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From:   Jonathan Marek <jonathan@marek.ca>
To:     freedreno@lists.freedesktop.org
Cc:     Rob Clark <robdclark@gmail.com>, Sean Paul <sean@poorly.run>,
        David Airlie <airlied@linux.ie>,
        Daniel Vetter <daniel@ffwll.ch>,
        Jordan Crouse <jordan@cosmicpenguin.net>,
        Akhil P Oommen <akhilpo@codeaurora.org>,
        Eric Anholt <eric@anholt.net>,
        Sharat Masetty <smasetty@codeaurora.org>,
        linux-arm-msm@vger.kernel.org (open list:DRM DRIVER FOR MSM ADRENO GPU),
        dri-devel@lists.freedesktop.org (open list:DRM DRIVER FOR MSM ADRENO
        GPU), linux-kernel@vger.kernel.org (open list)
Subject: [PATCH v3 2/5] drm/msm/a6xx: use AOP-initialized PDC for a650
Date:   Tue,  8 Jun 2021 13:27:45 -0400
Message-Id: <20210608172808.11803-3-jonathan@marek.ca>
In-Reply-To: <20210608172808.11803-1-jonathan@marek.ca>
References: <20210608172808.11803-1-jonathan@marek.ca>
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SM8250 AOP firmware already sets up PDC registers for us, and it only needs
to be enabled. This path will be used for other newer GPUs.

Signed-off-by: Jonathan Marek <jonathan@marek.ca>
---
 drivers/gpu/drm/msm/adreno/a6xx_gmu.c | 21 ++++++++++++++++-----
 1 file changed, 16 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/msm/adreno/a6xx_gmu.c b/drivers/gpu/drm/msm/adreno/a6xx_gmu.c
index 3d55e153fa9c..c1ee02d6371d 100644
--- a/drivers/gpu/drm/msm/adreno/a6xx_gmu.c
+++ b/drivers/gpu/drm/msm/adreno/a6xx_gmu.c
@@ -512,19 +512,26 @@ static void a6xx_gmu_rpmh_init(struct a6xx_gmu *gmu)
 	struct adreno_gpu *adreno_gpu = &a6xx_gpu->base;
 	struct platform_device *pdev = to_platform_device(gmu->dev);
 	void __iomem *pdcptr = a6xx_gmu_get_mmio(pdev, "gmu_pdc");
-	void __iomem *seqptr = a6xx_gmu_get_mmio(pdev, "gmu_pdc_seq");
+	void __iomem *seqptr;
 	uint32_t pdc_address_offset;
+	bool pdc_in_aop = false;
 
-	if (!pdcptr || !seqptr)
+	if (!pdcptr)
 		goto err;
 
-	if (adreno_is_a618(adreno_gpu) || adreno_is_a640(adreno_gpu))
+	if (adreno_is_a650(adreno_gpu))
+		pdc_in_aop = true;
+	else if (adreno_is_a618(adreno_gpu) || adreno_is_a640(adreno_gpu))
 		pdc_address_offset = 0x30090;
-	else if (adreno_is_a650(adreno_gpu))
-		pdc_address_offset = 0x300a0;
 	else
 		pdc_address_offset = 0x30080;
 
+	if (!pdc_in_aop) {
+		seqptr = a6xx_gmu_get_mmio(pdev, "gmu_pdc_seq");
+		if (!seqptr)
+			goto err;
+	}
+
 	/* Disable SDE clock gating */
 	gmu_write_rscc(gmu, REG_A6XX_GPU_RSCC_RSC_STATUS0_DRV0, BIT(24));
 
@@ -556,6 +563,9 @@ static void a6xx_gmu_rpmh_init(struct a6xx_gmu *gmu)
 		gmu_write_rscc(gmu, REG_A6XX_RSCC_SEQ_MEM_0_DRV0 + 4, 0x0020e8a8);
 	}
 
+	if (pdc_in_aop)
+		goto setup_pdc;
+
 	/* Load PDC sequencer uCode for power up and power down sequence */
 	pdc_write(seqptr, REG_A6XX_PDC_GPU_SEQ_MEM_0, 0xfebea1e1);
 	pdc_write(seqptr, REG_A6XX_PDC_GPU_SEQ_MEM_0 + 1, 0xa5a4a3a2);
@@ -596,6 +606,7 @@ static void a6xx_gmu_rpmh_init(struct a6xx_gmu *gmu)
 	pdc_write(pdcptr, REG_A6XX_PDC_GPU_TCS3_CMD0_DATA + 8, 0x3);
 
 	/* Setup GPU PDC */
+setup_pdc:
 	pdc_write(pdcptr, REG_A6XX_PDC_GPU_SEQ_START_ADDR, 0);
 	pdc_write(pdcptr, REG_A6XX_PDC_GPU_ENABLE_PDC, 0x80000001);
 
-- 
2.26.1