[Intel-gfx] [PATCH v5 02/17] drm: add YCBCR 420 capability identifier

[Ville Syrjälä]

On Tue, Jul 04, 2017 at 07:41:49PM +0530, Shashank Sharma wrote:
> This patch adds a bool variable (ycbcr_420_allowed) in the drm connector
> structure. While handling the EDID from HDMI 2.0 sinks, its important to
> know if the source is capable of handling YCBCR 420 outputs or not, so that
> a lot of work can be done/bypassed based on this information. One such
> example is adding YCBCR420 only modes.
> 
> If the driver knows that this source is not HDMI 2.0 capable, it will
> not add YCBCR420-only modes while adding EDID modes, and will prevent
> any runtime modeset failures.
> 
> This variable will be initialized from I915 driver in the next patch
> and will be used in the EDID handling for HDMI 2.0 specific features,
> in this same series.
> 
> V3: introduced the new variable
> V4: changed variable name from is_hdmi2_src to ycbcr_420_allowed (Ville)
> V4: adding r-b from Neil.
> 
> Reviewed-by: Neil Armstrong <narmstrong at baylibre.com>
> Signed-off-by: Shashank Sharma <shashank.sharma at intel.com>
> ---
>  include/drm/drm_connector.h | 9 +++++++++
>  1 file changed, 9 insertions(+)
> 
> diff --git a/include/drm/drm_connector.h b/include/drm/drm_connector.h
> index ae5b7dc..8a78aaa 100644
> --- a/include/drm/drm_connector.h
> +++ b/include/drm/drm_connector.h
> @@ -726,6 +726,15 @@ struct drm_connector {
>  	bool interlace_allowed;
>  	bool doublescan_allowed;
>  	bool stereo_allowed;
> +
> +	/**
> +	 * @ycbcr_420_allowed : This bool indicates if this connector is
> +	 * capable of handling YCBCR 420 output. While parsing the EDID
> +	 * blocks, its very helpful to know, if the source is capable of
> +	 * handling YCBCR 420 outputs.
> +	 */
> +	bool ycbcr_420_allowed;
> +

This patch should be squashed with the patch that actually needs this flag.

>  	/**
>  	 * @registered: Is this connector exposed (registered) with userspace?
>  	 * Protected by @mutex.
> -- 
> 2.7.4
> 
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-- 
Ville Syrjälä
Intel OTC