drm/radeon: use pflip irq on R600+ v2

Testing the update pending bit directly after issuing an
update is nonsense cause depending on the pixel clock the
CRTC needs a bit of time to execute the flip even when we
are in the VBLANK period.

This is just a non invasive patch to solve the problem at
hand, a more complete and cleaner solution should follow
in the next merge window.

Fixes: https://bugs.freedesktop.org/show_bug.cgi?id=76564
v2: fix source IDs for CRTC2-6

Signed-off-by: Christian König <christian.koenig@amd.com>
Cc: stable@vger.kernel.org

diff --git a/drivers/gpu/drm/radeon/cik.c b/drivers/gpu/drm/radeon/cik.c
index 199eb194716f83b64aa7c3850d30606f4ba3f053..421c6084cbfc81cae822da54a55a6c078232142b 100644 (file)
--- a/drivers/gpu/drm/radeon/cik.c
+++ b/drivers/gpu/drm/radeon/cik.c
@@ -6693,6 +6693,19 @@ static void cik_disable_interrupt_state(struct radeon_device *rdev)
                WREG32(LB_INTERRUPT_MASK + EVERGREEN_CRTC4_REGISTER_OFFSET, 0);
                WREG32(LB_INTERRUPT_MASK + EVERGREEN_CRTC5_REGISTER_OFFSET, 0);
        }
+       /* pflip */
+       if (rdev->num_crtc >= 2) {
+               WREG32(GRPH_INT_CONTROL + EVERGREEN_CRTC0_REGISTER_OFFSET, 0);
+               WREG32(GRPH_INT_CONTROL + EVERGREEN_CRTC1_REGISTER_OFFSET, 0);
+       }
+       if (rdev->num_crtc >= 4) {
+               WREG32(GRPH_INT_CONTROL + EVERGREEN_CRTC2_REGISTER_OFFSET, 0);
+               WREG32(GRPH_INT_CONTROL + EVERGREEN_CRTC3_REGISTER_OFFSET, 0);
+       }
+       if (rdev->num_crtc >= 6) {
+               WREG32(GRPH_INT_CONTROL + EVERGREEN_CRTC4_REGISTER_OFFSET, 0);
+               WREG32(GRPH_INT_CONTROL + EVERGREEN_CRTC5_REGISTER_OFFSET, 0);
+       }
 
        /* dac hotplug */
        WREG32(DAC_AUTODETECT_INT_CONTROL, 0);
@@ -7049,6 +7062,25 @@ int cik_irq_set(struct radeon_device *rdev)
                WREG32(LB_INTERRUPT_MASK + EVERGREEN_CRTC5_REGISTER_OFFSET, crtc6);
        }
 
+       if (rdev->num_crtc >= 2) {
+               WREG32(GRPH_INT_CONTROL + EVERGREEN_CRTC0_REGISTER_OFFSET,
+                      GRPH_PFLIP_INT_MASK);
+               WREG32(GRPH_INT_CONTROL + EVERGREEN_CRTC1_REGISTER_OFFSET,
+                      GRPH_PFLIP_INT_MASK);
+       }
+       if (rdev->num_crtc >= 4) {
+               WREG32(GRPH_INT_CONTROL + EVERGREEN_CRTC2_REGISTER_OFFSET,
+                      GRPH_PFLIP_INT_MASK);
+               WREG32(GRPH_INT_CONTROL + EVERGREEN_CRTC3_REGISTER_OFFSET,
+                      GRPH_PFLIP_INT_MASK);
+       }
+       if (rdev->num_crtc >= 6) {
+               WREG32(GRPH_INT_CONTROL + EVERGREEN_CRTC4_REGISTER_OFFSET,
+                      GRPH_PFLIP_INT_MASK);
+               WREG32(GRPH_INT_CONTROL + EVERGREEN_CRTC5_REGISTER_OFFSET,
+                      GRPH_PFLIP_INT_MASK);
+       }
+
        WREG32(DC_HPD1_INT_CONTROL, hpd1);
        WREG32(DC_HPD2_INT_CONTROL, hpd2);
        WREG32(DC_HPD3_INT_CONTROL, hpd3);
@@ -7085,6 +7117,29 @@ static inline void cik_irq_ack(struct radeon_device *rdev)
        rdev->irq.stat_regs.cik.disp_int_cont5 = RREG32(DISP_INTERRUPT_STATUS_CONTINUE5);
        rdev->irq.stat_regs.cik.disp_int_cont6 = RREG32(DISP_INTERRUPT_STATUS_CONTINUE6);
 
