[PATCH 2/5] drm/msm/dsi: Refer to connected device as 'device' instead of 'panel'

[Archit Taneja]

We currently support only panels connected to dsi output. We're going to
also support external bridge chips now.

Change 'panel_node' to 'device_node' in the struct msm_dsi_host and
'panel_flags' to 'device_flags' in msm_dsi. This makes things sound a
bit more generic.

Signed-off-by: Archit Taneja <architt at codeaurora.org>
---
 drivers/gpu/drm/msm/dsi/dsi.c         |  2 +-
 drivers/gpu/drm/msm/dsi/dsi.h         |  2 +-
 drivers/gpu/drm/msm/dsi/dsi_host.c    | 31 +++++++++++++++++--------------
 drivers/gpu/drm/msm/dsi/dsi_manager.c |  4 ++--
 4 files changed, 21 insertions(+), 18 deletions(-)

diff --git a/drivers/gpu/drm/msm/dsi/dsi.c b/drivers/gpu/drm/msm/dsi/dsi.c
index 1f2561e..9f5fe59 100644
--- a/drivers/gpu/drm/msm/dsi/dsi.c
+++ b/drivers/gpu/drm/msm/dsi/dsi.c
@@ -18,7 +18,7 @@ struct drm_encoder *msm_dsi_get_encoder(struct msm_dsi *msm_dsi)
 	if (!msm_dsi || !msm_dsi->panel)
 		return NULL;
 
-	return (msm_dsi->panel_flags & MIPI_DSI_MODE_VIDEO) ?
+	return (msm_dsi->device_flags & MIPI_DSI_MODE_VIDEO) ?
 		msm_dsi->encoders[MSM_DSI_VIDEO_ENCODER_ID] :
 		msm_dsi->encoders[MSM_DSI_CMD_ENCODER_ID];
 }
diff --git a/drivers/gpu/drm/msm/dsi/dsi.h b/drivers/gpu/drm/msm/dsi/dsi.h
index 5e29aad..2bf4859 100644
--- a/drivers/gpu/drm/msm/dsi/dsi.h
+++ b/drivers/gpu/drm/msm/dsi/dsi.h
@@ -59,7 +59,7 @@ struct msm_dsi {
 	struct mipi_dsi_host *host;
 	struct msm_dsi_phy *phy;
 	struct drm_panel *panel;
-	unsigned long panel_flags;
+	unsigned long device_flags;
 
 	struct device *phy_dev;
 	bool phy_enabled;
diff --git a/drivers/gpu/drm/msm/dsi/dsi_host.c b/drivers/gpu/drm/msm/dsi/dsi_host.c
index 3785083f..e5a44e7 100644
--- a/drivers/gpu/drm/msm/dsi/dsi_host.c
+++ b/drivers/gpu/drm/msm/dsi/dsi_host.c
@@ -213,8 +213,8 @@ struct msm_dsi_host {
 
 	struct drm_display_mode *mode;
 
-	/* Panel info */
-	struct device_node *panel_node;
+	/* connected device info */
+	struct device_node *device_node;
 	unsigned int channel;
 	unsigned int lanes;
 	enum mipi_dsi_pixel_format format;
@@ -1385,7 +1385,7 @@ static int dsi_host_attach(struct mipi_dsi_host *host,
 	msm_host->format = dsi->format;
 	msm_host->mode_flags = dsi->mode_flags;
 
-	WARN_ON(dsi->dev.of_node != msm_host->panel_node);
+	WARN_ON(dsi->dev.of_node != msm_host->device_node);
 
 	/* Some gpios defined in panel DT need to be controlled by host */
 	ret = dsi_host_init_panel_gpios(msm_host, &dsi->dev);
@@ -1404,7 +1404,7 @@ static int dsi_host_detach(struct mipi_dsi_host *host,
 {
 	struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
 
-	msm_host->panel_node = NULL;
+	msm_host->device_node = NULL;
 
