From: ChunTao Tso <[email protected]> [Why] Because sometime DMUB GPINT will time out, it will cause we return 0 as residency number.
[How] Retry to avoid this happened. Reviewed-by: Robin Chen <[email protected]> Signed-off-by: ChunTao Tso <[email protected]> Signed-off-by: Zaeem Mohamed <[email protected]> --- .../gpu/drm/amd/display/dc/dce/dmub_replay.c | 18 ++++++++++++++---- 1 file changed, 14 insertions(+), 4 deletions(-) diff --git a/drivers/gpu/drm/amd/display/dc/dce/dmub_replay.c b/drivers/gpu/drm/amd/display/dc/dce/dmub_replay.c index 14f935961672..c31e4f26a305 100644 --- a/drivers/gpu/drm/amd/display/dc/dce/dmub_replay.c +++ b/drivers/gpu/drm/amd/display/dc/dce/dmub_replay.c @@ -12,6 +12,8 @@ #define MAX_PIPES 6 +#define GPINT_RETRY_NUM 20 + static const uint8_t DP_SINK_DEVICE_STR_ID_1[] = {7, 1, 8, 7, 3}; static const uint8_t DP_SINK_DEVICE_STR_ID_2[] = {7, 1, 8, 7, 5}; @@ -222,6 +224,7 @@ static void dmub_replay_residency(struct dmub_replay *dmub, uint8_t panel_inst, uint32_t *residency, const bool is_start, enum pr_residency_mode mode) { uint16_t param = (uint16_t)(panel_inst << 8); + uint32_t i = 0; switch (mode) { case PR_RESIDENCY_MODE_PHY: @@ -249,10 +252,17 @@ static void dmub_replay_residency(struct dmub_replay *dmub, uint8_t panel_inst, if (is_start) param |= REPLAY_RESIDENCY_ENABLE; - // Send gpint command and wait for ack - if (!dc_wake_and_execute_gpint(dmub->ctx, DMUB_GPINT__REPLAY_RESIDENCY, param, - residency, DM_DMUB_WAIT_TYPE_WAIT_WITH_REPLY)) - *residency = 0; + for (i = 0; i < GPINT_RETRY_NUM; i++) { + // Send gpint command and wait for ack + if (dc_wake_and_execute_gpint(dmub->ctx, DMUB_GPINT__REPLAY_RESIDENCY, param, + residency, DM_DMUB_WAIT_TYPE_WAIT_WITH_REPLY)) + return; + + udelay(100); + } + + // it means gpint retry many times + *residency = 0; } /* -- 2.34.1
