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drm/amd/display: Implement PSR wait for enable/disable 

[Why]
For DMUB implementation of PSR, the 'wait' parameter,
used to determine if driver should wait for PSR enable/disable,
is not implemented correctly.

[How]
Implement wait for PSR enable/disable.

Signed-off-by: Wyatt Wood <wyatt.wood@amd.com>
Reviewed-by: Anthony Koo <Anthony.Koo@amd.com>
Acked-by: Qingqing Zhuo <qingqing.zhuo@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Wyatt Wood 2020-09-10 21:50:52 -04:00 committed by Alex Deucher
parent b50d55517d
commit a9edc81564
3 changed files with 28 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/gpu/drm/amd/display/dc/core/dc_link.c
View File

@ -2566,7 +2566,7 @@ bool dc_link_set_psr_allow_active(struct dc_link *link, bool allow_active, bool
link->psr_settings.psr_allow_active = allow_active;
if (psr != NULL && link->psr_settings.psr_feature_enabled)
psr->funcs->psr_enable(psr, allow_active);
psr->funcs->psr_enable(psr, allow_active, wait);
else if ((dmcu != NULL && dmcu->funcs->is_dmcu_initialized(dmcu)) && link->psr_settings.psr_feature_enabled)
dmcu->funcs->set_psr_enable(dmcu, allow_active, wait);
else

27
drivers/gpu/drm/amd/display/dc/dce/dmub_psr.c
View File

@ -119,10 +119,11 @@ static bool dmub_psr_set_version(struct dmub_psr *dmub, struct dc_stream_state *
/**
* Enable/Disable PSR.
*/
static void dmub_psr_enable(struct dmub_psr *dmub, bool enable)
static void dmub_psr_enable(struct dmub_psr *dmub, bool enable, bool wait)
{
union dmub_rb_cmd cmd;
struct dc_context *dc = dmub->ctx;
uint32_t retry_count, psr_state = 0;
cmd.psr_enable.header.type = DMUB_CMD__PSR;
@ -136,6 +137,30 @@ static void dmub_psr_enable(struct dmub_psr *dmub, bool enable)
dc_dmub_srv_cmd_queue(dc->dmub_srv, &cmd);
dc_dmub_srv_cmd_execute(dc->dmub_srv);
dc_dmub_srv_wait_idle(dc->dmub_srv);
/* Below loops 1000 x 500us = 500 ms.
* Exit PSR may need to wait 1-2 frames to power up. Timeout after at
* least a few frames. Should never hit the max retry assert below.
*/
if (wait) {
for (retry_count = 0; retry_count <= 1000; retry_count++) {
dmub_psr_get_state(dmub, &psr_state);
if (enable) {
if (psr_state != 0)
break;
} else {
if (psr_state == 0)
break;
}
udelay(500);
}
/* assert if max retry hit */
if (retry_count >= 1000)
ASSERT(0);
}
}
/**

2
drivers/gpu/drm/amd/display/dc/dce/dmub_psr.h
View File

@ -36,7 +36,7 @@ struct dmub_psr {
struct dmub_psr_funcs {
bool (*psr_copy_settings)(struct dmub_psr *dmub, struct dc_link *link, struct psr_context *psr_context);
void (*psr_enable)(struct dmub_psr *dmub, bool enable);
void (*psr_enable)(struct dmub_psr *dmub, bool enable, bool wait);
void (*psr_get_state)(struct dmub_psr *dmub, uint32_t *psr_state);
void (*psr_set_level)(struct dmub_psr *dmub, uint16_t psr_level);
};