--- /dev/null
+/*
+ * Copyright (C) 2016 Maxime Ripard
+ *
+ * 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_HDMI_H_
+#define _SUN4I_HDMI_H_
+
+#include <drm/drm_connector.h>
+#include <drm/drm_encoder.h>
+
+#define SUN4I_HDMI_CTRL_REG 0x004
+#define SUN4I_HDMI_CTRL_ENABLE BIT(31)
+
+#define SUN4I_HDMI_IRQ_REG 0x008
+#define SUN4I_HDMI_IRQ_STA_MASK 0x73
+#define SUN4I_HDMI_IRQ_STA_FIFO_OF BIT(1)
+#define SUN4I_HDMI_IRQ_STA_FIFO_UF BIT(0)
+
+#define SUN4I_HDMI_HPD_REG 0x00c
+#define SUN4I_HDMI_HPD_HIGH BIT(0)
+
+#define SUN4I_HDMI_VID_CTRL_REG 0x010
+#define SUN4I_HDMI_VID_CTRL_ENABLE BIT(31)
+#define SUN4I_HDMI_VID_CTRL_HDMI_MODE BIT(30)
+
+#define SUN4I_HDMI_VID_TIMING_ACT_REG 0x014
+#define SUN4I_HDMI_VID_TIMING_BP_REG 0x018
+#define SUN4I_HDMI_VID_TIMING_FP_REG 0x01c
+#define SUN4I_HDMI_VID_TIMING_SPW_REG 0x020
+
+#define SUN4I_HDMI_VID_TIMING_X(x) ((((x) - 1) & GENMASK(11, 0)))
+#define SUN4I_HDMI_VID_TIMING_Y(y) ((((y) - 1) & GENMASK(11, 0)) << 16)
+
+#define SUN4I_HDMI_VID_TIMING_POL_REG 0x024
+#define SUN4I_HDMI_VID_TIMING_POL_TX_CLK (0x3e0 << 16)
+#define SUN4I_HDMI_VID_TIMING_POL_VSYNC BIT(1)
+#define SUN4I_HDMI_VID_TIMING_POL_HSYNC BIT(0)
+
+#define SUN4I_HDMI_AVI_INFOFRAME_REG(n) (0x080 + (n))
+
+#define SUN4I_HDMI_PAD_CTRL0_REG 0x200
+#define SUN4I_HDMI_PAD_CTRL0_BIASEN BIT(31)
+#define SUN4I_HDMI_PAD_CTRL0_LDOCEN BIT(30)
+#define SUN4I_HDMI_PAD_CTRL0_LDODEN BIT(29)
+#define SUN4I_HDMI_PAD_CTRL0_PWENC BIT(28)
+#define SUN4I_HDMI_PAD_CTRL0_PWEND BIT(27)
+#define SUN4I_HDMI_PAD_CTRL0_PWENG BIT(26)
+#define SUN4I_HDMI_PAD_CTRL0_CKEN BIT(25)
+#define SUN4I_HDMI_PAD_CTRL0_TXEN BIT(23)
+
+#define SUN4I_HDMI_PAD_CTRL1_REG 0x204
+#define SUN4I_HDMI_PAD_CTRL1_AMP_OPT BIT(23)
+#define SUN4I_HDMI_PAD_CTRL1_AMPCK_OPT BIT(22)
+#define SUN4I_HDMI_PAD_CTRL1_EMP_OPT BIT(20)
+#define SUN4I_HDMI_PAD_CTRL1_EMPCK_OPT BIT(19)
+#define SUN4I_HDMI_PAD_CTRL1_REG_DEN BIT(15)
+#define SUN4I_HDMI_PAD_CTRL1_REG_DENCK BIT(14)
+#define SUN4I_HDMI_PAD_CTRL1_REG_EMP(n) (((n) & 7) << 10)
+#define SUN4I_HDMI_PAD_CTRL1_HALVE_CLK BIT(6)
+#define SUN4I_HDMI_PAD_CTRL1_REG_AMP(n) (((n) & 7) << 3)
+
+#define SUN4I_HDMI_PLL_CTRL_REG 0x208
+#define SUN4I_HDMI_PLL_CTRL_PLL_EN BIT(31)
+#define SUN4I_HDMI_PLL_CTRL_BWS BIT(30)
+#define SUN4I_HDMI_PLL_CTRL_HV_IS_33 BIT(29)
+#define SUN4I_HDMI_PLL_CTRL_LDO1_EN BIT(28)
+#define SUN4I_HDMI_PLL_CTRL_LDO2_EN BIT(27)
+#define SUN4I_HDMI_PLL_CTRL_SDIV2 BIT(25)
+#define SUN4I_HDMI_PLL_CTRL_VCO_GAIN(n) (((n) & 7) << 20)
+#define SUN4I_HDMI_PLL_CTRL_S(n) (((n) & 7) << 17)
+#define SUN4I_HDMI_PLL_CTRL_CP_S(n) (((n) & 0x1f) << 12)
+#define SUN4I_HDMI_PLL_CTRL_CS(n) (((n) & 0xf) << 8)
+#define SUN4I_HDMI_PLL_CTRL_DIV(n) (((n) & 0xf) << 4)
+#define SUN4I_HDMI_PLL_CTRL_DIV_MASK GENMASK(7, 4)
+#define SUN4I_HDMI_PLL_CTRL_VCO_S(n) ((n) & 0xf)
+
+#define SUN4I_HDMI_PLL_DBG0_REG 0x20c
+#define SUN4I_HDMI_PLL_DBG0_TMDS_PARENT(n) (((n) & 1) << 21)
