On Tue, Jan 14, 2014 at 9:55 AM, Thierry Reding <thierry.reding@xxxxxxxxx> wrote: > Hi, > > This small series introduces some infrastructure to support AUX channels > in a generic way. Drivers make use of it by embedding and filling in a > struct drm_dp_aux. Various helpers can then be used to for example read > from or write to the DPCD. > > Patch 1 adds the basic infrastructure as well as a couple of helpers to > access the DPCD. > > The helper introduced in patch 2 can be used to obtain the link status > as expected by various existing DP helpers. > > More convenience helpers are added in patch 3, which can come in handy > during DP initialization. > > An AUX channel can also be used to implement I2C-over-AUX and patch 4 > implements an I2C adapter that can be used with the DRM EDID helpers. > > Changes in v3: > - address comments by Jani Nikula: > - keep debug and error messages in AUX helpers > - read/write back-to-back registers in chunks > - separate link power up and configuration > - do not power up for DPCD prior to 1.1 > - sleep after power up as per the spec > - return number of bytes transferred > - factor out some common code > - reorder function arguments > - fix typo in comment > - address comments by Daniel Vetter: > - embed i2c_adapter within struct drm_dp_aux > - describe error codes > > Changes in v2: > - reimplement I2C-over-AUX functionality to get rid of the additional > layer > - extract retry logic from existing drivers > - add more kerneldoc comments > Just one small spelling fix in patch 3, with that fixed, Reviewed-by: Alex Deucher <alexander.deucher@xxxxxxx> Thanks for doing this! Alex > Thierry > > Thierry Reding (4): > drm/dp: Add AUX channel infrastructure > drm/dp: Add drm_dp_dpcd_read_link_status() > drm/dp: Add DisplayPort link helpers > drm/dp: Allow registering AUX channels as I2C busses > > drivers/gpu/drm/drm_dp_helper.c | 403 ++++++++++++++++++++++++++++++++++++++++ > include/drm/drm_dp_helper.h | 92 +++++++++ > 2 files changed, 495 insertions(+) > > -- > 1.8.4.2 > > _______________________________________________ > dri-devel mailing list > dri-devel@xxxxxxxxxxxxxxxxxxxxx > http://lists.freedesktop.org/mailman/listinfo/dri-devel _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/intel-gfx
