_drv *drv;
+ int id;
+};
+
+static inline struct sun4i_layer *
+plane_to_sun4i_layer(struct drm_plane *plane)
+{
+ return container_of(plane, struct sun4i_layer, plane);
+}
+
+struct sun4i_layer **sun4i_layers_init(struct drm_device *drm);
+
+#endif /* _SUN4I_LAYER_H_ */
--- /dev/null
+/*
+ * Copyright (C) 2015 Free Electrons
+ * Copyright (C) 2015 NextThing Co
+ *
+ * Maxime Ripard <maxime.ripard@free-electrons.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ */
+
+#include <drm/drmP.h>
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_crtc.h>
+#include <drm/drm_crtc_helper.h>
+#include <drm/drm_modes.h>
+
+#include <linux/component.h>
+#include <linux/ioport.h>
+#include <linux/of_address.h>
+#include <linux/of_irq.h>
+#include <linux/regmap.h>
+#include <linux/reset.h>
+
+#include "sun4i_crtc.h"
+#include "sun4i_dotclock.h"
+#include "sun4i_drv.h"
+#include "sun4i_tcon.h"
+
+void sun4i_tcon_disable(struct sun4i_tcon *tcon)
+{
+ DRM_DEBUG_DRIVER("Disabling TCON\n");
+
+ /* Disable the TCON */
+ regmap_update_bits(tcon->regs, SUN4I_TCON_GCTL_REG,
+ SUN4I_TCON_GCTL_TCON_ENABLE, 0);
+}
+EXPORT_SYMBOL(sun4i_tcon_disable);
+
+void sun4i_tcon_enable(struct sun4i_tcon *tcon)
+{
+ DRM_DEBUG_DRIVER("Enabling TCON\n");
+
+ /* Enable the TCON */
+ regmap_update_bits(tcon->regs, SUN4I_TCON_GCTL_REG,
+ SUN4I_TCON_GCTL_TCON_ENABLE,
+ SUN4I_TCON_GCTL_TCON_ENABLE);
+}
+EXPORT_SYMBOL(sun4i_tcon_enable);
+
+void sun4i_tcon_channel_disable(struct sun4i_tcon *tcon, int channel)
+{
+ /* Disable the TCON's channel */
+ if (channel == 0) {
+ regmap_update_bits(tcon->regs, SUN4I_TCON0_CTL_REG,
+ SUN4I_TCON0_CTL_TCON_ENABLE, 0);
+ clk_disable_unprepare(tcon->dclk);
+ } else if (channel == 1) {
+ regmap_update_bits(tcon->regs, SUN4I_TCON1_CTL_REG,
+ SUN4I_TCON1_CTL_TCON_ENABLE, 0);
+ clk_disable_unprepare(tcon->sclk1);
+ }
+}
+EXPORT_SYMBOL(sun4i_tcon_channel_disable);
+
+void sun4i_tcon_channel_enable(struct sun4i_tcon *tcon, int channel)
+{
+ /* Enable the TCON's channel */
+ if (channel == 0) {
+ regmap_update_bits(tcon->regs, SUN4I_TCON0_CTL_REG,
+ SUN4I_TCON0_CTL_TCON_ENABLE,
+ SUN4I_TCON0_CTL_TCON_ENABLE);
+ clk_prepare_enable(tcon->dclk);
+ } else if (channel == 1) {
+ regmap_update_bits(tcon->regs, SUN4I_TCON1_CTL_REG,
+ SUN4I_TCON1_CTL_TCON_ENABLE,
+ SUN4I_TCON1_CTL_TCON_ENABLE);
+ clk_prepare_enable(tcon->sclk1);
+ }
+}
+EXPORT_SYMBOL(sun4i_tcon_channel_enable);
+
+void sun4i_tcon_enable_vblank(struct sun4i_tcon *tcon, bool enable)
+{
+ u32 mask, val = 0;
+
+ DRM_DEBUG_DRIVER("%sabling VBLANK interrupt\n", enable ? "En" : "Dis");
