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From:   Konrad Dybcio <konrad.dybcio@linaro.org>
Date:   Sat, 01 Apr 2023 13:54:47 +0200
Subject: [PATCH v6 10/15] drm/msm/a6xx: Add A610 support
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Message-Id: <20230223-topic-gmuwrapper-v6-10-2034115bb60c@linaro.org>
References: <20230223-topic-gmuwrapper-v6-0-2034115bb60c@linaro.org>
In-Reply-To: <20230223-topic-gmuwrapper-v6-0-2034115bb60c@linaro.org>
To:     Rob Clark <robdclark@gmail.com>,
        Abhinav Kumar <quic_abhinavk@quicinc.com>,
        Dmitry Baryshkov <dmitry.baryshkov@linaro.org>,
        Sean Paul <sean@poorly.run>, David Airlie <airlied@gmail.com>,
        Daniel Vetter <daniel@ffwll.ch>,
        Rob Herring <robh+dt@kernel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
        Bjorn Andersson <andersson@kernel.org>,
        Konrad Dybcio <konrad.dybcio@somainline.org>,
        Akhil P Oommen <quic_akhilpo@quicinc.com>
Cc:     linux-arm-msm@vger.kernel.org, dri-devel@lists.freedesktop.org,
        freedreno@lists.freedesktop.org, devicetree@vger.kernel.org,
        linux-kernel@vger.kernel.org, Rob Clark <robdclark@chromium.org>,
        Marijn Suijten <marijn.suijten@somainline.org>,
        Konrad Dybcio <konrad.dybcio@linaro.org>
Precedence: bulk

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@linaro.org>
Signed-off-by: Konrad Dybcio <konrad.dybcio@linaro.org>
---
 drivers/gpu/drm/msm/adreno/a6xx_gpu.c      | 97 +++++++++++++++++++++++++++---
 drivers/gpu/drm/msm/adreno/adreno_device.c | 12 ++++
 drivers/gpu/drm/msm/adreno/adreno_gpu.h    |  8 ++-
 3 files changed, 107 insertions(+), 10 deletions(-)

diff --git a/drivers/gpu/drm/msm/adreno/a6xx_gpu.c b/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
index 2d68b7488b1b..b2c604a66007 100644
--- a/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
+++ b/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
@@ -254,6 +254,56 @@ 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},
@@ -604,6 +654,8 @@ 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;
 
@@ -812,6 +864,13 @@ 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;
@@ -1079,13 +1138,13 @@ 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);
@@ -1113,18 +1172,26 @@ 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
@@ -1135,6 +1202,8 @@ 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);
 
@@ -1150,8 +1219,10 @@ 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);
 
@@ -1373,6 +1444,14 @@ static void a6xx_recover(struct msm_gpu *gpu)
 
 	/* Software-reset the GPU */
 	if (adreno_has_gmu_wrapper(adreno_gpu)) {
+		/* 11nm chips (i.e. A610-hosting ones) have HW issues with the reset line */
+		if (!adreno_is_a610(adreno_gpu)) {
+			gpu_write(gpu, REG_A6XX_RBBM_SW_RESET_CMD, 1);
+			gpu_read(gpu, REG_A6XX_RBBM_SW_RESET_CMD);
+			udelay(100);
+			gpu_write(gpu, REG_A6XX_RBBM_SW_RESET_CMD, 0);
+		}
+
 		if (adreno_is_a619_holi(adreno_gpu)) {
 			gpu_write(gpu, 0x18, GPR0_GBIF_HALT_REQUEST);
 			spin_until((gpu_read(gpu, REG_A6XX_RBBM_VBIF_GX_RESET_STATUS) &
diff --git a/drivers/gpu/drm/msm/adreno/adreno_device.c b/drivers/gpu/drm/msm/adreno/adreno_device.c
index 4705ce3eb95e..bc536d658aa6 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,
+		.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;

-- 
2.40.0