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drm/amd/display: Modify DCN401 DMUB reset & halt sequence

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[WHY&HOW]
If DMCUB is already disabled or reset, no need to send the halt command
again.

Reviewed-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Signed-off-by: Dillon Varone <dillon.varone@amd.com>
Signed-off-by: Tom Chung <chiahsuan.chung@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Dillon Varone
2025-05-09 11:31:46 -04:00
committed by Alex Deucher
parent 4a16285aa1
commit 6d8f73885e
1 changed files with 6 additions and 10 deletions
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16
drivers/gpu/drm/amd/display/dmub/src/dmub_dcn401.c
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@@ -66,24 +66,20 @@ void dmub_dcn401_reset(struct dmub_srv *dmub)
const uint32_t timeout_us = 1 * 1000 * 1000; //1s
const uint32_t poll_delay_us = 1; //1us
uint32_t i = 0;
uint32_t in_reset, scratch, pwait_mode;
uint32_t enabled, in_reset, scratch, pwait_mode;
REG_GET(DMCUB_CNTL2, DMCUB_SOFT_RESET, &in_reset);
REG_GET(DMCUB_CNTL,
DMCUB_ENABLE, &enabled);
REG_GET(DMCUB_CNTL2,
DMCUB_SOFT_RESET, &in_reset);
if (in_reset == 0) {
if (enabled && in_reset == 0) {
cmd.bits.status = 1;
cmd.bits.command_code = DMUB_GPINT__STOP_FW;
cmd.bits.param = 0;
dmub->hw_funcs.set_gpint(dmub, cmd);
for (i = 0; i < timeout_us; i++) {
if (dmub->hw_funcs.is_gpint_acked(dmub, cmd))
break;
udelay(poll_delay_us);
}
for (; i < timeout_us; i++) {
scratch = dmub->hw_funcs.get_gpint_response(dmub);
if (scratch == DMUB_GPINT__STOP_FW_RESPONSE)