Re: [Intel-gfx] [PATCH] drm/i915: Support Async Flip on Linear buffers

["Ville Syrjälä" <ville.syrjala@linux.intel.com>]

On Tue, Apr 26, 2022 at 05:34:07PM +0530, Arun R Murthy wrote:
> Starting from Gen12 Async Flip is supported on linear buffers.

It's supported earlier than that. But IIRC there was some kind of
GTT alignment vs. async flip vs. FBC restriction that we weren't
handling.

> This patch enables support for async on linear buffer.
> 
> Signed-off-by: Arun R Murthy <arun.r.murthy@intel.com>
> ---
>  drivers/gpu/drm/i915/display/intel_display.c | 7 +++++++
>  1 file changed, 7 insertions(+)
> 
> diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
> index 0decf3d24237..e3bf250b85e4 100644
> --- a/drivers/gpu/drm/i915/display/intel_display.c
> +++ b/drivers/gpu/drm/i915/display/intel_display.c
> @@ -7522,6 +7522,13 @@ static int intel_async_flip_check_hw(struct intel_atomic_state *state, struct in
>  		 * this selectively if required.
>  		 */
>  		switch (new_plane_state->hw.fb->modifier) {
> +		case DRM_FORMAT_MOD_LINEAR:
> +			if (DISPLAY_VER(i915) < 12) {
> +				drm_dbg_kms(&i915->drm,
> +					"[PLANE:%d:%s] Modifier does not support async flips\n",
> +					plane->base.base.id, plane->base.name);
> +				return -EINVAL;
> +			}
>  		case I915_FORMAT_MOD_X_TILED:
>  		case I915_FORMAT_MOD_Y_TILED:
>  		case I915_FORMAT_MOD_Yf_TILED:
> -- 
> 2.25.1

-- 
Ville Syrjälä
Intel