+
+ mask = SUN4I_TCON_GINT0_VBLANK_ENABLE(0) |
+ SUN4I_TCON_GINT0_VBLANK_ENABLE(1);
+
+ if (enable)
+ val = mask;
+
+ regmap_update_bits(tcon->regs, SUN4I_TCON_GINT0_REG, mask, val);
+}
+EXPORT_SYMBOL(sun4i_tcon_enable_vblank);
+
+static int sun4i_tcon_get_clk_delay(struct drm_display_mode *mode,
+ int channel)
+{
+ int delay = mode->vtotal - mode->vdisplay;
+
+ if (mode->flags & DRM_MODE_FLAG_INTERLACE)
+ delay /= 2;
+
+ if (channel == 1)
+ delay -= 2;
+
+ delay = min(delay, 30);
+
+ DRM_DEBUG_DRIVER("TCON %d clock delay %u\n", channel, delay);
+
+ return delay;
+}
+
+void sun4i_tcon0_mode_set(struct sun4i_tcon *tcon,
+ struct drm_display_mode *mode)
+{
+ unsigned int bp, hsync, vsync;
+ u8 clk_delay;
+ u32 val = 0;
+
+ /* Adjust clock delay */
+ clk_delay = sun4i_tcon_get_clk_delay(mode, 0);
+ regmap_update_bits(tcon->regs, SUN4I_TCON0_CTL_REG,
+ SUN4I_TCON0_CTL_CLK_DELAY_MASK,
+ SUN4I_TCON0_CTL_CLK_DELAY(clk_delay));
+
+ /* Set the resolution */
+ regmap_write(tcon->regs, SUN4I_TCON0_BASIC0_REG,
+ SUN4I_TCON0_BASIC0_X(mode->crtc_hdisplay) |
+ SUN4I_TCON0_BASIC0_Y(mode->crtc_vdisplay));
+
+ /*
+ * This is called a backporch in the register documentation,
+ * but it really is the front porch + hsync
+ */
+ bp = mode->crtc_htotal - mode->crtc_hsync_start;
+ DRM_DEBUG_DRIVER("Setting horizontal total %d, backporch %d\n",
+ mode->crtc_htotal, bp);
+
+ /* Set horizontal display timings */
+ regmap_write(tcon->regs, SUN4I_TCON0_BASIC1_REG,
+ SUN4I_TCON0_BASIC1_H_TOTAL(mode->crtc_htotal) |
+ SUN4I_TCON0_BASIC1_H_BACKPORCH(bp));
+
+ /*
+ * This is called a backporch in the register documentation,
+ * but it really is the front porch + hsync
+ */
+ bp = mode->crtc_vtotal - mode->crtc_vsync_start;
+ DRM_DEBUG_DRIVER("Setting vertical total %d, backporch %d\n",
+ mode->crtc_vtotal, bp);
+
+ /* Set vertical display timings */
+ regmap_write(tcon->regs, SUN4I_TCON0_BASIC2_REG,
+ SUN4I_TCON0_BASIC2_V_TOTAL(mode->crtc_vtotal) |
+ SUN4I_TCON0_BASIC2_V_BACKPORCH(bp));
+
+ /* Set Hsync and Vsync length */
+ hsync = mode->crtc_hsync_end - mode->crtc_hsync_start;
+ vsync = mode->crtc_vsync_end - mode->crtc_vsync_start;
+ DRM_DEBUG_DRIVER("Setting HSYNC %d, VSYNC %d\n", hsync, vsync);
+ regmap_write(tcon->regs, SUN4I_TCON0_BASIC3_REG,
+ SUN4I_TCON0_BASIC3_V_SYNC(vsync) |
+ SUN4I_TCON0_BASIC3_H_SYNC(hsync));
+
+ /* Setup the polarity of the various signals */
+ if (!(mode->flags & DRM_MODE_FLAG_PHSYNC))
+ val |= SUN4I_TCON0_IO_POL_HSYNC_POSITIVE;
+
+ if (!(mode->flags & DRM_MODE_FLAG_PVSYNC))
