radeon/evergreen: add support for short HPD irqs

This adds support for processing short irqs, and triggering
the dp_work.

Signed-off-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

1 files changed, 89 insertions, 12 deletions

diff --git a/drivers/gpu/drm/radeon/evergreen.c b/drivers/gpu/drm/radeon/evergreen.c
index 21cbd2e90f3b..f848acfd3fc8 100644
--- a/drivers/gpu/drm/radeon/evergreen.c
+++ b/drivers/gpu/drm/radeon/evergreen.c
@@ -4420,12 +4420,12 @@ int evergreen_irq_set(struct radeon_device *rdev)
                 return 0;
         }
 
-        hpd1 = RREG32(DC_HPD1_INT_CONTROL) & ~DC_HPDx_INT_EN;
-        hpd2 = RREG32(DC_HPD2_INT_CONTROL) & ~DC_HPDx_INT_EN;
-        hpd3 = RREG32(DC_HPD3_INT_CONTROL) & ~DC_HPDx_INT_EN;
-        hpd4 = RREG32(DC_HPD4_INT_CONTROL) & ~DC_HPDx_INT_EN;
-        hpd5 = RREG32(DC_HPD5_INT_CONTROL) & ~DC_HPDx_INT_EN;
-        hpd6 = RREG32(DC_HPD6_INT_CONTROL) & ~DC_HPDx_INT_EN;
+        hpd1 = RREG32(DC_HPD1_INT_CONTROL) & ~(DC_HPDx_INT_EN | DC_HPDx_RX_INT_EN);
+        hpd2 = RREG32(DC_HPD2_INT_CONTROL) & ~(DC_HPDx_INT_EN | DC_HPDx_RX_INT_EN);
+        hpd3 = RREG32(DC_HPD3_INT_CONTROL) & ~(DC_HPDx_INT_EN | DC_HPDx_RX_INT_EN);
+        hpd4 = RREG32(DC_HPD4_INT_CONTROL) & ~(DC_HPDx_INT_EN | DC_HPDx_RX_INT_EN);
+        hpd5 = RREG32(DC_HPD5_INT_CONTROL) & ~(DC_HPDx_INT_EN | DC_HPDx_RX_INT_EN);
+        hpd6 = RREG32(DC_HPD6_INT_CONTROL) & ~(DC_HPDx_INT_EN | DC_HPDx_RX_INT_EN);
         if (rdev->family == CHIP_ARUBA)
                 thermal_int = RREG32(TN_CG_THERMAL_INT_CTRL) &
                         ~(THERM_INT_MASK_HIGH | THERM_INT_MASK_LOW);
@@ -4514,27 +4514,27 @@ int evergreen_irq_set(struct radeon_device *rdev)
         }
         if (rdev->irq.hpd[0]) {
                 DRM_DEBUG("evergreen_irq_set: hpd 1\n");
-                hpd1 |= DC_HPDx_INT_EN;
+                hpd1 |= DC_HPDx_INT_EN | DC_HPDx_RX_INT_EN;
         }
         if (rdev->irq.hpd[1]) {
                 DRM_DEBUG("evergreen_irq_set: hpd 2\n");
-                hpd2 |= DC_HPDx_INT_EN;
+                hpd2 |= DC_HPDx_INT_EN | DC_HPDx_RX_INT_EN;
         }
         if (rdev->irq.hpd[2]) {
                 DRM_DEBUG("evergreen_irq_set: hpd 3\n");
-                hpd3 |= DC_HPDx_INT_EN;
+                hpd3 |= DC_HPDx_INT_EN | DC_HPDx_RX_INT_EN;
         }
         if (rdev->irq.hpd[3]) {
                 DRM_DEBUG("evergreen_irq_set: hpd 4\n");
-                hpd4 |= DC_HPDx_INT_EN;
+                hpd4 |= DC_HPDx_INT_EN | DC_HPDx_RX_INT_EN;
         }
         if (rdev->irq.hpd[4]) {
                 DRM_DEBUG("evergreen_irq_set: hpd 5\n");
-                hpd5 |= DC_HPDx_INT_EN;
+                hpd5 |= DC_HPDx_INT_EN | DC_HPDx_RX_INT_EN;
         }
         if (rdev->irq.hpd[5]) {
                 DRM_DEBUG("evergreen_irq_set: hpd 6\n");
-                hpd6 |= DC_HPDx_INT_EN;
+                hpd6 |= DC_HPDx_INT_EN | DC_HPDx_RX_INT_EN;
         }
         if (rdev->irq.afmt[0]) {
                 DRM_DEBUG("evergreen_irq_set: hdmi 0\n");
@@ -4728,6 +4728,38 @@ static void evergreen_irq_ack(struct radeon_device *rdev)
                 tmp |= DC_HPDx_INT_ACK;
                 WREG32(DC_HPD6_INT_CONTROL, tmp);
         }
+
+        if (rdev->irq.stat_regs.evergreen.disp_int & DC_HPD1_RX_INTERRUPT) {
+                tmp = RREG32(DC_HPD1_INT_CONTROL);
+                tmp |= DC_HPDx_RX_INT_ACK;
+                WREG32(DC_HPD1_INT_CONTROL, tmp);
+        }
+        if (rdev->irq.stat_regs.evergreen.disp_int_cont & DC_HPD2_RX_INTERRUPT) {
+                tmp = RREG32(DC_HPD2_INT_CONTROL);
+                tmp |= DC_HPDx_RX_INT_ACK;
+                WREG32(DC_HPD2_INT_CONTROL, tmp);
+        }
+        if (rdev->irq.stat_regs.evergreen.disp_int_cont2 & DC_HPD3_RX_INTERRUPT) {
+                tmp = RREG32(DC_HPD3_INT_CONTROL);
+                tmp |= DC_HPDx_RX_INT_ACK;
+                WREG32(DC_HPD3_INT_CONTROL, tmp);
+        }
+        if (rdev->irq.stat_regs.evergreen.disp_int_cont3 & DC_HPD4_RX_INTERRUPT) {
+                tmp = RREG32(DC_HPD4_INT_CONTROL);
+                tmp |= DC_HPDx_RX_INT_ACK;
+                WREG32(DC_HPD4_INT_CONTROL, tmp);
+        }
+        if (rdev->irq.stat_regs.evergreen.disp_int_cont4 & DC_HPD5_RX_INTERRUPT) {
+                tmp = RREG32(DC_HPD5_INT_CONTROL);
+                tmp |= DC_HPDx_RX_INT_ACK;
+                WREG32(DC_HPD5_INT_CONTROL, tmp);
+        }
+        if (rdev->irq.stat_regs.evergreen.disp_int_cont5 & DC_HPD6_RX_INTERRUPT) {
+                tmp = RREG32(DC_HPD5_INT_CONTROL);
+                tmp |= DC_HPDx_RX_INT_ACK;
+                WREG32(DC_HPD6_INT_CONTROL, tmp);
+        }
+
         if (rdev->irq.stat_regs.evergreen.afmt_status1 & AFMT_AZ_FORMAT_WTRIG) {
                 tmp = RREG32(AFMT_AUDIO_PACKET_CONTROL + EVERGREEN_CRTC0_REGISTER_OFFSET);
                 tmp |= AFMT_AZ_FORMAT_WTRIG_ACK;
@@ -4808,6 +4840,7 @@ int evergreen_irq_process(struct radeon_device *rdev)
         u32 ring_index;
         bool queue_hotplug = false;
         bool queue_hdmi = false;
+        bool queue_dp = false;
         bool queue_thermal = false;
         u32 status, addr;
 
