Re: [PATCH v8 13/18] drm/msm/a6xx: Add A610 support

From: Akhil P Oommen
Date: Wed Jun 14 2023 - 15:42:38 EST

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On Mon, May 29, 2023 at 03:52:32PM +0200, Konrad Dybcio wrote:
>
> A610 is one of (if not the) lowest-tier SKUs in the A6XX family. It
> features no GMU, as it's implemented solely on SoCs with SMD_RPM.
> What's more interesting is that it does not feature a VDDGX line
> either, being powered solely by VDDCX and has an unfortunate hardware
> quirk that makes its reset line broken - after a couple of assert/
> deassert cycles, it will hang for good and will not wake up again.
>
> This GPU requires mesa changes for proper rendering, and lots of them
> at that. The command streams are quite far away from any other A6XX
> GPU and hence it needs special care. This patch was validated both
> by running an (incomplete) downstream mesa with some hacks (frames
> rendered correctly, though some instructions made the GPU hangcheck
> which is expected - garbage in, garbage out) and by replaying RD
> traces captured with the downstream KGSL driver - no crashes there,
> ever.
>
> Add support for this GPU on the kernel side, which comes down to
> pretty simply adding A612 HWCG tables, altering a few values and
> adding a special case for handling the reset line.
>
> Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx>
> Signed-off-by: Konrad Dybcio <konrad.dybcio@xxxxxxxxxx>
> ---
> drivers/gpu/drm/msm/adreno/a6xx_gpu.c | 101 +++++++++++++++++++++++++----
> drivers/gpu/drm/msm/adreno/adreno_device.c | 12 ++++
> drivers/gpu/drm/msm/adreno/adreno_gpu.h | 8 ++-
> 3 files changed, 108 insertions(+), 13 deletions(-)
>
> diff --git a/drivers/gpu/drm/msm/adreno/a6xx_gpu.c b/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
> index bb04f65e6f68..c0d5973320d9 100644
> --- a/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
> +++ b/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
> @@ -252,6 +252,56 @@ static void a6xx_submit(struct msm_gpu *gpu, struct msm_gem_submit *submit)
> a6xx_flush(gpu, ring);
> }
>
> +const struct adreno_reglist a612_hwcg[] = {
> + {REG_A6XX_RBBM_CLOCK_CNTL_SP0, 0x22222222},
> + {REG_A6XX_RBBM_CLOCK_CNTL2_SP0, 0x02222220},
> + {REG_A6XX_RBBM_CLOCK_DELAY_SP0, 0x00000081},
> + {REG_A6XX_RBBM_CLOCK_HYST_SP0, 0x0000f3cf},
> + {REG_A6XX_RBBM_CLOCK_CNTL_TP0, 0x22222222},
> + {REG_A6XX_RBBM_CLOCK_CNTL2_TP0, 0x22222222},
> + {REG_A6XX_RBBM_CLOCK_CNTL3_TP0, 0x22222222},
> + {REG_A6XX_RBBM_CLOCK_CNTL4_TP0, 0x00022222},
> + {REG_A6XX_RBBM_CLOCK_DELAY_TP0, 0x11111111},
> + {REG_A6XX_RBBM_CLOCK_DELAY2_TP0, 0x11111111},
> + {REG_A6XX_RBBM_CLOCK_DELAY3_TP0, 0x11111111},
> + {REG_A6XX_RBBM_CLOCK_DELAY4_TP0, 0x00011111},
> + {REG_A6XX_RBBM_CLOCK_HYST_TP0, 0x77777777},
> + {REG_A6XX_RBBM_CLOCK_HYST2_TP0, 0x77777777},
> + {REG_A6XX_RBBM_CLOCK_HYST3_TP0, 0x77777777},
> + {REG_A6XX_RBBM_CLOCK_HYST4_TP0, 0x00077777},
> + {REG_A6XX_RBBM_CLOCK_CNTL_RB0, 0x22222222},
> + {REG_A6XX_RBBM_CLOCK_CNTL2_RB0, 0x01202222},
