--- /dev/null
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2023 StarFive Technology Co., Ltd.
+ */
+
+#include <linux/clk.h>
+#include <linux/component.h>
+#include <linux/delay.h>
+#include <linux/err.h>
+#include <linux/hdmi.h>
+#include <linux/i2c.h>
+#include <linux/irq.h>
+#include <linux/media-bus-format.h>
+#include <linux/mfd/syscon.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/of_device.h>
+#include <linux/pm_runtime.h>
+#include <linux/reset.h>
+
+#include <drm/bridge/dw_hdmi.h>
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_edid.h>
+#include <drm/drm_managed.h>
+#include <drm/drm_of.h>
+#include <drm/drm_probe_helper.h>
+#include <drm/drm_simple_kms_helper.h>
+
+#include "starfive_hdmi.h"
+#include "vs_drv.h"
+#include "vs_crtc.h"
+
+static const char * const hdmi_clocks[] = {
+ "sysclk",
+ "mclk",
+ "bclk"
+};
+
+static struct starfive_hdmi_encoder *encoder_to_hdmi(struct drm_encoder *encoder)
+{
+ return container_of(encoder, struct starfive_hdmi_encoder, encoder);
+}
+
+static struct starfive_hdmi *connector_to_hdmi(struct drm_connector *connector)
+{
+ return container_of(connector, struct starfive_hdmi, connector);
+}
+
+static const struct post_pll_config post_pll_cfg_table[] = {
+ {25200000, 1, 80, 13, 3, 1},
+ {27000000, 1, 40, 11, 3, 1},
+ {33750000, 1, 40, 11, 3, 1},
+ {49000000, 1, 20, 1, 3, 3},
+ {241700000, 1, 20, 1, 3, 3},
+ {297000000, 4, 20, 0, 0, 3},
+ {594000000, 4, 20, 0, 0, 0},
+ { /* sentinel */ }
+};
+
+inline u8 hdmi_readb(struct starfive_hdmi *hdmi, u16 offset)
+{
+ return readl_relaxed(hdmi->regs + (offset) * 0x04);
+}
+
+inline void hdmi_writeb(struct starfive_hdmi *hdmi, u16 offset, u32 val)
+{
+ writel_relaxed(val, hdmi->regs + (offset) * 0x04);
+}
+
+inline void hdmi_writew(struct starfive_hdmi *hdmi, u16 offset, u32 val)
+{
+ writew_relaxed(val & 0xFF, hdmi->regs + (offset) * 0x04);
+ writew_relaxed((val >> 8) & 0xFF, hdmi->regs + (offset + 1) * 0x04);
+}
+
+inline void hdmi_modb(struct starfive_hdmi *hdmi, u16 offset,
+ u32 msk, u32 val)
+{
+ u8 temp = hdmi_readb(hdmi, offset) & ~msk;
+
+ temp |= val & msk;
+ hdmi_writeb(hdmi, offset, temp);
+}
+
+static int starfive_hdmi_enable_clk_deassert_rst(struct device *dev, struct starfive_hdmi *hdmi)
+{
+ int ret;
+
+ ret = clk_bulk_prepare_enable(hdmi->nclks, hdmi->clk_hdmi);
+ if (ret) {
+ dev_err(dev, "failed to enable clocks\n");
+ return ret;
+ }
+
+ ret = reset_control_deassert(hdmi->tx_rst);
+ if (ret < 0) {
+ dev_err(dev, "failed to deassert tx_rst\n");
+ return ret;
+ }
+ return 0;
+}
+
+static void starfive_hdmi_disable_clk_assert_rst(struct device *dev, struct starfive_hdmi *hdmi)
+{
+ int ret;
+
+ ret = reset_control_assert(hdmi->tx_rst);
+ if (ret < 0)
+ dev_err(dev, "failed to assert tx_rst\n");
+
+ clk_bulk_disable_unprepare(hdmi->nclks, hdmi->clk_hdmi);
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int hdmi_system_pm_suspend(struct device *dev)
+{
+ return pm_runtime_force_suspend(dev);
+}
+
+static int hdmi_system_pm_resume(struct device *dev)
+{
+ return pm_runtime_force_resume(dev);
+}
+#endif
+
+#ifdef CONFIG_PM
+static int hdmi_runtime_suspend(struct device *dev)
+{
+ struct starfive_hdmi *hdmi = dev_get_drvdata(dev);
+
+ starfive_hdmi_disable_clk_assert_rst(dev, hdmi);
+
+ return 0;
+}
+
+static int hdmi_runtime_resume(struct device *dev)
+{
+ struct starfive_hdmi *hdmi = dev_get_drvdata(dev);
+
+ return starfive_hdmi_enable_clk_deassert_rst(dev, hdmi);
+}
+#endif
+
+static void starfive_hdmi_tx_phy_power_down(struct starfive_hdmi *hdmi)
+{
+ hdmi_modb(hdmi, HDMI_SYS_CTRL, m_POWER, v_PWR_OFF);
+}
+
+static void starfive_hdmi_tx_phy_power_on(struct starfive_hdmi *hdmi)
+{
+ hdmi_modb(hdmi, HDMI_SYS_CTRL, m_POWER, v_PWR_ON);
+}
+
+static void starfive_hdmi_config_pll(struct starfive_hdmi *hdmi)
+{
+ u32 val;
+ u8 reg_1ad_value = hdmi->post_cfg->post_div_en ?
+ hdmi->post_cfg->postdiv : 0x00;
+ u8 reg_1aa_value = hdmi->post_cfg->post_div_en ?
