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

[Neil Armstrong <narmstrong@xxxxxxxxxxxx>]

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@xxxxxxxxxxxx>
---
 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 43e375da131e8..0ec0cbe448e05 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