drm/msm/a6xx: use AOP-initialized PDC for a650

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>
Link: https://lore.kernel.org/r/20210608172808.11803-3-jonathan@marek.ca
Signed-off-by: Rob Clark <robdclark@chromium.org>

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);