+ 0x0e : 0x02;
+
+ hdmi_writeb(hdmi, STARFIVE_PRE_PLL_CONTROL, STARFIVE_PRE_PLL_POWER_DOWN);
+ hdmi_writeb(hdmi, STARFIVE_POST_PLL_DIV_1,
+ STARFIVE_POST_PLL_POST_DIV_ENABLE |
+ STARFIVE_POST_PLL_REFCLK_SEL_TMDS |
+ STARFIVE_POST_PLL_POWER_DOWN);
+ hdmi_writeb(hdmi, STARFIVE_PRE_PLL_DIV_1, STARFIVE_PRE_PLL_PRE_DIV(hdmi->pre_cfg.prediv));
+
+ val = STARFIVE_SPREAD_SPECTRUM_MOD_DISABLE | STARFIVE_SPREAD_SPECTRUM_MOD_DOWN;
+ if (!hdmi->pre_cfg.fracdiv)
+ val |= STARFIVE_PRE_PLL_FRAC_DIV_DISABLE;
+ hdmi_writeb(hdmi, STARFIVE_PRE_PLL_DIV_2,
+ STARFIVE_PRE_PLL_FB_DIV_11_8(hdmi->pre_cfg.fbdiv) | val);
+ hdmi_writeb(hdmi, STARFIVE_PRE_PLL_DIV_3,
+ STARFIVE_PRE_PLL_FB_DIV_7_0(hdmi->pre_cfg.fbdiv));
+ hdmi_writeb(hdmi, STARFIVE_PRE_PLL_DIV_4,
+ STARFIVE_PRE_PLL_TMDSCLK_DIV_C(hdmi->pre_cfg.tmds_div_c) |
+ STARFIVE_PRE_PLL_TMDSCLK_DIV_A(hdmi->pre_cfg.tmds_div_a) |
+ STARFIVE_PRE_PLL_TMDSCLK_DIV_B(hdmi->pre_cfg.tmds_div_b));
+
+ if (hdmi->pre_cfg.fracdiv) {
+ hdmi_writeb(hdmi, STARFIVE_PRE_PLL_FRAC_DIV_L,
+ STARFIVE_PRE_PLL_FRAC_DIV_7_0(hdmi->pre_cfg.fracdiv));
+ hdmi_writeb(hdmi, STARFIVE_PRE_PLL_FRAC_DIV_M,
+ STARFIVE_PRE_PLL_FRAC_DIV_15_8(hdmi->pre_cfg.fracdiv));
+ hdmi_writeb(hdmi, STARFIVE_PRE_PLL_FRAC_DIV_H,
+ STARFIVE_PRE_PLL_FRAC_DIV_23_16(hdmi->pre_cfg.fracdiv));
+ }
+
+ hdmi_writeb(hdmi, STARFIVE_PRE_PLL_DIV_5,
+ STARFIVE_PRE_PLL_PCLK_DIV_A(hdmi->pre_cfg.pclk_div_a) |
+ STARFIVE_PRE_PLL_PCLK_DIV_B(hdmi->pre_cfg.pclk_div_b));
+ hdmi_writeb(hdmi, STARFIVE_PRE_PLL_DIV_6,
+ STARFIVE_PRE_PLL_PCLK_DIV_C(hdmi->pre_cfg.pclk_div_c) |
+ STARFIVE_PRE_PLL_PCLK_DIV_D(hdmi->pre_cfg.pclk_div_d));
+
+ /*pre-pll power down*/
+ hdmi_modb(hdmi, STARFIVE_PRE_PLL_CONTROL, STARFIVE_PRE_PLL_POWER_DOWN, 0);
+
+ hdmi_modb(hdmi, STARFIVE_POST_PLL_DIV_2, STARFIVE_POST_PLL_Pre_DIV_MASK,
+ STARFIVE_POST_PLL_PRE_DIV(hdmi->post_cfg->prediv));
+ hdmi_writeb(hdmi, STARFIVE_POST_PLL_DIV_3, hdmi->post_cfg->fbdiv & 0xff);
+ hdmi_writeb(hdmi, STARFIVE_POST_PLL_DIV_4, reg_1ad_value);
+ hdmi_writeb(hdmi, STARFIVE_POST_PLL_DIV_1, reg_1aa_value);
+}
+
+static void starfive_hdmi_tmds_driver_on(struct starfive_hdmi *hdmi)
+{
+ hdmi_modb(hdmi, STARFIVE_TMDS_CONTROL,
+ STARFIVE_TMDS_DRIVER_ENABLE, STARFIVE_TMDS_DRIVER_ENABLE);
+}
+
+static void starfive_hdmi_sync_tmds(struct starfive_hdmi *hdmi)
+{
+ /*first send 0 to this bit, then send 1 and keep 1 into this bit*/
+ hdmi_writeb(hdmi, HDMI_SYNC, 0x0);
+ hdmi_writeb(hdmi, HDMI_SYNC, 0x1);
+}
+
+static void starfive_hdmi_i2c_init(struct starfive_hdmi *hdmi)
+{
+ int ddc_bus_freq;
+
+ ddc_bus_freq = (clk_get_rate(hdmi->clk_hdmi[CLK_SYS].clk) >> 2) / HDMI_SCL_RATE;
+
+ hdmi_writeb(hdmi, DDC_BUS_FREQ_L, ddc_bus_freq & 0xFF);
+ hdmi_writeb(hdmi, DDC_BUS_FREQ_H, (ddc_bus_freq >> 8) & 0xFF);
+
+ /* Clear the EDID interrupt flag and mute the interrupt */
+ hdmi_writeb(hdmi, HDMI_INTERRUPT_MASK1, 0);
+ hdmi_writeb(hdmi, HDMI_INTERRUPT_STATUS1, m_INT_EDID_READY);
+}
+
+static void starfive_hdmi_phy_get_pre_pll_cfg(struct starfive_hdmi *hdmi)
+{
+ if (hdmi->tmds_rate > 30000000) {
+ hdmi->pre_cfg.pixclock = hdmi->tmds_rate;
+ hdmi->pre_cfg.tmdsclock = hdmi->tmds_rate;
+ hdmi->pre_cfg.prediv = 1;
+ hdmi->pre_cfg.fbdiv = hdmi->tmds_rate / 3000000;
+ hdmi->pre_cfg.tmds_div_a = 0;
+ hdmi->pre_cfg.tmds_div_b = 1;
+ hdmi->pre_cfg.tmds_div_c = 1;
+ hdmi->pre_cfg.pclk_div_a = 1;
+ hdmi->pre_cfg.pclk_div_b = 0;
+ hdmi->pre_cfg.pclk_div_c = 2;
+ hdmi->pre_cfg.pclk_div_d = 2;
+ hdmi->pre_cfg.vco_div_5_en = hdmi->tmds_rate % 3000000 ? 1 : 0;
+
+ if (hdmi->pre_cfg.vco_div_5_en) {
+ hdmi->pre_cfg.fracdiv = (hdmi->tmds_rate % 3000000) *
+ 0xffffff / 1000000;
+ }
+ } else {
+ hdmi->pre_cfg.pixclock = hdmi->tmds_rate;
+ hdmi->pre_cfg.tmdsclock = hdmi->tmds_rate;
+ hdmi->pre_cfg.prediv = 1;
+ hdmi->pre_cfg.fbdiv = hdmi->tmds_rate / 1000000;
+ hdmi->pre_cfg.tmds_div_a = 2;
+ hdmi->pre_cfg.tmds_div_b = 1;
+ hdmi->pre_cfg.tmds_div_c = 1;
+ hdmi->pre_cfg.pclk_div_a = 3;
+ hdmi->pre_cfg.pclk_div_b = 0;
+ hdmi->pre_cfg.pclk_div_c = 3;
+ hdmi->pre_cfg.pclk_div_d = 4;
+ hdmi->pre_cfg.vco_div_5_en = hdmi->tmds_rate % 1000000 ? 1 : 0;
+
+ if (hdmi->pre_cfg.vco_div_5_en) {
+ hdmi->pre_cfg.fracdiv = (hdmi->tmds_rate % 1000000) *
+ 0xffffff / 1000000;
+ }
+ }
+}
+
+static int starfive_hdmi_phy_clk_set_rate(struct starfive_hdmi *hdmi)
+{
+ hdmi->post_cfg = post_pll_cfg_table;
+
+ starfive_hdmi_phy_get_pre_pll_cfg(hdmi);
+
+ for (; hdmi->post_cfg->tmdsclock != 0; hdmi->post_cfg++)
+ if (hdmi->tmds_rate <= hdmi->post_cfg->tmdsclock)
+ break;
+
+ starfive_hdmi_config_pll(hdmi);
+
+ return 0;
