[PATCH 12/22] drm: bridge: dw-hdmi: Abstract the platform PHY configuration
Laurent Pinchart
laurent.pinchart+renesas at ideasonboard.com
Thu Dec 1 23:43:27 UTC 2016
From: Kieran Bingham <kieran.bingham+renesas at ideasonboard.com>
Platforms implement the dw-hdmi with a separate PHY entity. It is
configured over it's own I2C bus. To allow for different PHY's to be
configured from the dw-hdmi driver, abstract the actual programming of
the PHY to its own functions, as configured by the platform.
Signed-off-by: Kieran Bingham <kieran.bingham+renesas at ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas at ideasonboard.com>
---
drivers/gpu/drm/bridge/dw-hdmi.c | 79 ++++++++++++++++++-----------
drivers/gpu/drm/imx/dw_hdmi-imx.c | 2 +
drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c | 1 +
include/drm/bridge/dw_hdmi.h | 12 +++++
4 files changed, 63 insertions(+), 31 deletions(-)
diff --git a/drivers/gpu/drm/bridge/dw-hdmi.c b/drivers/gpu/drm/bridge/dw-hdmi.c
index 074ceb1e4897..06a44a2cdf3b 100644
--- a/drivers/gpu/drm/bridge/dw-hdmi.c
+++ b/drivers/gpu/drm/bridge/dw-hdmi.c
@@ -867,8 +867,8 @@ static bool hdmi_phy_wait_i2c_done(struct dw_hdmi *hdmi, int msec)
return true;
}
-static void hdmi_phy_i2c_write(struct dw_hdmi *hdmi, unsigned short data,
- unsigned char addr)
+void dw_hdmi_phy_i2c_write(struct dw_hdmi *hdmi, unsigned short data,
+ unsigned char addr)
{
hdmi_writeb(hdmi, 0xFF, HDMI_IH_I2CMPHY_STAT0);
hdmi_writeb(hdmi, addr, HDMI_PHY_I2CM_ADDRESS_ADDR);
@@ -880,6 +880,7 @@ static void hdmi_phy_i2c_write(struct dw_hdmi *hdmi, unsigned short data,
HDMI_PHY_I2CM_OPERATION_ADDR);
hdmi_phy_wait_i2c_done(hdmi, 1000);
}
+EXPORT_SYMBOL_GPL(dw_hdmi_phy_i2c_write);
static void dw_hdmi_phy_enable_powerdown(struct dw_hdmi *hdmi, bool enable)
{
@@ -930,38 +931,61 @@ static void dw_hdmi_phy_sel_interface_control(struct dw_hdmi *hdmi, u8 enable)
HDMI_PHY_CONF0_SELDIPIF_MASK);
}
-static int hdmi_phy_configure(struct dw_hdmi *hdmi,
- enum dw_hdmi_resolution res_idx, int cscon)
+int dw_hdmi_phy_configure_synopsys(struct dw_hdmi *hdmi,
+ const struct dw_hdmi_plat_data *pdata,
+ unsigned long mpixelclock,
+ enum dw_hdmi_resolution resolution)
+
{
- u8 val, msec;
- const struct dw_hdmi_plat_data *pdata = hdmi->plat_data;
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;
/* PLL/MPLL Cfg - always match on final entry */
for (; mpll_config->mpixelclock != ~0UL; mpll_config++)
- if (hdmi->hdmi_data.video_mode.mpixelclock <=
- mpll_config->mpixelclock)
+ if (mpixelclock <= mpll_config->mpixelclock)
break;
for (; curr_ctrl->mpixelclock != ~0UL; curr_ctrl++)
- if (hdmi->hdmi_data.video_mode.mpixelclock <=
- curr_ctrl->mpixelclock)
+ if (mpixelclock <= curr_ctrl->mpixelclock)
break;
for (; phy_config->mpixelclock != ~0UL; phy_config++)
- if (hdmi->hdmi_data.video_mode.mpixelclock <=
- phy_config->mpixelclock)
+ if (mpixelclock <= phy_config->mpixelclock)
break;
if (mpll_config->mpixelclock == ~0UL ||
curr_ctrl->mpixelclock == ~0UL ||
- phy_config->mpixelclock == ~0UL) {
- dev_err(hdmi->dev, "Pixel clock %d - unsupported by HDMI\n",
- hdmi->hdmi_data.video_mode.mpixelclock);
+ phy_config->mpixelclock == ~0UL)
return -EINVAL;
- }
+
+ dw_hdmi_phy_i2c_write(hdmi, mpll_config->res[resolution].cpce, 0x06);
+ dw_hdmi_phy_i2c_write(hdmi, mpll_config->res[resolution].gmp, 0x15);
+
+ /* CURRCTRL */
+ dw_hdmi_phy_i2c_write(hdmi, curr_ctrl->curr[resolution], 0x10);
+
+ dw_hdmi_phy_i2c_write(hdmi, 0x0000, 0x13); /* PLLPHBYCTRL */
+ dw_hdmi_phy_i2c_write(hdmi, 0x0006, 0x17);
+
+ dw_hdmi_phy_i2c_write(hdmi, phy_config->term, 0x19); /* TXTERM */
+ dw_hdmi_phy_i2c_write(hdmi, phy_config->sym_ctr, 0x09); /* CKSYMTXCTRL */
