drm/msm/adreno: Introduce gmu_chipid for a740 & a750

To simplify, introduce the new gmu_chipid for a740 & a750 GPUs.
Signed-off-by: Akhil P Oommen <quic_akhilpo@quicinc.com>
Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Patchwork: https://patchwork.freedesktop.org/patch/601396/Signed-off-by: Rob Clark <robdclark@chromium.org>

drivers/gpu/drm/msm/adreno/a6xx_catalog.c

@@ -1206,6 +1206,7 @@ static const struct adreno_info a7xx_gpus[] = {
 		.a6xx = &(const struct a6xx_info) {
 			.hwcg = a740_hwcg,
 			.protect = &a730_protect,
+			.gmu_chipid = 0x7020100,
 		},
 		.address_space_size = SZ_16G,
 	}, {
@@ -1241,6 +1242,7 @@ static const struct adreno_info a7xx_gpus[] = {
 		.zapfw = "gen70900_zap.mbn",
 		.a6xx = &(const struct a6xx_info) {
 			.protect = &a730_protect,
+			.gmu_chipid = 0x7090100,
 		},
 		.address_space_size = SZ_16G,
 	}

drivers/gpu/drm/msm/adreno/a6xx_gmu.c

@@ -769,7 +769,7 @@ static int a6xx_gmu_fw_start(struct a6xx_gmu *gmu, unsigned int state)
 	struct adreno_gpu *adreno_gpu = &a6xx_gpu->base;
 	const struct a6xx_info *a6xx_info = adreno_gpu->info->a6xx;
 	u32 fence_range_lower, fence_range_upper;
-	u32 chipid, chipid_min = 0;
+	u32 chipid = 0;
 	int ret;
 
 	/* Vote veto for FAL10 */
@@ -831,27 +831,6 @@ static int a6xx_gmu_fw_start(struct a6xx_gmu *gmu, unsigned int state)
 
 	if (a6xx_info->gmu_chipid) {
 		chipid = a6xx_info->gmu_chipid;
-	/* NOTE: A730 may also fall in this if-condition with a future GMU fw update. */
-	} else if (adreno_is_a7xx(adreno_gpu) && !adreno_is_a730(adreno_gpu)) {
-		/* A7xx GPUs have obfuscated chip IDs. Use constant maj = 7 */
-		chipid = FIELD_PREP(GENMASK(31, 24), 0x7);
-
-		/*
-		 * The min part has a 1-1 mapping for each GPU SKU.
-		 * This chipid that the GMU expects corresponds to the "GENX_Y_Z" naming,
-		 * where X = major, Y = minor, Z = patchlevel, e.g. GEN7_2_1 for prod A740.
-		 */
-		if (adreno_is_a740(adreno_gpu))
-			chipid_min = 2;
-		else if (adreno_is_a750(adreno_gpu))
-			chipid_min = 9;
-		else
-			return -EINVAL;
-
-		chipid |= FIELD_PREP(GENMASK(23, 16), chipid_min);
-
-		/* Get the patchid (which may vary) from the device tree */
-		chipid |= FIELD_PREP(GENMASK(15, 8), adreno_patchid(adreno_gpu));
 	} else {
 		/*
 		 * Note that the GMU has a slightly different layout for