diff options
Diffstat (limited to 'target/linux/brcm2708/patches-4.4/0467-drm-vc4-Use-runtime-PM-to-power-cycle-the-device-whe.patch')
| -rw-r--r-- | target/linux/brcm2708/patches-4.4/0467-drm-vc4-Use-runtime-PM-to-power-cycle-the-device-whe.patch | 102 |
1 files changed, 0 insertions, 102 deletions
diff --git a/target/linux/brcm2708/patches-4.4/0467-drm-vc4-Use-runtime-PM-to-power-cycle-the-device-whe.patch b/target/linux/brcm2708/patches-4.4/0467-drm-vc4-Use-runtime-PM-to-power-cycle-the-device-whe.patch deleted file mode 100644 index 6f288002e9..0000000000 --- a/target/linux/brcm2708/patches-4.4/0467-drm-vc4-Use-runtime-PM-to-power-cycle-the-device-whe.patch +++ /dev/null @@ -1,102 +0,0 @@ -From a933cf6cc414d067087f311598e4acd42bc4f6d2 Mon Sep 17 00:00:00 2001 -From: Eric Anholt <eric@anholt.net> -Date: Mon, 8 Feb 2016 12:59:02 -0800 -Subject: [PATCH] drm/vc4: Use runtime PM to power cycle the device when the - GPU hangs. - -This gets us functional GPU reset again, like we had until a refactor -at merge time. Tested with a little patch to stuff in a broken binner -job every 100 frames. - -Signed-off-by: Eric Anholt <eric@anholt.net> -(cherry picked from commit 36cb6253f9383fd9a59ee7b8458c6232ef48577c) ---- - drivers/gpu/drm/vc4/vc4_drv.h | 6 +++++- - drivers/gpu/drm/vc4/vc4_gem.c | 26 +++++++++++++++++++++----- - 2 files changed, 26 insertions(+), 6 deletions(-) - ---- a/drivers/gpu/drm/vc4/vc4_drv.h -+++ b/drivers/gpu/drm/vc4/vc4_drv.h -@@ -104,6 +104,11 @@ struct vc4_dev { - struct vc4_bo *overflow_mem; - struct work_struct overflow_mem_work; - -+ int power_refcount; -+ -+ /* Mutex controlling the power refcount. */ -+ struct mutex power_lock; -+ - struct { - struct timer_list timer; - struct work_struct reset_work; -@@ -495,7 +500,6 @@ void vc4_plane_async_set_fb(struct drm_p - extern struct platform_driver vc4_v3d_driver; - int vc4_v3d_debugfs_ident(struct seq_file *m, void *unused); - int vc4_v3d_debugfs_regs(struct seq_file *m, void *unused); --int vc4_v3d_set_power(struct vc4_dev *vc4, bool on); - - /* vc4_validate.c */ - int ---- a/drivers/gpu/drm/vc4/vc4_gem.c -+++ b/drivers/gpu/drm/vc4/vc4_gem.c -@@ -261,8 +261,16 @@ vc4_reset(struct drm_device *dev) - struct vc4_dev *vc4 = to_vc4_dev(dev); - - DRM_INFO("Resetting GPU.\n"); -- vc4_v3d_set_power(vc4, false); -- vc4_v3d_set_power(vc4, true); -+ -+ mutex_lock(&vc4->power_lock); -+ if (vc4->power_refcount) { -+ /* Power the device off and back on the by dropping the -+ * reference on runtime PM. -+ */ -+ pm_runtime_put_sync_suspend(&vc4->v3d->pdev->dev); -+ pm_runtime_get_sync(&vc4->v3d->pdev->dev); -+ } -+ mutex_unlock(&vc4->power_lock); - - vc4_irq_reset(dev); - -@@ -709,7 +717,10 @@ vc4_complete_exec(struct drm_device *dev - } - mutex_unlock(&dev->struct_mutex); - -- pm_runtime_put(&vc4->v3d->pdev->dev); -+ mutex_lock(&vc4->power_lock); -+ if (--vc4->power_refcount == 0) -+ pm_runtime_put(&vc4->v3d->pdev->dev); -+ mutex_unlock(&vc4->power_lock); - - kfree(exec); - } -@@ -851,7 +862,7 @@ vc4_submit_cl_ioctl(struct drm_device *d - struct vc4_dev *vc4 = to_vc4_dev(dev); - struct drm_vc4_submit_cl *args = data; - struct vc4_exec_info *exec; -- int ret; -+ int ret = 0; - - if ((args->flags & ~VC4_SUBMIT_CL_USE_CLEAR_COLOR) != 0) { - DRM_ERROR("Unknown flags: 0x%02x\n", args->flags); -@@ -864,7 +875,10 @@ vc4_submit_cl_ioctl(struct drm_device *d - return -ENOMEM; - } - -- ret = pm_runtime_get_sync(&vc4->v3d->pdev->dev); -+ mutex_lock(&vc4->power_lock); -+ if (vc4->power_refcount++ == 0) -+ ret = pm_runtime_get_sync(&vc4->v3d->pdev->dev); -+ mutex_unlock(&vc4->power_lock); - if (ret < 0) { - kfree(exec); - return ret; -@@ -925,6 +939,8 @@ vc4_gem_init(struct drm_device *dev) - (unsigned long)dev); - - INIT_WORK(&vc4->job_done_work, vc4_job_done_work); -+ -+ mutex_init(&vc4->power_lock); - } - - void |