+}
+
+static int starfive_hdmi_config_video_timing(struct starfive_hdmi *hdmi,
+ struct drm_display_mode *mode)
+{
+ int value;
+ /* Set detail external video timing */
+ value = mode->htotal;
+ hdmi_writew(hdmi, HDMI_VIDEO_EXT_HTOTAL_L, value);
+
+ value = mode->htotal - mode->hdisplay;
+ hdmi_writew(hdmi, HDMI_VIDEO_EXT_HBLANK_L, value);
+
+ value = mode->htotal - mode->hsync_start;
+ hdmi_writew(hdmi, HDMI_VIDEO_EXT_HDELAY_L, value);
+
+ value = mode->hsync_end - mode->hsync_start;
+ hdmi_writew(hdmi, HDMI_VIDEO_EXT_HDURATION_L, value);
+
+ value = mode->vtotal;
+ hdmi_writew(hdmi, HDMI_VIDEO_EXT_VTOTAL_L, value);
+
+ value = mode->vtotal - mode->vdisplay;
+ hdmi_writeb(hdmi, HDMI_VIDEO_EXT_VBLANK, value & 0xFF);
+
+ value = mode->vtotal - mode->vsync_start;
+ hdmi_writeb(hdmi, HDMI_VIDEO_EXT_VDELAY, value & 0xFF);
+
+ value = mode->vsync_end - mode->vsync_start;
+ hdmi_writeb(hdmi, HDMI_VIDEO_EXT_VDURATION, value & 0xFF);
+
+ /* Set detail external video timing polarity and interlace mode */
+ value = v_EXTERANL_VIDEO(1);
+ value |= mode->flags & DRM_MODE_FLAG_PHSYNC ?
+ v_HSYNC_POLARITY(1) : v_HSYNC_POLARITY(0);
+ value |= mode->flags & DRM_MODE_FLAG_PVSYNC ?
+ v_VSYNC_POLARITY(1) : v_VSYNC_POLARITY(0);
+ value |= mode->flags & DRM_MODE_FLAG_INTERLACE ?
+ v_INETLACE(1) : v_INETLACE(0);
+
+ hdmi_writeb(hdmi, HDMI_VIDEO_TIMING_CTL, value);
+ return 0;
+}
+
+static int starfive_hdmi_setup(struct starfive_hdmi *hdmi,
+ struct drm_display_mode *mode)
+{
+ int ret;
+ u32 val;
+
+ hdmi_modb(hdmi, STARFIVE_BIAS_CONTROL, STARFIVE_BIAS_ENABLE, STARFIVE_BIAS_ENABLE);
+ hdmi_writeb(hdmi, STARFIVE_RX_CONTROL, STARFIVE_RX_ENABLE);
+
+ hdmi->tmds_rate = mode->clock * 1000;
+ starfive_hdmi_phy_clk_set_rate(hdmi);
+
+ ret = readx_poll_timeout(readl_relaxed,
+ hdmi->regs + (STARFIVE_PRE_PLL_LOCK_STATUS) * 0x04,
+ val, val & 0x1, 1000, 100000);
+ if (ret < 0) {
+ dev_err(hdmi->dev, "failed to wait pre-pll lock\n");
+ return ret;
+ }
+
+ ret = readx_poll_timeout(readl_relaxed,
+ hdmi->regs + (STARFIVE_POST_PLL_LOCK_STATUS) * 0x04,
+ val, val & 0x1, 1000, 100000);
+ if (ret < 0) {
+ dev_err(hdmi->dev, "failed to wait post-pll lock\n");
+ return ret;
+ }
+
+ /*turn on LDO*/
+ hdmi_writeb(hdmi, STARFIVE_LDO_CONTROL, STARFIVE_LDO_ENABLE);
+ /*turn on serializer*/
+ hdmi_writeb(hdmi, STARFIVE_SERIALIER_CONTROL, STARFIVE_SERIALIER_ENABLE);
+
+ starfive_hdmi_tx_phy_power_down(hdmi);
+ starfive_hdmi_config_video_timing(hdmi, mode);
+ starfive_hdmi_tx_phy_power_on(hdmi);
+
+ starfive_hdmi_tmds_driver_on(hdmi);
+ starfive_hdmi_sync_tmds(hdmi);
+
+ return 0;
+}
+
+static void starfive_hdmi_encoder_enable(struct drm_encoder *encoder)
+{
+ struct starfive_hdmi_encoder *hdmi_encoder = encoder_to_hdmi(encoder);
+ struct drm_display_mode *mode = &encoder->crtc->state->adjusted_mode;
+ int ret, idx;
+ struct drm_device *drm = hdmi_encoder->hdmi->connector.dev;
+
+ if (drm && !drm_dev_enter(drm, &idx))
+ return;
+
+ ret = pm_runtime_get_sync(hdmi_encoder->hdmi->dev);
+ if (ret < 0)
+ return;
+ starfive_hdmi_setup(hdmi_encoder->hdmi, mode);
+
+ if (drm)
+ drm_dev_exit(idx);
+}
+
+static void starfive_hdmi_encoder_disable(struct drm_encoder *encoder)
+{
+ struct starfive_hdmi_encoder *hdmi_encoder = encoder_to_hdmi(encoder);
+
+ pm_runtime_put(hdmi_encoder->hdmi->dev);
+}
+
+static int
+starfive_hdmi_encoder_atomic_check(struct drm_encoder *encoder,
+ struct drm_crtc_state *crtc_state,
+ struct drm_connector_state *conn_state)
+{
+ bool valid = false;
+ struct drm_display_mode *mode = &crtc_state->adjusted_mode;
+ struct vs_crtc_state *vs_crtc_state = to_vs_crtc_state(crtc_state);
+
+ vs_crtc_state->encoder_type = encoder->encoder_type;
+ vs_crtc_state->output_fmt = MEDIA_BUS_FMT_RGB888_1X24;
+
+ int pclk = mode->clock * 1000;
+
+ if (pclk <= PIXCLOCK_4K_30FPS)
+ valid = true;
+
+ return (valid) ? 0 : -EINVAL;
+}
+
+static const struct drm_encoder_helper_funcs starfive_hdmi_encoder_helper_funcs = {
+ .enable = starfive_hdmi_encoder_enable,
+ .disable = starfive_hdmi_encoder_disable,
+ .atomic_check = starfive_hdmi_encoder_atomic_check,
+};
+
+static enum drm_connector_status
+starfive_hdmi_connector_detect(struct drm_connector *connector, bool force)
+{
+ struct starfive_hdmi *hdmi = connector_to_hdmi(connector);
+ struct drm_device *drm = hdmi->connector.dev;
+ int ret;
+ int idx;
+
+ if (drm && !drm_dev_enter(drm, &idx))
+ return connector_status_disconnected;
+
+ ret = pm_runtime_get_sync(hdmi->dev);
+ if (ret < 0)
+ return ret;
+
+ ret = (hdmi_readb(hdmi, HDMI_STATUS) & m_HOTPLUG) ?
