[PATCH v3 0/4] Use no_vblank property for drivers without VBLANK

[Thomas Zimmermann]

Hi

Am 21.01.20 um 10:36 schrieb Gerd Hoffmann:
> On Mon, Jan 20, 2020 at 01:20:47PM +0100, Thomas Zimmermann wrote:
>> Instead of faking VBLANK events by themselves, drivers without VBLANK
>> support can enable drm_crtc_vblank.no_vblank and let DRM do the rest.
>> The patchset makes this official and converts over drivers.
>>
>> The current implementation looks at the number of initialized CRTCs
>> wrt vblanking. If vblanking has been initialized for a CRTC, the driver
>> is responsible for sending out VBLANK events. Otherwise, DRM will send
>> out the event. The behaviour selected by initializing no_vblank as part
>> of drm_atomic_helper_check_modeset().
>>
>> I went through all drivers, looking for those that call send out VBLANK
>> events but do not call drm_vblank_init(). These are converted to the new
>> semantics. This affects tiny drivers; drivers for virtual hardware; and
>> a few others, which do not support interrupts. Xen comes with its
>> own VBLANK logic and disables no_vblank explictly.
> 
> Acked-by: Gerd Hoffmann <kraxel at redhat.com>

Thanks a lot. v4 will mostly reorganize the patches so I'll keep your A-b.

Best regards
Thomas

> 
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-- 
Thomas Zimmermann
Graphics Driver Developer
SUSE Software Solutions Germany GmbH
Maxfeldstr. 5, 90409 Nürnberg, Germany
(HRB 36809, AG Nürnberg)
Geschäftsführer: Felix Imendörffer

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