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| author | Alex Deucher <alexander.deucher@amd.com> | 2013-04-11 12:45:34 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-05-11 13:54:06 -0700 |
| commit | 92f3345933a597abab9112d0127c29b9f4535b9a (patch) | |
| tree | 86db0a1aad76b34022dda9c0a30338b231940360 | |
| parent | 49b4bf2625c2cec64f1277436b36cc7cd546b174 (diff) | |
| download | linux-stable-92f3345933a597abab9112d0127c29b9f4535b9a.tar.gz linux-stable-92f3345933a597abab9112d0127c29b9f4535b9a.tar.bz2 linux-stable-92f3345933a597abab9112d0127c29b9f4535b9a.zip | |
drm/radeon/evergreen+: don't enable HPD interrupts on eDP/LVDS
commit 2e97be73e5f74a317232740ae82eb8f95326a660 upstream.
Avoids potential interrupt storms when the display is disabled.
May fix:
https://bugzilla.kernel.org/show_bug.cgi?id=56041
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/gpu/drm/radeon/evergreen.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/gpu/drm/radeon/evergreen.c b/drivers/gpu/drm/radeon/evergreen.c index 4078f25fad72..90dc47076620 100644 --- a/drivers/gpu/drm/radeon/evergreen.c +++ b/drivers/gpu/drm/radeon/evergreen.c @@ -636,6 +636,16 @@ void evergreen_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 + * also avoid interrupt storms during dpms. + */ + continue; + } switch (radeon_connector->hpd.hpd) { case RADEON_HPD_1: WREG32(DC_HPD1_CONTROL, tmp); |