+ connector_status_connected : connector_status_disconnected;
+ pm_runtime_put(hdmi->dev);
+
+ if (drm)
+ drm_dev_exit(idx);
+
+ return ret;
+}
+
+static int starfive_hdmi_connector_get_modes(struct drm_connector *connector)
+{
+ struct starfive_hdmi *hdmi = connector_to_hdmi(connector);
+ int ret = 0;
+
+ if (!hdmi->ddc)
+ return 0;
+ ret = pm_runtime_get_sync(hdmi->dev);
+ if (ret < 0)
+ return ret;
+
+ ret = drm_connector_helper_get_modes_from_ddc(connector);
+ pm_runtime_put(hdmi->dev);
+
+ return ret;
+}
+
+static enum drm_mode_status
+starfive_hdmi_connector_mode_valid(struct drm_connector *connector,
+ struct drm_display_mode *mode)
+{
+ int pclk = mode->clock * 1000;
+ bool valid = false;
+
+ if (pclk <= PIXCLOCK_4K_30FPS)
+ valid = true;
+
+ return (valid) ? MODE_OK : MODE_BAD;
+}
+
+static int
+starfive_hdmi_probe_single_connector_modes(struct drm_connector *connector,
+ u32 maxX, u32 maxY)
+{
+ return drm_helper_probe_single_connector_modes(connector, 3840, 2160);
+}
+
+static const struct drm_connector_funcs starfive_hdmi_connector_funcs = {
+ .fill_modes = starfive_hdmi_probe_single_connector_modes,
+ .detect = starfive_hdmi_connector_detect,
+ .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 struct drm_connector_helper_funcs starfive_hdmi_connector_helper_funcs = {
+ .get_modes = starfive_hdmi_connector_get_modes,
+ .mode_valid = starfive_hdmi_connector_mode_valid,
+};
+
+static int starfive_hdmi_register(struct drm_device *drm,
+ struct starfive_hdmi_encoder *hdmi_encoder)
+{
+ struct drm_encoder *encoder = &hdmi_encoder->encoder;
+ struct device *dev = hdmi_encoder->hdmi->dev;
+
+ encoder->possible_crtcs = drm_of_find_possible_crtcs(drm, dev->of_node);
+
+ /*
+ * If we failed to find the CRTC(s) which this encoder is
+ * supposed to be connected to, it's because the CRTC has
+ * not been registered yet. Defer probing, and hope that
+ * the required CRTC is added later.
+ */
+ if (encoder->possible_crtcs == 0)
+ return -EPROBE_DEFER;
+
+ drm_encoder_helper_add(encoder, &starfive_hdmi_encoder_helper_funcs);
+
+ hdmi_encoder->hdmi->connector.polled = DRM_CONNECTOR_POLL_HPD;
+
+ drm_connector_helper_add(&hdmi_encoder->hdmi->connector,
+ &starfive_hdmi_connector_helper_funcs);
+ drmm_connector_init(drm, &hdmi_encoder->hdmi->connector,
+ &starfive_hdmi_connector_funcs,
+ DRM_MODE_CONNECTOR_HDMIA,
+ hdmi_encoder->hdmi->ddc);
+
+ drm_connector_attach_encoder(&hdmi_encoder->hdmi->connector, encoder);
+
+ return 0;
+}
+
+static irqreturn_t starfive_hdmi_i2c_irq(struct starfive_hdmi *hdmi)
+{
+ struct starfive_hdmi_i2c *i2c = hdmi->i2c;
+ u8 stat;
+
+ stat = hdmi_readb(hdmi, HDMI_INTERRUPT_STATUS1);
+ if (!(stat & m_INT_EDID_READY))
+ return IRQ_NONE;
+
+ /* Clear HDMI EDID interrupt flag */
+ hdmi_writeb(hdmi, HDMI_INTERRUPT_STATUS1, m_INT_EDID_READY);
+
+ complete(&i2c->cmp);
+
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t starfive_hdmi_hardirq(int irq, void *dev_id)
+{
+ struct starfive_hdmi *hdmi = dev_id;
+ irqreturn_t ret = IRQ_NONE;
+ u8 interrupt;
+
+ if (hdmi->i2c)
+ ret = starfive_hdmi_i2c_irq(hdmi);
+
+ interrupt = hdmi_readb(hdmi, HDMI_STATUS);
+ if (interrupt & m_INT_HOTPLUG) {
+ hdmi_modb(hdmi, HDMI_STATUS, m_INT_HOTPLUG, m_INT_HOTPLUG);
+ ret = IRQ_WAKE_THREAD;
+ }
+
+ return ret;
+}
+
+static irqreturn_t starfive_hdmi_irq(int irq, void *dev_id)
+{
+ struct starfive_hdmi *hdmi = dev_id;
+
+ drm_connector_helper_hpd_irq_event(&hdmi->connector);
+
+ return IRQ_HANDLED;
+}
+
+static int starfive_hdmi_i2c_read(struct starfive_hdmi *hdmi, struct i2c_msg *msgs)
+{
+ int length = msgs->len;
+ u8 *buf = msgs->buf;
+ int ret;
+
+ ret = wait_for_completion_timeout(&hdmi->i2c->cmp, HZ / 10);
+ if (!ret)
+ return -EAGAIN;
+
+ while (length--)
+ *buf++ = hdmi_readb(hdmi, HDMI_EDID_FIFO_ADDR);
+
+ return 0;
+}
+
+static int starfive_hdmi_i2c_write(struct starfive_hdmi *hdmi, struct i2c_msg *msgs)
+{
+ /*
+ * The DDC module only support read EDID message, so
+ * we assume that each word write to this i2c adapter
+ * should be the offset of EDID word address.