+#define SUN4I_HDMI_PLL_DBG0_TMDS_PARENT_MASK BIT(21)
+#define SUN4I_HDMI_PLL_DBG0_TMDS_PARENT_SHIFT 21
+
+#define SUN4I_HDMI_PKT_CTRL_REG(n) (0x2f0 + (4 * (n)))
+#define SUN4I_HDMI_PKT_CTRL_TYPE(n, t) ((t) << (((n) % 4) * 4))
+
+#define SUN4I_HDMI_UNKNOWN_REG 0x300
+#define SUN4I_HDMI_UNKNOWN_INPUT_SYNC BIT(27)
+
+#define SUN4I_HDMI_DDC_CTRL_REG 0x500
+#define SUN4I_HDMI_DDC_CTRL_ENABLE BIT(31)
+#define SUN4I_HDMI_DDC_CTRL_START_CMD BIT(30)
+#define SUN4I_HDMI_DDC_CTRL_FIFO_DIR_MASK BIT(8)
+#define SUN4I_HDMI_DDC_CTRL_FIFO_DIR_READ (0 << 8)
+#define SUN4I_HDMI_DDC_CTRL_RESET BIT(0)
+
+#define SUN4I_HDMI_DDC_ADDR_REG 0x504
+#define SUN4I_HDMI_DDC_ADDR_SEGMENT(seg) (((seg) & 0xff) << 24)
+#define SUN4I_HDMI_DDC_ADDR_EDDC(addr) (((addr) & 0xff) << 16)
+#define SUN4I_HDMI_DDC_ADDR_OFFSET(off) (((off) & 0xff) << 8)
+#define SUN4I_HDMI_DDC_ADDR_SLAVE(addr) ((addr) & 0xff)
+
+#define SUN4I_HDMI_DDC_FIFO_CTRL_REG 0x510
+#define SUN4I_HDMI_DDC_FIFO_CTRL_CLEAR BIT(31)
+
+#define SUN4I_HDMI_DDC_FIFO_DATA_REG 0x518
+#define SUN4I_HDMI_DDC_BYTE_COUNT_REG 0x51c
+
+#define SUN4I_HDMI_DDC_CMD_REG 0x520
+#define SUN4I_HDMI_DDC_CMD_EXPLICIT_EDDC_READ 6
+
+#define SUN4I_HDMI_DDC_CLK_REG 0x528
+#define SUN4I_HDMI_DDC_CLK_M(m) (((m) & 0x7) << 3)
+#define SUN4I_HDMI_DDC_CLK_N(n) ((n) & 0x7)
+
+#define SUN4I_HDMI_DDC_LINE_CTRL_REG 0x540
+#define SUN4I_HDMI_DDC_LINE_CTRL_SDA_ENABLE BIT(9)
+#define SUN4I_HDMI_DDC_LINE_CTRL_SCL_ENABLE BIT(8)
+
+#define SUN4I_HDMI_DDC_FIFO_SIZE 16
+
+enum sun4i_hdmi_pkt_type {
+ SUN4I_HDMI_PKT_AVI = 2,
+ SUN4I_HDMI_PKT_END = 15,
+};
+
+struct sun4i_hdmi {
+ struct drm_connector connector;
+ struct drm_encoder encoder;
+ struct device *dev;
+
+ void __iomem *base;
+
+ /* Parent clocks */
+ struct clk *bus_clk;
+ struct clk *mod_clk;
+ struct clk *pll0_clk;
+ struct clk *pll1_clk;
+
+ /* And the clocks we create */
+ struct clk *ddc_clk;
+ struct clk *tmds_clk;
+
+ struct sun4i_drv *drv;
+
+ bool hdmi_monitor;
+};
+
+int sun4i_ddc_create(struct sun4i_hdmi *hdmi, struct clk *clk);
+int sun4i_tmds_create(struct sun4i_hdmi *hdmi);
+
+#endif /* _SUN4I_HDMI_H_ */
--- /dev/null
+/*
+ * Copyright (C) 2016 Maxime Ripard
+ *
+ * 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_helper.h>
+#include <drm/drm_edid.h>
+#include <drm/drm_encoder.h>
+#include <drm/drm_of.h>
+#include <drm/drm_panel.h>
+
+#include <linux/clk.h>
+#include <linux/component.h>
+#include <linux/iopoll.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+
+#include "sun4i_backend.h"
+#include "sun4i_crtc.h"
+#include "sun4i_drv.h"
+#include "sun4i_hdmi.h"
+#include "sun4i_tcon.h"
+
+#define DDC_SEGMENT_ADDR 0x30
+
+static inline struct sun4i_hdmi *
+drm_encoder_to_sun4i_hdmi(struct drm_encoder *encoder)
+{
+ return container_of(encoder, struct sun4i_hdmi,
+ encoder);
+}
+
+static inline struct sun4i_hdmi *
+drm_connector_to_sun4i_hdmi(struct drm_connector *connector)
+{
+ return container_of(connector, struct sun4i_hdmi,
