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| author | Aric Cyr <aric.cyr@amd.com> | 2021-10-08 04:34:53 +0300 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2021-10-28 21:26:15 +0300 |
| commit | 8df219bb7d4b14e4e82b3db6da4a73f1b0b767d3 (patch) | |
| tree | 6d88532a226c6348217e31d59ee5cf0c532dadd6 /drivers/gpu/drm/amd/display/include | |
| parent | 1072461cd7725f3e7957371ffb15abf2b82e2720 (diff) | |
| download | linux-8df219bb7d4b14e4e82b3db6da4a73f1b0b767d3.tar.xz | |
drm/amd/display: Handle I2C-over-AUX write channel status update
[Why]
When writing long AUX commands some sinks will respond will write status
update requiring source to read status.
[How]
When a write request is replied with data (AUX_ACK_M), retry a read of
write status to determine when the write is completed.
Reviewed-by: Martin Leung <Martin.Leung@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Acked-by: Agustin Gutierrez <agustin.gutierrez@amd.com>
Signed-off-by: Aric Cyr <aric.cyr@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/display/include')
| -rw-r--r-- | drivers/gpu/drm/amd/display/include/i2caux_interface.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/display/include/i2caux_interface.h b/drivers/gpu/drm/amd/display/include/i2caux_interface.h index c7fbb9c3ad6b..418fbf8c5c3a 100644 --- a/drivers/gpu/drm/amd/display/include/i2caux_interface.h +++ b/drivers/gpu/drm/amd/display/include/i2caux_interface.h @@ -41,6 +41,8 @@ struct aux_payload { * reset it to read data */ bool write; bool mot; + bool write_status_update; + uint32_t address; uint32_t length; uint8_t *data; @@ -53,6 +55,7 @@ struct aux_payload { * zero means "use default value" */ uint32_t defer_delay; + }; struct aux_command { |