@@ -5047,6 +5080,48 @@ restart_ih:
                                         DRM_DEBUG("IH: HPD6\n");
                                 }
                                 break;
+                        case 6:
+                                if (rdev->irq.stat_regs.evergreen.disp_int & DC_HPD1_RX_INTERRUPT) {
+                                        rdev->irq.stat_regs.evergreen.disp_int &= ~DC_HPD1_RX_INTERRUPT;
+                                        queue_dp = true;
+                                        DRM_DEBUG("IH: HPD_RX 1\n");
+                                }
+                                break;
+                        case 7:
+                                if (rdev->irq.stat_regs.evergreen.disp_int_cont & DC_HPD2_RX_INTERRUPT) {
+                                        rdev->irq.stat_regs.evergreen.disp_int_cont &= ~DC_HPD2_RX_INTERRUPT;
+                                        queue_dp = true;
+                                        DRM_DEBUG("IH: HPD_RX 2\n");
+                                }
+                                break;
+                        case 8:
+                                if (rdev->irq.stat_regs.evergreen.disp_int_cont2 & DC_HPD3_RX_INTERRUPT) {
+                                        rdev->irq.stat_regs.evergreen.disp_int_cont2 &= ~DC_HPD3_RX_INTERRUPT;
+                                        queue_dp = true;
+                                        DRM_DEBUG("IH: HPD_RX 3\n");
+                                }
+                                break;
+                        case 9:
+                                if (rdev->irq.stat_regs.evergreen.disp_int_cont3 & DC_HPD4_RX_INTERRUPT) {
+                                        rdev->irq.stat_regs.evergreen.disp_int_cont3 &= ~DC_HPD4_RX_INTERRUPT;
+                                        queue_dp = true;
+                                        DRM_DEBUG("IH: HPD_RX 4\n");
+                                }
+                                break;
+                        case 10:
+                                if (rdev->irq.stat_regs.evergreen.disp_int_cont4 & DC_HPD5_RX_INTERRUPT) {
+                                        rdev->irq.stat_regs.evergreen.disp_int_cont4 &= ~DC_HPD5_RX_INTERRUPT;
+                                        queue_dp = true;
+                                        DRM_DEBUG("IH: HPD_RX 5\n");
+                                }
+                                break;
+                        case 11:
+                                if (rdev->irq.stat_regs.evergreen.disp_int_cont5 & DC_HPD6_RX_INTERRUPT) {
+                                        rdev->irq.stat_regs.evergreen.disp_int_cont5 &= ~DC_HPD6_RX_INTERRUPT;
+                                        queue_dp = true;
+                                        DRM_DEBUG("IH: HPD_RX 6\n");
+                                }
+                                break;
                         default:
                                 DRM_DEBUG("Unhandled interrupt: %d %d\n", src_id, src_data);
                                 break;
@@ -5179,6 +5254,8 @@ restart_ih:
                 rptr &= rdev->ih.ptr_mask;
                 WREG32(IH_RB_RPTR, rptr);
         }
+        if (queue_dp)
+                schedule_work(&rdev->dp_work);
         if (queue_hotplug)
                 schedule_work(&rdev->hotplug_work);
         if (queue_hdmi)