1 files changed, 60 insertions, 25 deletions

diff --git a/drivers/gpu/drm/panfrost/panfrost_gpu.c b/drivers/gpu/drm/panfrost/panfrost_gpu.c
index f0be7e19b13e..09f5e1563ebd 100644
--- a/drivers/gpu/drm/panfrost/panfrost_gpu.c
+++ b/drivers/gpu/drm/panfrost/panfrost_gpu.c
@@ -60,14 +60,21 @@ int panfrost_gpu_soft_reset(struct panfrost_device *pfdev)
 
 	gpu_write(pfdev, GPU_INT_MASK, 0);
 	gpu_write(pfdev, GPU_INT_CLEAR, GPU_IRQ_RESET_COMPLETED);
-	gpu_write(pfdev, GPU_CMD, GPU_CMD_SOFT_RESET);
 
+	gpu_write(pfdev, GPU_CMD, GPU_CMD_SOFT_RESET);
 	ret = readl_relaxed_poll_timeout(pfdev->iomem + GPU_INT_RAWSTAT,
-		val, val & GPU_IRQ_RESET_COMPLETED, 100, 10000);
+		val, val & GPU_IRQ_RESET_COMPLETED, 10, 10000);
 
 	if (ret) {
-		dev_err(pfdev->dev, "gpu soft reset timed out\n");
-		return ret;
+		dev_err(pfdev->dev, "gpu soft reset timed out, attempting hard reset\n");
+
+		gpu_write(pfdev, GPU_CMD, GPU_CMD_HARD_RESET);
+		ret = readl_relaxed_poll_timeout(pfdev->iomem + GPU_INT_RAWSTAT, val,
+						 val & GPU_IRQ_RESET_COMPLETED, 100, 10000);
+		if (ret) {
+			dev_err(pfdev->dev, "gpu hard reset timed out\n");
+			return ret;
+		}
 	}
 
 	gpu_write(pfdev, GPU_INT_CLEAR, GPU_IRQ_MASK_ALL);
@@ -362,32 +369,42 @@ unsigned long long panfrost_cycle_counter_read(struct panfrost_device *pfdev)
 	return ((u64)hi << 32) | lo;
 }
 
+static u64 panfrost_get_core_mask(struct panfrost_device *pfdev)
+{
+	u64 core_mask;
+
+	if (pfdev->features.l2_present == 1)
+		return U64_MAX;
+
+	/*
+	 * Only support one core group now.
+	 * ~(l2_present - 1) unsets all bits in l2_present except
+	 * the bottom bit. (l2_present - 2) has all the bits in
+	 * the first core group set. AND them together to generate
+	 * a mask of cores in the first core group.
+	 */
+	core_mask = ~(pfdev->features.l2_present - 1) &
+		     (pfdev->features.l2_present - 2);
+	dev_info_once(pfdev->dev, "using only 1st core group (%lu cores from %lu)\n",
+		      hweight64(core_mask),
+		      hweight64(pfdev->features.shader_present));
+
+	return core_mask;
+}
+
 void panfrost_gpu_power_on(struct panfrost_device *pfdev)
 {
 	int ret;
 	u32 val;
-	u64 core_mask = U64_MAX;
+	u64 core_mask;
 
 	panfrost_gpu_init_quirks(pfdev);
+	core_mask = panfrost_get_core_mask(pfdev);
 
-	if (pfdev->features.l2_present != 1) {
-		/*
-		 * Only support one core group now.
-		 * ~(l2_present - 1) unsets all bits in l2_present except
-		 * the bottom bit. (l2_present - 2) has all the bits in
-		 * the first core group set. AND them together to generate
-		 * a mask of cores in the first core group.
-		 */
-		core_mask = ~(pfdev->features.l2_present - 1) &
-			     (pfdev->features.l2_present - 2);
-		dev_info_once(pfdev->dev, "using only 1st core group (%lu cores from %lu)\n",
-			      hweight64(core_mask),
-			      hweight64(pfdev->features.shader_present));
-	}
 	gpu_write(pfdev, L2_PWRON_LO, pfdev->features.l2_present & core_mask);
 	ret = readl_relaxed_poll_timeout(pfdev->iomem + L2_READY_LO,
 		val, val == (pfdev->features.l2_present & core_mask),
-		100, 20000);
+		10, 20000);
 	if (ret)
 		dev_err(pfdev->dev, "error powering up gpu L2");
 
@@ -395,22 +412,40 @@ void panfrost_gpu_power_on(struct panfrost_device *pfdev)
 		  pfdev->features.shader_present & core_mask);
 	ret = readl_relaxed_poll_timeout(pfdev->iomem + SHADER_READY_LO,
 		val, val == (pfdev->features.shader_present & core_mask),
-		100, 20000);
+		10, 20000);
 	if (ret)
 		dev_err(pfdev->dev, "error powering up gpu shader");
 
 	gpu_write(pfdev, TILER_PWRON_LO, pfdev->features.tiler_present);
 	ret = readl_relaxed_poll_timeout(pfdev->iomem + TILER_READY_LO,
-		val, val == pfdev->features.tiler_present, 100, 1000);
+		val, val == pfdev->features.tiler_present, 10, 1000);
 	if (ret)
 		dev_err(pfdev->dev, "error powering up gpu tiler");
 }
 
 void panfrost_gpu_power_off(struct panfrost_device *pfdev)
 {
-	gpu_write(pfdev, TILER_PWROFF_LO, 0);
-	gpu_write(pfdev, SHADER_PWROFF_LO, 0);
-	gpu_write(pfdev, L2_PWROFF_LO, 0);
+	u64 core_mask = panfrost_get_core_mask(pfdev);
+	int ret;
+	u32 val;
+
+	gpu_write(pfdev, SHADER_PWROFF_LO, pfdev->features.shader_present & core_mask);
+	ret = readl_relaxed_poll_timeout(pfdev->iomem + SHADER_PWRTRANS_LO,
+					 val, !val, 1, 1000);
+	if (ret)
+		dev_err(pfdev->dev, "shader power transition timeout");
+
+	gpu_write(pfdev, TILER_PWROFF_LO, pfdev->features.tiler_present);
+	ret = readl_relaxed_poll_timeout(pfdev->iomem + TILER_PWRTRANS_LO,
+					 val, !val, 1, 1000);
+	if (ret)
+		dev_err(pfdev->dev, "tiler power transition timeout");
+
+	gpu_write(pfdev, L2_PWROFF_LO, pfdev->features.l2_present & core_mask);
+	ret = readl_poll_timeout(pfdev->iomem + L2_PWRTRANS_LO,
+				 val, !val, 0, 1000);
+	if (ret)
+		dev_err(pfdev->dev, "l2 power transition timeout");
 }
 
 int panfrost_gpu_init(struct panfrost_device *pfdev)