Commit 0167da49 authored by Nicholas Kazlauskas's avatar Nicholas Kazlauskas Committed by Alex Deucher
Browse files

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: default avatarNicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Reviewed-by: default avatarTony Cheng <Tony.Cheng@amd.com>
Acked-by: default avatarBhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent 7527791e

drivers/gpu/drm/amd/display/dmub/inc/dmub_srv.h

+15 −0
Original line number Diff line number Diff line
@@ -418,6 +418,21 @@ enum dmub_status dmub_srv_is_hw_init(struct dmub_srv *dmub, bool *is_hw_init); 
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

drivers/gpu/drm/amd/display/dmub/src/dmub_srv.c

+16 −0
Original line number Diff line number Diff line
@@ -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)

{

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