+ connector);
+}
+
+static int sun4i_hdmi_setup_avi_infoframes(struct sun4i_hdmi *hdmi,
+ struct drm_display_mode *mode)
+{
+ struct hdmi_avi_infoframe frame;
+ u8 buffer[17];
+ int i, ret;
+
+ ret = drm_hdmi_avi_infoframe_from_display_mode(&frame, mode);
+ if (ret < 0) {
+ DRM_ERROR("Failed to get infoframes from mode\n");
+ return ret;
+ }
+
+ ret = hdmi_avi_infoframe_pack(&frame, buffer, sizeof(buffer));
+ if (ret < 0) {
+ DRM_ERROR("Failed to pack infoframes\n");
+ return ret;
+ }
+
+ for (i = 0; i < sizeof(buffer); i++)
+ writeb(buffer[i], hdmi->base + SUN4I_HDMI_AVI_INFOFRAME_REG(i));
+
+ return 0;
+}
+
+static int sun4i_hdmi_atomic_check(struct drm_encoder *encoder,
+ struct drm_crtc_state *crtc_state,
+ struct drm_connector_state *conn_state)
+{
+ struct drm_display_mode *mode = &crtc_state->mode;
+
+ if (mode->flags & DRM_MODE_FLAG_DBLCLK)
+ return -EINVAL;
+
+ return 0;
+}
+
+static void sun4i_hdmi_disable(struct drm_encoder *encoder)
+{
+ struct sun4i_hdmi *hdmi = drm_encoder_to_sun4i_hdmi(encoder);
+ struct sun4i_crtc *crtc = drm_crtc_to_sun4i_crtc(encoder->crtc);
+ struct sun4i_tcon *tcon = crtc->tcon;
+ u32 val;
+
+ DRM_DEBUG_DRIVER("Disabling the HDMI Output\n");
+
+ val = readl(hdmi->base + SUN4I_HDMI_VID_CTRL_REG);
+ val &= ~SUN4I_HDMI_VID_CTRL_ENABLE;
+ writel(val, hdmi->base + SUN4I_HDMI_VID_CTRL_REG);
+
+ sun4i_tcon_channel_disable(tcon, 1);
+}
+
+static void sun4i_hdmi_enable(struct drm_encoder *encoder)
+{
+ struct drm_display_mode *mode = &encoder->crtc->state->adjusted_mode;
+ struct sun4i_hdmi *hdmi = drm_encoder_to_sun4i_hdmi(encoder);
+ struct sun4i_crtc *crtc = drm_crtc_to_sun4i_crtc(encoder->crtc);
+ struct sun4i_tcon *tcon = crtc->tcon;
+ u32 val = 0;
+
+ DRM_DEBUG_DRIVER("Enabling the HDMI Output\n");
+
+ sun4i_tcon_channel_enable(tcon, 1);
+
+ sun4i_hdmi_setup_avi_infoframes(hdmi, mode);
+ val |= SUN4I_HDMI_PKT_CTRL_TYPE(0, SUN4I_HDMI_PKT_AVI);
+ val |= SUN4I_HDMI_PKT_CTRL_TYPE(1, SUN4I_HDMI_PKT_END);
+ writel(val, hdmi->base + SUN4I_HDMI_PKT_CTRL_REG(0));
+
+ val = SUN4I_HDMI_VID_CTRL_ENABLE;
+ if (hdmi->hdmi_monitor)
+ val |= SUN4I_HDMI_VID_CTRL_HDMI_MODE;
+
+ writel(val, hdmi->base + SUN4I_HDMI_VID_CTRL_REG);
+}
+
+static void sun4i_hdmi_mode_set(struct drm_encoder *encoder,
+ struct drm_display_mode *mode,
+ struct drm_display_mode *adjusted_mode)
+{
+ struct sun4i_hdmi *hdmi = drm_encoder_to_sun4i_hdmi(encoder);
+ struct sun4i_crtc *crtc = drm_crtc_to_sun4i_crtc(encoder->crtc);
+ struct sun4i_tcon *tcon = crtc->tcon;
+ unsigned int x, y;
+ u32 val;
+
+ sun4i_tcon1_mode_set(tcon, mode);
+ sun4i_tcon_set_mux(tcon, 1, encoder);
+
+ clk_set_rate(tcon->sclk1, mode->crtc_clock * 1000);
+ clk_set_rate(hdmi->mod_clk, mode->crtc_clock * 1000);
+ clk_set_rate(hdmi->tmds_clk, mode->crtc_clock * 1000);
+
+ /* Set input sync enable */
+ writel(SUN4I_HDMI_UNKNOWN_INPUT_SYNC,
+ hdmi->base + SUN4I_HDMI_UNKNOWN_REG);
+
+ /* Setup timing registers */