+ val |= SUN4I_TCON0_IO_POL_VSYNC_POSITIVE;
+
+ regmap_update_bits(tcon->regs, SUN4I_TCON0_IO_POL_REG,
+ SUN4I_TCON0_IO_POL_HSYNC_POSITIVE | SUN4I_TCON0_IO_POL_VSYNC_POSITIVE,
+ val);
+
+ /* Map output pins to channel 0 */
+ regmap_update_bits(tcon->regs, SUN4I_TCON_GCTL_REG,
+ SUN4I_TCON_GCTL_IOMAP_MASK,
+ SUN4I_TCON_GCTL_IOMAP_TCON0);
+
+ /* Enable the output on the pins */
+ regmap_write(tcon->regs, SUN4I_TCON0_IO_TRI_REG, 0);
+}
+EXPORT_SYMBOL(sun4i_tcon0_mode_set);
+
+void sun4i_tcon1_mode_set(struct sun4i_tcon *tcon,
+ struct drm_display_mode *mode)
+{
+ unsigned int bp, hsync, vsync;
+ u8 clk_delay;
+ u32 val;
+
+ /* Adjust clock delay */
+ clk_delay = sun4i_tcon_get_clk_delay(mode, 1);
+ regmap_update_bits(tcon->regs, SUN4I_TCON1_CTL_REG,
+ SUN4I_TCON1_CTL_CLK_DELAY_MASK,
+ SUN4I_TCON1_CTL_CLK_DELAY(clk_delay));
+
+ /* Set interlaced mode */
+ if (mode->flags & DRM_MODE_FLAG_INTERLACE)
+ val = SUN4I_TCON1_CTL_INTERLACE_ENABLE;
+ else
+ val = 0;
+ regmap_update_bits(tcon->regs, SUN4I_TCON1_CTL_REG,
+ SUN4I_TCON1_CTL_INTERLACE_ENABLE,
+ val);
+
+ /* Set the input resolution */
+ regmap_write(tcon->regs, SUN4I_TCON1_BASIC0_REG,
+ SUN4I_TCON1_BASIC0_X(mode->crtc_hdisplay) |
+ SUN4I_TCON1_BASIC0_Y(mode->crtc_vdisplay));
+
+ /* Set the upscaling resolution */
+ regmap_write(tcon->regs, SUN4I_TCON1_BASIC1_REG,
+ SUN4I_TCON1_BASIC1_X(mode->crtc_hdisplay) |
+ SUN4I_TCON1_BASIC1_Y(mode->crtc_vdisplay));
+
+ /* Set the output resolution */
+ regmap_write(tcon->regs, SUN4I_TCON1_BASIC2_REG,
+ SUN4I_TCON1_BASIC2_X(mode->crtc_hdisplay) |
+ SUN4I_TCON1_BASIC2_Y(mode->crtc_vdisplay));
+
+ /* Set horizontal display timings */
+ bp = mode->crtc_htotal - mode->crtc_hsync_end;
+ DRM_DEBUG_DRIVER("Setting horizontal total %d, backporch %d\n",
+ mode->htotal, bp);
+ regmap_write(tcon->regs, SUN4I_TCON1_BASIC3_REG,
+ SUN4I_TCON1_BASIC3_H_TOTAL(mode->crtc_htotal) |
+ SUN4I_TCON1_BASIC3_H_BACKPORCH(bp));
+
+ /* Set vertical display timings */
+ bp = mode->crtc_vtotal - mode->crtc_vsync_end;
+ DRM_DEBUG_DRIVER("Setting vertical total %d, backporch %d\n",
+ mode->vtotal, bp);
+ regmap_write(tcon->regs, SUN4I_TCON1_BASIC4_REG,
+ SUN4I_TCON1_BASIC4_V_TOTAL(mode->vtotal) |
+ SUN4I_TCON1_BASIC4_V_BACKPORCH(bp));
+
+ /* Set Hsync and Vsync length */
+ hsync = mode->crtc_hsync_end - mode->crtc_hsync_start;
+ vsync = mode->crtc_vsync_end - mode->crtc_vsync_start;
+ DRM_DEBUG_DRIVER("Setting HSYNC %d, VSYNC %d\n", hsync, vsync);
+ regmap_write(tcon->regs, SUN4I_TCON1_BASIC5_REG,
+ SUN4I_TCON1_BASIC5_V_SYNC(vsync) |
+ SUN4I_TCON1_BASIC5_H_SYNC(hsync));
