diff options
| author | Dave Airlie <airlied@redhat.com> | 2015-02-20 09:21:36 +1000 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2015-03-19 12:26:44 -0400 |
| commit | 875711f0e217b00cba1a851eee01c4e33041a91c (patch) | |
| tree | 94b7f9745a466d224b3030f1a0b6a18f94c92d48 /drivers/gpu/drm/radeon/atombios_dp.c | |
| parent | fd99a0943ffaa0320ea4f69d09ed188f950c0432 (diff) | |
drm/radeon: program auxch directly (v2)
The atombios tables have an unfortunate restriction on only
being able to write 12 bytes, MST really wants 16-bytes here,
and since the hw can do it, we should just write directly to it.
This uses a module option to allow for it now, and maybe
we should provide the old code as a fallback for a while.
v2: (agd5f)
- move registers to a proper register header
- only enable on DCE5+
- enable by default on DCE5+
- Switch pad to aux mode before using it
- reformat instance handling to better match the
rest of the driver
Signed-off-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/radeon/atombios_dp.c')
| -rw-r--r-- | drivers/gpu/drm/radeon/atombios_dp.c | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/drivers/gpu/drm/radeon/atombios_dp.c b/drivers/gpu/drm/radeon/atombios_dp.c index 8d74de82456e..a014c7bfa764 100644 --- a/drivers/gpu/drm/radeon/atombios_dp.c +++ b/drivers/gpu/drm/radeon/atombios_dp.c @@ -158,7 +158,7 @@ done: #define HEADER_SIZE (BARE_ADDRESS_SIZE + 1) static ssize_t -radeon_dp_aux_transfer(struct drm_dp_aux *aux, struct drm_dp_aux_msg *msg) +radeon_dp_aux_transfer_atom(struct drm_dp_aux *aux, struct drm_dp_aux_msg *msg) { struct radeon_i2c_chan *chan = container_of(aux, struct radeon_i2c_chan, aux); @@ -226,11 +226,20 @@ radeon_dp_aux_transfer(struct drm_dp_aux *aux, struct drm_dp_aux_msg *msg) void radeon_dp_aux_init(struct radeon_connector *radeon_connector) { + struct drm_device *dev = radeon_connector->base.dev; + struct radeon_device *rdev = dev->dev_private; int ret; radeon_connector->ddc_bus->rec.hpd = radeon_connector->hpd.hpd; radeon_connector->ddc_bus->aux.dev = radeon_connector->base.kdev; - radeon_connector->ddc_bus->aux.transfer = radeon_dp_aux_transfer; + if (ASIC_IS_DCE5(rdev)) { + if (radeon_auxch) + radeon_connector->ddc_bus->aux.transfer = radeon_dp_aux_transfer_native; + else + radeon_connector->ddc_bus->aux.transfer = radeon_dp_aux_transfer_atom; + } else { + radeon_connector->ddc_bus->aux.transfer = radeon_dp_aux_transfer_atom; + } ret = drm_dp_aux_register(&radeon_connector->ddc_bus->aux); if (!ret) |