On Fri, 05 Oct 2018, [email protected] wrote:
> From: Clint Taylor <[email protected]>
>
> HDMI Forum VSDB YCBCR420 deep color capability bits are 2:0. Correct
> definitions in the header for the mask to work correctly.
>
> Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=107893
> Signed-off-by: Clint Taylor <[email protected]>
When posting fixes like this, please do git blame on the stuff you're
fixing, and add Fixes: tag and a bunch of Cc's. It'll help us propagate
the fix to stable kernels and get feedback from the authors and
reviewers. 'dim fixes' will help you with this:
$ dim fixes e6a9a2c3dc437
Fixes: e6a9a2c3dc43 ("drm/edid: parse ycbcr 420 deep color information")
Cc: Ville Syrjälä <[email protected]>
Cc: Jose Abreu <[email protected]>
Cc: Shashank Sharma <[email protected]>
Cc: Gustavo Padovan <[email protected]>
Cc: Maarten Lankhorst <[email protected]>
Cc: Sean Paul <[email protected]>
Cc: David Airlie <[email protected]>
Cc: [email protected]
Cc: <[email protected]> # v4.14+
Anyway this looks sane to me,
Reviewed-by: Jani Nikula <[email protected]>
but I'm wondering if there was some deeper meaning to the original |= in
there.
BR,
Jani.
> ---
> drivers/gpu/drm/drm_edid.c | 2 +-
> include/drm/drm_edid.h | 6 +++---
> 2 files changed, 4 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
> index 1e2b940..ff0bfc6 100644
> --- a/drivers/gpu/drm/drm_edid.c
> +++ b/drivers/gpu/drm/drm_edid.c
> @@ -4282,7 +4282,7 @@ static void drm_parse_ycbcr420_deep_color_info(struct
> drm_connector *connector,
> struct drm_hdmi_info *hdmi = &connector->display_info.hdmi;
>
> dc_mask = db[7] & DRM_EDID_YCBCR420_DC_MASK;
> - hdmi->y420_dc_modes |= dc_mask;
> + hdmi->y420_dc_modes = dc_mask;
> }
>
> static void drm_parse_hdmi_forum_vsdb(struct drm_connector *connector,
> diff --git a/include/drm/drm_edid.h b/include/drm/drm_edid.h
> index b25d12e..e3c4048 100644
> --- a/include/drm/drm_edid.h
> +++ b/include/drm/drm_edid.h
> @@ -214,9 +214,9 @@ struct detailed_timing {
> #define DRM_EDID_HDMI_DC_Y444 (1 << 3)
>
> /* YCBCR 420 deep color modes */
> -#define DRM_EDID_YCBCR420_DC_48 (1 << 6)
> -#define DRM_EDID_YCBCR420_DC_36 (1 << 5)
> -#define DRM_EDID_YCBCR420_DC_30 (1 << 4)
> +#define DRM_EDID_YCBCR420_DC_48 (1 << 2)
> +#define DRM_EDID_YCBCR420_DC_36 (1 << 1)
> +#define DRM_EDID_YCBCR420_DC_30 (1 << 0)
> #define DRM_EDID_YCBCR420_DC_MASK (DRM_EDID_YCBCR420_DC_48 | \
> DRM_EDID_YCBCR420_DC_36 | \
> DRM_EDID_YCBCR420_DC_30)
--
Jani Nikula, Intel Open Source Graphics Center
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