> + {REG_A6XX_RBBM_CLOCK_CNTL_CCU0, 0x00002220},
> + {REG_A6XX_RBBM_CLOCK_HYST_RB_CCU0, 0x00040f00},
> + {REG_A6XX_RBBM_CLOCK_CNTL_RAC, 0x05522022},
> + {REG_A6XX_RBBM_CLOCK_CNTL2_RAC, 0x00005555},
> + {REG_A6XX_RBBM_CLOCK_DELAY_RAC, 0x00000011},
> + {REG_A6XX_RBBM_CLOCK_HYST_RAC, 0x00445044},
> + {REG_A6XX_RBBM_CLOCK_CNTL_TSE_RAS_RBBM, 0x04222222},
> + {REG_A6XX_RBBM_CLOCK_MODE_VFD, 0x00002222},
> + {REG_A6XX_RBBM_CLOCK_MODE_GPC, 0x02222222},
> + {REG_A6XX_RBBM_CLOCK_DELAY_HLSQ_2, 0x00000002},
> + {REG_A6XX_RBBM_CLOCK_MODE_HLSQ, 0x00002222},
> + {REG_A6XX_RBBM_CLOCK_DELAY_TSE_RAS_RBBM, 0x00004000},
> + {REG_A6XX_RBBM_CLOCK_DELAY_VFD, 0x00002222},
> + {REG_A6XX_RBBM_CLOCK_DELAY_GPC, 0x00000200},
> + {REG_A6XX_RBBM_CLOCK_DELAY_HLSQ, 0x00000000},
> + {REG_A6XX_RBBM_CLOCK_HYST_TSE_RAS_RBBM, 0x00000000},
> + {REG_A6XX_RBBM_CLOCK_HYST_VFD, 0x00000000},
> + {REG_A6XX_RBBM_CLOCK_HYST_GPC, 0x04104004},
> + {REG_A6XX_RBBM_CLOCK_HYST_HLSQ, 0x00000000},
> + {REG_A6XX_RBBM_CLOCK_CNTL_UCHE, 0x22222222},
> + {REG_A6XX_RBBM_CLOCK_HYST_UCHE, 0x00000004},
> + {REG_A6XX_RBBM_CLOCK_DELAY_UCHE, 0x00000002},
> + {REG_A6XX_RBBM_ISDB_CNT, 0x00000182},
> + {REG_A6XX_RBBM_RAC_THRESHOLD_CNT, 0x00000000},
> + {REG_A6XX_RBBM_SP_HYST_CNT, 0x00000000},
> + {REG_A6XX_RBBM_CLOCK_CNTL_GMU_GX, 0x00000222},
> + {REG_A6XX_RBBM_CLOCK_DELAY_GMU_GX, 0x00000111},
> + {REG_A6XX_RBBM_CLOCK_HYST_GMU_GX, 0x00000555},
> + {},
> +};
> +
> /* For a615 family (a615, a616, a618 and a619) */
> const struct adreno_reglist a615_hwcg[] = {
> {REG_A6XX_RBBM_CLOCK_CNTL_SP0, 0x02222222},
> @@ -602,6 +652,8 @@ static void a6xx_set_hwcg(struct msm_gpu *gpu, bool state)
>
> if (adreno_is_a630(adreno_gpu))
> clock_cntl_on = 0x8aa8aa02;
> + else if (adreno_is_a610(adreno_gpu))
> + clock_cntl_on = 0xaaa8aa82;
> else
> clock_cntl_on = 0x8aa8aa82;
>
> @@ -612,13 +664,15 @@ static void a6xx_set_hwcg(struct msm_gpu *gpu, bool state)
> return;
>
> /* Disable SP clock before programming HWCG registers */
> - gmu_rmw(gmu, REG_A6XX_GPU_GMU_GX_SPTPRAC_CLOCK_CONTROL, 1, 0);
> + if (!adreno_is_a610(adreno_gpu))
> + gmu_rmw(gmu, REG_A6XX_GPU_GMU_GX_SPTPRAC_CLOCK_CONTROL, 1, 0);
>
> for (i = 0; (reg = &adreno_gpu->info->hwcg[i], reg->offset); i++)
> gpu_write(gpu, reg->offset, state ? reg->value : 0);
>
> /* Enable SP clock */
> - gmu_rmw(gmu, REG_A6XX_GPU_GMU_GX_SPTPRAC_CLOCK_CONTROL, 0, 1);
> + if (!adreno_is_a610(adreno_gpu))
> + gmu_rmw(gmu, REG_A6XX_GPU_GMU_GX_SPTPRAC_CLOCK_CONTROL, 0, 1);
>
> gpu_write(gpu, REG_A6XX_RBBM_CLOCK_CNTL, state ? clock_cntl_on : 0);
> }
> @@ -806,6 +860,13 @@ static void a6xx_set_ubwc_config(struct msm_gpu *gpu)
> /* Unknown, introduced with A640/680 */
> u32 amsbc = 0;
>
> + if (adreno_is_a610(adreno_gpu)) {
> + /* HBB = 14 */
> + hbb_lo = 1;
> + min_acc_len = 1;
> + ubwc_mode = 1;
> + }
> +
> /* a618 is using the hw default values */
> if (adreno_is_a618(adreno_gpu))
> return;
> @@ -1073,13 +1134,13 @@ static int hw_init(struct msm_gpu *gpu)
> a6xx_set_hwcg(gpu, true);
>
> /* VBIF/GBIF start*/
> - if (adreno_is_a640_family(adreno_gpu) ||