+ writel(SUN4I_HDMI_VID_TIMING_X(mode->hdisplay) |
+ SUN4I_HDMI_VID_TIMING_Y(mode->vdisplay),
+ hdmi->base + SUN4I_HDMI_VID_TIMING_ACT_REG);
+
+ x = mode->htotal - mode->hsync_start;
+ y = mode->vtotal - mode->vsync_start;
+ writel(SUN4I_HDMI_VID_TIMING_X(x) | SUN4I_HDMI_VID_TIMING_Y(y),
+ hdmi->base + SUN4I_HDMI_VID_TIMING_BP_REG);
+
+ x = mode->hsync_start - mode->hdisplay;
+ y = mode->vsync_start - mode->vdisplay;
+ writel(SUN4I_HDMI_VID_TIMING_X(x) | SUN4I_HDMI_VID_TIMING_Y(y),
+ hdmi->base + SUN4I_HDMI_VID_TIMING_FP_REG);
+
+ x = mode->hsync_end - mode->hsync_start;
+ y = mode->vsync_end - mode->vsync_start;
+ writel(SUN4I_HDMI_VID_TIMING_X(x) | SUN4I_HDMI_VID_TIMING_Y(y),
+ hdmi->base + SUN4I_HDMI_VID_TIMING_SPW_REG);
+
+ val = SUN4I_HDMI_VID_TIMING_POL_TX_CLK;
+ if (mode->flags & DRM_MODE_FLAG_PHSYNC)
+ val |= SUN4I_HDMI_VID_TIMING_POL_HSYNC;
+
+ if (mode->flags & DRM_MODE_FLAG_PVSYNC)
+ val |= SUN4I_HDMI_VID_TIMING_POL_VSYNC;
+
+ writel(val, hdmi->base + SUN4I_HDMI_VID_TIMING_POL_REG);
+}
+
+static const struct drm_encoder_helper_funcs sun4i_hdmi_helper_funcs = {
+ .atomic_check = sun4i_hdmi_atomic_check,
+ .disable = sun4i_hdmi_disable,
+ .enable = sun4i_hdmi_enable,
+ .mode_set = sun4i_hdmi_mode_set,
+};
+
+static const struct drm_encoder_funcs sun4i_hdmi_funcs = {
+ .destroy = drm_encoder_cleanup,
+};
+
+static int sun4i_hdmi_read_sub_block(struct sun4i_hdmi *hdmi,
+ unsigned int blk, unsigned int offset,
+ u8 *buf, unsigned int count)
+{
+ unsigned long reg;
+ int i;
+
+ reg = readl(hdmi->base + SUN4I_HDMI_DDC_CTRL_REG);
+ reg &= ~SUN4I_HDMI_DDC_CTRL_FIFO_DIR_MASK;
+ writel(reg | SUN4I_HDMI_DDC_CTRL_FIFO_DIR_READ,
+ hdmi->base + SUN4I_HDMI_DDC_CTRL_REG);
+
+ writel(SUN4I_HDMI_DDC_ADDR_SEGMENT(offset >> 8) |
+ SUN4I_HDMI_DDC_ADDR_EDDC(DDC_SEGMENT_ADDR << 1) |
+ SUN4I_HDMI_DDC_ADDR_OFFSET(offset) |
+ SUN4I_HDMI_DDC_ADDR_SLAVE(DDC_ADDR),
+ hdmi->base + SUN4I_HDMI_DDC_ADDR_REG);
+
+ reg = readl(hdmi->base + SUN4I_HDMI_DDC_FIFO_CTRL_REG);
+ writel(reg | SUN4I_HDMI_DDC_FIFO_CTRL_CLEAR,
+ hdmi->base + SUN4I_HDMI_DDC_FIFO_CTRL_REG);
+
+ writel(count, hdmi->base + SUN4I_HDMI_DDC_BYTE_COUNT_REG);
+ writel(SUN4I_HDMI_DDC_CMD_EXPLICIT_EDDC_READ,
+ hdmi->base + SUN4I_HDMI_DDC_CMD_REG);
+
+ reg = readl(hdmi->base + SUN4I_HDMI_DDC_CTRL_REG);
+ writel(reg | SUN4I_HDMI_DDC_CTRL_START_CMD,
+ hdmi->base + SUN4I_HDMI_DDC_CTRL_REG);
+
+ if (readl_poll_timeout(hdmi->base + SUN4I_HDMI_DDC_CTRL_REG, reg,
+ !(reg & SUN4I_HDMI_DDC_CTRL_START_CMD),
+ 100, 100000))
+ return -EIO;
+
+ for (i = 0; i < count; i++)
+ buf[i] = readb(hdmi->base + SUN4I_HDMI_DDC_FIFO_DATA_REG);
+
+ return 0;
+}
+
+static int sun4i_hdmi_read_edid_block(void *data, u8 *buf, unsigned int blk,
+ size_t length)
+{
+ struct sun4i_hdmi *hdmi = data;
+ int retry = 2, i;
+
+ do {
+ for (i = 0; i < length; i += SUN4I_HDMI_DDC_FIFO_SIZE) {
+ unsigned char offset = blk * EDID_LENGTH + i;