+
+ /* Map output pins to channel 1 */
+ regmap_update_bits(tcon->regs, SUN4I_TCON_GCTL_REG,
+ SUN4I_TCON_GCTL_IOMAP_MASK,
+ SUN4I_TCON_GCTL_IOMAP_TCON1);
+
+ /*
+ * FIXME: Undocumented bits
+ */
+ if (tcon->has_mux)
+ regmap_write(tcon->regs, SUN4I_TCON_MUX_CTRL_REG, 1);
+}
+EXPORT_SYMBOL(sun4i_tcon1_mode_set);
+
+static void sun4i_tcon_finish_page_flip(struct drm_device *dev,
+ struct sun4i_crtc *scrtc)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&dev->event_lock, flags);
+ if (scrtc->event) {
+ drm_crtc_send_vblank_event(&scrtc->crtc, scrtc->event);
+ drm_crtc_vblank_put(&scrtc->crtc);
+ scrtc->event = NULL;
+ }
+ spin_unlock_irqrestore(&dev->event_lock, flags);
+}
+
+static irqreturn_t sun4i_tcon_handler(int irq, void *private)
+{
+ struct sun4i_tcon *tcon = private;
+ struct drm_device *drm = tcon->drm;
+ struct sun4i_drv *drv = drm->dev_private;
+ struct sun4i_crtc *scrtc = drv->crtc;
+ unsigned int status;
+
+ regmap_read(tcon->regs, SUN4I_TCON_GINT0_REG, &status);
+
+ if (!(status & (SUN4I_TCON_GINT0_VBLANK_INT(0) |
+ SUN4I_TCON_GINT0_VBLANK_INT(1))))
+ return IRQ_NONE;
+
+ drm_crtc_handle_vblank(&scrtc->crtc);
+ sun4i_tcon_finish_page_flip(drm, scrtc);
+
+ /* Acknowledge the interrupt */
+ regmap_update_bits(tcon->regs, SUN4I_TCON_GINT0_REG,
+ SUN4I_TCON_GINT0_VBLANK_INT(0) |
+ SUN4I_TCON_GINT0_VBLANK_INT(1),
+ 0);
+
+ return IRQ_HANDLED;
+}
+
+static int sun4i_tcon_init_clocks(struct device *dev,
+ struct sun4i_tcon *tcon)
+{
+ tcon->clk = devm_clk_get(dev, "ahb");
+ if (IS_ERR(tcon->clk)) {
+ dev_err(dev, "Couldn't get the TCON bus clock\n");
+ return PTR_ERR(tcon->clk);
+ }
+ clk_prepare_enable(tcon->clk);
+
+ tcon->sclk0 = devm_clk_get(dev, "tcon-ch0");
+ if (IS_ERR(tcon->sclk0)) {
+ dev_err(dev, "Couldn't get the TCON channel 0 clock\n");
+ return PTR_ERR(tcon->sclk0);
+ }
+
+ tcon->sclk1 = devm_clk_get(dev, "tcon-ch1");
+ if (IS_ERR(tcon->sclk1)) {
+ dev_err(dev, "Couldn't get the TCON channel 1 clock\n");
+ return PTR_ERR(tcon->sclk1);
+ }
+
+ return sun4i_dclk_create(dev, tcon);
+}
+
+static void sun4i_tcon_free_clocks(struct sun4i_tcon *tcon)
+{
+ sun4i_dclk_free(tcon);
+ clk_disable_unprepare(tcon->clk);
+}
+
+static int sun4i_tcon_init_irq(struct device *dev,
+ struct sun4i_tcon *tcon)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ int irq, ret;
+
+ irq = platform_get_irq(pdev, 0);
+ if (irq < 0) {
+ dev_err(dev, "Couldn't retrieve the TCON interrupt\n");
+ return irq;
+ }
+
+ ret = devm_request_irq(dev, irq, sun4i_tcon_handler, 0,
+ dev_name(dev), tcon);
