diff options
| author | Shirish S <shirish.s@amd.com> | 2018-02-23 16:10:13 +0530 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2018-02-28 15:38:40 -0500 |
| commit | cc195141133ac3e767d930bedd8294ceebf1f10b (patch) | |
| tree | 01a41c8eb736fb6ea9ef63d7998cb5cbcfd968ab /drivers/gpu/drm/amd/display/dc/core/dc_link_ddc.c | |
| parent | 9f0178fb67699992d38601cb923b434f9986dd68 (diff) | |
drm/amd/display: make dm_dp_aux_transfer return payload bytes instead of size
The drm layer expects aux->transfer() to return the payload bytes read.
Currently dm_dp_aux_transfer() returns the payload size which does not
gets updated during the read, hence not giving the right data for the
drm layer to pars edid. This leads to the drm layer to conclude as the
edid is BAD and hence some monitors/devices dont get detected properly.
This patch changes the return type of dm_dp_aux_transfer() to actual
bytes read during DP_AUX_NATIVE_READ & DP_AUX_I2C_READ.
Signed-off-by: Shirish S <shirish.s@amd.com>
Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/display/dc/core/dc_link_ddc.c')
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/core/dc_link_ddc.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link_ddc.c b/drivers/gpu/drm/amd/display/dc/core/dc_link_ddc.c index d5294798b0a5..49c2face1e7a 100644 --- a/drivers/gpu/drm/amd/display/dc/core/dc_link_ddc.c +++ b/drivers/gpu/drm/amd/display/dc/core/dc_link_ddc.c @@ -629,7 +629,7 @@ bool dal_ddc_service_query_ddc_data( return ret; } -enum ddc_result dal_ddc_service_read_dpcd_data( +ssize_t dal_ddc_service_read_dpcd_data( struct ddc_service *ddc, bool i2c, enum i2c_mot_mode mot, @@ -660,8 +660,9 @@ enum ddc_result dal_ddc_service_read_dpcd_data( if (dal_i2caux_submit_aux_command( ddc->ctx->i2caux, ddc->ddc_pin, - &command)) - return DDC_RESULT_SUCESSFULL; + &command)) { + return (ssize_t)command.payloads->length; + } return DDC_RESULT_FAILED_OPERATION; } |