+ unsigned int count = min((unsigned int)SUN4I_HDMI_DDC_FIFO_SIZE,
+ length - i);
+ int ret;
+
+ ret = sun4i_hdmi_read_sub_block(hdmi, blk, offset,
+ buf + i, count);
+ if (ret)
+ return ret;
+ }
+ } while (!drm_edid_block_valid(buf, blk, true, NULL) && (retry--));
+
+ return 0;
+}
+
+static int sun4i_hdmi_get_modes(struct drm_connector *connector)
+{
+ struct sun4i_hdmi *hdmi = drm_connector_to_sun4i_hdmi(connector);
+ unsigned long reg;
+ struct edid *edid;
+ int ret;
+
+ /* Reset i2c controller */
+ writel(SUN4I_HDMI_DDC_CTRL_ENABLE | SUN4I_HDMI_DDC_CTRL_RESET,
+ hdmi->base + SUN4I_HDMI_DDC_CTRL_REG);
+ if (readl_poll_timeout(hdmi->base + SUN4I_HDMI_DDC_CTRL_REG, reg,
+ !(reg & SUN4I_HDMI_DDC_CTRL_RESET),
+ 100, 2000))
+ return -EIO;
+
+ writel(SUN4I_HDMI_DDC_LINE_CTRL_SDA_ENABLE |
+ SUN4I_HDMI_DDC_LINE_CTRL_SCL_ENABLE,
+ hdmi->base + SUN4I_HDMI_DDC_LINE_CTRL_REG);
+
+ clk_prepare_enable(hdmi->ddc_clk);
+ clk_set_rate(hdmi->ddc_clk, 100000);
+
+ edid = drm_do_get_edid(connector, sun4i_hdmi_read_edid_block, hdmi);
+ if (!edid)
+ return 0;
+
+ hdmi->hdmi_monitor = drm_detect_hdmi_monitor(edid);
+ DRM_DEBUG_DRIVER("Monitor is %s monitor\n",
+ hdmi->hdmi_monitor ? "an HDMI" : "a DVI");
+
+ drm_mode_connector_update_edid_property(connector, edid);
+ ret = drm_add_edid_modes(connector, edid);
+ kfree(edid);
+
+ clk_disable_unprepare(hdmi->ddc_clk);
+
+ return ret;
+}
+
+static const struct drm_connector_helper_funcs sun4i_hdmi_connector_helper_funcs = {
+ .get_modes = sun4i_hdmi_get_modes,
+};
+
+static enum drm_connector_status
+sun4i_hdmi_connector_detect(struct drm_connector *connector, bool force)
+{
+ struct sun4i_hdmi *hdmi = drm_connector_to_sun4i_hdmi(connector);
+ unsigned long reg;
+
+ if (readl_poll_timeout(hdmi->base + SUN4I_HDMI_HPD_REG, reg,
+ reg & SUN4I_HDMI_HPD_HIGH,
+ 0, 500000))
+ return connector_status_disconnected;
+
+ return connector_status_connected;
+}
+
+static const struct drm_connector_funcs sun4i_hdmi_connector_funcs = {
+ .dpms = drm_atomic_helper_connector_dpms,
+ .detect = sun4i_hdmi_connector_detect,
+ .fill_modes = drm_helper_probe_single_connector_modes,
+ .destroy = drm_connector_cleanup,
+ .reset = drm_atomic_helper_connector_reset,
+ .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
+ .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
+};
+
+static int sun4i_hdmi_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_hdmi *hdmi;
+ struct resource *res;
+ u32 reg;
+ int ret;
+
+ hdmi = devm_kzalloc(dev, sizeof(*hdmi), GFP_KERNEL);
+ if (!hdmi)
+ return -ENOMEM;
+ dev_set_drvdata(dev, hdmi);
+ hdmi->dev = dev;
+ hdmi->drv = drv;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ hdmi->base = devm_ioremap_resource(dev, res);
+ if (IS_ERR(hdmi->base)) {
+ dev_err(dev, "Couldn't map the HDMI encoder registers\n");
+ return PTR_ERR(hdmi->base);
+ }
+
+ hdmi->bus_clk = devm_clk_get(dev, "ahb");
+ if (IS_ERR(hdmi->bus_clk)) {
+ dev_err(dev, "Couldn't get the HDMI bus clock\n");