+ if (ret) {
+ dev_err(dev, "Couldn't request the IRQ\n");
+ return ret;
+ }
+
+ return 0;
+}
+
+static struct regmap_config sun4i_tcon_regmap_config = {
+ .reg_bits = 32,
+ .val_bits = 32,
+ .reg_stride = 4,
+ .max_register = 0x800,
+};
+
+static int sun4i_tcon_init_regmap(struct device *dev,
+ struct sun4i_tcon *tcon)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ struct resource *res;
+ void __iomem *regs;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ regs = devm_ioremap_resource(dev, res);
+ if (IS_ERR(regs)) {
+ dev_err(dev, "Couldn't map the TCON registers\n");
+ return PTR_ERR(regs);
+ }
+
+ tcon->regs = devm_regmap_init_mmio(dev, regs,
+ &sun4i_tcon_regmap_config);
+ if (IS_ERR(tcon->regs)) {
+ dev_err(dev, "Couldn't create the TCON regmap\n");
+ return PTR_ERR(tcon->regs);
+ }
+
+ /* Make sure the TCON is disabled and all IRQs are off */
+ regmap_write(tcon->regs, SUN4I_TCON_GCTL_REG, 0);
+ regmap_write(tcon->regs, SUN4I_TCON_GINT0_REG, 0);
+ regmap_write(tcon->regs, SUN4I_TCON_GINT1_REG, 0);
+
+ /* Disable IO lines and set them to tristate */
+ regmap_write(tcon->regs, SUN4I_TCON0_IO_TRI_REG, ~0);
+ regmap_write(tcon->regs, SUN4I_TCON1_IO_TRI_REG, ~0);
+
+ return 0;
+}
+
+static int sun4i_tcon_bind(struct device *dev, struct device *master,
+ void *data)
+{
+ struct drm_device *drm = data;
+ struct sun4i_drv *drv = drm->dev_private;
+ struct sun4i_tcon *tcon;
+ int ret;
+
+ tcon = devm_kzalloc(dev, sizeof(*tcon), GFP_KERNEL);
+ if (!tcon)
+ return -ENOMEM;
+ dev_set_drvdata(dev, tcon);
+ drv->tcon = tcon;
+ tcon->drm = drm;
+
+ if (of_device_is_compatible(dev->of_node, "allwinner,sun5i-a13-tcon"))
+ tcon->has_mux = true;
+
+ tcon->lcd_rst = devm_reset_control_get(dev, "lcd");
+ if (IS_ERR(tcon->lcd_rst)) {
+ dev_err(dev, "Couldn't get our reset line\n");
+ return PTR_ERR(tcon->lcd_rst);
+ }
+
+ /* Make sure our TCON is reset */
+ if (!reset_control_status(tcon->lcd_rst))
+ reset_control_assert(tcon->lcd_rst);
+
+ ret = reset_control_deassert(tcon->lcd_rst);
+ if (ret) {
+ dev_err(dev, "Couldn't deassert our reset line\n");
+ return ret;
+ }
+
+ ret = sun4i_tcon_init_regmap(dev, tcon);
+ if (ret) {
+ dev_err(dev, "Couldn't init our TCON regmap\n");
+ goto err_assert_reset;
+ }
+
+ ret = sun4i_tcon_init_clocks(dev, tcon);
+ if (ret) {
+ dev_err(dev, "Couldn't init our TCON clocks\n");
+ goto err_assert_reset;
+ }
+
+ ret = sun4i_tcon_init_irq(dev, tcon);
+ if (ret) {
+ dev_err(dev, "Couldn't init our TCON interrupts\n");
+ goto err_free_clocks;
+ }
+
+ return 0;
+
+err_free_clocks:
