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drm/rockchip: dw_hdmi: add regulator support 

The RK3568 has HDMI_TX_AVDD0V9 and HDMI_TX_AVDD_1V8 supply inputs needed
for the HDMI port. add support for these to the driver for boards which
have them supplied by switchable regulators.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Reviewed-by: Dmitry Osipenko <dmitry.osipenko@collabora.com>
Tested-by: Michael Riesch <michael.riesch@wolfvision.net>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20220422072841.2206452-10-s.hauer@pengutronix.de
This commit is contained in:
Sascha Hauer 2022-04-22 09:28:26 +02:00 committed by Heiko Stuebner
parent 80266ccb86
commit ca80c4eb4b
1 changed files with 38 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

41
drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c
View File

@ -9,6 +9,7 @@
#include <linux/platform_device.h>
#include <linux/phy/phy.h>
#include <linux/regmap.h>
#include <linux/regulator/consumer.h>
#include <drm/bridge/dw_hdmi.h>
#include <drm/drm_edid.h>
@ -76,6 +77,8 @@ struct rockchip_hdmi {
struct clk *ref_clk;
struct clk *grf_clk;
struct dw_hdmi *hdmi;
struct regulator *avdd_0v9;
struct regulator *avdd_1v8;
struct phy *phy;
};
@ -226,6 +229,14 @@ static int rockchip_hdmi_parse_dt(struct rockchip_hdmi *hdmi)
return PTR_ERR(hdmi->grf_clk);
}
hdmi->avdd_0v9 = devm_regulator_get(hdmi->dev, "avdd-0v9");
if (IS_ERR(hdmi->avdd_0v9))
return PTR_ERR(hdmi->avdd_0v9);
hdmi->avdd_1v8 = devm_regulator_get(hdmi->dev, "avdd-1v8");
if (IS_ERR(hdmi->avdd_1v8))
return PTR_ERR(hdmi->avdd_1v8);
return 0;
}
@ -566,11 +577,23 @@ static int dw_hdmi_rockchip_bind(struct device *dev, struct device *master,
return ret;
}
ret = regulator_enable(hdmi->avdd_0v9);
if (ret) {
DRM_DEV_ERROR(hdmi->dev, "failed to enable avdd0v9: %d\n", ret);
goto err_avdd_0v9;
}
ret = regulator_enable(hdmi->avdd_1v8);
if (ret) {
DRM_DEV_ERROR(hdmi->dev, "failed to enable avdd1v8: %d\n", ret);
goto err_avdd_1v8;
}
ret = clk_prepare_enable(hdmi->ref_clk);
if (ret) {
DRM_DEV_ERROR(hdmi->dev, "Failed to enable HDMI reference clock: %d\n",
ret);
return ret;
goto err_clk;
}
if (hdmi->chip_data == &rk3568_chip_data) {
@ -594,10 +617,19 @@ static int dw_hdmi_rockchip_bind(struct device *dev, struct device *master,
*/
if (IS_ERR(hdmi->hdmi)) {
ret = PTR_ERR(hdmi->hdmi);
drm_encoder_cleanup(encoder);
clk_disable_unprepare(hdmi->ref_clk);
goto err_bind;
}
return 0;
err_bind:
drm_encoder_cleanup(encoder);
clk_disable_unprepare(hdmi->ref_clk);
err_clk:
regulator_disable(hdmi->avdd_1v8);
err_avdd_1v8:
regulator_disable(hdmi->avdd_0v9);
err_avdd_0v9:
return ret;
}
@ -608,6 +640,9 @@ static void dw_hdmi_rockchip_unbind(struct device *dev, struct device *master,
dw_hdmi_unbind(hdmi->hdmi);
clk_disable_unprepare(hdmi->ref_clk);
regulator_disable(hdmi->avdd_1v8);
regulator_disable(hdmi->avdd_0v9);
}
static const struct component_ops dw_hdmi_rockchip_ops = {