+ return PTR_ERR(hdmi->bus_clk);
+ }
+ clk_prepare_enable(hdmi->bus_clk);
+
+ hdmi->mod_clk = devm_clk_get(dev, "mod");
+ if (IS_ERR(hdmi->mod_clk)) {
+ dev_err(dev, "Couldn't get the HDMI mod clock\n");
+ return PTR_ERR(hdmi->mod_clk);
+ }
+ clk_prepare_enable(hdmi->mod_clk);
+
+ hdmi->pll0_clk = devm_clk_get(dev, "pll-0");
+ if (IS_ERR(hdmi->pll0_clk)) {
+ dev_err(dev, "Couldn't get the HDMI PLL 0 clock\n");
+ return PTR_ERR(hdmi->pll0_clk);
+ }
+
+ hdmi->pll1_clk = devm_clk_get(dev, "pll-1");
+ if (IS_ERR(hdmi->pll1_clk)) {
+ dev_err(dev, "Couldn't get the HDMI PLL 1 clock\n");
+ return PTR_ERR(hdmi->pll1_clk);
+ }
+
+ ret = sun4i_tmds_create(hdmi);
+ if (ret) {
+ dev_err(dev, "Couldn't create the TMDS clock\n");
+ return ret;
+ }
+
+ writel(SUN4I_HDMI_CTRL_ENABLE, hdmi->base + SUN4I_HDMI_CTRL_REG);
+
+ writel(SUN4I_HDMI_PAD_CTRL0_TXEN | SUN4I_HDMI_PAD_CTRL0_CKEN |
+ SUN4I_HDMI_PAD_CTRL0_PWENG | SUN4I_HDMI_PAD_CTRL0_PWEND |
+ SUN4I_HDMI_PAD_CTRL0_PWENC | SUN4I_HDMI_PAD_CTRL0_LDODEN |
+ SUN4I_HDMI_PAD_CTRL0_LDOCEN | SUN4I_HDMI_PAD_CTRL0_BIASEN,
+ hdmi->base + SUN4I_HDMI_PAD_CTRL0_REG);
+
+ /*
+ * We can't just initialize the register there, we need to
+ * protect the clock bits that have already been read out and
+ * cached by the clock framework.
+ */
+ reg = readl(hdmi->base + SUN4I_HDMI_PAD_CTRL1_REG);
+ reg &= SUN4I_HDMI_PAD_CTRL1_HALVE_CLK;
+ reg |= SUN4I_HDMI_PAD_CTRL1_REG_AMP(6) |
+ SUN4I_HDMI_PAD_CTRL1_REG_EMP(2) |
+ SUN4I_HDMI_PAD_CTRL1_REG_DENCK |
+ SUN4I_HDMI_PAD_CTRL1_REG_DEN |
+ SUN4I_HDMI_PAD_CTRL1_EMPCK_OPT |
+ SUN4I_HDMI_PAD_CTRL1_EMP_OPT |
+ SUN4I_HDMI_PAD_CTRL1_AMPCK_OPT |
+ SUN4I_HDMI_PAD_CTRL1_AMP_OPT;
+ writel(reg, hdmi->base + SUN4I_HDMI_PAD_CTRL1_REG);
+
+ reg = readl(hdmi->base + SUN4I_HDMI_PLL_CTRL_REG);
+ reg &= SUN4I_HDMI_PLL_CTRL_DIV_MASK;
+ reg |= SUN4I_HDMI_PLL_CTRL_VCO_S(8) | SUN4I_HDMI_PLL_CTRL_CS(7) |
+ SUN4I_HDMI_PLL_CTRL_CP_S(15) | SUN4I_HDMI_PLL_CTRL_S(7) |
+ SUN4I_HDMI_PLL_CTRL_VCO_GAIN(4) | SUN4I_HDMI_PLL_CTRL_SDIV2 |
+ SUN4I_HDMI_PLL_CTRL_LDO2_EN | SUN4I_HDMI_PLL_CTRL_LDO1_EN |
+ SUN4I_HDMI_PLL_CTRL_HV_IS_33 | SUN4I_HDMI_PLL_CTRL_BWS |
+ SUN4I_HDMI_PLL_CTRL_PLL_EN;
+ writel(reg, hdmi->base + SUN4I_HDMI_PLL_CTRL_REG);
+
+ ret = sun4i_ddc_create(hdmi, hdmi->tmds_clk);
+ if (ret) {
+ dev_err(dev, "Couldn't create the DDC clock\n");
+ return ret;
+ }
+
+ drm_encoder_helper_add(&hdmi->encoder,
+ &sun4i_hdmi_helper_funcs);
+ ret = drm_encoder_init(drm,
+ &hdmi->encoder,
+ &sun4i_hdmi_funcs,
+ DRM_MODE_ENCODER_TMDS,
+ NULL);
+ if (ret) {
+ dev_err(dev, "Couldn't initialise the HDMI encoder\n");
+ return ret;
+ }
+
+ hdmi->encoder.possible_crtcs = drm_of_find_possible_crtcs(drm,
+ dev->of_node);
+ if (!hdmi->encoder.possible_crtcs)
+ return -EPROBE_DEFER;
+
+ drm_connector_helper_add(&hdmi->connector,
+ &sun4i_hdmi_connector_helper_funcs);
+ ret = drm_connector_init(drm, &hdmi->connector,
+ &sun4i_hdmi_connector_funcs,