 	DBG("id=%d", msm_host->id);
 	if (msm_host->dev)
@@ -1439,7 +1439,7 @@ static int msm_dsi_host_parse_dt(struct msm_dsi_host *msm_host)
 {
 	struct device *dev = &msm_host->pdev->dev;
 	struct device_node *np = dev->of_node;
-	struct device_node *endpoint, *panel_node;
+	struct device_node *endpoint, *device_node;
 	int ret;
 
 	ret = of_property_read_u32(np, "qcom,dsi-host-index", &msm_host->id);
@@ -1451,7 +1451,7 @@ static int msm_dsi_host_parse_dt(struct msm_dsi_host *msm_host)
 
 	/*
 	 * get the first endpoint node. in our case, dsi has one output port
-	 * to which the panel is connected.
+	 * to which the device is connected.
 	 */
 	endpoint = of_graph_get_next_endpoint(np, NULL);
 	if (IS_ERR(endpoint)) {
@@ -1459,18 +1459,21 @@ static int msm_dsi_host_parse_dt(struct msm_dsi_host *msm_host)
 		return PTR_ERR(endpoint);
 	}
 
-	/* get panel node from the output port's endpoint data */
-	panel_node = of_graph_get_remote_port_parent(endpoint);
-	if (IS_ERR(panel_node)) {
+	/*
+	 * get connected device(panel/bridge) node from the output port's
+	 * endpoint data
+	 */
+	device_node = of_graph_get_remote_port_parent(endpoint);
+	if (IS_ERR(device_node)) {
 		dev_err(dev, "%s: no valid device\n", __func__);
 		of_node_put(endpoint);
-		return PTR_ERR(panel_node);
+		return PTR_ERR(device_node);
 	}
 
 	of_node_put(endpoint);
-	of_node_put(panel_node);
+	of_node_put(device_node);
 
-	msm_host->panel_node = panel_node;
+	msm_host->device_node = device_node;
 
 	return 0;
 }
@@ -1622,7 +1625,7 @@ int msm_dsi_host_register(struct mipi_dsi_host *host, bool check_defer)
 		 * create framebuffer.
 		 */
 		if (check_defer) {
-			if (!of_drm_find_panel(msm_host->panel_node))
+			if (!of_drm_find_panel(msm_host->device_node))
 				return -EPROBE_DEFER;
 		}
 	}
@@ -2032,7 +2035,7 @@ struct drm_panel *msm_dsi_host_get_panel(struct mipi_dsi_host *host,
 	struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
 	struct drm_panel *panel;
 
-	panel = of_drm_find_panel(msm_host->panel_node);
+	panel = of_drm_find_panel(msm_host->device_node);
 	if (panel_flags)
 			*panel_flags = msm_host->mode_flags;
 
diff --git a/drivers/gpu/drm/msm/dsi/dsi_manager.c b/drivers/gpu/drm/msm/dsi/dsi_manager.c
index bd247b7..ec8db80 100644
--- a/drivers/gpu/drm/msm/dsi/dsi_manager.c
+++ b/drivers/gpu/drm/msm/dsi/dsi_manager.c
@@ -156,7 +156,7 @@ static enum drm_connector_status dsi_mgr_connector_detect(
 	DBG("id=%d", id);
 	if (!msm_dsi->panel) {
 		msm_dsi->panel = msm_dsi_host_get_panel(msm_dsi->host,
-						&msm_dsi->panel_flags);
+						&msm_dsi->device_flags);
 
 		/* There is only 1 panel in the global panel list
 		 * for dual DSI mode. Therefore slave dsi should get
@@ -177,7 +177,7 @@ static enum drm_connector_status dsi_mgr_connector_detect(
 		 */
 		if (msm_dsi->panel && IS_DUAL_DSI() &&
 			other_dsi && other_dsi->panel) {
-			bool cmd_mode = !(msm_dsi->panel_flags &
+			bool cmd_mode = !(msm_dsi->device_flags &
 						MIPI_DSI_MODE_VIDEO);
 			struct drm_encoder *encoder = msm_dsi_get_encoder(
 					dsi_mgr_get_dsi(DSI_ENCODER_MASTER));
-- 
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