[PATCH v2 2/3] drm/msm/dp: Add support for setting the eDP mode from devicetree

[Abel Vesa <abel.vesa@linaro.org>]

Instead of relying on different compatibles for eDP and DP, use
the is-edp property from DT to figure out the connector type and
then pass on that information to the PHY.

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Abel Vesa <abel.vesa@linaro.org>
---
 drivers/gpu/drm/msm/dp/dp_ctrl.c    | 11 +++++++++++
 drivers/gpu/drm/msm/dp/dp_ctrl.h    |  1 +
 drivers/gpu/drm/msm/dp/dp_display.c | 17 ++++++++++++++---
 3 files changed, 26 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/msm/dp/dp_ctrl.c b/drivers/gpu/drm/msm/dp/dp_ctrl.c
index 320f17fce9a6..bd81cc6bd5e3 100644
--- a/drivers/gpu/drm/msm/dp/dp_ctrl.c
+++ b/drivers/gpu/drm/msm/dp/dp_ctrl.c
@@ -1533,6 +1533,17 @@ void dp_ctrl_set_psr(struct dp_ctrl *dp_ctrl, bool enter)
 	}
 }
 
+int dp_ctrl_phy_set_mode(struct dp_ctrl *dp_ctrl, int submode)
+{
+	struct dp_ctrl_private *ctrl;
+	struct phy *phy;
+
+	ctrl = container_of(dp_ctrl, struct dp_ctrl_private, dp_ctrl);
+	phy = ctrl->phy;
+
+	return phy_set_mode_ext(phy, PHY_MODE_DP, submode);
+}
+
 void dp_ctrl_phy_init(struct dp_ctrl *dp_ctrl)
 {
 	struct dp_ctrl_private *ctrl;
diff --git a/drivers/gpu/drm/msm/dp/dp_ctrl.h b/drivers/gpu/drm/msm/dp/dp_ctrl.h
index fa014cee7e21..a10d1b19d172 100644
--- a/drivers/gpu/drm/msm/dp/dp_ctrl.h
+++ b/drivers/gpu/drm/msm/dp/dp_ctrl.h
@@ -32,6 +32,7 @@ struct dp_ctrl *dp_ctrl_get(struct device *dev, struct dp_link *link,
 			struct phy *phy);
 
 void dp_ctrl_reset_irq_ctrl(struct dp_ctrl *dp_ctrl, bool enable);
+int dp_ctrl_phy_set_mode(struct dp_ctrl *dp_ctrl, int mode);
 void dp_ctrl_phy_init(struct dp_ctrl *dp_ctrl);
 void dp_ctrl_phy_exit(struct dp_ctrl *dp_ctrl);
 void dp_ctrl_irq_phy_exit(struct dp_ctrl *dp_ctrl);
diff --git a/drivers/gpu/drm/msm/dp/dp_display.c b/drivers/gpu/drm/msm/dp/dp_display.c
index e4433891becb..e01b41ad2e2a 100644
--- a/drivers/gpu/drm/msm/dp/dp_display.c
+++ b/drivers/gpu/drm/msm/dp/dp_display.c
@@ -1229,6 +1229,7 @@ static int dp_display_probe(struct platform_device *pdev)
 	int rc = 0;
 	struct dp_display_private *dp;
 	const struct msm_dp_desc *desc;
+	bool is_edp;
 
 	if (!pdev || !pdev->dev.of_node) {
 		DRM_ERROR("pdev not found\n");
@@ -1243,13 +1244,17 @@ static int dp_display_probe(struct platform_device *pdev)
 	if (!desc)
 		return -EINVAL;
 
+	is_edp = (desc->connector_type == DRM_MODE_CONNECTOR_eDP) ||
+		 of_property_read_bool(pdev->dev.of_node, "is-edp");
+
 	dp->dp_display.pdev = pdev;
 	dp->name = "drm_dp";
 	dp->id = desc->id;
-	dp->dp_display.connector_type = desc->connector_type;
+	dp->dp_display.connector_type = is_edp ?
+					DRM_MODE_CONNECTOR_eDP :
+					DRM_MODE_CONNECTOR_DisplayPort;
 	dp->wide_bus_en = desc->wide_bus_en;
-	dp->dp_display.is_edp =
-		(dp->dp_display.connector_type == DRM_MODE_CONNECTOR_eDP);
+	dp->dp_display.is_edp = is_edp;
 
 	rc = dp_init_sub_modules(dp);
 	if (rc) {
@@ -1257,6 +1262,12 @@ static int dp_display_probe(struct platform_device *pdev)
 		return -EPROBE_DEFER;
 	}
 
+	rc = dp_ctrl_phy_set_mode(dp->ctrl, is_edp ? PHY_SUBMODE_EDP : PHY_SUBMODE_DP);
+	if (rc) {
+		DRM_ERROR("setting PHY submode failed\n");
+		goto err;
+	}
+
 	/* setup event q */
 	mutex_init(&dp->event_mutex);
 	init_waitqueue_head(&dp->event_q);

-- 
2.34.1