+ */
+ if (msgs->len != 1 ||
+ (msgs->addr != DDC_ADDR && msgs->addr != DDC_SEGMENT_ADDR))
+ return -EINVAL;
+
+ reinit_completion(&hdmi->i2c->cmp);
+
+ if (msgs->addr == DDC_SEGMENT_ADDR)
+ hdmi->i2c->segment_addr = msgs->buf[0];
+ if (msgs->addr == DDC_ADDR)
+ hdmi->i2c->ddc_addr = msgs->buf[0];
+
+ /* Set edid fifo first addr */
+ hdmi_writeb(hdmi, HDMI_EDID_FIFO_OFFSET, 0x00);
+
+ /* Set edid word address 0x00/0x80 */
+ hdmi_writeb(hdmi, HDMI_EDID_WORD_ADDR, hdmi->i2c->ddc_addr);
+
+ /* Set edid segment pointer */
+ hdmi_writeb(hdmi, HDMI_EDID_SEGMENT_POINTER, hdmi->i2c->segment_addr);
+
+ return 0;
+}
+
+static int starfive_hdmi_i2c_xfer(struct i2c_adapter *adap,
+ struct i2c_msg *msgs, int num)
+{
+ struct starfive_hdmi *hdmi = i2c_get_adapdata(adap);
+ struct starfive_hdmi_i2c *i2c = hdmi->i2c;
+ int i, ret = 0;
+
+ mutex_lock(&i2c->lock);
+
+ /* Clear the EDID interrupt flag and unmute the interrupt */
+ hdmi_writeb(hdmi, HDMI_INTERRUPT_MASK1, m_INT_EDID_READY);
+ hdmi_writeb(hdmi, HDMI_INTERRUPT_STATUS1, m_INT_EDID_READY);
+
+ for (i = 0; i < num; i++) {
+ DRM_DEV_DEBUG(hdmi->dev,
+ "xfer: num: %d/%d, len: %d, flags: %#x\n",
+ i + 1, num, msgs[i].len, msgs[i].flags);
+
+ if (msgs[i].flags & I2C_M_RD)
+ ret = starfive_hdmi_i2c_read(hdmi, &msgs[i]);
+ else
+ ret = starfive_hdmi_i2c_write(hdmi, &msgs[i]);
+
+ if (ret < 0)
+ break;
+ }
+
+ if (!ret)
+ ret = num;
+
+ /* Mute HDMI EDID interrupt */
+ hdmi_writeb(hdmi, HDMI_INTERRUPT_MASK1, 0);
+
+ mutex_unlock(&i2c->lock);
+
+ return ret;
+}
+
+static u32 starfive_hdmi_i2c_func(struct i2c_adapter *adapter)
+{
+ return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL;
+}
+
+static const struct i2c_algorithm starfive_hdmi_algorithm = {
+ .master_xfer = starfive_hdmi_i2c_xfer,
+ .functionality = starfive_hdmi_i2c_func,
+};
+
+static struct i2c_adapter *starfive_hdmi_i2c_adapter(struct starfive_hdmi *hdmi)
+{
+ struct i2c_adapter *adap;
+ struct starfive_hdmi_i2c *i2c;
+ int ret;
+
+ i2c = devm_kzalloc(hdmi->dev, sizeof(*i2c), GFP_KERNEL);
+ if (!i2c)
+ return ERR_PTR(-ENOMEM);
+
+ mutex_init(&i2c->lock);
+ init_completion(&i2c->cmp);
+
+ adap = &i2c->adap;
+ adap->class = I2C_CLASS_DDC;
+ adap->owner = THIS_MODULE;
+ adap->dev.parent = hdmi->dev;
+ adap->algo = &starfive_hdmi_algorithm;
+ strscpy(adap->name, "Starfive HDMI", sizeof(adap->name));
+ i2c_set_adapdata(adap, hdmi);
+
+ ret = devm_i2c_add_adapter(hdmi->dev, adap);
+ if (ret) {
+ dev_warn(hdmi->dev, "cannot add %s I2C adapter\n", adap->name);
+ devm_kfree(hdmi->dev, i2c);
+ return ERR_PTR(ret);
+ }
+
+ hdmi->i2c = i2c;
+
+ DRM_DEV_INFO(hdmi->dev, "registered %s I2C bus driver success\n", adap->name);
+
+ return adap;
+}
+
+static int starfive_hdmi_get_clk_rst(struct device *dev, struct starfive_hdmi *hdmi)
+{
+ int ret;
+
+ hdmi->nclks = ARRAY_SIZE(hdmi->clk_hdmi);
+ for (int i = 0; i < hdmi->nclks; ++i)
+ hdmi->clk_hdmi[i].id = hdmi_clocks[i];
+
+ ret = devm_clk_bulk_get(dev, hdmi->nclks, hdmi->clk_hdmi);
+ if (ret) {
+ dev_err(dev, "Failed to get clk controls\n");
+ return ret;
+ }
+
+ hdmi->tx_rst = devm_reset_control_get_by_index(dev, 0);
+ if (IS_ERR(hdmi->tx_rst)) {
+ dev_err(dev, "failed to get tx_rst reset\n");
+ return PTR_ERR(hdmi->tx_rst);
+ }
+
+ return 0;
+}
+
+static int starfive_hdmi_bind(struct device *dev, struct device *master,
+ void *data)
+{
+ struct drm_device *drm = dev_get_drvdata(master);
+ struct starfive_hdmi_encoder *hdmi_encoder;
+ int ret;
+
+ hdmi_encoder = drmm_simple_encoder_alloc(drm, struct starfive_hdmi_encoder,
+ encoder, DRM_MODE_ENCODER_TMDS);
+ if (IS_ERR(hdmi_encoder))
+ return PTR_ERR(hdmi_encoder);
+
+ hdmi_encoder->hdmi = dev_get_drvdata(dev);
+ hdmi_encoder->hdmi->drm_dev = drm;
+
+ ret = pm_runtime_resume_and_get(dev);
