[PATCH v5] drm/msm/a8xx: Add UBWC v6 support

[Konrad Dybcio]

On 1/21/26 5:01 PM, Akhil P Oommen wrote:
> Adreno 840 GPU supports UBWC v6. Add support for this.
> 
> Signed-off-by: Akhil P Oommen <akhilpo at oss.qualcomm.com>
> ---
> << Trimmed the cover letter since b4 folds it into the single patch >>
> 
> This series adds the A8xx HWL along with Adreno 840 GPU support to the
> drm-msm driver. A8x is the next generation in the Adreno family,
> featuring a significant hardware design change. A major update to the
> design is the introduction of 'Slice' architecture. Slices are sort of
> mini-GPUs within the GPU which are more independent in processing Graphics
> and compute workloads. Also, in addition to the BV and BR pipe we saw in
> A7x, CP has more concurrency with additional pipes.
> 
> The single pending patch in this series in now ready to pick up into
> the msm-next.
> ---
> Changes in v5:
> - Dropped merged patches
> - Rebased on top of msm-next tip
> - Link to v4: https://lore.kernel.org/r/20251118-kaana-gpu-support-v4-0-86eeb8e93fb6@oss.qualcomm.com
> ---
>  drivers/gpu/drm/msm/adreno/a8xx_gpu.c | 4 ++++
>  1 file changed, 4 insertions(+)
> 
> diff --git a/drivers/gpu/drm/msm/adreno/a8xx_gpu.c b/drivers/gpu/drm/msm/adreno/a8xx_gpu.c
> index 30de078e9dfd..5a320f5bde41 100644
> --- a/drivers/gpu/drm/msm/adreno/a8xx_gpu.c
> +++ b/drivers/gpu/drm/msm/adreno/a8xx_gpu.c
> @@ -276,6 +276,10 @@ static void a8xx_set_ubwc_config(struct msm_gpu *gpu)
>  	u8 uavflagprd_inv = 2;
>  
>  	switch (ubwc_version) {
> +	case UBWC_6_0:
> +		yuvnotcomptofc = true;
> +		mode = 5;

Downstream agrees (and they do a better job of using field_xyz than
us this time around, I'm impressed)

Reviewed-by: Konrad Dybcio <konrad.dybcio at oss.qualcomm.com>

Konrad