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From:   Konrad Dybcio <konrad.dybcio@linaro.org>
Date:   Sat, 01 Apr 2023 13:54:46 +0200
Subject: [PATCH v6 09/15] drm/msm/a6xx: Add support for A619_holi
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Message-Id: <20230223-topic-gmuwrapper-v6-9-2034115bb60c@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

A619_holi is a GMU-less variant of the already-supported A619 GPU.
It's present on at least SM4350 (holi) and SM6375 (blair). No mesa
changes are required. Add the required kernel-side support for it.

Signed-off-by: Konrad Dybcio <konrad.dybcio@linaro.org>
---
 drivers/gpu/drm/msm/adreno/a6xx_gpu.c   | 47 ++++++++++++++++++++++++++-------
 drivers/gpu/drm/msm/adreno/adreno_gpu.h |  5 ++++
 2 files changed, 43 insertions(+), 9 deletions(-)

diff --git a/drivers/gpu/drm/msm/adreno/a6xx_gpu.c b/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
index 17e314a745c3..2d68b7488b1b 100644
--- a/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
+++ b/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
@@ -614,14 +614,16 @@ static void a6xx_set_hwcg(struct msm_gpu *gpu, bool state)
 		return;
 
 	/* Disable SP clock before programming HWCG registers */
-	if (!adreno_has_gmu_wrapper(adreno_gpu))
+	if (!adreno_has_gmu_wrapper(adreno_gpu) ||
+	     adreno_is_a619_holi(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 */
-	if (!adreno_has_gmu_wrapper(adreno_gpu))
+	if (!adreno_has_gmu_wrapper(adreno_gpu) ||
+	     adreno_is_a619_holi(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);
@@ -814,6 +816,9 @@ static void a6xx_set_ubwc_config(struct msm_gpu *gpu)
 	if (adreno_is_a618(adreno_gpu))
 		return;
 
+	if (adreno_is_a619_holi(adreno_gpu))
+		hbb_lo = 0;
+
 	if (adreno_is_a640_family(adreno_gpu))
 		amsbc = 1;
 
@@ -1031,7 +1036,12 @@ static int hw_init(struct msm_gpu *gpu)
 	}
 
 	/* Clear GBIF halt in case GX domain was not collapsed */
-	if (a6xx_has_gbif(adreno_gpu)) {
+	if (adreno_is_a619_holi(adreno_gpu)) {
+		gpu_write(gpu, REG_A6XX_GBIF_HALT, 0);
+		gpu_write(gpu, 0x18, 0);
+		/* Let's make extra sure that the GPU can access the memory.. */
+		mb();
+	} else if (a6xx_has_gbif(adreno_gpu)) {
 		gpu_write(gpu, REG_A6XX_GBIF_HALT, 0);
 		gpu_write(gpu, REG_A6XX_RBBM_GBIF_HALT, 0);
 		/* Let's make extra sure that the GPU can access the memory.. */
@@ -1040,6 +1050,9 @@ static int hw_init(struct msm_gpu *gpu)
 
 	gpu_write(gpu, REG_A6XX_RBBM_SECVID_TSB_CNTL, 0);
 
+	if (adreno_is_a619_holi(adreno_gpu))
+		a6xx_sptprac_enable(gmu);
+
 	/*
 	 * Disable the trusted memory range - we don't actually supported secure
 	 * memory rendering at this point in time and we don't want to block off
@@ -1295,7 +1308,8 @@ static void a6xx_dump(struct msm_gpu *gpu)
 #define GBIF_CLIENT_HALT_MASK	BIT(0)
 #define GBIF_ARB_HALT_MASK	BIT(1)
 #define VBIF_RESET_ACK_TIMEOUT	100
-#define VBIF_RESET_ACK_MASK	0x00f0
+#define VBIF_RESET_ACK_MASK	0xF0
+#define GPR0_GBIF_HALT_REQUEST	0x1E0
 
 static void a6xx_recover(struct msm_gpu *gpu)
 {
@@ -1359,10 +1373,16 @@ static void a6xx_recover(struct msm_gpu *gpu)
 
 	/* Software-reset the GPU */
 	if (adreno_has_gmu_wrapper(adreno_gpu)) {
-		/* Halt the GX side of GBIF */
-		gpu_write(gpu, REG_A6XX_RBBM_GBIF_HALT, GBIF_GX_HALT_MASK);
-		spin_until(gpu_read(gpu, REG_A6XX_RBBM_GBIF_HALT_ACK) &
-			   GBIF_GX_HALT_MASK);
+		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) &
+				   (VBIF_RESET_ACK_MASK)) == VBIF_RESET_ACK_MASK);
+		} else {
+			/* Halt the GX side of GBIF */
+			gpu_write(gpu, REG_A6XX_RBBM_GBIF_HALT, GBIF_GX_HALT_MASK);
+			spin_until(gpu_read(gpu, REG_A6XX_RBBM_GBIF_HALT_ACK) &
+				   GBIF_GX_HALT_MASK);
+		}
 
 		/* Halt new client requests on GBIF */
 		gpu_write(gpu, REG_A6XX_GBIF_HALT, GBIF_CLIENT_HALT_MASK);
@@ -1377,7 +1397,10 @@ static void a6xx_recover(struct msm_gpu *gpu)
 		/* Clear the halts */
 		gpu_write(gpu, REG_A6XX_GBIF_HALT, 0);
 
-		gpu_write(gpu, REG_A6XX_RBBM_GBIF_HALT, 0);
+		if (adreno_is_a619_holi(adreno_gpu))
+			gpu_write(gpu, 0x18, 0);
+		else
+			gpu_write(gpu, REG_A6XX_RBBM_GBIF_HALT, 0);
 
 		/* This *really* needs to go through before we do anything else! */
 		mb();
@@ -1733,6 +1756,9 @@ static int a6xx_pm_resume(struct msm_gpu *gpu)
 	if (ret)
 		goto err_mem_clk;
 
+	if (adreno_is_a619_holi(adreno_gpu))
+		a6xx_sptprac_enable(gmu);
+
 	/* If anything goes south, tear the GPU down piece by piece.. */
 	if (ret) {
 err_mem_clk:
@@ -1798,6 +1824,9 @@ static int a6xx_pm_suspend(struct msm_gpu *gpu)
 
 	mutex_lock(&a6xx_gpu->gmu.lock);
 
+	if (adreno_is_a619_holi(adreno_gpu))
+		a6xx_sptprac_disable(gmu);
+
 	clk_disable_unprepare(gpu->ebi1_clk);
 
 	clk_bulk_disable_unprepare(gpu->nr_clocks, gpu->grp_clks);
diff --git a/drivers/gpu/drm/msm/adreno/adreno_gpu.h b/drivers/gpu/drm/msm/adreno/adreno_gpu.h
index ee5352bc5329..432fee5c1516 100644
--- a/drivers/gpu/drm/msm/adreno/adreno_gpu.h
+++ b/drivers/gpu/drm/msm/adreno/adreno_gpu.h
@@ -252,6 +252,11 @@ static inline int adreno_is_a619(struct adreno_gpu *gpu)
 	return gpu->revn == 619;
 }
 
+static inline int adreno_is_a619_holi(struct adreno_gpu *gpu)
+{
+	return adreno_is_a619(gpu) && adreno_has_gmu_wrapper(gpu);
+}
+
 static inline int adreno_is_a630(struct adreno_gpu *gpu)
 {
 	return gpu->revn == 630;

-- 
2.40.0