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disp: msm: dsi: update transfer time calculation during RSC disable

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If RSCC solver is disabled, the transfer time calculation can be
skip using TE jitter. This case threshold time becomes prefill
time + DCS command transfer threshold. The threshold for DCS
command transfer is configured to 40us.

Change-Id: I1260df33e9d928aacd8961bdedfcd136563a806b
Signed-off-by: Satya Rama Aditya Pinapala <psraditya30@codeaurora.org>
This commit is contained in:
Satya Rama Aditya Pinapala
2021-05-19 15:10:29 -07:00
vanhempi 134e62f655
commit e993215979
1 muutettua tiedostoa jossa 19 lisäystä ja 9 poistoa
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28
msm/dsi/dsi_panel.c
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@@ -35,6 +35,8 @@
#define DEFAULT_PANEL_PREFILL_LINES 25
#define HIGH_REFRESH_RATE_THRESHOLD_TIME_US 500
#define MIN_PREFILL_LINES 40
#define RSCC_MODE_THRESHOLD_TIME_US 40
#define DCS_COMMAND_THRESHOLD_TIME_US 40
static void dsi_dce_prepare_pps_header(char *buf, u32 pps_delay_ms)
{
@@ -3961,11 +3963,22 @@ void dsi_panel_calc_dsi_transfer_time(struct dsi_host_common_cfg *config,
timing->min_dsi_clk_hz = min_bitclk_hz;
min_threshold_us = mult_frac(frame_time_us,
jitter_numer, (jitter_denom * 100));
/*
* Apart from prefill line time, we need to take into account RSCC mode threshold time. In
* cases where RSC is disabled, as jitter is no longer considered we need to make sure we
* have enough time for DCS command transfer. As of now, the RSC threshold time and DCS
* threshold time are configured to 40us.
*/
if (mode->priv_info->disable_rsc_solver) {
min_threshold_us = DCS_COMMAND_THRESHOLD_TIME_US;
} else {
min_threshold_us = mult_frac(frame_time_us, jitter_numer, (jitter_denom * 100));
min_threshold_us += RSCC_MODE_THRESHOLD_TIME_US;
}
/*
* Increase the prefill_lines proportionately as recommended
* 35lines for 60fps, 52 for 90fps, 70lines for 120fps.
* 40lines for 60fps, 60 for 90fps, 120lines for 120fps, and so on.
*/
prefill_lines = mult_frac(MIN_PREFILL_LINES,
timing->refresh_rate, 60);
@@ -3973,11 +3986,7 @@ void dsi_panel_calc_dsi_transfer_time(struct dsi_host_common_cfg *config,
prefill_time_us = mult_frac(frame_time_us, prefill_lines,
(timing->v_active));
/*
* Threshold is sum of panel jitter time, prefill line time
* plus 64usec buffer time.
*/
min_threshold_us = min_threshold_us + 64 + prefill_time_us;
min_threshold_us = min_threshold_us + prefill_time_us;
DSI_DEBUG("min threshold time=%d\n", min_threshold_us);
@@ -3995,7 +4004,8 @@ void dsi_panel_calc_dsi_transfer_time(struct dsi_host_common_cfg *config,
timing->dsi_transfer_time_us =
mode->priv_info->mdp_transfer_time_us;
} else {
if (min_threshold_us > frame_threshold_us)
if ((min_threshold_us > frame_threshold_us) ||
(mode->priv_info->disable_rsc_solver))
frame_threshold_us = min_threshold_us;
timing->dsi_transfer_time_us = frame_time_us -