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>
diff --git a/drivers/gpu/drm/radeon/evergreen.c b/drivers/gpu/drm/radeon/evergreen.c
index 765bd1f..bdc1f30 100644
--- a/drivers/gpu/drm/radeon/evergreen.c
+++ b/drivers/gpu/drm/radeon/evergreen.c
@@ -428,6 +428,7 @@
{
struct drm_device *dev = rdev->ddev;
struct drm_connector *connector;
+ unsigned enabled = 0;
u32 tmp = DC_HPDx_CONNECTION_TIMER(0x9c4) |
DC_HPDx_RX_INT_TIMER(0xfa) | DC_HPDx_EN;
@@ -436,73 +437,64 @@
switch (radeon_connector->hpd.hpd) {
case RADEON_HPD_1:
WREG32(DC_HPD1_CONTROL, tmp);
- rdev->irq.hpd[0] = true;
break;
case RADEON_HPD_2:
WREG32(DC_HPD2_CONTROL, tmp);
- rdev->irq.hpd[1] = true;
break;
case RADEON_HPD_3:
WREG32(DC_HPD3_CONTROL, tmp);
- rdev->irq.hpd[2] = true;
break;
case RADEON_HPD_4:
WREG32(DC_HPD4_CONTROL, tmp);
- rdev->irq.hpd[3] = true;
break;
case RADEON_HPD_5:
WREG32(DC_HPD5_CONTROL, tmp);
- rdev->irq.hpd[4] = true;
break;
case RADEON_HPD_6:
WREG32(DC_HPD6_CONTROL, tmp);
- rdev->irq.hpd[5] = true;
break;
default:
break;
}
radeon_hpd_set_polarity(rdev, radeon_connector->hpd.hpd);
+ enabled |= 1 << radeon_connector->hpd.hpd;
}
- if (rdev->irq.installed)
- evergreen_irq_set(rdev);
+ radeon_irq_kms_enable_hpd(rdev, enabled);
}
void evergreen_hpd_fini(struct radeon_device *rdev)
{
struct drm_device *dev = rdev->ddev;
struct drm_connector *connector;
+ unsigned disabled = 0;
list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
struct radeon_connector *radeon_connector = to_radeon_connector(connector);
switch (radeon_connector->hpd.hpd) {
case RADEON_HPD_1:
WREG32(DC_HPD1_CONTROL, 0);
- rdev->irq.hpd[0] = false;
break;
case RADEON_HPD_2:
WREG32(DC_HPD2_CONTROL, 0);
- rdev->irq.hpd[1] = false;
break;
case RADEON_HPD_3:
WREG32(DC_HPD3_CONTROL, 0);
- rdev->irq.hpd[2] = false;
break;
case RADEON_HPD_4:
WREG32(DC_HPD4_CONTROL, 0);
- rdev->irq.hpd[3] = false;
break;
case RADEON_HPD_5:
WREG32(DC_HPD5_CONTROL, 0);
- rdev->irq.hpd[4] = false;
break;
case RADEON_HPD_6:
WREG32(DC_HPD6_CONTROL, 0);
- rdev->irq.hpd[5] = false;
break;
default:
break;
}
+ disabled |= 1 << radeon_connector->hpd.hpd;
}
+ radeon_irq_kms_disable_hpd(rdev, disabled);
}
/* watermark setup */
@@ -2984,7 +2976,6 @@
break;
case 233: /* GUI IDLE */
DRM_DEBUG("IH: GUI idle\n");
- rdev->pm.gui_idle = true;
wake_up(&rdev->irq.idle_queue);
break;
default: