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drm/amd/display: Include udelay when waiting for INBOX0 ACK

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commit 3c9ea68cb61bd7e5bd312c06a12adada74ff5805 upstream.

When waiting for the ACK for INBOX0 message,
we have to ensure to include the udelay
for proper wait time

Cc: stable@vger.kernel.org # 6.1+
Reviewed-by: Samson Tam <samson.tam@amd.com>
Acked-by: Hamza Mahfooz <hamza.mahfooz@amd.com>
Signed-off-by: Alvin Lee <alvin.lee2@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Alvin Lee 2023-11-06 11:20:15 -05:00 • committed by Greg Kroah-Hartman
parent c5cf436c89
commit 33ed892f0c
1 changed files with 1 additions and 0 deletions
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drivers/gpu/drm/amd/display/dmub/src/dmub_srv.c
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@ -964,6 +964,7 @@ enum dmub_status dmub_srv_wait_for_inbox0_ack(struct dmub_srv *dmub, uint32_t ti
ack = dmub->hw_funcs.read_inbox0_ack_register(dmub); ack = dmub->hw_funcs.read_inbox0_ack_register(dmub);
if (ack) if (ack)
return DMUB_STATUS_OK; return DMUB_STATUS_OK;
udelay(1);
} }
return DMUB_STATUS_TIMEOUT; return DMUB_STATUS_TIMEOUT;
} }