+ if (ret)
+ return ret;
+
+ starfive_hdmi_i2c_init(hdmi_encoder->hdmi);
+
+ ret = starfive_hdmi_register(drm, hdmi_encoder);
+ if (ret)
+ goto err_put_adapter;
+
+ /* Unmute hotplug interrupt */
+ hdmi_modb(hdmi_encoder->hdmi, HDMI_STATUS, m_MASK_INT_HOTPLUG, v_MASK_INT_HOTPLUG(1));
+
+ ret = devm_request_threaded_irq(dev, hdmi_encoder->hdmi->irq, starfive_hdmi_hardirq,
+ starfive_hdmi_irq, IRQF_SHARED,
+ dev_name(dev), hdmi_encoder->hdmi);
+ if (ret < 0)
+ goto err_put_adapter;
+
+ pm_runtime_put_sync(dev);
+
+ return 0;
+
+err_put_adapter:
+ i2c_put_adapter(hdmi_encoder->hdmi->ddc);
+ return ret;
+}
+
+static const struct component_ops starfive_hdmi_ops = {
+ .bind = starfive_hdmi_bind,
+};
+
+static int starfive_hdmi_probe(struct platform_device *pdev)
+{
+ int ret;
+ struct starfive_hdmi *hdmi;
+ struct resource *iores;
+
+ hdmi = devm_kzalloc(&pdev->dev, sizeof(*hdmi), GFP_KERNEL);
+ if (!hdmi)
+ return -ENOMEM;
+
+ dev_set_drvdata(&pdev->dev, hdmi);
+ hdmi->dev = &pdev->dev;
+
+ iores = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ hdmi->regs = devm_ioremap_resource(hdmi->dev, iores);
+ if (IS_ERR(hdmi->regs))
+ return PTR_ERR(hdmi->regs);
+
+ ret = starfive_hdmi_get_clk_rst(hdmi->dev, hdmi);
+ if (ret < 0)
+ return ret;
+
+ ret = devm_pm_runtime_enable(hdmi->dev);
+ if (ret)
+ return ret;
+
+ hdmi->irq = platform_get_irq(pdev, 0);
+ if (hdmi->irq < 0) {
+ ret = hdmi->irq;
+ return ret;
+ }
+
+ hdmi->ddc = starfive_hdmi_i2c_adapter(hdmi);
+ if (IS_ERR(hdmi->ddc)) {
+ ret = PTR_ERR(hdmi->ddc);
+ hdmi->ddc = NULL;
+ return ret;
+ }
+
+ return component_add(&pdev->dev, &starfive_hdmi_ops);
+}
+
+static int starfive_hdmi_remove(struct platform_device *pdev)
+{
+ component_del(&pdev->dev, &starfive_hdmi_ops);
+
+ return 0;
+}
+
+static const struct dev_pm_ops hdmi_pm_ops = {
+ SET_RUNTIME_PM_OPS(hdmi_runtime_suspend, hdmi_runtime_resume, NULL)
+ SET_LATE_SYSTEM_SLEEP_PM_OPS(hdmi_system_pm_suspend, hdmi_system_pm_resume)
+};
+
+static const struct of_device_id starfive_hdmi_dt_ids[] = {
+ { .compatible = "starfive,jh7110-inno-hdmi",},
+ {},
+};
+MODULE_DEVICE_TABLE(of, starfive_hdmi_dt_ids);
+
+struct platform_driver starfive_hdmi_driver = {
+ .probe = starfive_hdmi_probe,
+ .remove = starfive_hdmi_remove,
+ .driver = {
+ .name = "starfive-hdmi",
+ .of_match_table = starfive_hdmi_dt_ids,
+ .pm = &hdmi_pm_ops,
+ },
+};
+
+MODULE_AUTHOR("StarFive Corporation");
+MODULE_DESCRIPTION("Starfive HDMI Driver");
--- /dev/null
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2023 StarFive Technology Co., Ltd.
+ */
+
+#ifndef __STARFIVE_HDMI_H__
+#define __STARFIVE_HDMI_H__
+
+#include <drm/bridge/dw_hdmi.h>
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_edid.h>
+#include <drm/drm_of.h>
+#include <drm/drm_probe_helper.h>
+#include <drm/drm_simple_kms_helper.h>
+#include <linux/bitfield.h>
+#include <linux/bits.h>
+
+#define DDC_SEGMENT_ADDR 0x30
+
+#define HDMI_SCL_RATE (100 * 1000)
+#define DDC_BUS_FREQ_L 0x4b
+#define DDC_BUS_FREQ_H 0x4c
+
+#define HDMI_SYS_CTRL 0x00
+#define m_RST_ANALOG BIT(6)
+#define v_RST_ANALOG 0
+#define v_NOT_RST_ANALOG BIT(6)
+#define m_RST_DIGITAL BIT(5)
+#define v_RST_DIGITAL 0
+#define v_NOT_RST_DIGITAL BIT(5)
+#define m_REG_CLK_INV BIT(4)
+#define v_REG_CLK_NOT_INV 0
+#define v_REG_CLK_INV BIT(4)
+#define m_VCLK_INV BIT(3)
+#define v_VCLK_NOT_INV 0
+#define v_VCLK_INV BIT(3)
+#define m_REG_CLK_SOURCE BIT(2)
+#define v_REG_CLK_SOURCE_TMDS 0
+#define v_REG_CLK_SOURCE_SYS BIT(2)
+#define m_POWER BIT(1)
+#define v_PWR_ON 0
+#define v_PWR_OFF BIT(1)
+#define m_INT_POL BIT(0)
+#define v_INT_POL_HIGH 1
+#define v_INT_POL_LOW 0
+
+#define HDMI_AV_MUTE 0x05
+#define m_AVMUTE_CLEAR BIT(7)
+#define m_AVMUTE_ENABLE BIT(6)
