The plat_data->input_bus_format and plat_data->input_bus_encoding are unsigned long and are alsways >=0, but the value 0 was still considered as RGB888 like the default behaviour.
This patch changes the if test to > 0. Thanks to Dan Carpenter for his bug report at [1]. Tested on Amlogic P230 (with CSC enabled for YUV444 to RGB) and Rockchip RK3288 ACT8846 EVB Board (no CSC involved, direct RGB passthrough). [1] http://lkml.kernel.org/r/20170406052120.GA26578@mwanda Cc: Dan Carpenter <[email protected]> Signed-off-by: Neil Armstrong <[email protected]> --- drivers/gpu/drm/bridge/synopsys/dw-hdmi.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c index 8b60503..100e1ee 100644 --- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c +++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c @@ -1668,14 +1668,14 @@ static int dw_hdmi_setup(struct dw_hdmi *hdmi, struct drm_display_mode *mode) hdmi->hdmi_data.video_mode.mpixelrepetitioninput = 0; /* TOFIX: Get input format from plat data or fallback to RGB888 */ - if (hdmi->plat_data->input_bus_format >= 0) + if (hdmi->plat_data->input_bus_format) hdmi->hdmi_data.enc_in_bus_format = hdmi->plat_data->input_bus_format; else hdmi->hdmi_data.enc_in_bus_format = MEDIA_BUS_FMT_RGB888_1X24; /* TOFIX: Get input encoding from plat data or fallback to none */ - if (hdmi->plat_data->input_bus_encoding >= 0) + if (hdmi->plat_data->input_bus_encoding) hdmi->hdmi_data.enc_in_encoding = hdmi->plat_data->input_bus_encoding; else -- 1.9.1
