drm/etnaviv: add PE perf domain

We need to iterate over all pixel pipelines to get overall value.

Changes from v4 -> v5:
- switch back to pixel pipe 0 to prevent GPU hang
- PIXELS_RENDERED_2D is exposed for 2D pipe

Signed-off-by: Christian Gmeiner <christian.gmeiner@gmail.com>
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>

drivers/gpu/drm/etnaviv/etnaviv_perfmon.c

@@ -62,6 +62,30 @@ static u32 perf_reg_read(struct etnaviv_gpu *gpu,
 	return gpu_read(gpu, domain->profile_read);
 }
 
+static u32 pipe_reg_read(struct etnaviv_gpu *gpu,
+	const struct etnaviv_pm_domain *domain,
+	const struct etnaviv_pm_signal *signal)
+{
+	u32 clock = gpu_read(gpu, VIVS_HI_CLOCK_CONTROL);
+	u32 value = 0;
+	unsigned i;
+
+	for (i = 0; i < gpu->identity.pixel_pipes; i++) {
+		clock &= ~(VIVS_HI_CLOCK_CONTROL_DEBUG_PIXEL_PIPE__MASK);
+		clock |= VIVS_HI_CLOCK_CONTROL_DEBUG_PIXEL_PIPE(i);
+		gpu_write(gpu, VIVS_HI_CLOCK_CONTROL, clock);
+		gpu_write(gpu, domain->profile_config, signal->data);
+		value += gpu_read(gpu, domain->profile_read);
+	}
+
+	/* switch back to pixel pipe 0 to prevent GPU hang */
+	clock &= ~(VIVS_HI_CLOCK_CONTROL_DEBUG_PIXEL_PIPE__MASK);
+	clock |= VIVS_HI_CLOCK_CONTROL_DEBUG_PIXEL_PIPE(0);
+	gpu_write(gpu, VIVS_HI_CLOCK_CONTROL, clock);
+
+	return value;
+}
+
 static const struct etnaviv_pm_domain doms_3d[] = {
 	{
 		.name = "HI",
@@ -95,10 +119,51 @@ static const struct etnaviv_pm_domain doms_3d[] = {
 				&perf_reg_read
 			}
 		}
+	},
+	{
+		.name = "PE",
+		.profile_read = VIVS_MC_PROFILE_PE_READ,
+		.profile_config = VIVS_MC_PROFILE_CONFIG0,
+		.nr_signals = 5,
+		.signal = (const struct etnaviv_pm_signal[]) {
+			{
+				"PIXEL_COUNT_KILLED_BY_COLOR_PIPE",
+				VIVS_MC_PROFILE_CONFIG0_PE_PIXEL_COUNT_KILLED_BY_COLOR_PIPE,
+				&pipe_reg_read
+			},
+			{
+				"PIXEL_COUNT_KILLED_BY_DEPTH_PIPE",
+				VIVS_MC_PROFILE_CONFIG0_PE_PIXEL_COUNT_KILLED_BY_DEPTH_PIPE,
+				&pipe_reg_read
+			},
+			{
+				"PIXEL_COUNT_DRAWN_BY_COLOR_PIPE",
+				VIVS_MC_PROFILE_CONFIG0_PE_PIXEL_COUNT_DRAWN_BY_COLOR_PIPE,
+				&pipe_reg_read
+			},
+			{
+				"PIXEL_COUNT_DRAWN_BY_DEPTH_PIPE",
+				VIVS_MC_PROFILE_CONFIG0_PE_PIXEL_COUNT_DRAWN_BY_DEPTH_PIPE,
+				&pipe_reg_read
+			}
+		}
 	}
 };
 
 static const struct etnaviv_pm_domain doms_2d[] = {
+	{
+		.name = "PE",
+		.profile_read = VIVS_MC_PROFILE_PE_READ,
+		.profile_config = VIVS_MC_PROFILE_CONFIG0,
+		.nr_signals = 1,
+		.signal = (const struct etnaviv_pm_signal[]) {
+			{
+				"PIXELS_RENDERED_2D",
+				VIVS_MC_PROFILE_CONFIG0_PE_PIXELS_RENDERED_2D,
+				&pipe_reg_read
+			}
+		}
+	}
 };
 
 static const struct etnaviv_pm_domain doms_vg[] = {