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authorDave Airlie <airlied@redhat.com>2015-06-04 09:23:51 +1000
committerDave Airlie <airlied@redhat.com>2015-06-04 09:23:51 +1000
commita8a50fce60e86f82e442bf84b8af20750b3d6105 (patch)
tree974c04f9f4f10275a8a9435113ea5b307d172bb6 /drivers/gpu/drm/radeon/atombios_dp.c
parent9b5edbf7a462b7c846e9d4675b9b72b7a4e84de9 (diff)
parentc65b99f046843d2455aa231747b5a07a999a9f3d (diff)
downloadop-kernel-dev-a8a50fce60e86f82e442bf84b8af20750b3d6105.zip
op-kernel-dev-a8a50fce60e86f82e442bf84b8af20750b3d6105.tar.gz
Merge tag 'v4.1-rc6' into drm-next
Linux 4.1-rc6 backmerge 4.1-rc6 as some of the later pull reqs are based on newer bases and I'd prefer to do the fixup myself.
Diffstat (limited to 'drivers/gpu/drm/radeon/atombios_dp.c')
-rw-r--r--drivers/gpu/drm/radeon/atombios_dp.c20
1 files changed, 11 insertions, 9 deletions
diff --git a/drivers/gpu/drm/radeon/atombios_dp.c b/drivers/gpu/drm/radeon/atombios_dp.c
index ed173d3..f81e0d7 100644
--- a/drivers/gpu/drm/radeon/atombios_dp.c
+++ b/drivers/gpu/drm/radeon/atombios_dp.c
@@ -421,19 +421,21 @@ bool radeon_dp_getdpcd(struct radeon_connector *radeon_connector)
{
struct radeon_connector_atom_dig *dig_connector = radeon_connector->con_priv;
u8 msg[DP_DPCD_SIZE];
- int ret;
+ int ret, i;
- ret = drm_dp_dpcd_read(&radeon_connector->ddc_bus->aux, DP_DPCD_REV, msg,
- DP_DPCD_SIZE);
- if (ret > 0) {
- memcpy(dig_connector->dpcd, msg, DP_DPCD_SIZE);
+ for (i = 0; i < 7; i++) {
+ ret = drm_dp_dpcd_read(&radeon_connector->ddc_bus->aux, DP_DPCD_REV, msg,
+ DP_DPCD_SIZE);
+ if (ret == DP_DPCD_SIZE) {
+ memcpy(dig_connector->dpcd, msg, DP_DPCD_SIZE);
- DRM_DEBUG_KMS("DPCD: %*ph\n", (int)sizeof(dig_connector->dpcd),
- dig_connector->dpcd);
+ DRM_DEBUG_KMS("DPCD: %*ph\n", (int)sizeof(dig_connector->dpcd),
+ dig_connector->dpcd);
- radeon_dp_probe_oui(radeon_connector);
+ radeon_dp_probe_oui(radeon_connector);
- return true;
+ return true;
+ }
}
dig_connector->dpcd[0] = 0;
return false;
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