+ dw_hdmi_phy_i2c_write(hdmi, phy_config->vlev_ctr, 0x0E); /* VLEVCTRL */
+
+ /* REMOVE CLK TERM */
+ dw_hdmi_phy_i2c_write(hdmi, 0x8000, 0x05); /* CKCALCTRL */
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(dw_hdmi_phy_configure_synopsys);
+
+static int hdmi_phy_configure(struct dw_hdmi *hdmi,
+ enum dw_hdmi_resolution resolution, int cscon)
+{
+ const struct dw_hdmi_plat_data *pdata = hdmi->plat_data;
+ unsigned long mpixelclock = hdmi->hdmi_data.video_mode.mpixelclock;
+ u8 val, msec;
+ int ret;
/* Enable csc path */
if (cscon)
@@ -988,21 +1012,14 @@ static int hdmi_phy_configure(struct dw_hdmi *hdmi,
HDMI_PHY_I2CM_SLAVE_ADDR);
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);
-
- /* 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 */
-
- /* REMOVE CLK TERM */
- hdmi_phy_i2c_write(hdmi, 0x8000, 0x05); /* CKCALCTRL */
+ /* Write to the PHY as configured by the platform */
+ ret = pdata->configure_phy(hdmi, pdata, mpixelclock, resolution);
+ if (ret) {
+ dev_err(hdmi->dev,
+ "PHY configuration failed (clock %lu resolution %u)\n",
+ mpixelclock, resolution);
+ return ret;
+ }
dw_hdmi_phy_enable_powerdown(hdmi, false);
diff --git a/drivers/gpu/drm/imx/dw_hdmi-imx.c b/drivers/gpu/drm/imx/dw_hdmi-imx.c
index f645275e6e63..f1cb25c429cf 100644
--- a/drivers/gpu/drm/imx/dw_hdmi-imx.c
+++ b/drivers/gpu/drm/imx/dw_hdmi-imx.c
@@ -177,6 +177,7 @@ static struct dw_hdmi_plat_data imx6q_hdmi_drv_data = {
.phy_config = imx_phy_config,
.dev_type = IMX6Q_HDMI,
.mode_valid = imx6q_hdmi_mode_valid,
+ .configure_phy = dw_hdmi_phy_configure_synopsys,
};
static struct dw_hdmi_plat_data imx6dl_hdmi_drv_data = {
@@ -185,6 +186,7 @@ static struct dw_hdmi_plat_data imx6dl_hdmi_drv_data = {
.phy_config = imx_phy_config,
.dev_type = IMX6DL_HDMI,
.mode_valid = imx6dl_hdmi_mode_valid,
+ .configure_phy = dw_hdmi_phy_configure_synopsys,
};
static const struct of_device_id dw_hdmi_imx_dt_ids[] = {
diff --git a/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c b/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c
index a6d4a0236e8f..55b1f2f27d6e 100644
--- a/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c
+++ b/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c
@@ -237,6 +237,7 @@ static const struct dw_hdmi_plat_data rockchip_hdmi_drv_data = {
.mpll_cfg = rockchip_mpll_cfg,
.cur_ctr = rockchip_cur_ctr,
.phy_config = rockchip_phy_config,
+ .configure_phy = dw_hdmi_phy_configure_synopsys,
.dev_type = RK3288_HDMI,
};
diff --git a/include/drm/bridge/dw_hdmi.h b/include/drm/bridge/dw_hdmi.h
index e551b457c100..fa7655836c81 100644
--- a/include/drm/bridge/dw_hdmi.h
+++ b/include/drm/bridge/dw_hdmi.h
@@ -52,6 +52,10 @@ struct dw_hdmi_plat_data {
const struct dw_hdmi_mpll_config *mpll_cfg;
const struct dw_hdmi_curr_ctrl *cur_ctr;
const struct dw_hdmi_phy_config *phy_config;
+ int (*configure_phy)(struct dw_hdmi *hdmi,
+ const struct dw_hdmi_plat_data *pdata,
+ unsigned long mpixelclock,
+ enum dw_hdmi_resolution resolution);
enum drm_mode_status (*mode_valid)(struct drm_connector *connector,
struct drm_display_mode *mode);
};
@@ -67,4 +71,12 @@ void dw_hdmi_set_sample_rate(struct dw_hdmi *hdmi, unsigned int rate);
void dw_hdmi_audio_enable(struct dw_hdmi *hdmi);
void dw_hdmi_audio_disable(struct dw_hdmi *hdmi);
+/* PHY configuration */
+void dw_hdmi_phy_i2c_write(struct dw_hdmi *hdmi, unsigned short data,
+ unsigned char addr);
+int dw_hdmi_phy_configure_synopsys(struct dw_hdmi *hdmi,
+ const struct dw_hdmi_plat_data *pdata,
+ unsigned long mpixelclock,
+ enum dw_hdmi_resolution resolution);
+
#endif /* __IMX_HDMI_H__ */
--
Regards,
Laurent Pinchart
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