+ DRM_MODE_CONNECTOR_HDMIA);
+ if (ret) {
+ dev_err(dev,
+ "Couldn't initialise the HDMI connector\n");
+ goto err_cleanup_connector;
+ }
+
+ /* There is no HPD interrupt, so we need to poll the controller */
+ hdmi->connector.polled = DRM_CONNECTOR_POLL_CONNECT |
+ DRM_CONNECTOR_POLL_DISCONNECT;
+
+ drm_mode_connector_attach_encoder(&hdmi->connector, &hdmi->encoder);
+
+ return 0;
+
+err_cleanup_connector:
+ drm_encoder_cleanup(&hdmi->encoder);
+ return ret;
+}
+
+static void sun4i_hdmi_unbind(struct device *dev, struct device *master,
+ void *data)
+{
+ struct sun4i_hdmi *hdmi = dev_get_drvdata(dev);
+
+ drm_connector_cleanup(&hdmi->connector);
+ drm_encoder_cleanup(&hdmi->encoder);
+}
+
+static const struct component_ops sun4i_hdmi_ops = {
+ .bind = sun4i_hdmi_bind,
+ .unbind = sun4i_hdmi_unbind,
+};
+
+static int sun4i_hdmi_probe(struct platform_device *pdev)
+{
+ return component_add(&pdev->dev, &sun4i_hdmi_ops);
+}
+
+static int sun4i_hdmi_remove(struct platform_device *pdev)
+{
+ component_del(&pdev->dev, &sun4i_hdmi_ops);
+
+ return 0;
+}
+
+static const struct of_device_id sun4i_hdmi_of_table[] = {
+ { .compatible = "allwinner,sun5i-a10s-hdmi" },
+ { }
+};
+MODULE_DEVICE_TABLE(of, sun4i_hdmi_of_table);
+
+static struct platform_driver sun4i_hdmi_driver = {
+ .probe = sun4i_hdmi_probe,
+ .remove = sun4i_hdmi_remove,
+ .driver = {
+ .name = "sun4i-hdmi",
+ .of_match_table = sun4i_hdmi_of_table,
+ },
+};
+module_platform_driver(sun4i_hdmi_driver);
+
+MODULE_AUTHOR("Maxime Ripard <maxime.ripard@free-electrons.com>");
+MODULE_DESCRIPTION("Allwinner A10 HDMI Driver");
+MODULE_LICENSE("GPL");
--- /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 "sun4i_tcon.h"
+#include "sun4i_hdmi.h"
+
+struct sun4i_tmds {
+ struct clk_hw hw;
+ struct sun4i_hdmi *hdmi;
+};
+
+static inline struct sun4i_tmds *hw_to_tmds(struct clk_hw *hw)
+{
+ return container_of(hw, struct sun4i_tmds, hw);
+}
+
+
+static unsigned long sun4i_tmds_calc_divider(unsigned long rate,
+ unsigned long parent_rate,
+ u8 *div,
+ bool *half)
+{
+ unsigned long best_rate = 0;
+ u8 best_m = 0, m;
+ bool is_double;
+
+ for (m = 1; m < 16; m++) {
+ u8 d;
+
+ for (d = 1; d < 3; d++) {
+ unsigned long tmp_rate;
+
+ tmp_rate = parent_rate / m / d;
+
+ if (tmp_rate > rate)
+ continue;
+
+ if (!best_rate ||
+ (rate - tmp_rate) < (rate - best_rate)) {
+ best_rate = tmp_rate;
+ best_m = m;
+ is_double = d;
+ }
+ }
+ }
+
+ if (div && half) {
+ *div = best_m;
+ *half = is_double;
+ }
+
+ return best_rate;
+}
+
+
+static int sun4i_tmds_determine_rate(struct clk_hw *hw,
+ struct clk_rate_request *req)
+{
+ struct clk_hw *parent;
+ unsigned long best_parent = 0;
+ unsigned long rate = req->rate;
+ int best_div = 1, best_half = 1;
+ int i, j;
+
+ /*
+ * We only consider PLL3, since the TCON is very likely to be
+ * clocked from it, and to have the same rate than our HDMI
+ * clock, so we should not need to do anything.
