diff mbox series

[v2,3/4] drm: panel: simple: Drop drive/sample bus flags for LVDS panels

Message ID 20200629233320.8774-4-laurent.pinchart+renesas@ideasonboard.com (mailing list archive)
State New, archived
Headers show
Series drm: panel: simple: Fix mistakes in panel descriptions | expand

Commit Message

Laurent Pinchart June 29, 2020, 11:33 p.m. UTC 
The DRM bus flags reporting on which clock edge the pixel data and sync
signals are sampled or driven don't make sense for LVDS panels, as the
bus then uses sub-clock timings to send data. Drop those flags and add a
warning in the probe function to make sure the mistake won't be
repeated.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
---
Changes since v1:

- White list flags instead of black listing them
---
 drivers/gpu/drm/panel/panel-simple.c | 28 +++++++++++++++++-----------
 1 file changed, 17 insertions(+), 11 deletions(-)
diff mbox series

Patch

diff --git a/drivers/gpu/drm/panel/panel-simple.c b/drivers/gpu/drm/panel/panel-simple.c
index c659d8262e5c..cd416376bf71 100644
--- a/drivers/gpu/drm/panel/panel-simple.c
+++ b/drivers/gpu/drm/panel/panel-simple.c
@@ -549,6 +549,14 @@  static int panel_simple_probe(struct device *dev, const struct panel_desc *desc)
 			panel_simple_parse_panel_timing_node(dev, panel, &dt);
 	}
 
+	if (desc->connector_type == DRM_MODE_CONNECTOR_LVDS)
+		/* Catch common mistakes for LVDS panels. */
+		WARN_ON(desc->bus_flags &
+			~(DRM_BUS_FLAG_DE_LOW |
+			  DRM_BUS_FLAG_DE_HIGH |
+			  DRM_BUS_FLAG_DATA_MSB_TO_LSB |
+			  DRM_BUS_FLAG_DATA_LSB_TO_MSB));
+
 	drm_panel_init(&panel->base, dev, &panel_simple_funcs,
 		       desc->connector_type);
 
@@ -688,7 +696,7 @@  static const struct panel_desc auo_b101aw03 = {
 		.height = 125,
 	},
 	.bus_format = MEDIA_BUS_FMT_RGB666_1X7X3_SPWG,
-	.bus_flags = DRM_BUS_FLAG_DE_HIGH | DRM_BUS_FLAG_PIXDATA_DRIVE_POSEDGE,
+	.bus_flags = DRM_BUS_FLAG_DE_HIGH,
 	.connector_type = DRM_MODE_CONNECTOR_LVDS,
 };
 
@@ -1398,7 +1406,7 @@  static const struct panel_desc chunghwa_claa070wp03xg = {
 		.height = 150,
 	},
 	.bus_format = MEDIA_BUS_FMT_RGB666_1X7X3_SPWG,
-	.bus_flags = DRM_BUS_FLAG_DE_HIGH | DRM_BUS_FLAG_PIXDATA_DRIVE_POSEDGE,
+	.bus_flags = DRM_BUS_FLAG_DE_HIGH,
 	.connector_type = DRM_MODE_CONNECTOR_LVDS,
 };
 
@@ -1423,7 +1431,7 @@  static const struct panel_desc chunghwa_claa101wa01a = {
 		.height = 120,
 	},
 	.bus_format = MEDIA_BUS_FMT_RGB666_1X7X3_SPWG,
-	.bus_flags = DRM_BUS_FLAG_DE_HIGH | DRM_BUS_FLAG_PIXDATA_DRIVE_POSEDGE,
+	.bus_flags = DRM_BUS_FLAG_DE_HIGH,
 	.connector_type = DRM_MODE_CONNECTOR_LVDS,
 };
 
@@ -1448,7 +1456,7 @@  static const struct panel_desc chunghwa_claa101wb01 = {
 		.height = 125,
 	},
 	.bus_format = MEDIA_BUS_FMT_RGB666_1X7X3_SPWG,
-	.bus_flags = DRM_BUS_FLAG_DE_HIGH | DRM_BUS_FLAG_PIXDATA_DRIVE_POSEDGE,
+	.bus_flags = DRM_BUS_FLAG_DE_HIGH,
 	.connector_type = DRM_MODE_CONNECTOR_LVDS,
 };
 
@@ -2123,7 +2131,7 @@  static const struct panel_desc innolux_n156bge_l21 = {
 		.height = 193,
 	},
 	.bus_format = MEDIA_BUS_FMT_RGB666_1X7X3_SPWG,
-	.bus_flags = DRM_BUS_FLAG_DE_HIGH | DRM_BUS_FLAG_PIXDATA_DRIVE_POSEDGE,
+	.bus_flags = DRM_BUS_FLAG_DE_HIGH,
 	.connector_type = DRM_MODE_CONNECTOR_LVDS,
 };
 
@@ -2256,7 +2264,7 @@  static const struct panel_desc koe_tx26d202vm0bwa = {
 		.disable = 1000,
 	},
 	.bus_format = MEDIA_BUS_FMT_RGB888_1X7X4_SPWG,
-	.bus_flags = DRM_BUS_FLAG_DE_HIGH | DRM_BUS_FLAG_PIXDATA_DRIVE_POSEDGE,
+	.bus_flags = DRM_BUS_FLAG_DE_HIGH,
 	.connector_type = DRM_MODE_CONNECTOR_LVDS,
 };
 
@@ -2497,9 +2505,7 @@  static const struct panel_desc logictechno_lt170410_2whc = {
 		.height = 136,
 	},
 	.bus_format = MEDIA_BUS_FMT_RGB888_1X7X4_SPWG,
-	.bus_flags = DRM_BUS_FLAG_DE_HIGH |
-		     DRM_BUS_FLAG_PIXDATA_SAMPLE_NEGEDGE |
-		     DRM_BUS_FLAG_SYNC_SAMPLE_NEGEDGE,
+	.bus_flags = DRM_BUS_FLAG_DE_HIGH,
 	.connector_type = DRM_MODE_CONNECTOR_LVDS,
 };
 
@@ -3072,7 +3078,7 @@  static const struct panel_desc samsung_ltn101nt05 = {
 		.height = 125,
 	},
 	.bus_format = MEDIA_BUS_FMT_RGB666_1X7X3_SPWG,
-	.bus_flags = DRM_BUS_FLAG_DE_HIGH | DRM_BUS_FLAG_PIXDATA_DRIVE_POSEDGE,
+	.bus_flags = DRM_BUS_FLAG_DE_HIGH,
 	.connector_type = DRM_MODE_CONNECTOR_LVDS,
 };
 
@@ -3512,7 +3518,7 @@  static const struct panel_desc toshiba_lt089ac29000 = {
 		.height = 116,
 	},
 	.bus_format = MEDIA_BUS_FMT_RGB888_1X7X4_JEIDA,
-	.bus_flags = DRM_BUS_FLAG_DE_HIGH | DRM_BUS_FLAG_PIXDATA_DRIVE_POSEDGE,
+	.bus_flags = DRM_BUS_FLAG_DE_HIGH,
 	.connector_type = DRM_MODE_CONNECTOR_LVDS,
 };