[PATCH 2/4] drm/bridge: dw-hdmi: Fix color space conversion detection

[Jernej Skrabec]

Currently, is_color_space_conversion() compares not only color spaces
but also formats. For example, function would return true if YCbCr 4:4:4
and YCbCr 4:2:2 would be set. Obviously in that case color spaces are
the same.

Fix that by comparing if both values represent RGB color space.

Fixes: b21f4b658df8 ("drm: imx: imx-hdmi: move imx-hdmi to bridge/dw_hdmi")
Signed-off-by: Jernej Skrabec <jernej.skrabec at siol.net>
---
 drivers/gpu/drm/bridge/synopsys/dw-hdmi.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
index 24965e53d351..9d7bfb1cb213 100644
--- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
+++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
@@ -956,7 +956,8 @@ static void hdmi_video_sample(struct dw_hdmi *hdmi)
 
 static int is_color_space_conversion(struct dw_hdmi *hdmi)
 {
-	return hdmi->hdmi_data.enc_in_bus_format != hdmi->hdmi_data.enc_out_bus_format;
+	return hdmi_bus_fmt_is_rgb(hdmi->hdmi_data.enc_in_bus_format) !=
+		hdmi_bus_fmt_is_rgb(hdmi->hdmi_data.enc_out_bus_format);
 }
 
 static int is_color_space_decimation(struct dw_hdmi *hdmi)
-- 
2.25.1