linux-kernel - [PATCH v2 1/6] drm/msm/a6xx: Split out gpucc register block

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Message-ID: <20250228-a623-gpu-support-v2-1-aea654ecc1d3@quicinc.com>
Date: Fri, 28 Feb 2025 01:37:49 +0530
From: Akhil P Oommen <quic_akhilpo@...cinc.com>
To: Rob Clark <robdclark@...il.com>, Sean Paul <sean@...rly.run>,
        "Konrad
 Dybcio" <konradybcio@...nel.org>,
        Abhinav Kumar <quic_abhinavk@...cinc.com>,
        Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
        Marijn Suijten
	<marijn.suijten@...ainline.org>,
        David Airlie <airlied@...il.com>, "Simona
 Vetter" <simona@...ll.ch>,
        Maarten Lankhorst
	<maarten.lankhorst@...ux.intel.com>,
        Maxime Ripard <mripard@...nel.org>,
        Thomas Zimmermann <tzimmermann@...e.de>, Rob Herring <robh@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>
CC: <linux-arm-msm@...r.kernel.org>, <dri-devel@...ts.freedesktop.org>,
        <freedreno@...ts.freedesktop.org>, <linux-kernel@...r.kernel.org>,
        <devicetree@...r.kernel.org>, Jie Zhang <quic_jiezh@...cinc.com>,
        "Akhil P
 Oommen" <quic_akhilpo@...cinc.com>
Subject: [PATCH v2 1/6] drm/msm/a6xx: Split out gpucc register block

From: Jie Zhang <quic_jiezh@...cinc.com>

Some GPUs have different memory map for GPUCC block. So split out the
gpucc range from a6xx_gmu_cx_registers to a separate block to
accommodate those GPUs.

Signed-off-by: Jie Zhang <quic_jiezh@...cinc.com>
Signed-off-by: Akhil P Oommen <quic_akhilpo@...cinc.com>
---
 drivers/gpu/drm/msm/adreno/a6xx_gpu_state.c | 8 +++++---
 drivers/gpu/drm/msm/adreno/a6xx_gpu_state.h | 5 +++++
 2 files changed, 10 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/msm/adreno/a6xx_gpu_state.c b/drivers/gpu/drm/msm/adreno/a6xx_gpu_state.c
index 0fcae53c0b140b42d9af313695ad6121c9fc5618..81763876e4029713994b47729a2cec7e1dd3fbb9 100644
--- a/drivers/gpu/drm/msm/adreno/a6xx_gpu_state.c
+++ b/drivers/gpu/drm/msm/adreno/a6xx_gpu_state.c
@@ -1214,18 +1214,20 @@ static void a6xx_get_gmu_registers(struct msm_gpu *gpu,
 	struct a6xx_gpu *a6xx_gpu = to_a6xx_gpu(adreno_gpu);
 
 	a6xx_state->gmu_registers = state_kcalloc(a6xx_state,
-		3, sizeof(*a6xx_state->gmu_registers));
+		4, sizeof(*a6xx_state->gmu_registers));
 
 	if (!a6xx_state->gmu_registers)
 		return;
 
-	a6xx_state->nr_gmu_registers = 3;
+	a6xx_state->nr_gmu_registers = 4;
 
 	/* Get the CX GMU registers from AHB */
 	_a6xx_get_gmu_registers(gpu, a6xx_state, &a6xx_gmu_reglist[0],
 		&a6xx_state->gmu_registers[0], false);
 	_a6xx_get_gmu_registers(gpu, a6xx_state, &a6xx_gmu_reglist[1],
 		&a6xx_state->gmu_registers[1], true);
+	_a6xx_get_gmu_registers(gpu, a6xx_state, &a6xx_gpucc_reg,
+		&a6xx_state->gmu_registers[2], false);
 
 	if (!a6xx_gmu_gx_is_on(&a6xx_gpu->gmu))
 		return;
@@ -1234,7 +1236,7 @@ static void a6xx_get_gmu_registers(struct msm_gpu *gpu,
 	gpu_write(gpu, REG_A6XX_GMU_AO_AHB_FENCE_CTRL, 0);
 
 	_a6xx_get_gmu_registers(gpu, a6xx_state, &a6xx_gmu_reglist[2],
-		&a6xx_state->gmu_registers[2], false);
+		&a6xx_state->gmu_registers[3], false);
 }
 
 static struct msm_gpu_state_bo *a6xx_snapshot_gmu_bo(
diff --git a/drivers/gpu/drm/msm/adreno/a6xx_gpu_state.h b/drivers/gpu/drm/msm/adreno/a6xx_gpu_state.h
index dd4c28a8d9233d8079abaf0065317c1d613dba32..31c7462ab6d7b877c55abc04b98c0a80dac87759 100644
--- a/drivers/gpu/drm/msm/adreno/a6xx_gpu_state.h
+++ b/drivers/gpu/drm/msm/adreno/a6xx_gpu_state.h
@@ -363,6 +363,9 @@ static const u32 a6xx_gmu_cx_registers[] = {
 	0x51e0, 0x51e2, 0x51f0, 0x51f0, 0x5200, 0x5201,
 	/* GMU AO */
 	0x9300, 0x9316, 0x9400, 0x9400,
+};
+
+static const u32 a6xx_gmu_gpucc_registers[] = {
 	/* GPU CC */
 	0x9800, 0x9812, 0x9840, 0x9852, 0x9c00, 0x9c04, 0x9c07, 0x9c0b,
 	0x9c15, 0x9c1c, 0x9c1e, 0x9c2d, 0x9c3c, 0x9c3d, 0x9c3f, 0x9c40,
@@ -386,6 +389,8 @@ static const struct a6xx_registers a6xx_gmu_reglist[] = {
 	REGS(a6xx_gmu_gx_registers, 0, 0),
 };
 
+static const struct a6xx_registers a6xx_gpucc_reg = REGS(a6xx_gmu_gpucc_registers, 0, 0);
+
 static u32 a6xx_get_cp_roq_size(struct msm_gpu *gpu);
 static u32 a7xx_get_cp_roq_size(struct msm_gpu *gpu);
 

-- 
2.48.1