> + if (adreno_is_a610(adreno_gpu) ||
> + adreno_is_a640_family(adreno_gpu) ||
> adreno_is_a650_family(adreno_gpu)) {
> gpu_write(gpu, REG_A6XX_GBIF_QSB_SIDE0, 0x00071620);
> gpu_write(gpu, REG_A6XX_GBIF_QSB_SIDE1, 0x00071620);
> gpu_write(gpu, REG_A6XX_GBIF_QSB_SIDE2, 0x00071620);
> gpu_write(gpu, REG_A6XX_GBIF_QSB_SIDE3, 0x00071620);
> - gpu_write(gpu, REG_A6XX_GBIF_QSB_SIDE3, 0x00071620);
> gpu_write(gpu, REG_A6XX_RBBM_GBIF_CLIENT_QOS_CNTL, 0x3);
> } else {
> gpu_write(gpu, REG_A6XX_RBBM_VBIF_CLIENT_QOS_CNTL, 0x3);
> @@ -1107,18 +1168,26 @@ static int hw_init(struct msm_gpu *gpu)
> gpu_write(gpu, REG_A6XX_UCHE_FILTER_CNTL, 0x804);
> gpu_write(gpu, REG_A6XX_UCHE_CACHE_WAYS, 0x4);
>
> - if (adreno_is_a640_family(adreno_gpu) ||
> - adreno_is_a650_family(adreno_gpu))
> + if (adreno_is_a640_family(adreno_gpu) || adreno_is_a650_family(adreno_gpu)) {
> gpu_write(gpu, REG_A6XX_CP_ROQ_THRESHOLDS_2, 0x02000140);
> - else
> + gpu_write(gpu, REG_A6XX_CP_ROQ_THRESHOLDS_1, 0x8040362c);
> + } else if (adreno_is_a610(adreno_gpu)) {
> + gpu_write(gpu, REG_A6XX_CP_ROQ_THRESHOLDS_2, 0x00800060);
> + gpu_write(gpu, REG_A6XX_CP_ROQ_THRESHOLDS_1, 0x40201b16);
> + } else {
> gpu_write(gpu, REG_A6XX_CP_ROQ_THRESHOLDS_2, 0x010000c0);
> - gpu_write(gpu, REG_A6XX_CP_ROQ_THRESHOLDS_1, 0x8040362c);
> + gpu_write(gpu, REG_A6XX_CP_ROQ_THRESHOLDS_1, 0x8040362c);
> + }
>
> if (adreno_is_a660_family(adreno_gpu))
> gpu_write(gpu, REG_A6XX_CP_LPAC_PROG_FIFO_SIZE, 0x00000020);
>
> /* Setting the mem pool size */
> - gpu_write(gpu, REG_A6XX_CP_MEM_POOL_SIZE, 128);
> + if (adreno_is_a610(adreno_gpu)) {
> + gpu_write(gpu, REG_A6XX_CP_MEM_POOL_SIZE, 48);
> + gpu_write(gpu, REG_A6XX_CP_MEM_POOL_DBG_ADDR, 47);
> + } else
> + gpu_write(gpu, REG_A6XX_CP_MEM_POOL_SIZE, 128);
>
> /* Setting the primFifo thresholds default values,
> * and vccCacheSkipDis=1 bit (0x200) for A640 and newer
> @@ -1129,6 +1198,8 @@ static int hw_init(struct msm_gpu *gpu)
> gpu_write(gpu, REG_A6XX_PC_DBG_ECO_CNTL, 0x00200200);
> else if (adreno_is_a650(adreno_gpu) || adreno_is_a660(adreno_gpu))
> gpu_write(gpu, REG_A6XX_PC_DBG_ECO_CNTL, 0x00300200);
> + else if (adreno_is_a610(adreno_gpu))
> + gpu_write(gpu, REG_A6XX_PC_DBG_ECO_CNTL, 0x00080000);
> else
> gpu_write(gpu, REG_A6XX_PC_DBG_ECO_CNTL, 0x00180000);
>
> @@ -1144,8 +1215,10 @@ static int hw_init(struct msm_gpu *gpu)
> a6xx_set_ubwc_config(gpu);
>
> /* Enable fault detection */
> - gpu_write(gpu, REG_A6XX_RBBM_INTERFACE_HANG_INT_CNTL,
> - (1 << 30) | 0x1fffff);
> + if (adreno_is_a610(adreno_gpu))
> + gpu_write(gpu, REG_A6XX_RBBM_INTERFACE_HANG_INT_CNTL, (1 << 30) | 0x3ffff);
> + else
> + gpu_write(gpu, REG_A6XX_RBBM_INTERFACE_HANG_INT_CNTL, (1 << 30) | 0x1fffff);
>
> gpu_write(gpu, REG_A6XX_UCHE_CLIENT_PF, 1);
>
> @@ -1675,7 +1748,7 @@ void a6xx_bus_clear_pending_transactions(struct adreno_gpu *adreno_gpu, bool gx_
> struct msm_gpu *gpu = &adreno_gpu->base;
>
> if (adreno_is_a619_holi(adreno_gpu)) {
> - gpu_write(gpu, 0x18, GPR0_GBIF_HALT_REQUEST);
> + gpu_write(gpu, REG_A6XX_RBBM_GPR0_CNTL, GPR0_GBIF_HALT_REQUEST);

