[RFC 05/21] drm: bridge/dw_hdmi: Fix R-Car Gen3 device support
Ulrich Hecht
ulrich.hecht+renesas at gmail.com
Mon May 30 16:00:04 UTC 2016
From: Koji Matsuoka <koji.matsuoka.xm at renesas.com>
Signed-off-by: Koji Matsuoka <koji.matsuoka.xm at renesas.com>
Signed-off-by: Geert Uytterhoeven <geert+renesas at glider.be>
---
drivers/gpu/drm/bridge/dw-hdmi.c | 158 ++++++++++++++++++++++++++++++---------
include/drm/bridge/dw_hdmi.h | 9 +++
2 files changed, 131 insertions(+), 36 deletions(-)
diff --git a/drivers/gpu/drm/bridge/dw-hdmi.c b/drivers/gpu/drm/bridge/dw-hdmi.c
index 1cfff2f..55e73e8 100644
--- a/drivers/gpu/drm/bridge/dw-hdmi.c
+++ b/drivers/gpu/drm/bridge/dw-hdmi.c
@@ -1,6 +1,7 @@
/*
* DesignWare High-Definition Multimedia Interface (HDMI) driver
*
+ * Copyright (C) 2015 Renesas Electronics Corporation
* Copyright (C) 2013-2015 Mentor Graphics Inc.
* Copyright (C) 2011-2013 Freescale Semiconductor, Inc.
* Copyright (C) 2010, Guennadi Liakhovetski <g.liakhovetski at gmx.de>
@@ -21,6 +22,7 @@
#include <linux/of_device.h>
#include <linux/spinlock.h>
+#include <drm/drm_atomic_helper.h>
#include <drm/drm_of.h>
#include <drm/drmP.h>
#include <drm/drm_atomic_helper.h>
@@ -143,6 +145,7 @@ struct dw_hdmi {
struct device *dev;
struct clk *isfr_clk;
struct clk *iahb_clk;
+
struct dw_hdmi_i2c *i2c;
struct hdmi_data_info hdmi_data;
@@ -174,6 +177,11 @@ struct dw_hdmi {
unsigned int audio_cts;
unsigned int audio_n;
bool audio_enable;
+ int ratio;
+ bool interlaced;
+ bool isfr_use;
+ bool iahb_use;
+ int num;
void (*write)(struct dw_hdmi *hdmi, u8 val, int offset);
u8 (*read)(struct dw_hdmi *hdmi, int offset);
@@ -1008,6 +1016,7 @@ static int hdmi_phy_configure(struct dw_hdmi *hdmi, unsigned char prep,
const struct dw_hdmi_mpll_config *mpll_config = pdata->mpll_cfg;
const struct dw_hdmi_curr_ctrl *curr_ctrl = pdata->cur_ctr;
const struct dw_hdmi_phy_config *phy_config = pdata->phy_config;
+ const struct dw_hdmi_multi_div *multi_div = pdata->multi_div;
if (prep)
return -EINVAL;
@@ -1043,6 +1052,13 @@ static int hdmi_phy_configure(struct dw_hdmi *hdmi, unsigned char prep,
phy_config->mpixelclock)
break;
+ if (hdmi->dev_type == RCAR_HDMI) {
+ for (; multi_div->mpixelclock != (~0UL); multi_div++)
+ if (hdmi->hdmi_data.video_mode.mpixelclock <=
+ multi_div->mpixelclock)
+ break;
+ }
+
if (mpll_config->mpixelclock == ~0UL ||
curr_ctrl->mpixelclock == ~0UL ||
phy_config->mpixelclock == ~0UL) {
@@ -1051,6 +1067,13 @@ static int hdmi_phy_configure(struct dw_hdmi *hdmi, unsigned char prep,
return -EINVAL;
}
+ if ((multi_div->mpixelclock == ~0UL) &&
+ (hdmi->dev_type == RCAR_HDMI)) {
+ dev_err(hdmi->dev, "Pixel clock %d - unsupported by HDMI\n",
+ hdmi->hdmi_data.video_mode.mpixelclock);
+ return -EINVAL;
+ }
+
/* Enable csc path */
if (cscon)
val = HDMI_MC_FLOWCTRL_FEED_THROUGH_OFF_CSC_IN_PATH;
