diff options
| author | Christian Koenig <christian.koenig@amd.com> | 2012-05-17 01:33:30 +0200 |
|---|---|---|
| committer | Christian König <deathsimple@vodafone.de> | 2012-06-21 09:38:50 +0200 |
| commit | fb98257a9d9d2089972b18079d5bdd4412e107e2 (patch) | |
| tree | 72f6115ccae023c1e6122bdd82cf310c8014de23 /drivers/gpu/drm/radeon/radeon_pm.c | |
| parent | c20dc3698dc7ecf053e2bf77299ae5982c0c2c45 (diff) | |
| download | linux-fb98257a9d9d2089972b18079d5bdd4412e107e2.tar.bz2 | |
drm/radeon: apply Murphy's law to the kms irq code v3
1. It is really dangerous to have more than one
spinlock protecting the same information.
2. radeon_irq_set sometimes wasn't called with lock
protection, so it can happen that more than one
CPU would tamper with the irq regs at the same
time.
3. The pm.gui_idle variable was assuming that the 3D
engine wasn't becoming idle between testing the
register and setting the variable. So just remove
it and test the register directly.
v2: Also handle the hpd irq code the same way.
v3: Rename hpd parameter for clarification.
Signed-off-by: Christian Koenig <christian.koenig@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/radeon/radeon_pm.c')
| -rw-r--r-- | drivers/gpu/drm/radeon/radeon_pm.c | 12 |
1 files changed, 2 insertions, 10 deletions
diff --git a/drivers/gpu/drm/radeon/radeon_pm.c b/drivers/gpu/drm/radeon/radeon_pm.c index 9dc0b54fe3e3..7ae606600107 100644 --- a/drivers/gpu/drm/radeon/radeon_pm.c +++ b/drivers/gpu/drm/radeon/radeon_pm.c @@ -34,7 +34,6 @@ #define RADEON_IDLE_LOOP_MS 100 #define RADEON_RECLOCK_DELAY_MS 200 #define RADEON_WAIT_VBLANK_TIMEOUT 200 -#define RADEON_WAIT_IDLE_TIMEOUT 200 static const char *radeon_pm_state_type_name[5] = { "Default", @@ -257,15 +256,8 @@ static void radeon_pm_set_clocks(struct radeon_device *rdev) /* gui idle int has issues on older chips it seems */ if (rdev->family >= CHIP_R600) { if (rdev->irq.installed) { - /* wait for GPU idle */ - rdev->pm.gui_idle = false; - rdev->irq.gui_idle = true; - radeon_irq_set(rdev); - wait_event_interruptible_timeout( - rdev->irq.idle_queue, rdev->pm.gui_idle, - msecs_to_jiffies(RADEON_WAIT_IDLE_TIMEOUT)); - rdev->irq.gui_idle = false; - radeon_irq_set(rdev); + /* wait for GPU to become idle */ + radeon_irq_kms_wait_gui_idle(rdev); } } else { struct radeon_ring *ring = &rdev->ring[RADEON_RING_TYPE_GFX_INDEX]; |