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Diffstat (limited to 'target/linux/bcm27xx/patches-5.4/950-0345-drm-v3d-Suppress-all-but-the-first-MMU-error.patch')
-rw-r--r--target/linux/bcm27xx/patches-5.4/950-0345-drm-v3d-Suppress-all-but-the-first-MMU-error.patch39
1 files changed, 39 insertions, 0 deletions
diff --git a/target/linux/bcm27xx/patches-5.4/950-0345-drm-v3d-Suppress-all-but-the-first-MMU-error.patch b/target/linux/bcm27xx/patches-5.4/950-0345-drm-v3d-Suppress-all-but-the-first-MMU-error.patch
new file mode 100644
index 0000000000..58f3a44aff
--- /dev/null
+++ b/target/linux/bcm27xx/patches-5.4/950-0345-drm-v3d-Suppress-all-but-the-first-MMU-error.patch
@@ -0,0 +1,39 @@
+From f1f228c84864bad0bb07de1c72ceafaec035ac15 Mon Sep 17 00:00:00 2001
+From: Phil Elwell <phil@raspberrypi.org>
+Date: Mon, 11 Nov 2019 20:18:08 +0000
+Subject: [PATCH] drm/v3d: Suppress all but the first MMU error
+
+The v3d driver currently encounters a lot of MMU PTE exceptions, so
+only log the first to avoid swamping the kernel log.
+
+Signed-off-by: Phil Elwell <phil@raspberrypi.org>
+---
+ drivers/gpu/drm/v3d/v3d_irq.c | 3 +++
+ 1 file changed, 3 insertions(+)
+
+--- a/drivers/gpu/drm/v3d/v3d_irq.c
++++ b/drivers/gpu/drm/v3d/v3d_irq.c
+@@ -177,6 +177,7 @@ v3d_hub_irq(int irq, void *arg)
+ "GMP",
+ };
+ const char *client = "?";
++ static int logged_error;
+
+ V3D_WRITE(V3D_MMU_CTL, V3D_READ(V3D_MMU_CTL));
+
+@@ -186,6 +187,7 @@ v3d_hub_irq(int irq, void *arg)
+ client = v3d41_axi_ids[axi_id];
+ }
+
++ if (!logged_error)
+ dev_err(v3d->dev, "MMU error from client %s (%d) at 0x%llx%s%s%s\n",
+ client, axi_id, (long long)vio_addr,
+ ((intsts & V3D_HUB_INT_MMU_WRV) ?
+@@ -194,6 +196,7 @@ v3d_hub_irq(int irq, void *arg)
+ ", pte invalid" : ""),
+ ((intsts & V3D_HUB_INT_MMU_CAP) ?
+ ", cap exceeded" : ""));
++ logged_error = 1;
+ status = IRQ_HANDLED;
+ }
+