@@ -1077,21 +1100,27 @@ static int hdmi_phy_configure(struct dw_hdmi *hdmi, unsigned char prep,
hdmi_phy_test_clear(hdmi, 0);
hdmi_phy_i2c_write(hdmi, mpll_config->res[res_idx].cpce, 0x06);
- hdmi_phy_i2c_write(hdmi, mpll_config->res[res_idx].gmp, 0x15);
+ if (hdmi->dev_type != RCAR_HDMI)
+ hdmi_phy_i2c_write(hdmi, mpll_config->res[res_idx].gmp, 0x15);
/* CURRCTRL */
hdmi_phy_i2c_write(hdmi, curr_ctrl->curr[res_idx], 0x10);
- hdmi_phy_i2c_write(hdmi, 0x0000, 0x13); /* PLLPHBYCTRL */
- hdmi_phy_i2c_write(hdmi, 0x0006, 0x17);
-
- hdmi_phy_i2c_write(hdmi, phy_config->term, 0x19); /* TXTERM */
- hdmi_phy_i2c_write(hdmi, phy_config->sym_ctr, 0x09); /* CKSYMTXCTRL */
- hdmi_phy_i2c_write(hdmi, phy_config->vlev_ctr, 0x0E); /* VLEVCTRL */
+ if (hdmi->dev_type == RCAR_HDMI)
+ hdmi_phy_i2c_write(hdmi, multi_div->multi[res_idx], 0x11);
- /* REMOVE CLK TERM */
- hdmi_phy_i2c_write(hdmi, 0x8000, 0x05); /* CKCALCTRL */
+ if (hdmi->dev_type != RCAR_HDMI) {
+ hdmi_phy_i2c_write(hdmi, 0x0000, 0x13); /* PLLPHBYCTRL */
+ hdmi_phy_i2c_write(hdmi, 0x0006, 0x17);
+ hdmi_phy_i2c_write(hdmi, phy_config->term, 0x19); /* TXTERM */
+ hdmi_phy_i2c_write(hdmi, phy_config->sym_ctr,
+ 0x09); /* CKSYMTXCTRL */
+ hdmi_phy_i2c_write(hdmi, phy_config->vlev_ctr,
+ 0x0E); /* VLEVCTRL */
+ /* REMOVE CLK TERM */
+ hdmi_phy_i2c_write(hdmi, 0x8000, 0x05); /* CKCALCTRL */
+ }
dw_hdmi_phy_enable_powerdown(hdmi, false);
/* toggle TMDS enable */
@@ -1102,7 +1131,8 @@ static int hdmi_phy_configure(struct dw_hdmi *hdmi, unsigned char prep,
dw_hdmi_phy_gen2_txpwron(hdmi, 1);
dw_hdmi_phy_gen2_pddq(hdmi, 0);
- if (hdmi->dev_type == RK3288_HDMI)
+ if ((hdmi->dev_type == RK3288_HDMI) ||
+ (hdmi->dev_type == RCAR_HDMI))
dw_hdmi_phy_enable_spare(hdmi, 1);
/*Wait for PHY PLL lock */
@@ -1791,6 +1821,16 @@ static const struct drm_connector_funcs dw_hdmi_atomic_connector_funcs = {
.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
};
+static struct drm_connector_funcs dw_hdmi_rcar_connector_funcs = {
+ .dpms = drm_atomic_helper_connector_dpms,
+ .fill_modes = drm_helper_probe_single_connector_modes,
+ .detect = dw_hdmi_connector_detect,
+ .destroy = dw_hdmi_connector_destroy,
+ .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 const struct drm_connector_helper_funcs dw_hdmi_connector_helper_funcs = {
.get_modes = dw_hdmi_connector_get_modes,
.mode_valid = dw_hdmi_connector_mode_valid,
@@ -1940,16 +1980,23 @@ static int dw_hdmi_register(struct drm_device *drm, struct dw_hdmi *hdmi)
encoder->bridge = bridge;
hdmi->connector.polled = DRM_CONNECTOR_POLL_HPD;
+ if (hdmi->interlaced)
+ hdmi->connector.interlace_allowed = true;
+
drm_connector_helper_add(&hdmi->connector,
&dw_hdmi_connector_helper_funcs);
if (drm_core_check_feature(drm, DRIVER_ATOMIC))
drm_connector_init(drm, &hdmi->connector,
- &dw_hdmi_atomic_connector_funcs,
+ hdmi->dev_type == RCAR_HDMI ?