+ */
+
+ parent = clk_hw_get_parent_by_index(hw, 0);
+ if (!parent)
+ return -EINVAL;
+
+ for (i = 1; i < 3; i++) {
+ for (j = 1; j < 16; j++) {
+ unsigned long ideal = rate * i * j;
+ unsigned long rounded;
+
+ rounded = clk_hw_round_rate(parent, ideal);
+
+ if (rounded == ideal) {
+ best_parent = rounded;
+ best_half = i;
+ best_div = j;
+ goto out;
+ }
+
+ if (abs(rate - rounded / i) <
+ abs(rate - best_parent / best_div)) {
+ best_parent = rounded;
+ best_div = i;
+ }
+ }
+ }
+
+out:
+ req->rate = best_parent / best_half / best_div;
+ req->best_parent_rate = best_parent;
+ req->best_parent_hw = parent;
+
+ return 0;
+}
+
+static unsigned long sun4i_tmds_recalc_rate(struct clk_hw *hw,
+ unsigned long parent_rate)
+{
+ struct sun4i_tmds *tmds = hw_to_tmds(hw);
+ u32 reg;
+
+ reg = readl(tmds->hdmi->base + SUN4I_HDMI_PAD_CTRL1_REG);
+ if (reg & SUN4I_HDMI_PAD_CTRL1_HALVE_CLK)
+ parent_rate /= 2;
+
+ reg = readl(tmds->hdmi->base + SUN4I_HDMI_PLL_CTRL_REG);
+ reg = (reg >> 4) & 0xf;
+ if (!reg)
+ reg = 1;
+
+ return parent_rate / reg;
+}
+
+static int sun4i_tmds_set_rate(struct clk_hw *hw, unsigned long rate,
+ unsigned long parent_rate)
+{
+ struct sun4i_tmds *tmds = hw_to_tmds(hw);
+ bool half;
+ u32 reg;
+ u8 div;
+
+ sun4i_tmds_calc_divider(rate, parent_rate, &div, &half);
+
+ reg = readl(tmds->hdmi->base + SUN4I_HDMI_PAD_CTRL1_REG);
+ reg &= ~SUN4I_HDMI_PAD_CTRL1_HALVE_CLK;
+ if (half)
+ reg |= SUN4I_HDMI_PAD_CTRL1_HALVE_CLK;
+ writel(reg, tmds->hdmi->base + SUN4I_HDMI_PAD_CTRL1_REG);
+
+ reg = readl(tmds->hdmi->base + SUN4I_HDMI_PLL_CTRL_REG);
+ reg &= ~SUN4I_HDMI_PLL_CTRL_DIV_MASK;
+ writel(reg | SUN4I_HDMI_PLL_CTRL_DIV(div),
+ tmds->hdmi->base + SUN4I_HDMI_PLL_CTRL_REG);
+
+ return 0;
+}
+
+static u8 sun4i_tmds_get_parent(struct clk_hw *hw)
+{
+ struct sun4i_tmds *tmds = hw_to_tmds(hw);
+ u32 reg;
+
+ reg = readl(tmds->hdmi->base + SUN4I_HDMI_PLL_DBG0_REG);
+ return ((reg & SUN4I_HDMI_PLL_DBG0_TMDS_PARENT_MASK) >>
+ SUN4I_HDMI_PLL_DBG0_TMDS_PARENT_SHIFT);
+}
+
+static int sun4i_tmds_set_parent(struct clk_hw *hw, u8 index)
+{
+ struct sun4i_tmds *tmds = hw_to_tmds(hw);
+ u32 reg;
+
+ if (index > 1)
+ return -EINVAL;
+
+ reg = readl(tmds->hdmi->base + SUN4I_HDMI_PLL_DBG0_REG);
+ reg &= ~SUN4I_HDMI_PLL_DBG0_TMDS_PARENT_MASK;
+ writel(reg | SUN4I_HDMI_PLL_DBG0_TMDS_PARENT(index),
+ tmds->hdmi->base + SUN4I_HDMI_PLL_DBG0_REG);
+
+ return 0;
+}
+
+static const struct clk_ops sun4i_tmds_ops = {
+ .determine_rate = sun4i_tmds_determine_rate,
+ .recalc_rate = sun4i_tmds_recalc_rate,
+ .set_rate = sun4i_tmds_set_rate,
+
+ .get_parent = sun4i_tmds_get_parent,
+ .set_parent = sun4i_tmds_set_parent,
+};
+
+int sun4i_tmds_create(struct sun4i_hdmi *hdmi)
+{
+ struct clk_init_data init;
+ struct sun4i_tmds *tmds;
+ const char *parents[2];
+
+ parents[0] = __clk_get_name(hdmi->pll0_clk);
+ if (!parents[0])
+ return -ENODEV;
+
+ parents[1] = __clk_get_name(hdmi->pll1_clk);
+ if (!parents[1])
+ return -ENODEV;
+
+ tmds = devm_kzalloc(hdmi->dev, sizeof(*tmds), GFP_KERNEL);
+ if (!tmds)
+ return -ENOMEM;
+
+ init.name = "hdmi-tmds";
+ init.ops = &sun4i_tmds_ops;
+ init.parent_names = parents;
+ init.num_parents = 2;
+ init.flags = CLK_SET_RATE_PARENT;
+
+ tmds->hdmi = hdmi;
+ tmds->hw.init = &init;
+
+ hdmi->tmds_clk = devm_clk_register(hdmi->dev, &tmds->hw);
+ if (IS_ERR(hdmi->tmds_clk))
+ return PTR_ERR(hdmi->tmds_clk);
+
+ return 0;
+}
projects / platform / kernel / linux-rpi.git / commitdiff