Re: [PATCH V5 4/4] drm/xe/xe3p: Skip TD flush

["Thomas Hellström" <thomas.hellstrom@linux.intel.com>]

On Tue, 2026-03-03 at 11:54 +0530, Tejas Upadhyay wrote:
> Xe3p has HW ability to do transient display flush so the xe driver
> can
> enable this HW feature by default and skip the software TD flush.
> 
> Bspec: 60002
> Signed-off-by: Tejas Upadhyay <tejas.upadhyay@intel.com>

Reviewed-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>


> ---
>  drivers/gpu/drm/xe/xe_device.c | 8 ++++++++
>  1 file changed, 8 insertions(+)
> 
> diff --git a/drivers/gpu/drm/xe/xe_device.c
> b/drivers/gpu/drm/xe/xe_device.c
> index 94c9f17da4b4..0dca20133b94 100644
> --- a/drivers/gpu/drm/xe/xe_device.c
> +++ b/drivers/gpu/drm/xe/xe_device.c
> @@ -1166,6 +1166,14 @@ void xe_device_td_flush(struct xe_device *xe)
>  {
>  	struct xe_gt *root_gt;
>  
> +	/*
> +	 * From Xe3p onward the HW takes care of flush of TD entries
> also along
> +	 * with flushing XA entries, which will be at the usual sync
> points,
> +	 * like at the end of submission, so no manual flush is
> needed here.
> +	 */
> +	if (GRAPHICS_VER(xe) >= 35)
> +		return;
> +
>  	if (!IS_DGFX(xe) || GRAPHICS_VER(xe) < 20)
>  		return;
>