+       rdev->irq.stat_regs.cik.d1grph_int = RREG32(GRPH_INT_STATUS +
+               EVERGREEN_CRTC0_REGISTER_OFFSET);
+       rdev->irq.stat_regs.cik.d2grph_int = RREG32(GRPH_INT_STATUS +
+               EVERGREEN_CRTC1_REGISTER_OFFSET);
+       if (rdev->num_crtc >= 4) {
+               rdev->irq.stat_regs.cik.d3grph_int = RREG32(GRPH_INT_STATUS +
+                       EVERGREEN_CRTC2_REGISTER_OFFSET);
+               rdev->irq.stat_regs.cik.d4grph_int = RREG32(GRPH_INT_STATUS +
+                       EVERGREEN_CRTC3_REGISTER_OFFSET);
+       }
+       if (rdev->num_crtc >= 6) {
+               rdev->irq.stat_regs.cik.d5grph_int = RREG32(GRPH_INT_STATUS +
+                       EVERGREEN_CRTC4_REGISTER_OFFSET);
+               rdev->irq.stat_regs.cik.d6grph_int = RREG32(GRPH_INT_STATUS +
+                       EVERGREEN_CRTC5_REGISTER_OFFSET);
+       }
+
+       if (rdev->irq.stat_regs.cik.d1grph_int & GRPH_PFLIP_INT_OCCURRED)
+               WREG32(GRPH_INT_STATUS + EVERGREEN_CRTC0_REGISTER_OFFSET,
+                      GRPH_PFLIP_INT_CLEAR);
+       if (rdev->irq.stat_regs.cik.d2grph_int & GRPH_PFLIP_INT_OCCURRED)
+               WREG32(GRPH_INT_STATUS + EVERGREEN_CRTC1_REGISTER_OFFSET,
+                      GRPH_PFLIP_INT_CLEAR);
        if (rdev->irq.stat_regs.cik.disp_int & LB_D1_VBLANK_INTERRUPT)
                WREG32(LB_VBLANK_STATUS + EVERGREEN_CRTC0_REGISTER_OFFSET, VBLANK_ACK);
        if (rdev->irq.stat_regs.cik.disp_int & LB_D1_VLINE_INTERRUPT)
@@ -7095,6 +7150,12 @@ static inline void cik_irq_ack(struct radeon_device *rdev)
                WREG32(LB_VLINE_STATUS + EVERGREEN_CRTC1_REGISTER_OFFSET, VLINE_ACK);
 
        if (rdev->num_crtc >= 4) {
+               if (rdev->irq.stat_regs.cik.d3grph_int & GRPH_PFLIP_INT_OCCURRED)
+                       WREG32(GRPH_INT_STATUS + EVERGREEN_CRTC2_REGISTER_OFFSET,
+                              GRPH_PFLIP_INT_CLEAR);
+               if (rdev->irq.stat_regs.cik.d4grph_int & GRPH_PFLIP_INT_OCCURRED)
+                       WREG32(GRPH_INT_STATUS + EVERGREEN_CRTC3_REGISTER_OFFSET,
+                              GRPH_PFLIP_INT_CLEAR);
                if (rdev->irq.stat_regs.cik.disp_int_cont2 & LB_D3_VBLANK_INTERRUPT)
                        WREG32(LB_VBLANK_STATUS + EVERGREEN_CRTC2_REGISTER_OFFSET, VBLANK_ACK);
                if (rdev->irq.stat_regs.cik.disp_int_cont2 & LB_D3_VLINE_INTERRUPT)
@@ -7106,6 +7167,12 @@ static inline void cik_irq_ack(struct radeon_device *rdev)
        }
 
