[RFC 2/5] drm: uapi: Add HDMI 2.0 aspect ratio flags and HDMI 2.0+ mode flag

[Jose Abreu]

Hi Ville,


On 23-03-2017 19:00, Ville Syrjälä wrote:
> On Thu, Mar 23, 2017 at 06:54:52PM +0000, Jose Abreu wrote:
>> Hi Ville,
>>
>>
>> On 23-03-2017 15:16, Ville Syrjälä wrote:
>>> On Wed, Mar 22, 2017 at 05:35:58PM +0000, Jose Abreu wrote:
>>>> Add the HDMI 2.0 aspect ratio flags (64:27 and 256:135) and a new
>>>> flag which will signal userspace that this is a HDMI 2.0+ mode. It
>>>> is expected that these new flags will not be exported to userspace
>>>> unless client asks to.
>>> W.r.t. the aspect ratio userspace story, there was some discussion
>>> on #dri-devel recently about extending the xrandr protocol for 3d stereo
>>> support. If that is going to happen then it might make sense to try
>>> and get the aspect ratio stuff also included at the same time so
>>> that we would only have to deal with one protocol bump.
>> Hmm, are you saying to just use one knob for 3d and the aspect
>> ratios?
> No. I'm saying that extending xrandr with either means a protocol bump.
> But if we do both at the same time we just need one bump.

Ok. Anything in this series that you think can start helping
contribute for that?

Best regards,
Jose Miguel Abreu

>
>> Aren't there already userspace consumers of the 3d knob?
> Not that I know of. And there's definitely nothing in xrandr for this
> stuff, so any consumer would have to be something non-x11 based.
>
>> Best regards,
>> Jose Miguel Abreu
>>
>>>> Signed-off-by: Jose Abreu <joabreu at synopsys.com>
>>>> Cc: Carlos Palminha <palminha at synopsys.com>
>>>> Cc: dri-devel at lists.freedesktop.org
>>>> ---
>>>>  include/uapi/drm/drm_mode.h | 9 +++++++++
>>>>  1 file changed, 9 insertions(+)
>>>>
>>>> diff --git a/include/uapi/drm/drm_mode.h b/include/uapi/drm/drm_mode.h
>>>> index 8c67fc0..62e679c 100644
>>>> --- a/include/uapi/drm/drm_mode.h
>>>> +++ b/include/uapi/drm/drm_mode.h
>>>> @@ -89,6 +89,8 @@
>>>>  #define DRM_MODE_PICTURE_ASPECT_NONE		0
>>>>  #define DRM_MODE_PICTURE_ASPECT_4_3		1
>>>>  #define DRM_MODE_PICTURE_ASPECT_16_9		2
>>>> +#define DRM_MODE_PICTURE_ASPECT_64_27		3
>>>> +#define DRM_MODE_PICTURE_ASPECT_256_135		4
>>>>  
>>>>  /* Aspect ratio flag bitmask (4 bits 22:19) */
>>>>  #define DRM_MODE_FLAG_PIC_AR_MASK		(0x0F<<19)
>>>> @@ -98,6 +100,13 @@
>>>>  			(DRM_MODE_PICTURE_ASPECT_4_3<<19)
>>>>  #define  DRM_MODE_FLAG_PIC_AR_16_9 \
>>>>  			(DRM_MODE_PICTURE_ASPECT_16_9<<19)
>>>> +#define  DRM_MODE_FLAG_PIC_AR_64_27 \
>>>> +			(DRM_MODE_PICTURE_ASPECT_64_27<<19)
>>>> +#define  DRM_MODE_FLAG_PIC_AR_256_135 \
>>>> +			(DRM_MODE_PICTURE_ASPECT_256_135<<19)
>>>> +
>>>> +/* HDMI 2.0+ mode flag: will only be set if client supports it */
>>>> +#define DRM_MODE_FLAG_HDMI2			(1<<23)
>>>>  
>>>>  /* DPMS flags */
>>>>  /* bit compatible with the xorg definitions. */
>>>> -- 
>>>> 1.9.1
>>>>
>>>>
>>>> _______________________________________________
>>>> dri-devel mailing list
>>>> dri-devel at lists.freedesktop.org
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