diff options
| 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 | |
| parent | 7527791e1fbd595a294cf6e6f41999d8acf6c43f (diff) | |
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')
| -rw-r--r-- | drivers/gpu/drm/amd/display/dmub/inc/dmub_srv.h | 15 | ||||
| -rw-r--r-- | drivers/gpu/drm/amd/display/dmub/src/dmub_srv.c | 16 |
2 files changed, 31 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/display/dmub/inc/dmub_srv.h b/drivers/gpu/drm/amd/display/dmub/inc/dmub_srv.h index 287fb9a36a64..f8917594036a 100644 --- a/drivers/gpu/drm/amd/display/dmub/inc/dmub_srv.h +++ b/drivers/gpu/drm/amd/display/dmub/inc/dmub_srv.h @@ -419,6 +419,21 @@ enum dmub_status dmub_srv_hw_init(struct dmub_srv *dmub, const struct dmub_srv_hw_params *params); /** + * dmub_srv_hw_reset() - puts the DMUB hardware in reset state if initialized + * @dmub: the dmub service + * + * Before destroying the DMUB service or releasing the backing framebuffer + * memory we'll need to put the DMCUB into reset first. + * + * A subsequent call to dmub_srv_hw_init() will re-enable the DMCUB. + * + * Return: + * DMUB_STATUS_OK - success + * DMUB_STATUS_INVALID - unspecified error + */ +enum dmub_status dmub_srv_hw_reset(struct dmub_srv *dmub); + +/** * dmub_srv_cmd_queue() - queues a command to the DMUB * @dmub: the dmub service * @cmd: the command to queue 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) { |