This looks like an unrelated change.

> spin_until((gpu_read(gpu, REG_A6XX_RBBM_VBIF_GX_RESET_STATUS) &
> (VBIF_RESET_ACK_MASK)) == VBIF_RESET_ACK_MASK);
> } else if (!a6xx_has_gbif(adreno_gpu)) {
> @@ -1709,6 +1782,10 @@ void a6xx_bus_clear_pending_transactions(struct adreno_gpu *adreno_gpu, bool gx_
>
> void a6xx_gpu_sw_reset(struct msm_gpu *gpu, bool assert)
> {
> + /* 11nm chips (e.g. ones with A610) have hw issues with the reset line! */
> + if (adreno_is_a610(to_adreno_gpu(gpu)))
> + return;
> +
> gpu_write(gpu, REG_A6XX_RBBM_SW_RESET_CMD, assert);
> /* Add a barrier to avoid bad surprises */
> mb();
> diff --git a/drivers/gpu/drm/msm/adreno/adreno_device.c b/drivers/gpu/drm/msm/adreno/adreno_device.c
> index b133755a56c4..2c2cdbdada4d 100644
> --- a/drivers/gpu/drm/msm/adreno/adreno_device.c
> +++ b/drivers/gpu/drm/msm/adreno/adreno_device.c
> @@ -253,6 +253,18 @@ static const struct adreno_info gpulist[] = {
> .quirks = ADRENO_QUIRK_LMLOADKILL_DISABLE,
> .init = a5xx_gpu_init,
> .zapfw = "a540_zap.mdt",
> + }, {
> + .rev = ADRENO_REV(6, 1, 0, ANY_ID),
> + .revn = 610,
> + .name = "A610",
> + .fw = {
> + [ADRENO_FW_SQE] = "a630_sqe.fw",
> + },
> + .gmem = (SZ_128K + SZ_4K),
> + .inactive_period = 500,

You really want such a long inactive period?

> + .init = a6xx_gpu_init,
> + .zapfw = "a610_zap.mdt",
> + .hwcg = a612_hwcg,
> }, {
> .rev = ADRENO_REV(6, 1, 8, ANY_ID),
> .revn = 618,
> diff --git a/drivers/gpu/drm/msm/adreno/adreno_gpu.h b/drivers/gpu/drm/msm/adreno/adreno_gpu.h
> index 432fee5c1516..7a5d595d4b99 100644
> --- a/drivers/gpu/drm/msm/adreno/adreno_gpu.h
> +++ b/drivers/gpu/drm/msm/adreno/adreno_gpu.h
> @@ -55,7 +55,8 @@ struct adreno_reglist {
> u32 value;
> };
>
> -extern const struct adreno_reglist a615_hwcg[], a630_hwcg[], a640_hwcg[], a650_hwcg[], a660_hwcg[];
> +extern const struct adreno_reglist a612_hwcg[], a615_hwcg[], a630_hwcg[], a640_hwcg[], a650_hwcg[];
> +extern const struct adreno_reglist a660_hwcg[];
>
> struct adreno_info {
> struct adreno_rev rev;
> @@ -242,6 +243,11 @@ static inline int adreno_is_a540(struct adreno_gpu *gpu)
> return gpu->revn == 540;
> }
>
> +static inline int adreno_is_a610(struct adreno_gpu *gpu)
> +{
> + return gpu->revn == 610;
> +}
> +
> static inline int adreno_is_a618(struct adreno_gpu *gpu)
> {
> return gpu->revn == 618;
>
> --
> 2.40.1
>

Minor nits, but looks good to me.

-Akhil.

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