[PATCH v17 3/6] drm/bridge: dw-hdmi: filter out YUV output formats when DVI

[H. Nikolaus Schaller]

From: Neil Armstrong <narmstrong at baylibre.com>

When the display is not an HDMI sink, only the RGB output format is
valid. Thus stop returning YUV output formats when sink is not HDMI.

Fixes: 6c3c719936da ("drm/bridge: synopsys: dw-hdmi: add bus format negociation")
Signed-off-by: Neil Armstrong <narmstrong at baylibre.com>
Signed-off-by: H. Nikolaus Schaller <hns at goldelico.com>
---
 drivers/gpu/drm/bridge/synopsys/dw-hdmi.c | 17 +++++++++--------
 1 file changed, 9 insertions(+), 8 deletions(-)

diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
index a563460f8d209..f50af40e10340 100644
--- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
+++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
@@ -2538,6 +2538,7 @@ static u32 *dw_hdmi_bridge_atomic_get_output_bus_fmts(struct drm_bridge *bridge,
 	struct drm_connector *conn = conn_state->connector;
 	struct drm_display_info *info = &conn->display_info;
 	struct drm_display_mode *mode = &crtc_state->mode;
+	struct dw_hdmi *hdmi = bridge->driver_private;
 	u8 max_bpc = conn_state->max_requested_bpc;
 	bool is_hdmi2_sink = info->hdmi.scdc.supported ||
 			     (info->color_formats & DRM_COLOR_FORMAT_YCBCR420);
@@ -2564,7 +2565,7 @@ static u32 *dw_hdmi_bridge_atomic_get_output_bus_fmts(struct drm_bridge *bridge,
 	 * If the current mode enforces 4:2:0, force the output but format
 	 * to 4:2:0 and do not add the YUV422/444/RGB formats
 	 */
-	if (conn->ycbcr_420_allowed &&
+	if (hdmi->sink_is_hdmi && conn->ycbcr_420_allowed &&
 	    (drm_mode_is_420_only(info, mode) ||
 	     (is_hdmi2_sink && drm_mode_is_420_also(info, mode)))) {
 
@@ -2595,36 +2596,36 @@ static u32 *dw_hdmi_bridge_atomic_get_output_bus_fmts(struct drm_bridge *bridge,
 	 */
 
 	if (max_bpc >= 16 && info->bpc == 16) {
-		if (info->color_formats & DRM_COLOR_FORMAT_YCBCR444)
+		if (hdmi->sink_is_hdmi && info->color_formats & DRM_COLOR_FORMAT_YCBCR444)
 			output_fmts[i++] = MEDIA_BUS_FMT_YUV16_1X48;
 
 		output_fmts[i++] = MEDIA_BUS_FMT_RGB161616_1X48;
 	}
 
 	if (max_bpc >= 12 && info->bpc >= 12) {
-		if (info->color_formats & DRM_COLOR_FORMAT_YCBCR422)
+		if (hdmi->sink_is_hdmi && info->color_formats & DRM_COLOR_FORMAT_YCBCR422)
 			output_fmts[i++] = MEDIA_BUS_FMT_UYVY12_1X24;
 
-		if (info->color_formats & DRM_COLOR_FORMAT_YCBCR444)
+		if (hdmi->sink_is_hdmi && info->color_formats & DRM_COLOR_FORMAT_YCBCR444)
 			output_fmts[i++] = MEDIA_BUS_FMT_YUV12_1X36;
 
 		output_fmts[i++] = MEDIA_BUS_FMT_RGB121212_1X36;
 	}
 
 	if (max_bpc >= 10 && info->bpc >= 10) {
-		if (info->color_formats & DRM_COLOR_FORMAT_YCBCR422)
+		if (hdmi->sink_is_hdmi && info->color_formats & DRM_COLOR_FORMAT_YCBCR422)
 			output_fmts[i++] = MEDIA_BUS_FMT_UYVY10_1X20;
 
-		if (info->color_formats & DRM_COLOR_FORMAT_YCBCR444)
+		if (hdmi->sink_is_hdmi && info->color_formats & DRM_COLOR_FORMAT_YCBCR444)
 			output_fmts[i++] = MEDIA_BUS_FMT_YUV10_1X30;
 
 		output_fmts[i++] = MEDIA_BUS_FMT_RGB101010_1X30;
 	}
 
-	if (info->color_formats & DRM_COLOR_FORMAT_YCBCR422)
+	if (hdmi->sink_is_hdmi && info->color_formats & DRM_COLOR_FORMAT_YCBCR422)
 		output_fmts[i++] = MEDIA_BUS_FMT_UYVY8_1X16;
 
-	if (info->color_formats & DRM_COLOR_FORMAT_YCBCR444)
+	if (hdmi->sink_is_hdmi && info->color_formats & DRM_COLOR_FORMAT_YCBCR444)
 		output_fmts[i++] = MEDIA_BUS_FMT_YUV8_1X24;
 
 	/* Default 8bit RGB fallback */
-- 
2.33.0