Re: [PATCH] drm/msm/a8xx: Fix 1/2b alpha filtering precision
From: Akhil P Oommen
Date: Wed Nov 04 2026 - 23:00:17 EST
On 11/5/2026 2:50 AM, Rob Clark wrote:
> Need to set b25 in TPL1_DBG_ECO_CNTL1 on all gen8.
>
> Reported-by: Danylo Piliaiev <dpiliaiev@xxxxxxxxxx>
> Signed-off-by: Rob Clark <robin.clark@xxxxxxxxxxxxxxxx>
> ---
> drivers/gpu/drm/msm/adreno/a8xx_catalog.c | 12 ++++++------
> 1 file changed, 6 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/gpu/drm/msm/adreno/a8xx_catalog.c b/drivers/gpu/drm/msm/adreno/a8xx_catalog.c
> index a7d9ccf26493..510c2f6017db 100644
> --- a/drivers/gpu/drm/msm/adreno/a8xx_catalog.c
> +++ b/drivers/gpu/drm/msm/adreno/a8xx_catalog.c
> @@ -61,7 +61,7 @@ static const struct adreno_reglist_pipe a830_nonctxt_regs[] = {
> { REG_A6XX_TPL1_DBG_ECO_CNTL, 0x10000000, BIT(PIPE_NONE) },
> /* Enable cubemap small miplevel optimization settings */
> /* BIT(26): Disable final clamp for bicubic filtering */
> - { REG_A6XX_TPL1_DBG_ECO_CNTL1, 0x04000724, BIT(PIPE_NONE) },
> + { REG_A6XX_TPL1_DBG_ECO_CNTL1, 0x06000724, BIT(PIPE_NONE) },
> /* Disable tag bank id hashing */
> { REG_A6XX_UCHE_MODE_CNTL, 0x00080000, BIT(PIPE_NONE) },
> { REG_A8XX_UCHE_CCHE_MODE_CNTL, 0x00001000, BIT(PIPE_NONE) },
> @@ -297,7 +297,7 @@ static const struct adreno_reglist_pipe x285_nonctxt_regs[] = {
> { REG_A7XX_SP_READ_SEL, 0x0001ff00, BIT(PIPE_NONE) },
> { REG_A6XX_TPL1_DBG_ECO_CNTL, 0x10000000, BIT(PIPE_NONE) },
> /* BIT(26): Disable final clamp for bicubic filtering */
> - { REG_A6XX_TPL1_DBG_ECO_CNTL1, 0x04000720, BIT(PIPE_NONE) },
> + { REG_A6XX_TPL1_DBG_ECO_CNTL1, 0x06000720, BIT(PIPE_NONE) },
> { REG_A6XX_UCHE_MODE_CNTL, 0x80080000, BIT(PIPE_NONE) },
> { REG_A8XX_UCHE_CCHE_MODE_CNTL, 0x00001000, BIT(PIPE_NONE) },
> { REG_A8XX_UCHE_CCHE_CACHE_WAYS, 0x00000800, BIT(PIPE_NONE) },
> @@ -397,7 +397,7 @@ static const struct adreno_reglist_pipe a810_nonctxt_regs[] = {
> { REG_A6XX_SP_PERFCTR_SHADER_MASK, 0x0000003f, BIT(PIPE_NONE) },
> { REG_A7XX_SP_HLSQ_TIMEOUT_THRESHOLD_DP, 0x00000080, BIT(PIPE_NONE) },
> { REG_A6XX_TPL1_DBG_ECO_CNTL, 0x10100000, BIT(PIPE_NONE) },
> - { REG_A6XX_TPL1_DBG_ECO_CNTL1, 0x04000724, BIT(PIPE_NONE) },
> + { REG_A6XX_TPL1_DBG_ECO_CNTL1, 0x06000724, BIT(PIPE_NONE) },
> { REG_A6XX_UCHE_MODE_CNTL, 0x00020000, BIT(PIPE_NONE) },
> { REG_A8XX_UCHE_CCHE_MODE_CNTL, 0x00001000, BIT(PIPE_NONE) },
> { REG_A8XX_UCHE_CCHE_CACHE_WAYS, 0x00000800, BIT(PIPE_NONE) },
> @@ -630,7 +630,7 @@ static const struct adreno_reglist_pipe a840_nonctxt_regs[] = {
> { REG_A7XX_SP_READ_SEL, 0x0001ff00, BIT(PIPE_NONE) },
> { REG_A6XX_TPL1_DBG_ECO_CNTL, 0x10100000, BIT(PIPE_NONE) },
> /* BIT(26): Disable final clamp for bicubic filtering */
> - { REG_A6XX_TPL1_DBG_ECO_CNTL1, 0x04000720, BIT(PIPE_NONE) },
> + { REG_A6XX_TPL1_DBG_ECO_CNTL1, 0x06000720, BIT(PIPE_NONE) },
> { REG_A6XX_UCHE_MODE_CNTL, 0x80080000, BIT(PIPE_NONE) },
> { REG_A8XX_UCHE_CCHE_MODE_CNTL, 0x00001000, BIT(PIPE_NONE) },
> { REG_A8XX_UCHE_CCHE_CACHE_WAYS, 0x00000800, BIT(PIPE_NONE) },
> @@ -972,7 +972,7 @@ static const struct adreno_reglist_pipe a845_nonctxt_regs[] = {
> { REG_A7XX_SP_READ_SEL, 0x0001ff00, BIT(PIPE_NONE) },
> { REG_A8XX_SP_L0_PERF_TUNE, 0x00000024, BIT(PIPE_NONE) },
> { REG_A6XX_TPL1_DBG_ECO_CNTL, 0x10100000, BIT(PIPE_NONE) },
> - { REG_A6XX_TPL1_DBG_ECO_CNTL1, 0x00000720, BIT(PIPE_NONE) },
> + { REG_A6XX_TPL1_DBG_ECO_CNTL1, 0x02000720, BIT(PIPE_NONE) },
> { REG_A6XX_UCHE_MODE_CNTL, 0x80080000, BIT(PIPE_NONE) },
> { REG_A8XX_UCHE_CCHE_MODE_CNTL, 0x00001000, BIT(PIPE_NONE) },
> { REG_A8XX_UCHE_DBG_ECO_CNTL_0, BIT(31), BIT(PIPE_NONE) },
> @@ -1030,7 +1030,7 @@ static const struct adreno_reglist_pipe a850_nonctxt_regs[] = {
> { REG_A7XX_SP_READ_SEL, 0x0001ff00, BIT(PIPE_NONE) },
> { REG_A8XX_SP_L0_PERF_TUNE, 0x00000024, BIT(PIPE_NONE) },
> { REG_A6XX_TPL1_DBG_ECO_CNTL, 0x10100000, BIT(PIPE_NONE) },
> - { REG_A6XX_TPL1_DBG_ECO_CNTL1, 0x00000720, BIT(PIPE_NONE) },
> + { REG_A6XX_TPL1_DBG_ECO_CNTL1, 0x02000720, BIT(PIPE_NONE) },
> { REG_A6XX_UCHE_MODE_CNTL, 0x80080000, BIT(PIPE_NONE) },
> { REG_A8XX_UCHE_CCHE_MODE_CNTL, 0x00001000, BIT(PIPE_NONE) },
> { REG_A8XX_UCHE_DBG_ECO_CNTL_0, BIT(31), BIT(PIPE_NONE) },
Reviewed-by: Akhil P Oommen <akhilpo@xxxxxxxxxxxxxxxx>
-Akhil