mirror of
https://git.openwrt.org/openwrt/openwrt.git
synced 2024-11-22 04:56:15 +00:00
8c405cdccc
The patches were generated from the RPi repo with the following command: git format-patch v6.6.34..rpi-6.1.y Some patches needed rebasing and, as usual, the applied and reverted, wireless drivers, Github workflows, READMEs and defconfigs patches were removed. Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
70 lines
2.5 KiB
Diff
70 lines
2.5 KiB
Diff
From e33f46eba97edbaff7744bfd5c5a093cd2c567d3 Mon Sep 17 00:00:00 2001
|
|
From: Dave Stevenson <dave.stevenson@raspberrypi.com>
|
|
Date: Wed, 17 Jan 2024 18:36:11 +0000
|
|
Subject: [PATCH 0837/1085] drm/vc4: Flush stale dlist entries if allocation
|
|
fails
|
|
|
|
This is largely for debug at present.
|
|
For reasons unknown we are not getting the end of frame interrupts
|
|
that should trigger a sweep of stale dlist entries.
|
|
|
|
On allocation failure clear out ALL stale entries, and retry the
|
|
allocation. Log the interrupt status so we have debug regarding
|
|
whether the HVS believes the interrupt is enabled.
|
|
|
|
Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
|
|
---
|
|
drivers/gpu/drm/vc4/vc4_hvs.c | 27 ++++++++++++++++++++++++---
|
|
1 file changed, 24 insertions(+), 3 deletions(-)
|
|
|
|
--- a/drivers/gpu/drm/vc4/vc4_hvs.c
|
|
+++ b/drivers/gpu/drm/vc4/vc4_hvs.c
|
|
@@ -693,6 +693,9 @@ static void vc4_hvs_irq_clear_eof(struct
|
|
hvs->eof_irq[channel].enabled = false;
|
|
}
|
|
|
|
+static void vc4_hvs_free_dlist_entry_locked(struct vc4_hvs *hvs,
|
|
+ struct vc4_hvs_dlist_allocation *alloc);
|
|
+
|
|
static struct vc4_hvs_dlist_allocation *
|
|
vc4_hvs_alloc_dlist_entry(struct vc4_hvs *hvs,
|
|
unsigned int channel,
|
|
@@ -701,6 +704,7 @@ vc4_hvs_alloc_dlist_entry(struct vc4_hvs
|
|
struct vc4_dev *vc4 = hvs->vc4;
|
|
struct drm_device *dev = &vc4->base;
|
|
struct vc4_hvs_dlist_allocation *alloc;
|
|
+ struct vc4_hvs_dlist_allocation *cur, *next;
|
|
unsigned long flags;
|
|
int ret;
|
|
|
|
@@ -718,9 +722,26 @@ vc4_hvs_alloc_dlist_entry(struct vc4_hvs
|
|
dlist_count);
|
|
spin_unlock_irqrestore(&hvs->mm_lock, flags);
|
|
if (ret) {
|
|
- drm_err(dev, "Failed to allocate DLIST entry. Requested size=%zu. ret=%d\n",
|
|
- dlist_count, ret);
|
|
- return ERR_PTR(ret);
|
|
+ drm_err(dev, "Failed to allocate DLIST entry. Requested size=%zu. ret=%d. DISPCTRL is %08x\n",
|
|
+ dlist_count, ret, HVS_READ(SCALER_DISPCTRL));
|
|
+
|
|
+ /* This should never happen as stale entries should get released
|
|
+ * as the frame counter interrupt triggers.
|
|
+ * However we've seen this fail for reasons currently unknown.
|
|
+ * Free all stale entries now so we should be able to complete
|
|
+ * this allocation.
|
|
+ */
|
|
+ spin_lock_irqsave(&hvs->mm_lock, flags);
|
|
+ list_for_each_entry_safe(cur, next, &hvs->stale_dlist_entries, node) {
|
|
+ vc4_hvs_free_dlist_entry_locked(hvs, cur);
|
|
+ }
|
|
+
|
|
+ ret = drm_mm_insert_node(&hvs->dlist_mm, &alloc->mm_node,
|
|
+ dlist_count);
|
|
+ spin_unlock_irqrestore(&hvs->mm_lock, flags);
|
|
+
|
|
+ if (ret)
|
|
+ return ERR_PTR(ret);
|
|
}
|
|
|
|
alloc->channel = channel;
|