drm/radeon: Workaround radeon driver bug for Loongson

Radeon driver can not handle the interrupt is faster than DMA data, so irq handler must update an old ih.rptr value in IH_RB_RPTR register to enable interrupt again when interrupt is faster than DMA data. Signed-off-by: Huacai Chen <[email protected]> Signed-off-by: Zhijie Zhang <[email protected]> Signed-off-by: Yanteng Si <[email protected]>
deepin-community · May 31, 2024 · ef0556e · ef0556e
1 parent 74727dd
commit ef0556e
Show file tree

Hide file tree

Showing 4 changed files with 12 additions and 0 deletions.
diff --git a/drivers/gpu/drm/radeon/cik.c b/drivers/gpu/drm/radeon/cik.c
@@ -8093,6 +8093,9 @@ int cik_irq_process(struct radeon_device *rdev)
 	if (queue_thermal)
 		schedule_work(&rdev->pm.dpm.thermal.work);
 	rdev->ih.rptr = rptr;
+#ifdef CONFIG_LOONGARCH
+	WREG32(IH_RB_RPTR, rptr);
+#endif
 	atomic_set(&rdev->ih.lock, 0);
 
 	/* make sure wptr hasn't changed while processing */

diff --git a/drivers/gpu/drm/radeon/evergreen.c b/drivers/gpu/drm/radeon/evergreen.c
@@ -4922,6 +4922,9 @@ int evergreen_irq_process(struct radeon_device *rdev)
 	if (queue_thermal && rdev->pm.dpm_enabled)
 		schedule_work(&rdev->pm.dpm.thermal.work);
 	rdev->ih.rptr = rptr;
+#ifdef CONFIG_LOONGARCH
+	WREG32(IH_RB_RPTR, rptr);
+#endif
 	atomic_set(&rdev->ih.lock, 0);
 
 	/* make sure wptr hasn't changed while processing */

diff --git a/drivers/gpu/drm/radeon/r600.c b/drivers/gpu/drm/radeon/r600.c
@@ -4328,6 +4328,9 @@ int r600_irq_process(struct radeon_device *rdev)
 	if (queue_thermal && rdev->pm.dpm_enabled)
 		schedule_work(&rdev->pm.dpm.thermal.work);
 	rdev->ih.rptr = rptr;
+#ifdef CONFIG_LOONGARCH
+	WREG32(IH_RB_RPTR, rptr);
+#endif
 	atomic_set(&rdev->ih.lock, 0);
 
 	/* make sure wptr hasn't changed while processing */

diff --git a/drivers/gpu/drm/radeon/si.c b/drivers/gpu/drm/radeon/si.c
@@ -6442,6 +6442,9 @@ int si_irq_process(struct radeon_device *rdev)
 	if (queue_thermal && rdev->pm.dpm_enabled)
 		schedule_work(&rdev->pm.dpm.thermal.work);
 	rdev->ih.rptr = rptr;
+#ifdef CONFIG_LOONGARCH
+	WREG32(IH_RB_RPTR, rptr);
+#endif
 	atomic_set(&rdev->ih.lock, 0);
 
 	/* make sure wptr hasn't changed while processing */