+#define m_AUDIO_MUTE BIT(1)
+#define m_VIDEO_BLACK BIT(0)
+#define v_AVMUTE_CLEAR(n) ((n) << 7)
+#define v_AVMUTE_ENABLE(n) ((n) << 6)
+#define v_AUDIO_MUTE(n) ((n) << 1)
+#define v_VIDEO_MUTE(n) ((n) << 0)
+
+#define HDMI_VIDEO_TIMING_CTL 0x08
+#define v_VSYNC_POLARITY(n) ((n) << 3)
+#define v_HSYNC_POLARITY(n) ((n) << 2)
+#define v_INETLACE(n) ((n) << 1)
+#define v_EXTERANL_VIDEO(n) ((n) << 0)
+
+#define HDMI_VIDEO_EXT_HTOTAL_L 0x09
+#define HDMI_VIDEO_EXT_HTOTAL_H 0x0a
+#define HDMI_VIDEO_EXT_HBLANK_L 0x0b
+#define HDMI_VIDEO_EXT_HBLANK_H 0x0c
+#define HDMI_VIDEO_EXT_HDELAY_L 0x0d
+#define HDMI_VIDEO_EXT_HDELAY_H 0x0e
+#define HDMI_VIDEO_EXT_HDURATION_L 0x0f
+#define HDMI_VIDEO_EXT_HDURATION_H 0x10
+#define HDMI_VIDEO_EXT_VTOTAL_L 0x11
+#define HDMI_VIDEO_EXT_VTOTAL_H 0x12
+#define HDMI_VIDEO_EXT_VBLANK 0x13
+#define HDMI_VIDEO_EXT_VDELAY 0x14
+#define HDMI_VIDEO_EXT_VDURATION 0x15
+
+#define HDMI_EDID_SEGMENT_POINTER 0x4d
+#define HDMI_EDID_WORD_ADDR 0x4e
+#define HDMI_EDID_FIFO_OFFSET 0x4f
+#define HDMI_EDID_FIFO_ADDR 0x50
+
+#define HDMI_INTERRUPT_MASK1 0xc0
+#define HDMI_INTERRUPT_STATUS1 0xc1
+#define m_INT_ACTIVE_VSYNC BIT(5)
+#define m_INT_EDID_READY BIT(2)
+
+#define HDMI_STATUS 0xc8
+#define m_HOTPLUG BIT(7)
+#define m_MASK_INT_HOTPLUG BIT(5)
+#define m_INT_HOTPLUG BIT(1)
+#define v_MASK_INT_HOTPLUG(n) (((n) & 0x1) << 5)
+
+#define HDMI_SYNC 0xce
+
+#define UPDATE(x, h, l) FIELD_PREP(GENMASK(h, l), x)
+
+/* REG: 0x1a0 */
+#define STARFIVE_PRE_PLL_CONTROL 0x1a0
+#define STARFIVE_PCLK_VCO_DIV_5_MASK BIT(1)
+#define STARFIVE_PCLK_VCO_DIV_5(x) UPDATE(x, 1, 1)
+#define STARFIVE_PRE_PLL_POWER_DOWN BIT(0)
+
+/* REG: 0x1a1 */
+#define STARFIVE_PRE_PLL_DIV_1 0x1a1
+#define STARFIVE_PRE_PLL_PRE_DIV_MASK GENMASK(5, 0)
+#define STARFIVE_PRE_PLL_PRE_DIV(x) UPDATE(x, 5, 0)
+
+/* REG: 0x1a2 */
+#define STARFIVE_PRE_PLL_DIV_2 0x1a2
+#define STARFIVE_SPREAD_SPECTRUM_MOD_DOWN BIT(7)
+#define STARFIVE_SPREAD_SPECTRUM_MOD_DISABLE BIT(6)
+#define STARFIVE_PRE_PLL_FRAC_DIV_DISABLE UPDATE(3, 5, 4)
+#define STARFIVE_PRE_PLL_FB_DIV_11_8_MASK GENMASK(3, 0)
+#define STARFIVE_PRE_PLL_FB_DIV_11_8(x) UPDATE((x) >> 8, 3, 0)
+
+/* REG: 0x1a3 */
+#define STARFIVE_PRE_PLL_DIV_3 0x1a3
+#define STARFIVE_PRE_PLL_FB_DIV_7_0(x) UPDATE(x, 7, 0)
+
+/* REG: 0x1a4*/
+#define STARFIVE_PRE_PLL_DIV_4 0x1a4
+#define STARFIVE_PRE_PLL_TMDSCLK_DIV_C_MASK GENMASK(1, 0)
+#define STARFIVE_PRE_PLL_TMDSCLK_DIV_C(x) UPDATE(x, 1, 0)
+#define STARFIVE_PRE_PLL_TMDSCLK_DIV_B_MASK GENMASK(3, 2)
+#define STARFIVE_PRE_PLL_TMDSCLK_DIV_B(x) UPDATE(x, 3, 2)
+#define STARFIVE_PRE_PLL_TMDSCLK_DIV_A_MASK GENMASK(5, 4)
+#define STARFIVE_PRE_PLL_TMDSCLK_DIV_A(x) UPDATE(x, 5, 4)
+
+/* REG: 0x1a5 */
+#define STARFIVE_PRE_PLL_DIV_5 0x1a5
+#define STARFIVE_PRE_PLL_PCLK_DIV_B_SHIFT 5
+#define STARFIVE_PRE_PLL_PCLK_DIV_B_MASK GENMASK(6, 5)
+#define STARFIVE_PRE_PLL_PCLK_DIV_B(x) UPDATE(x, 6, 5)
+#define STARFIVE_PRE_PLL_PCLK_DIV_A_MASK GENMASK(4, 0)
+#define STARFIVE_PRE_PLL_PCLK_DIV_A(x) UPDATE(x, 4, 0)
+
+/* REG: 0x1a6 */
+#define STARFIVE_PRE_PLL_DIV_6 0x1a6
+#define STARFIVE_PRE_PLL_PCLK_DIV_C_SHIFT 5
+#define STARFIVE_PRE_PLL_PCLK_DIV_C_MASK GENMASK(6, 5)
+#define STARFIVE_PRE_PLL_PCLK_DIV_C(x) UPDATE(x, 6, 5)
+#define STARFIVE_PRE_PLL_PCLK_DIV_D_MASK GENMASK(4, 0)
+#define STARFIVE_PRE_PLL_PCLK_DIV_D(x) UPDATE(x, 4, 0)
+
+/* REG: 0x1a9 */
+#define STARFIVE_PRE_PLL_LOCK_STATUS 0x1a9
+
+/* REG: 0x1aa */
+#define STARFIVE_POST_PLL_DIV_1 0x1aa
+#define STARFIVE_POST_PLL_POST_DIV_ENABLE GENMASK(3, 2)
+#define STARFIVE_POST_PLL_REFCLK_SEL_TMDS BIT(1)
+#define STARFIVE_POST_PLL_POWER_DOWN BIT(0)
+#define STARFIVE_POST_PLL_FB_DIV_8(x) UPDATE(((x) >> 8) << 4, 4, 4)
+
+/* REG:0x1ab */
+#define STARFIVE_POST_PLL_DIV_2 0x1ab
