mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-25 08:21:14 +00:00
20ea6adbf1
Build system: x86_64 Build-tested: bcm2708, bcm2709, bcm2710, bcm2711 Run-tested: bcm2708/RPiB+, bcm2709/RPi3B, bcm2710/RPi3B, bcm2711/RPi4B Signed-off-by: Marty Jones <mj8263788@gmail.com> Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
53 lines
1.4 KiB
Diff
53 lines
1.4 KiB
Diff
From 15d0d4bb7c817c3cbcdb276d911b9e93a0c825e9 Mon Sep 17 00:00:00 2001
|
|
From: Eric Anholt <eric@anholt.net>
|
|
Date: Mon, 14 Jan 2019 12:35:43 -0800
|
|
Subject: [PATCH] drm/v3d: Skip MMU flush if the device is currently
|
|
off.
|
|
|
|
If it's off, we know it will be reset on poweron, so the MMU won't
|
|
have any TLB cached from before this point. Avoids failed waits for
|
|
MMU flush to reply.
|
|
|
|
Signed-off-by: Eric Anholt <eric@anholt.net>
|
|
(cherry picked from commit 3ee4e2e0a9e9587eacbb69b067bbc72ab2cdc47b)
|
|
---
|
|
drivers/gpu/drm/v3d/v3d_mmu.c | 13 +++++++++++++
|
|
1 file changed, 13 insertions(+)
|
|
|
|
--- a/drivers/gpu/drm/v3d/v3d_mmu.c
|
|
+++ b/drivers/gpu/drm/v3d/v3d_mmu.c
|
|
@@ -18,6 +18,8 @@
|
|
* each client. This is not yet implemented.
|
|
*/
|
|
|
|
+#include <linux/pm_runtime.h>
|
|
+
|
|
#include "v3d_drv.h"
|
|
#include "v3d_regs.h"
|
|
|
|
@@ -34,6 +36,14 @@ static int v3d_mmu_flush_all(struct v3d_
|
|
{
|
|
int ret;
|
|
|
|
+ /* Keep power on the device on until we're done with this
|
|
+ * call, but skip the flush if the device is off and will be
|
|
+ * reset when powered back on.
|
|
+ */
|
|
+ ret = pm_runtime_get_if_in_use(v3d->dev);
|
|
+ if (ret == 0)
|
|
+ return 0;
|
|
+
|
|
/* Make sure that another flush isn't already running when we
|
|
* start this one.
|
|
*/
|
|
@@ -61,6 +71,9 @@ static int v3d_mmu_flush_all(struct v3d_
|
|
if (ret)
|
|
dev_err(v3d->drm.dev, "MMUC flush wait idle failed\n");
|
|
|
|
+ pm_runtime_mark_last_busy(v3d->dev);
|
|
+ pm_runtime_put_autosuspend(v3d->dev);
|
|
+
|
|
return ret;
|
|
}
|
|
|