drm/radeon/kms: add hpd support for r1xx-r4xx asics
This just adds the functionality, it's not hooked up
yet.
Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
diff --git a/drivers/gpu/drm/radeon/r100.c b/drivers/gpu/drm/radeon/r100.c
index 1090968..2b534c5 100644
--- a/drivers/gpu/drm/radeon/r100.c
+++ b/drivers/gpu/drm/radeon/r100.c
@@ -65,6 +65,95 @@
* r100,rv100,rs100,rv200,rs200,r200,rv250,rs300,rv280
*/
+/* hpd for digital panel detect/disconnect */
+bool r100_hpd_sense(struct radeon_device *rdev, enum radeon_hpd_id hpd)
+{
+ bool connected = false;
+
+ switch (hpd) {
+ case RADEON_HPD_1:
+ if (RREG32(RADEON_FP_GEN_CNTL) & RADEON_FP_DETECT_SENSE)
+ connected = true;
+ break;
+ case RADEON_HPD_2:
+ if (RREG32(RADEON_FP2_GEN_CNTL) & RADEON_FP2_DETECT_SENSE)
+ connected = true;
+ break;
+ default:
+ break;
+ }
+ return connected;
+}
+
+void r100_hpd_set_polarity(struct radeon_device *rdev,
+ enum radeon_hpd_id hpd)
+{
+ u32 tmp;
+ bool connected = r100_hpd_sense(rdev, hpd);
+
+ switch (hpd) {
+ case RADEON_HPD_1:
+ tmp = RREG32(RADEON_FP_GEN_CNTL);
+ if (connected)
+ tmp &= ~RADEON_FP_DETECT_INT_POL;
+ else
+ tmp |= RADEON_FP_DETECT_INT_POL;
+ WREG32(RADEON_FP_GEN_CNTL, tmp);
+ break;
+ case RADEON_HPD_2:
+ tmp = RREG32(RADEON_FP2_GEN_CNTL);
+ if (connected)
+ tmp &= ~RADEON_FP2_DETECT_INT_POL;
+ else
+ tmp |= RADEON_FP2_DETECT_INT_POL;
+ WREG32(RADEON_FP2_GEN_CNTL, tmp);
+ break;
+ default:
+ break;
+ }
+}
+
+void r100_hpd_init(struct radeon_device *rdev)
+{
+ struct drm_device *dev = rdev->ddev;
+ struct drm_connector *connector;
+
+ 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:
+ rdev->irq.hpd[0] = true;
+ break;
+ case RADEON_HPD_2:
+ rdev->irq.hpd[1] = true;
+ break;
+ default:
+ break;
+ }
+ }
+ r100_irq_set(rdev);
+}
+
+void r100_hpd_fini(struct radeon_device *rdev)
+{
+ struct drm_device *dev = rdev->ddev;
+ struct drm_connector *connector;
+
+ 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:
+ rdev->irq.hpd[0] = false;
+ break;
+ case RADEON_HPD_2:
+ rdev->irq.hpd[1] = false;
+ break;
+ default:
+ break;
+ }
+ }
+}
+
/*
* PCI GART
*/
@@ -163,6 +252,12 @@
if (rdev->irq.crtc_vblank_int[1]) {
tmp |= RADEON_CRTC2_VBLANK_MASK;
}
+ if (rdev->irq.hpd[0]) {
+ tmp |= RADEON_FP_DETECT_MASK;
+ }
+ if (rdev->irq.hpd[1]) {
+ tmp |= RADEON_FP2_DETECT_MASK;
+ }
WREG32(RADEON_GEN_INT_CNTL, tmp);
return 0;
}
@@ -181,8 +276,9 @@
static inline uint32_t r100_irq_ack(struct radeon_device *rdev)
{
uint32_t irqs = RREG32(RADEON_GEN_INT_STATUS);
- uint32_t irq_mask = RADEON_SW_INT_TEST | RADEON_CRTC_VBLANK_STAT |
- RADEON_CRTC2_VBLANK_STAT;
+ uint32_t irq_mask = RADEON_SW_INT_TEST |
+ RADEON_CRTC_VBLANK_STAT | RADEON_CRTC2_VBLANK_STAT |
+ RADEON_FP_DETECT_STAT | RADEON_FP2_DETECT_STAT;
if (irqs) {
WREG32(RADEON_GEN_INT_STATUS, irqs);
@@ -213,6 +309,12 @@
if (status & RADEON_CRTC2_VBLANK_STAT) {
drm_handle_vblank(rdev->ddev, 1);
}
+ if (status & RADEON_FP_DETECT_STAT) {
+ DRM_INFO("HPD1\n");
+ }
+ if (status & RADEON_FP2_DETECT_STAT) {
+ DRM_INFO("HPD2\n");
+ }
status = r100_irq_ack(rdev);
}
if (rdev->msi_enabled) {