+ sun4i_tcon_free_clocks(tcon);
+err_assert_reset:
+ reset_control_assert(tcon->lcd_rst);
+ return ret;
+}
+
+static void sun4i_tcon_unbind(struct device *dev, struct device *master,
+ void *data)
+{
+ struct sun4i_tcon *tcon = dev_get_drvdata(dev);
+
+ sun4i_tcon_free_clocks(tcon);
+}
+
+static struct component_ops sun4i_tcon_ops = {
+ .bind = sun4i_tcon_bind,
+ .unbind = sun4i_tcon_unbind,
+};
+
+static int sun4i_tcon_probe(struct platform_device *pdev)
+{
+ return component_add(&pdev->dev, &sun4i_tcon_ops);
+}
+
+static int sun4i_tcon_remove(struct platform_device *pdev)
+{
+ component_del(&pdev->dev, &sun4i_tcon_ops);
+
+ return 0;
+}
+
+static const struct of_device_id sun4i_tcon_of_table[] = {
+ { .compatible = "allwinner,sun5i-a13-tcon" },
+ { }
+};
+MODULE_DEVICE_TABLE(of, sun4i_tcon_of_table);
+
+static struct platform_driver sun4i_tcon_platform_driver = {
+ .probe = sun4i_tcon_probe,
+ .remove = sun4i_tcon_remove,
+ .driver = {
+ .name = "sun4i-tcon",
+ .of_match_table = sun4i_tcon_of_table,
+ },
+};
+module_platform_driver(sun4i_tcon_platform_driver);
+
+MODULE_AUTHOR("Maxime Ripard <maxime.ripard@free-electrons.com>");
+MODULE_DESCRIPTION("Allwinner A10 Timing Controller Driver");
+MODULE_LICENSE("GPL");
--- /dev/null
+/*
+ * Copyright (C) 2015 Free Electrons
+ * Copyright (C) 2015 NextThing Co
+ *
+ * Boris Brezillon <boris.brezillon@free-electrons.com>
+ * Maxime Ripard <maxime.ripard@free-electrons.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ */
+
+#ifndef __SUN4I_TCON_H__
+#define __SUN4I_TCON_H__
+
+#include <drm/drm_crtc.h>
+
+#include <linux/kernel.h>
+#include <linux/reset.h>
+
+#define SUN4I_TCON_GCTL_REG 0x0
+#define SUN4I_TCON_GCTL_TCON_ENABLE BIT(31)
+#define SUN4I_TCON_GCTL_IOMAP_MASK BIT(0)
+#define SUN4I_TCON_GCTL_IOMAP_TCON1 (1 << 0)
+#define SUN4I_TCON_GCTL_IOMAP_TCON0 (0 << 0)
+
+#define SUN4I_TCON_GINT0_REG 0x4
+#define SUN4I_TCON_GINT0_VBLANK_ENABLE(pipe) BIT(31 - (pipe))
+#define SUN4I_TCON_GINT0_VBLANK_INT(pipe) BIT(15 - (pipe))
+
+#define SUN4I_TCON_GINT1_REG 0x8
+#define SUN4I_TCON_FRM_CTL_REG 0x10
+
+#define SUN4I_TCON0_CTL_REG 0x40
+#define SUN4I_TCON0_CTL_TCON_ENABLE BIT(31)
+#define SUN4I_TCON0_CTL_CLK_DELAY_MASK GENMASK(8, 4)
+#define SUN4I_TCON0_CTL_CLK_DELAY(delay) ((delay << 4) & SUN4I_TCON0_CTL_CLK_DELAY_MASK)
+
+#define SUN4I_TCON0_DCLK_REG 0x44
+#define SUN4I_TCON0_DCLK_GATE_BIT (31)
+#define SUN4I_TCON0_DCLK_DIV_SHIFT (0)
+#define SUN4I_TCON0_DCLK_DIV_WIDTH (7)
+
+#define SUN4I_TCON0_BASIC0_REG 0x48
+#define SUN4I_TCON0_BASIC0_X(width) ((((width) - 1) & 0xfff) << 16)