+ &dw_hdmi_rcar_connector_funcs :
+ &dw_hdmi_atomic_connector_funcs,
DRM_MODE_CONNECTOR_HDMIA);
else
drm_connector_init(drm, &hdmi->connector,
- &dw_hdmi_connector_funcs,
+ hdmi->dev_type == RCAR_HDMI ?
+ &dw_hdmi_rcar_connector_funcs :
+ &dw_hdmi_connector_funcs,
DRM_MODE_CONNECTOR_HDMIA);
drm_mode_connector_attach_encoder(&hdmi->connector, encoder);
@@ -2006,6 +2053,11 @@ int dw_hdmi_bind(struct device *dev, struct device *master,
return -EINVAL;
}
+ if (of_property_read_u32(np, "interlaced", &val) == 0)
+ hdmi->interlaced = val;
+ else
+ hdmi->interlaced = false;
+
ddc_node = of_parse_phandle(np, "ddc-i2c-bus", 0);
if (ddc_node) {
hdmi->ddc = of_find_i2c_adapter_by_node(ddc_node);
@@ -2023,30 +2075,59 @@ int dw_hdmi_bind(struct device *dev, struct device *master,
if (IS_ERR(hdmi->regs))
return PTR_ERR(hdmi->regs);
- hdmi->isfr_clk = devm_clk_get(hdmi->dev, "isfr");
- if (IS_ERR(hdmi->isfr_clk)) {
- ret = PTR_ERR(hdmi->isfr_clk);
- dev_err(hdmi->dev, "Unable to get HDMI isfr clk: %d\n", ret);
- return ret;
- }
+ if (of_property_read_u32(np, "clock-isfr", &val) == 0)
+ hdmi->isfr_use = val;
+ else
+ hdmi->isfr_use = true;
- ret = clk_prepare_enable(hdmi->isfr_clk);
- if (ret) {
- dev_err(hdmi->dev, "Cannot enable HDMI isfr clock: %d\n", ret);
- return ret;
- }
+ if (hdmi->isfr_use) {
+ if (of_property_read_u32(np, "hdmi-num", &val) == 0)
+ hdmi->num = val;
+ else
+ hdmi->num = -1;
+
+ if (hdmi->num > 1) {
+ char name[7];
+
+ sprintf(name, "isfr.%u", hdmi->plat_data->index);
+ hdmi->isfr_clk = devm_clk_get(hdmi->dev, name);
+ } else
+ hdmi->isfr_clk = devm_clk_get(hdmi->dev, "isfr");
+ if (IS_ERR(hdmi->isfr_clk)) {
+ ret = PTR_ERR(hdmi->isfr_clk);
+ dev_err(hdmi->dev,
+ "Unable to get HDMI isfr clk: %d\n", ret);
+ return ret;
+ }
- hdmi->iahb_clk = devm_clk_get(hdmi->dev, "iahb");
- if (IS_ERR(hdmi->iahb_clk)) {
- ret = PTR_ERR(hdmi->iahb_clk);
- dev_err(hdmi->dev, "Unable to get HDMI iahb clk: %d\n", ret);
- goto err_isfr;
+ ret = clk_prepare_enable(hdmi->isfr_clk);
+ if (ret) {
+ dev_err(hdmi->dev,
+ "Cannot enable HDMI isfr clock: %d\n", ret);
+ return ret;
+ }
}
- ret = clk_prepare_enable(hdmi->iahb_clk);
- if (ret) {
- dev_err(hdmi->dev, "Cannot enable HDMI iahb clock: %d\n", ret);
- goto err_isfr;
+ if (of_property_read_u32(np, "clock-iahb", &val) == 0)
+ hdmi->iahb_use = val;
+ else
+ hdmi->iahb_use = true;
+
+ if (hdmi->iahb_use) {