        if (rdev->num_crtc >= 6) {
+               if (rdev->irq.stat_regs.cik.d5grph_int & GRPH_PFLIP_INT_OCCURRED)
+                       WREG32(GRPH_INT_STATUS + EVERGREEN_CRTC4_REGISTER_OFFSET,
+                              GRPH_PFLIP_INT_CLEAR);
+               if (rdev->irq.stat_regs.cik.d6grph_int & GRPH_PFLIP_INT_OCCURRED)
+                       WREG32(GRPH_INT_STATUS + EVERGREEN_CRTC5_REGISTER_OFFSET,
+                              GRPH_PFLIP_INT_CLEAR);
                if (rdev->irq.stat_regs.cik.disp_int_cont4 & LB_D5_VBLANK_INTERRUPT)
                        WREG32(LB_VBLANK_STATUS + EVERGREEN_CRTC4_REGISTER_OFFSET, VBLANK_ACK);
                if (rdev->irq.stat_regs.cik.disp_int_cont4 & LB_D5_VLINE_INTERRUPT)
@@ -7457,6 +7524,15 @@ restart_ih:
                                break;
                        }
                        break;
+               case 8: /* D1 page flip */
+               case 10: /* D2 page flip */
+               case 12: /* D3 page flip */
+               case 14: /* D4 page flip */
+               case 16: /* D5 page flip */
+               case 18: /* D6 page flip */
+                       DRM_DEBUG("IH: D%d flip\n", ((src_id - 8) >> 1) + 1);
+                       radeon_crtc_handle_flip(rdev, (src_id - 8) >> 1);
+                       break;
                case 42: /* HPD hotplug */
                        switch (src_data) {
                        case 0:

diff --git a/drivers/gpu/drm/radeon/cikd.h b/drivers/gpu/drm/radeon/cikd.h
index 213873270d5f6b705974aa57867f0dff47b7901a..dd7926394a8fdaf6821fdd10151f98639c7c082f 100644 (file)
--- a/drivers/gpu/drm/radeon/cikd.h
+++ b/drivers/gpu/drm/radeon/cikd.h
@@ -888,6 +888,15 @@
 #       define DC_HPD6_RX_INTERRUPT                     (1 << 18)
 #define DISP_INTERRUPT_STATUS_CONTINUE6                 0x6780
 
+/* 0x6858, 0x7458, 0x10058, 0x10c58, 0x11858, 0x12458 */
+#define GRPH_INT_STATUS                                 0x6858
+#       define GRPH_PFLIP_INT_OCCURRED                  (1 << 0)
+#       define GRPH_PFLIP_INT_CLEAR                     (1 << 8)
+/* 0x685c, 0x745c, 0x1005c, 0x10c5c, 0x1185c, 0x1245c */
+#define GRPH_INT_CONTROL                                0x685c
+#       define GRPH_PFLIP_INT_MASK                      (1 << 0)
+#       define GRPH_PFLIP_INT_TYPE                      (1 << 8)
+
 #define        DAC_AUTODETECT_INT_CONTROL                      0x67c8
 
 #define DC_HPD1_INT_STATUS                              0x601c

diff --cc drivers/gpu/drm/radeon/evergreen.c
Simple merge

diff --cc drivers/gpu/drm/radeon/r600.c
Simple merge

diff --cc drivers/gpu/drm/radeon/radeon.h
Simple merge

diff --cc drivers/gpu/drm/radeon/radeon_display.c
Simple merge

diff --cc drivers/gpu/drm/radeon/si.c
Simple merge