+#define SUN4I_TCON0_BASIC0_Y(height) (((height) - 1) & 0xfff)
+
+#define SUN4I_TCON0_BASIC1_REG 0x4c
+#define SUN4I_TCON0_BASIC1_H_TOTAL(total) ((((total) - 1) & 0x1fff) << 16)
+#define SUN4I_TCON0_BASIC1_H_BACKPORCH(bp) (((bp) - 1) & 0xfff)
+
+#define SUN4I_TCON0_BASIC2_REG 0x50
+#define SUN4I_TCON0_BASIC2_V_TOTAL(total) ((((total) * 2) & 0x1fff) << 16)
+#define SUN4I_TCON0_BASIC2_V_BACKPORCH(bp) (((bp) - 1) & 0xfff)
+
+#define SUN4I_TCON0_BASIC3_REG 0x54
+#define SUN4I_TCON0_BASIC3_H_SYNC(width) ((((width) - 1) & 0x7ff) << 16)
+#define SUN4I_TCON0_BASIC3_V_SYNC(height) (((height) - 1) & 0x7ff)
+
+#define SUN4I_TCON0_HV_IF_REG 0x58
+#define SUN4I_TCON0_CPU_IF_REG 0x60
+#define SUN4I_TCON0_CPU_WR_REG 0x64
+#define SUN4I_TCON0_CPU_RD0_REG 0x68
+#define SUN4I_TCON0_CPU_RDA_REG 0x6c
+#define SUN4I_TCON0_TTL0_REG 0x70
+#define SUN4I_TCON0_TTL1_REG 0x74
+#define SUN4I_TCON0_TTL2_REG 0x78
+#define SUN4I_TCON0_TTL3_REG 0x7c
+#define SUN4I_TCON0_TTL4_REG 0x80
+#define SUN4I_TCON0_LVDS_IF_REG 0x84
+#define SUN4I_TCON0_IO_POL_REG 0x88
+#define SUN4I_TCON0_IO_POL_DCLK_PHASE(phase) ((phase & 3) << 28)
+#define SUN4I_TCON0_IO_POL_HSYNC_POSITIVE BIT(25)
+#define SUN4I_TCON0_IO_POL_VSYNC_POSITIVE BIT(24)
+
+#define SUN4I_TCON0_IO_TRI_REG 0x8c
+#define SUN4I_TCON0_IO_TRI_HSYNC_DISABLE BIT(25)
+#define SUN4I_TCON0_IO_TRI_VSYNC_DISABLE BIT(24)
+#define SUN4I_TCON0_IO_TRI_DATA_PINS_DISABLE(pins) GENMASK(pins, 0)
+
+#define SUN4I_TCON1_CTL_REG 0x90
+#define SUN4I_TCON1_CTL_TCON_ENABLE BIT(31)
+#define SUN4I_TCON1_CTL_INTERLACE_ENABLE BIT(20)
+#define SUN4I_TCON1_CTL_CLK_DELAY_MASK GENMASK(8, 4)
+#define SUN4I_TCON1_CTL_CLK_DELAY(delay) ((delay << 4) & SUN4I_TCON1_CTL_CLK_DELAY_MASK)
+
+#define SUN4I_TCON1_BASIC0_REG 0x94
+#define SUN4I_TCON1_BASIC0_X(width) ((((width) - 1) & 0xfff) << 16)
+#define SUN4I_TCON1_BASIC0_Y(height) (((height) - 1) & 0xfff)
+
+#define SUN4I_TCON1_BASIC1_REG 0x98
+#define SUN4I_TCON1_BASIC1_X(width) ((((width) - 1) & 0xfff) << 16)
+#define SUN4I_TCON1_BASIC1_Y(height) (((height) - 1) & 0xfff)
+
+#define SUN4I_TCON1_BASIC2_REG 0x9c
+#define SUN4I_TCON1_BASIC2_X(width) ((((width) - 1) & 0xfff) << 16)
+#define SUN4I_TCON1_BASIC2_Y(height) (((height) - 1) & 0xfff)
+
+#define SUN4I_TCON1_BASIC3_REG 0xa0
+#define SUN4I_TCON1_BASIC3_H_TOTAL(total) ((((total) - 1) & 0x1fff) << 16)
+#define SUN4I_TCON1_BASIC3_H_BACKPORCH(bp) (((bp) - 1) & 0xfff)
+
+#define SUN4I_TCON1_BASIC4_REG 0xa4
+#define SUN4I_TCON1_BASIC4_V_TOTAL(total) (((total) & 0x1fff) << 16)
+#define SUN4I_TCON1_BASIC4_V_BACKPORCH(bp) (((bp) - 1) & 0xfff)
