[PATCH 4/4] Print details in case of a protect fault interrupt

[C Stout]

From: cstout <cstout at google.com>

Change-Id: I44f9854e7a7458730d9bfbfeef3361c438e381d2
---
 drivers/gpu/drm/msm/adreno/a4xx_gpu.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/gpu/drm/msm/adreno/a4xx_gpu.c b/drivers/gpu/drm/msm/adreno/a4xx_gpu.c
index 9aab904..496732d 100644
--- a/drivers/gpu/drm/msm/adreno/a4xx_gpu.c
+++ b/drivers/gpu/drm/msm/adreno/a4xx_gpu.c
@@ -357,6 +357,13 @@ static irqreturn_t a4xx_irq(struct msm_gpu *gpu)
 	status = gpu_read(gpu, REG_A4XX_RBBM_INT_0_STATUS);
 	DBG("%s: Int status %08x", gpu->name, status);
 
+	if (status & (1 << A4XX_INT_CP_REG_PROTECT_FAULT)) {
+		uint32_t reg = gpu_read(gpu, REG_A4XX_CP_PROTECT_STATUS);
+		printk("CP | Protected mode error| %s | addr=%x\n",
+			reg & (1 << 24) ? "WRITE" : "READ",
+			(reg & 0xFFFFF) >> 2);
+	}
+
 	gpu_write(gpu, REG_A4XX_RBBM_INT_CLEAR_CMD, status);
 
 	msm_gpu_retire(gpu);
-- 
2.1.4