drm/radeon/dce4+: don't use radeon_crtc for vblank callback

This might be called before we've allocated the radeon_crtcs

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

1 files changed, 16 insertions, 4 deletions

diff --git a/drivers/gpu/drm/radeon/evergreen.c b/drivers/gpu/drm/radeon/evergreen.c
index e93b80a6d4e9..0c79d9eb2ce4 100644
--- a/drivers/gpu/drm/radeon/evergreen.c
+++ b/drivers/gpu/drm/radeon/evergreen.c
@@ -37,6 +37,16 @@
 #define EVERGREEN_PFP_UCODE_SIZE 1120
 #define EVERGREEN_PM4_UCODE_SIZE 1376
 
+static const u32 crtc_offsets[6] =
+{
+        EVERGREEN_CRTC0_REGISTER_OFFSET,
+        EVERGREEN_CRTC1_REGISTER_OFFSET,
+        EVERGREEN_CRTC2_REGISTER_OFFSET,
+        EVERGREEN_CRTC3_REGISTER_OFFSET,
+        EVERGREEN_CRTC4_REGISTER_OFFSET,
+        EVERGREEN_CRTC5_REGISTER_OFFSET
+};
+
 static void evergreen_gpu_init(struct radeon_device *rdev);
 void evergreen_fini(struct radeon_device *rdev);
 void evergreen_pcie_gen2_enable(struct radeon_device *rdev);
@@ -109,17 +119,19 @@ void evergreen_fix_pci_max_read_req_size(struct radeon_device *rdev)
  */
 void dce4_wait_for_vblank(struct radeon_device *rdev, int crtc)
 {
-        struct radeon_crtc *radeon_crtc = rdev->mode_info.crtcs[crtc];
         int i;
 
-        if (RREG32(EVERGREEN_CRTC_CONTROL + radeon_crtc->crtc_offset) & EVERGREEN_CRTC_MASTER_EN) {
+        if (crtc >= rdev->num_crtc)
+                return;
+
+        if (RREG32(EVERGREEN_CRTC_CONTROL + crtc_offsets[crtc]) & EVERGREEN_CRTC_MASTER_EN) {
                 for (i = 0; i < rdev->usec_timeout; i++) {
-                        if (!(RREG32(EVERGREEN_CRTC_STATUS + radeon_crtc->crtc_offset) & EVERGREEN_CRTC_V_BLANK))
+                        if (!(RREG32(EVERGREEN_CRTC_STATUS + crtc_offsets[crtc]) & EVERGREEN_CRTC_V_BLANK))
                                 break;
                         udelay(1);
                 }
                 for (i = 0; i < rdev->usec_timeout; i++) {
-                        if (RREG32(EVERGREEN_CRTC_STATUS + radeon_crtc->crtc_offset) & EVERGREEN_CRTC_V_BLANK)
+                        if (RREG32(EVERGREEN_CRTC_STATUS + crtc_offsets[crtc]) & EVERGREEN_CRTC_V_BLANK)
                                 break;
                         udelay(1);
                 }