+
+#define SUN4I_TCON1_BASIC5_REG 0xa8
+#define SUN4I_TCON1_BASIC5_H_SYNC(width) ((((width) - 1) & 0x3ff) << 16)
+#define SUN4I_TCON1_BASIC5_V_SYNC(height) (((height) - 1) & 0x3ff)
+
+#define SUN4I_TCON1_IO_POL_REG 0xf0
+#define SUN4I_TCON1_IO_TRI_REG 0xf4
+#define SUN4I_TCON_CEU_CTL_REG 0x100
+#define SUN4I_TCON_CEU_MUL_RR_REG 0x110
+#define SUN4I_TCON_CEU_MUL_RG_REG 0x114
+#define SUN4I_TCON_CEU_MUL_RB_REG 0x118
+#define SUN4I_TCON_CEU_ADD_RC_REG 0x11c
+#define SUN4I_TCON_CEU_MUL_GR_REG 0x120
+#define SUN4I_TCON_CEU_MUL_GG_REG 0x124
+#define SUN4I_TCON_CEU_MUL_GB_REG 0x128
+#define SUN4I_TCON_CEU_ADD_GC_REG 0x12c
+#define SUN4I_TCON_CEU_MUL_BR_REG 0x130
+#define SUN4I_TCON_CEU_MUL_BG_REG 0x134
+#define SUN4I_TCON_CEU_MUL_BB_REG 0x138
+#define SUN4I_TCON_CEU_ADD_BC_REG 0x13c
+#define SUN4I_TCON_CEU_RANGE_R_REG 0x140
+#define SUN4I_TCON_CEU_RANGE_G_REG 0x144
+#define SUN4I_TCON_CEU_RANGE_B_REG 0x148
+#define SUN4I_TCON_MUX_CTRL_REG 0x200
+#define SUN4I_TCON1_FILL_CTL_REG 0x300
+#define SUN4I_TCON1_FILL_BEG0_REG 0x304
+#define SUN4I_TCON1_FILL_END0_REG 0x308
+#define SUN4I_TCON1_FILL_DATA0_REG 0x30c
+#define SUN4I_TCON1_FILL_BEG1_REG 0x310
+#define SUN4I_TCON1_FILL_END1_REG 0x314
+#define SUN4I_TCON1_FILL_DATA1_REG 0x318
+#define SUN4I_TCON1_FILL_BEG2_REG 0x31c
+#define SUN4I_TCON1_FILL_END2_REG 0x320
+#define SUN4I_TCON1_FILL_DATA2_REG 0x324
+#define SUN4I_TCON1_GAMMA_TABLE_REG 0x400
+
+#define SUN4I_TCON_MAX_CHANNELS 2
+
+struct sun4i_tcon {
+ struct drm_device *drm;
+ struct regmap *regs;
+
+ /* Main bus clock */
+ struct clk *clk;
+
+ /* Clocks for the TCON channels */
+ struct clk *sclk0;
+ struct clk *sclk1;
+
+ /* Pixel clock */
+ struct clk *dclk;
+
+ /* Reset control */
+ struct reset_control *lcd_rst;
+
+ /* Platform adjustments */
+ bool has_mux;
+};
+
+/* Global Control */
+void sun4i_tcon_disable(struct sun4i_tcon *tcon);
+void sun4i_tcon_enable(struct sun4i_tcon *tcon);
+
+/* Channel Control */
+void sun4i_tcon_channel_disable(struct sun4i_tcon *tcon, int channel);
+void sun4i_tcon_channel_enable(struct sun4i_tcon *tcon, int channel);
+
+void sun4i_tcon_enable_vblank(struct sun4i_tcon *tcon, bool enable);
+
+/* Mode Related Controls */
+void sun4i_tcon_switch_interlace(struct sun4i_tcon *tcon,
+ bool enable);
+void sun4i_tcon0_mode_set(struct sun4i_tcon *tcon,
+ struct drm_display_mode *mode);
+void sun4i_tcon1_mode_set(struct sun4i_tcon *tcon,
+ struct drm_display_mode *mode);
+
+#endif /* __SUN4I_TCON_H__ */
projects / platform / kernel / linux-rpi3.git / commitdiff