+ hdmi->iahb_clk = devm_clk_get(hdmi->dev, "iahb");
+ if (IS_ERR(hdmi->iahb_clk)) {
+ ret = PTR_ERR(hdmi->iahb_clk);
+ dev_err(hdmi->dev,
+ "Unable to get HDMI iahb clk: %d\n", ret);
+ goto err_isfr;
+ }
+
+ ret = clk_prepare_enable(hdmi->iahb_clk);
+ if (ret) {
+ dev_err(hdmi->dev,
+ "Cannot enable HDMI iahb clock: %d\n", ret);
+ goto err_isfr;
+ }
}
/* Product and revision IDs */
@@ -2130,9 +2211,11 @@ err_iahb:
if (hdmi->i2c)
i2c_del_adapter(&hdmi->i2c->adap);
- clk_disable_unprepare(hdmi->iahb_clk);
+ if (hdmi->iahb_use)
+ clk_disable_unprepare(hdmi->iahb_clk);
err_isfr:
- clk_disable_unprepare(hdmi->isfr_clk);
+ if (hdmi->isfr_use)
+ clk_disable_unprepare(hdmi->isfr_clk);
return ret;
}
@@ -2151,8 +2234,11 @@ void dw_hdmi_unbind(struct device *dev, struct device *master, void *data)
hdmi->connector.funcs->destroy(&hdmi->connector);
hdmi->encoder->funcs->destroy(hdmi->encoder);
- clk_disable_unprepare(hdmi->iahb_clk);
- clk_disable_unprepare(hdmi->isfr_clk);
+ if (hdmi->iahb_use)
+ clk_disable_unprepare(hdmi->iahb_clk);
+
+ if (hdmi->isfr_use)
+ clk_disable_unprepare(hdmi->isfr_clk);
if (hdmi->i2c)
i2c_del_adapter(&hdmi->i2c->adap);
diff --git a/include/drm/bridge/dw_hdmi.h b/include/drm/bridge/dw_hdmi.h
index bae79f3..a620cab 100644
--- a/include/drm/bridge/dw_hdmi.h
+++ b/include/drm/bridge/dw_hdmi.h
@@ -1,4 +1,5 @@
/*
+ * Copyright (C) 2015 Renesas Electronics Corporation
* Copyright (C) 2011 Freescale Semiconductor, Inc.
*
* This program is free software; you can redistribute it and/or modify
@@ -25,6 +26,7 @@ enum dw_hdmi_devtype {
IMX6Q_HDMI,
IMX6DL_HDMI,
RK3288_HDMI,
+ RCAR_HDMI,
};
struct dw_hdmi_mpll_config {
@@ -40,6 +42,11 @@ struct dw_hdmi_curr_ctrl {
u16 curr[DW_HDMI_RES_MAX];
};
+struct dw_hdmi_multi_div {
+ unsigned long mpixelclock;
+ u16 multi[DW_HDMI_RES_MAX];
+};
+
struct dw_hdmi_phy_config {
unsigned long mpixelclock;
u16 sym_ctr; /*clock symbol and transmitter control*/
@@ -51,9 +58,11 @@ struct dw_hdmi_plat_data {
enum dw_hdmi_devtype dev_type;
const struct dw_hdmi_mpll_config *mpll_cfg;
const struct dw_hdmi_curr_ctrl *cur_ctr;
+ const struct dw_hdmi_multi_div *multi_div;
const struct dw_hdmi_phy_config *phy_config;
enum drm_mode_status (*mode_valid)(struct drm_connector *connector,
struct drm_display_mode *mode);
+ u32 index;
};
void dw_hdmi_unbind(struct device *dev, struct device *master, void *data);
--
2.7.4
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