Fwd: [PATCH v5 4/6] drm/rockchip: dw_hdmi: allow including external phys

Some variants of the dw-hdmi on Rockchip socs use a separate phy block
accessed via the generic phy framework, so allow them to be included
if such a phy reference is found.

Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Tested-by: Robin Murphy <robin.murphy@arm.com>
---
?drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c | 10 ++++++++++
?1 file changed, 10 insertions(+)

diff --git a/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c 

b/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c
index b09c3531305b..57e76dfd5f6d 100644

--- a/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c
+++ b/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c

@@ -11,6 +11,7 @@

?#include <linux/mfd/syscon.h>
?#include <linux/module.h>
?#include <linux/platform_device.h>
+#include <linux/phy/phy.h>
?#include <linux/regmap.h>
? #include <drm/drm_of.h>

@@ -49,6 +50,7 @@ struct rockchip_hdmi {

???? struct clk *vpll_clk;
???? struct clk *grf_clk;
???? struct dw_hdmi *hdmi;
+??? struct phy *phy;
?};
? #define to_rockchip_hdmi(x)??? container_of(x, struct rockchip_hdmi, x)

@@ -376,6 +378,14 @@ static int dw_hdmi_rockchip_bind(struct device 

*dev, struct device *master,
???????? return ret;
???? }
?+??? hdmi->phy = devm_phy_optional_get(dev, "hdmi");
+??? if (IS_ERR(hdmi->phy)) {
+??????? ret = PTR_ERR(hdmi->phy);
+??????? if (ret != -EPROBE_DEFER)
+??????????? DRM_DEV_ERROR(hdmi->dev, "failed to get phy\n");
+??????? return ret;
+??? }
+
???? drm_encoder_helper_add(encoder, 
&dw_hdmi_rockchip_encoder_helper_funcs);
???? drm_encoder_init(drm, encoder, &dw_hdmi_rockchip_encoder_funcs,
????????????? DRM_MODE_ENCODER_TMDS, NULL);