Signed-off-by: Rafał Miłecki <zajec5@xxxxxxxxx>
---
V2: fix typo and add extra \n
---
drivers/gpu/drm/radeon/evergreen_hdmi.c | 14 ++++++++++++++
drivers/gpu/drm/radeon/radeon_display.c | 6 ++++++
2 files changed, 20 insertions(+)
diff --git a/drivers/gpu/drm/radeon/evergreen_hdmi.c b/drivers/gpu/drm/radeon/evergreen_hdmi.c
index 4fdecc2..8b64bf1 100644
--- a/drivers/gpu/drm/radeon/evergreen_hdmi.c
+++ b/drivers/gpu/drm/radeon/evergreen_hdmi.c
@@ -143,6 +143,13 @@ void evergreen_hdmi_setmode(struct drm_encoder *encoder, struct drm_display_mode
WREG32(HDMI_GC + offset, 0); /* unset HDMI_GC_AVMUTE */
+ /*
+ * At this point fglrx reads following regs:
+ * DCE41: 0x49c
+ * DCE5: 0x480 0x484 0x488
+ * Is that something audio related?
+ */
+
err = drm_hdmi_avi_infoframe_from_display_mode(&frame, mode);
if (err < 0) {
DRM_ERROR("failed to setup AVI infoframe: %zd\n", err);
@@ -158,6 +165,13 @@ void evergreen_hdmi_setmode(struct drm_encoder *encoder, struct drm_display_mode
evergreen_hdmi_update_avi_infoframe(encoder, buffer, sizeof(buffer));
evergreen_hdmi_update_ACR(encoder, mode->clock);
+ /*
+ * At this point fglrx changes following regs:
+ * DCE41: 0x7a70
+ * DCE5: 0x7a70 and 0x64ec
+ * Is that something audio related?
+ */
+
/* it's unknown what these bits do excatly, but it's indeed quite useful for debugging */
WREG32(AFMT_RAMP_CONTROL0 + offset, 0x00FFFFFF);
WREG32(AFMT_RAMP_CONTROL1 + offset, 0x007FFFFF);
diff --git a/drivers/gpu/drm/radeon/radeon_display.c b/drivers/gpu/drm/radeon/radeon_display.c
index e38fd55..376c4e4 100644
--- a/drivers/gpu/drm/radeon/radeon_display.c
+++ b/drivers/gpu/drm/radeon/radeon_display.c
@@ -1261,6 +1261,12 @@ static void radeon_afmt_init(struct radeon_device *rdev)
rdev->mode_info.afmt[1]->offset = EVERGREEN_CRTC1_REGISTER_OFFSET;
rdev->mode_info.afmt[1]->id = 1;
}
+
+ /*
+ * According to the comments above we should use !DCE41 || DCE5
+ * condition, however there isn't any DCE5 that is DCE41, so
+ * DCE5 check is not needed.
+ */
if (!ASIC_IS_DCE41(rdev)) {
rdev->mode_info.afmt[2] = kzalloc(sizeof(struct radeon_afmt), GFP_KERNEL);
if (rdev->mode_info.afmt[2]) {
--
1.7.10.4
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