Hi,
On Mon, Mar 29, 2021 at 06:50:46PM +0100, Paul Cercueil wrote:
> Avoid requesting a full modeset if the sharpness property is not
> modified, because then we don't actually need it.
>
> Fixes: fc1acf317b01 ("drm/ingenic: Add support for the IPU")
> Cc: <stable@xxxxxxxxxxxxxxx> # 5.8+
> Signed-off-by: Paul Cercueil <paul@xxxxxxxxxxxxxxx>
> ---
> drivers/gpu/drm/ingenic/ingenic-ipu.c | 4 +++-
> 1 file changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/ingenic/ingenic-ipu.c b/drivers/gpu/drm/ingenic/ingenic-ipu.c
> index 3b1091e7c0cd..95b665c4a7b0 100644
> --- a/drivers/gpu/drm/ingenic/ingenic-ipu.c
> +++ b/drivers/gpu/drm/ingenic/ingenic-ipu.c
> @@ -640,10 +640,12 @@ ingenic_ipu_plane_atomic_set_property(struct drm_plane *plane,
> {
> struct ingenic_ipu *ipu = plane_to_ingenic_ipu(plane);
> struct drm_crtc_state *crtc_state;
> + bool mode_changed;
>
> if (property != ipu->sharpness_prop)
> return -EINVAL;
>
> + mode_changed = val != ipu->sharpness;
> ipu->sharpness = val;
>
> if (state->crtc) {
> @@ -651,7 +653,7 @@ ingenic_ipu_plane_atomic_set_property(struct drm_plane *plane,
> if (WARN_ON(!crtc_state))
> return -EINVAL;
>
> - crtc_state->mode_changed = true;
> + crtc_state->mode_changed |= mode_changed;
> }
I'd just change the condition from
if (state->crtc)
to
if (state->crtc && val != ipu->sharpness)
It's going to be easier to extend if you ever need to. Also, drivers
usually do this in atomic_check, is there a specific reason to do it in
atomic_set_property?
Maxime
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