drm/msm: adreno a306 support

As found in apq8016 (used in DragonBoard 410c) and msm8916.

Note that numerically a306 is actually 307 (since a305c already claimed
306).  Nice and confusing.
Signed-off-by: Rob Clark <robdclark@gmail.com>

drivers/gpu/drm/msm/adreno/a3xx_gpu.c

@@ -93,7 +93,10 @@ static int a3xx_hw_init(struct msm_gpu *gpu)
 		/* Set up AOOO: */
 		gpu_write(gpu, REG_A3XX_VBIF_OUT_AXI_AOOO_EN, 0x0000003c);
 		gpu_write(gpu, REG_A3XX_VBIF_OUT_AXI_AOOO, 0x003c003c);
-
+	} else if (adreno_is_a306(adreno_gpu)) {
+		gpu_write(gpu, REG_A3XX_VBIF_ROUND_ROBIN_QOS_ARB, 0x0003);
+		gpu_write(gpu, REG_A3XX_VBIF_OUT_RD_LIM_CONF0, 0x0000000a);
+		gpu_write(gpu, REG_A3XX_VBIF_OUT_WR_LIM_CONF0, 0x0000000a);
 	} else if (adreno_is_a320(adreno_gpu)) {
 		/* Set up 16 deep read/write request queues: */
 		gpu_write(gpu, REG_A3XX_VBIF_IN_RD_LIM_CONF0, 0x10101010);
@@ -186,7 +189,9 @@ static int a3xx_hw_init(struct msm_gpu *gpu)
 	gpu_write(gpu, REG_A3XX_UCHE_CACHE_MODE_CONTROL_REG, 0x00000001);
 
 	/* Enable Clock gating: */
-	if (adreno_is_a320(adreno_gpu))
+	if (adreno_is_a306(adreno_gpu))
+		gpu_write(gpu, REG_A3XX_RBBM_CLOCK_CTL, 0xaaaaaaaa);
+	else if (adreno_is_a320(adreno_gpu))
 		gpu_write(gpu, REG_A3XX_RBBM_CLOCK_CTL, 0xbfffffff);
 	else if (adreno_is_a330v2(adreno_gpu))
 		gpu_write(gpu, REG_A3XX_RBBM_CLOCK_CTL, 0xaaaaaaaa);
@@ -271,7 +276,8 @@ static int a3xx_hw_init(struct msm_gpu *gpu)
 		gpu_write(gpu, REG_A3XX_CP_PFP_UCODE_DATA, ptr[i]);
 
 	/* CP ROQ queue sizes (bytes) - RB:16, ST:16, IB1:32, IB2:64 */
-	if (adreno_is_a305(adreno_gpu) || adreno_is_a320(adreno_gpu)) {
+	if (adreno_is_a305(adreno_gpu) || adreno_is_a306(adreno_gpu) ||
+			adreno_is_a320(adreno_gpu)) {
 		gpu_write(gpu, REG_AXXX_CP_QUEUE_THRESHOLDS,
 				AXXX_CP_QUEUE_THRESHOLDS_CSQ_IB1_START(2) |
 				AXXX_CP_QUEUE_THRESHOLDS_CSQ_IB2_START(6) |

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

@@ -41,6 +41,14 @@ static const struct adreno_info gpulist[] = {
 		.pfpfw = "a300_pfp.fw",
 		.gmem  = SZ_256K,
 		.init  = a3xx_gpu_init,
+	}, {
+		.rev   = ADRENO_REV(3, 0, 6, 0),
+		.revn  = 307,        /* because a305c is revn==306 */
+		.name  = "A306",
+		.pm4fw = "a300_pm4.fw",
+		.pfpfw = "a300_pfp.fw",
+		.gmem  = SZ_128K,
+		.init  = a3xx_gpu_init,
 	}, {
 		.rev   = ADRENO_REV(3, 2, ANY_ID, ANY_ID),
 		.revn  = 320,

drivers/gpu/drm/msm/adreno/adreno_gpu.h

@@ -197,6 +197,12 @@ static inline bool adreno_is_a305(struct adreno_gpu *gpu)
 	return gpu->revn == 305;
 }
 
+static inline bool adreno_is_a306(struct adreno_gpu *gpu)
+{
+	/* yes, 307, because a305c is 306 */
+	return gpu->revn == 307;
+}
+
 static inline bool adreno_is_a320(struct adreno_gpu *gpu)
 {
 	return gpu->revn == 320;

drivers/gpu/drm/msm/msm_gpu.c

@@ -522,6 +522,7 @@ static irqreturn_t irq_handler(int irq, void *data)
 
 static const char *clk_names[] = {
 		"src_clk", "core_clk", "iface_clk", "mem_clk", "mem_iface_clk",
+		"alt_mem_iface_clk",
 };
 
 int msm_gpu_init(struct drm_device *drm, struct platform_device *pdev,

drivers/gpu/drm/msm/msm_gpu.h

@@ -100,7 +100,7 @@ struct msm_gpu {
 
 	/* Power Control: */
 	struct regulator *gpu_reg, *gpu_cx;
-	struct clk *ebi1_clk, *grp_clks[5];
+	struct clk *ebi1_clk, *grp_clks[6];
 	uint32_t fast_rate, slow_rate, bus_freq;
 
 #ifdef DOWNSTREAM_CONFIG_MSM_BUS_SCALING