mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-25 00:11:13 +00:00
57 lines
2.0 KiB
Diff
57 lines
2.0 KiB
Diff
|
From 4aad27d1201b4dc3974d682ba52eb798bdb557cd Mon Sep 17 00:00:00 2001
|
||
|
|
From: Dave Stevenson <dave.stevenson@raspberrypi.com>
|
||
|
|
Date: Wed, 22 Nov 2023 18:36:54 +0000
|
||
|
|
Subject: [PATCH 0740/1085] drm: vc4: Free the dlist alloc immediately if it
|
||
|
|
never hit the hw
|
||
|
|
|
||
|
|
atomic_check creates a state, and allocates the dlist memory for
|
||
|
|
it such that atomic_flush can not fail.
|
||
|
|
|
||
|
|
On destroy that dlist allocation was being put in the stale list,
|
||
|
|
even though it had never been programmed into the hardware,
|
||
|
|
therefore doing lots of atomic_checks could consume all the dlist
|
||
|
|
memory and fail.
|
||
|
|
|
||
|
|
If the dlist has never been programmed into the hardware, then
|
||
|
|
free it immediately.
|
||
|
|
|
||
|
|
Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
|
||
|
|
---
|
||
|
|
drivers/gpu/drm/vc4/vc4_drv.h | 1 +
|
||
|
|
drivers/gpu/drm/vc4/vc4_hvs.c | 6 +++++-
|
||
|
|
2 files changed, 6 insertions(+), 1 deletion(-)
|
||
|
|
|
||
|
|
--- a/drivers/gpu/drm/vc4/vc4_drv.h
|
||
|
|
+++ b/drivers/gpu/drm/vc4/vc4_drv.h
|
||
|
|
@@ -667,6 +667,7 @@ struct vc4_hvs_dlist_allocation {
|
||
|
|
struct drm_mm_node mm_node;
|
||
|
|
unsigned int channel;
|
||
|
|
u8 target_frame_count;
|
||
|
|
+ bool dlist_programmed;
|
||
|
|
};
|
||
|
|
|
||
|
|
struct vc4_crtc_state {
|
||
|
|
--- a/drivers/gpu/drm/vc4/vc4_hvs.c
|
||
|
|
+++ b/drivers/gpu/drm/vc4/vc4_hvs.c
|
||
|
|
@@ -697,8 +697,11 @@ void vc4_hvs_mark_dlist_entry_stale(stru
|
||
|
|
* Kunit tests run with a mock device and we consider any hardware
|
||
|
|
* access a test failure. Let's free the dlist allocation right away if
|
||
|
|
* we're running under kunit, we won't risk a dlist corruption anyway.
|
||
|
|
+ *
|
||
|
|
+ * Likewise if the allocation was only checked and never programmed, we
|
||
|
|
+ * can destroy the allocation immediately.
|
||
|
|
*/
|
||
|
|
- if (kunit_get_current_test()) {
|
||
|
|
+ if (kunit_get_current_test() || !alloc->dlist_programmed) {
|
||
|
|
spin_lock_irqsave(&hvs->mm_lock, flags);
|
||
|
|
vc4_hvs_free_dlist_entry_locked(hvs, alloc);
|
||
|
|
spin_unlock_irqrestore(&hvs->mm_lock, flags);
|
||
|
|
@@ -1201,6 +1204,7 @@ static void vc4_hvs_install_dlist(struct
|
||
|
|
return;
|
||
|
|
|
||
|
|
WARN_ON(!vc4_state->mm);
|
||
|
|
+ vc4_state->mm->dlist_programmed = true;
|
||
|
|
|
||
|
|
if (vc4->gen >= VC4_GEN_6)
|
||
|
|
HVS_WRITE(SCALER6_DISPX_LPTRS(vc4_state->assigned_channel),
|