Thomas Zimmermann <tzimmermann@xxxxxxx> writes:
Hello Thomas,
Thanks a lot for your feedback.
> Hi
>
> Am 09.11.23 um 18:24 schrieb Javier Martinez Canillas:
>> To be used by drivers that do per-buffer (e.g: virtio-gpu) uploads (rather
>> than per-plane uploads), since these type of drivers need to handle buffer
>> damages instead of frame damages.
>>
>> The drm_atomic_helper_buffer_damage_iter_init() has the same logic than
>> drm_atomic_helper_damage_iter_init() but it also takes into account if the
>> framebuffer attached to plane's state has changed since the last update.
>>
>> And the drm_atomic_helper_buffer_damage_merged() is just a version of the
>> drm_atomic_helper_damage_merged() helper, but it uses the iter_init helper
>> that is mentioned above.
>>
>> Fixes: 01f05940a9a7 ("drm/virtio: Enable fb damage clips property for the primary plane")
>> Cc: <stable@xxxxxxxxxxxxxxx> # v6.4+
>> Reported-by: nerdopolis <bluescreen_avenger@xxxxxxxxxxx>
>> Closes: https://bugzilla.kernel.org/show_bug.cgi?id=218115
>> Suggested-by: Sima Vetter <daniel.vetter@xxxxxxxx>
>> Signed-off-by: Javier Martinez Canillas <javierm@xxxxxxxxxx>
>> ---
>>
>> drivers/gpu/drm/drm_damage_helper.c | 79 ++++++++++++++++++++++++++---
>> include/drm/drm_damage_helper.h | 7 +++
>> 2 files changed, 80 insertions(+), 6 deletions(-)
>>
>> diff --git a/drivers/gpu/drm/drm_damage_helper.c b/drivers/gpu/drm/drm_damage_helper.c
>> index aa2325567918..b72062c9d31c 100644
>> --- a/drivers/gpu/drm/drm_damage_helper.c
>> +++ b/drivers/gpu/drm/drm_damage_helper.c
>> @@ -204,7 +204,8 @@ EXPORT_SYMBOL(drm_atomic_helper_dirtyfb);
>> static void
>> __drm_atomic_helper_damage_iter_init(struct drm_atomic_helper_damage_iter *iter,
>> const struct drm_plane_state *old_state,
>> - const struct drm_plane_state *state)
>> + const struct drm_plane_state *state,
>> + bool buffer_damage)
>
> I think it would be preferable to drop patches one and two and instead
> add this parameter directly to drm_atomic_helper_damage_iter_init() and
> drm_atomic_helper_damage_merged(). That's a bit of churn, but more
> readable code.
>
Makes sense. I'll do that in v2.
> Best regards
> Thomas
>
--
Best regards,
Javier Martinez Canillas
Core Platforms
Red Hat
