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Subject[174/289] drm/radeon/kms/atom: set sane defaults in atombios_get_encoder_mode()
2.6.36-stable review patch.  If anyone has any objections, please let us know.

------------------

From: Alex Deucher <alexdeucher@gmail.com>

commit c7a71fc761551dc8be8543f14a90d08cda4e77f9 upstream.

If there was no connector mapped to the encoder, atombios_get_encoder_mode()
returned 0 which is the id for DP. Return something sane instead based on
the encoder id. This avoids hitting the DP paths on non-DP encoders.

Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

---
drivers/gpu/drm/radeon/radeon_encoders.c | 18 +++++++++++++++---
1 file changed, 15 insertions(+), 3 deletions(-)

--- a/drivers/gpu/drm/radeon/radeon_encoders.c
+++ b/drivers/gpu/drm/radeon/radeon_encoders.c
@@ -595,6 +595,7 @@ atombios_digital_setup(struct drm_encode
int
atombios_get_encoder_mode(struct drm_encoder *encoder)
{
+ struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
struct drm_device *dev = encoder->dev;
struct radeon_device *rdev = dev->dev_private;
struct drm_connector *connector;
@@ -602,9 +603,20 @@ atombios_get_encoder_mode(struct drm_enc
struct radeon_connector_atom_dig *dig_connector;

connector = radeon_get_connector_for_encoder(encoder);
- if (!connector)
- return 0;
-
+ if (!connector) {
+ switch (radeon_encoder->encoder_id) {
+ case ENCODER_OBJECT_ID_INTERNAL_UNIPHY:
+ case ENCODER_OBJECT_ID_INTERNAL_UNIPHY1:
+ case ENCODER_OBJECT_ID_INTERNAL_UNIPHY2:
+ case ENCODER_OBJECT_ID_INTERNAL_KLDSCP_LVTMA:
+ case ENCODER_OBJECT_ID_INTERNAL_KLDSCP_DVO1:
+ return ATOM_ENCODER_MODE_DVI;
+ case ENCODER_OBJECT_ID_INTERNAL_KLDSCP_DAC1:
+ case ENCODER_OBJECT_ID_INTERNAL_KLDSCP_DAC2:
+ default:
+ return ATOM_ENCODER_MODE_CRT;
+ }
+ }
radeon_connector = to_radeon_connector(connector);

switch (connector->connector_type) {



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