+#define STARFIVE_POST_PLL_Pre_DIV_MASK GENMASK(5, 0)
+#define STARFIVE_POST_PLL_PRE_DIV(x) UPDATE(x, 5, 0)
+
+/* REG: 0x1ac */
+#define STARFIVE_POST_PLL_DIV_3 0x1ac
+#define STARFIVE_POST_PLL_FB_DIV_7_0(x) UPDATE(x, 7, 0)
+
+/* REG: 0x1ad */
+#define STARFIVE_POST_PLL_DIV_4 0x1ad
+#define STARFIVE_POST_PLL_POST_DIV_MASK GENMASK(2, 0)
+#define STARFIVE_POST_PLL_POST_DIV_2 0x0
+#define STARFIVE_POST_PLL_POST_DIV_4 0x1
+#define STARFIVE_POST_PLL_POST_DIV_8 0x3
+
+/* REG: 0x1af */
+#define STARFIVE_POST_PLL_LOCK_STATUS 0x1af
+
+/* REG: 0x1b0 */
+#define STARFIVE_BIAS_CONTROL 0x1b0
+#define STARFIVE_BIAS_ENABLE BIT(2)
+
+/* REG: 0x1b2 */
+#define STARFIVE_TMDS_CONTROL 0x1b2
+#define STARFIVE_TMDS_CLK_DRIVER_EN BIT(3)
+#define STARFIVE_TMDS_D2_DRIVER_EN BIT(2)
+#define STARFIVE_TMDS_D1_DRIVER_EN BIT(1)
+#define STARFIVE_TMDS_D0_DRIVER_EN BIT(0)
+#define STARFIVE_TMDS_DRIVER_ENABLE (STARFIVE_TMDS_CLK_DRIVER_EN | \
+ STARFIVE_TMDS_D2_DRIVER_EN | \
+ STARFIVE_TMDS_D1_DRIVER_EN | \
+ STARFIVE_TMDS_D0_DRIVER_EN)
+
+/* REG: 0x1b4 */
+#define STARFIVE_LDO_CONTROL 0x1b4
+#define STARFIVE_LDO_D2_EN BIT(2)
+#define STARFIVE_LDO_D1_EN BIT(1)
+#define STARFIVE_LDO_D0_EN BIT(0)
+#define STARFIVE_LDO_ENABLE (STARFIVE_LDO_D2_EN | \
+ STARFIVE_LDO_D1_EN | \
+ STARFIVE_LDO_D0_EN)
+
+/* REG: 0x1be */
+#define STARFIVE_SERIALIER_CONTROL 0x1be
+#define STARFIVE_SERIALIER_D2_EN BIT(6)
+#define STARFIVE_SERIALIER_D1_EN BIT(5)
+#define STARFIVE_SERIALIER_D0_EN BIT(4)
+#define STARFIVE_SERIALIER_EN BIT(0)
+
+#define STARFIVE_SERIALIER_ENABLE (STARFIVE_SERIALIER_D2_EN | \
+ STARFIVE_SERIALIER_D1_EN | \
+ STARFIVE_SERIALIER_D0_EN | \
+ STARFIVE_SERIALIER_EN)
+
+/* REG: 0x1cc */
+#define STARFIVE_RX_CONTROL 0x1cc
+#define STARFIVE_RX_EN BIT(3)
+#define STARFIVE_RX_CHANNEL_2_EN BIT(2)
+#define STARFIVE_RX_CHANNEL_1_EN BIT(1)
+#define STARFIVE_RX_CHANNEL_0_EN BIT(0)
+#define STARFIVE_RX_ENABLE (STARFIVE_RX_EN | \
+ STARFIVE_RX_CHANNEL_2_EN | \
+ STARFIVE_RX_CHANNEL_1_EN | \
+ STARFIVE_RX_CHANNEL_0_EN)
+
+/* REG: 0x1d1 */
+#define STARFIVE_PRE_PLL_FRAC_DIV_H 0x1d1
+#define STARFIVE_PRE_PLL_FRAC_DIV_23_16(x) UPDATE((x) >> 16, 7, 0)
+/* REG: 0x1d2 */
+#define STARFIVE_PRE_PLL_FRAC_DIV_M 0x1d2
+#define STARFIVE_PRE_PLL_FRAC_DIV_15_8(x) UPDATE((x) >> 8, 7, 0)
+/* REG: 0x1d3 */
+#define STARFIVE_PRE_PLL_FRAC_DIV_L 0x1d3
+#define STARFIVE_PRE_PLL_FRAC_DIV_7_0(x) UPDATE(x, 7, 0)
+
+#define PIXCLOCK_4K_30FPS 297000000
+
+enum hdmi_clk {
+ CLK_SYS = 0,
+ CLK_M,
+ CLK_B,
+ CLK_HDMI_NUM
+};
+
+struct pre_pll_config {
+ unsigned long pixclock;
+ unsigned long tmdsclock;
+ u8 prediv;
+ u16 fbdiv;
+ u8 tmds_div_a;
+ u8 tmds_div_b;
+ u8 tmds_div_c;
+ u8 pclk_div_a;
+ u8 pclk_div_b;
+ u8 pclk_div_c;
+ u8 pclk_div_d;
+ u8 vco_div_5_en;
+ u32 fracdiv;
+};
+
+struct post_pll_config {
+ unsigned long tmdsclock;
+ u8 prediv;
+ u16 fbdiv;
+ u8 postdiv;
+ u8 post_div_en;
+ u8 version;
+};
+
+struct phy_config {
+ unsigned long tmdsclock;
+ u8 regs[14];
+};
+
+struct starfive_hdmi_encoder {
+ struct drm_encoder encoder;
+ struct starfive_hdmi *hdmi;
+};
+
+struct starfive_hdmi_i2c {
+ struct i2c_adapter adap;
+
+ u8 ddc_addr;
+ u8 segment_addr;
+ /* protects the edid data when use i2c cmd to read edid */
+ struct mutex lock;
+ struct completion cmp;
+};
+
+struct starfive_hdmi {
+ struct device *dev;
+ struct drm_device *drm_dev;
+ struct drm_connector connector;
+ void __iomem *regs;
+
+ int irq;
+ struct clk_bulk_data clk_hdmi[CLK_HDMI_NUM];
+ struct reset_control *tx_rst;
+ int nclks;
+
+ struct i2c_adapter *ddc;
+ struct starfive_hdmi_i2c *i2c;
+
+ unsigned long tmds_rate;
+ struct pre_pll_config pre_cfg;
+ const struct post_pll_config *post_cfg;
+};
+
+#endif /* __STARFIVE_HDMI_H__ */
projects / platform / kernel / linux-starfive.git / commitdiff