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| author | Nicholas Kazlauskas <nicholas.kazlauskas@amd.com> | 2020-01-09 14:41:22 -0500 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2020-01-22 16:55:28 -0500 |
| commit | 0167da498d57dddf31eb30516d1fae0f31ddecb6 (patch) | |
| tree | 624e243ab0fe907832f2e5336039b6c3ee0e3189 /drivers/gpu/drm/amd/display/dmub/src | |
| parent | 7527791e1fbd595a294cf6e6f41999d8acf6c43f (diff) | |
| download | linux-0167da498d57dddf31eb30516d1fae0f31ddecb6.tar.gz linux-0167da498d57dddf31eb30516d1fae0f31ddecb6.tar.bz2 linux-0167da498d57dddf31eb30516d1fae0f31ddecb6.zip | |
drm/amd/display: Add hardware reset interface for DMUB service
[Why]
We'll need this to perform a clean shutdown before unloading the driver.
[How]
It will call reset internally and set hw_init to false. It won't do
anything if the hardware isn't initialized.
Signed-off-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
Acked-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/display/dmub/src')
| -rw-r--r-- | drivers/gpu/drm/amd/display/dmub/src/dmub_srv.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/display/dmub/src/dmub_srv.c b/drivers/gpu/drm/amd/display/dmub/src/dmub_srv.c index dee676335d73..ea99d4cf34cc 100644 --- a/drivers/gpu/drm/amd/display/dmub/src/dmub_srv.c +++ b/drivers/gpu/drm/amd/display/dmub/src/dmub_srv.c @@ -415,6 +415,22 @@ enum dmub_status dmub_srv_hw_init(struct dmub_srv *dmub, return DMUB_STATUS_OK; } +enum dmub_status dmub_srv_hw_reset(struct dmub_srv *dmub) +{ + if (!dmub->sw_init) + return DMUB_STATUS_INVALID; + + if (dmub->hw_init == false) + return DMUB_STATUS_OK; + + if (dmub->hw_funcs.reset) + dmub->hw_funcs.reset(dmub); + + dmub->hw_init = false; + + return DMUB_STATUS_OK; +} + enum dmub_status dmub_srv_cmd_queue(struct dmub_srv *dmub, const struct dmub_cmd_header *cmd) { |