[PATCH] drm/radeon: don't mess with hot plug detect for eDP or LVDS connector v2

[j.glisse at gmail.com]

From: Jerome Glisse <jglisse at redhat.com>

It seems imac pannel doesn't like whe we change the hot plug setup
and then refuse to work. This help but doesn't fully fix:
https://bugzilla.redhat.com/show_bug.cgi?id=726143

v2: fix typo and improve commit message

Signed-off-by: Matthew Garrett <mjg at redhat.com>
Signed-off-by: Jerome Glisse <jglisse at redhat.com>
---
 drivers/gpu/drm/radeon/r600.c |    8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/gpu/drm/radeon/r600.c b/drivers/gpu/drm/radeon/r600.c
index 694b6b2..a304c9d 100644
--- a/drivers/gpu/drm/radeon/r600.c
+++ b/drivers/gpu/drm/radeon/r600.c
@@ -713,6 +713,14 @@ void r600_hpd_init(struct radeon_device *rdev)
 	list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
 		struct radeon_connector *radeon_connector = to_radeon_connector(connector);
 
+		if (connector->connector_type == DRM_MODE_CONNECTOR_eDP ||
+		    connector->connector_type == DRM_MODE_CONNECTOR_LVDS) {
+			/* don't try to enable hpd on eDP or LVDS avoid breaking the
+			 * aux dp channel on imac and help (but not completely fix)
+			 * https://bugzilla.redhat.com/show_bug.cgi?id=726143
+			 */
+			continue;
+		}
 		if (ASIC_IS_DCE3(rdev)) {
 			u32 tmp = DC_HPDx_CONNECTION_TIMER(0x9c4) | DC_HPDx_RX_INT_TIMER(0xfa);
 			if (ASIC_IS_DCE32(rdev))
-- 
1.7.9.3