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SubjectRe: [PATCH 6/7] drm/msm/a5xx: Disable flat shading optimization
On Sat, Sep 26, 2020 at 5:52 AM <kholk11@gmail.com> wrote:
>
> From: Konrad Dybcio <konradybcio@gmail.com>
>
> Port over the command from downstream to prevent undefined
> behaviour.
>
> Signed-off-by: Konrad Dybcio <konradybcio@gmail.com>
> Signed-off-by: AngeloGioacchino Del Regno <kholk11@gmail.com>
> ---
> drivers/gpu/drm/msm/adreno/a5xx_gpu.c | 3 +++
> 1 file changed, 3 insertions(+)
>
> diff --git a/drivers/gpu/drm/msm/adreno/a5xx_gpu.c b/drivers/gpu/drm/msm/adreno/a5xx_gpu.c
> index b2670af638a3..bdc852e7d979 100644
> --- a/drivers/gpu/drm/msm/adreno/a5xx_gpu.c
> +++ b/drivers/gpu/drm/msm/adreno/a5xx_gpu.c
> @@ -759,6 +759,9 @@ static int a5xx_hw_init(struct msm_gpu *gpu)
> adreno_is_a540(adreno_gpu))
> gpu_write(gpu, REG_A5XX_UCHE_DBG_ECO_CNTL_2, bit);
>
> + /* Disable All flat shading optimization */
> + gpu_rmw(gpu, 0x00000E60, 0, 0x1 << 10);

Looks like VPC_DBG_ECO_CNTL.ALLFLATOPTDIS (based on downstream
41582a1f24d2961094c556db788028b433d8476a)

BR,
-R

> +
> /* Protect registers from the CP */
> gpu_write(gpu, REG_A5XX_CP_PROTECT_CNTL, 0x00000007);
>
> --
> 2.28.0
>

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