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drm/amd/display: Wait for mailbox ready when powering up DMCUB

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[Why]
Otherwise we can send commands too early and they don't execute until
the next command is sent.

[How]
Check the extra status bit when polling for HW powered up.

Reviewed-by: Charlene Liu <charlene.liu@amd.com>
Acked-by: Tom Chung <chiahsuan.chung@amd.com>
Signed-off-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Nicholas Kazlauskas 2024-01-12 10:06:15 -05:00 committed by Alex Deucher
parent 05d3dfd3ed
commit 2812b5add4
1 changed files with 11 additions and 2 deletions
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13
drivers/gpu/drm/amd/display/dmub/src/dmub_srv.c
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@ -791,11 +791,20 @@ enum dmub_status dmub_srv_cmd_execute(struct dmub_srv *dmub)
bool dmub_srv_is_hw_pwr_up(struct dmub_srv *dmub)
{
union dmub_fw_boot_status status;
if (!dmub->hw_funcs.is_hw_powered_up)
return true;
return dmub->hw_funcs.is_hw_powered_up(dmub) &&
dmub->hw_funcs.is_hw_init(dmub);
if (!dmub->hw_funcs.is_hw_powered_up(dmub))
return false;
if (!dmub->hw_funcs.is_hw_init(dmub))
return false;
status = dmub->hw_funcs.get_fw_status(dmub);
return status.bits.dal_fw && status.bits.mailbox_rdy;
}
enum dmub_status dmub_srv_wait_for_hw_pwr_up(struct dmub_srv *dmub,