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Merge "disp: msm: dsi: update the threshold time based on panel jitter"

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qctecmdr 2019-08-09 16:06:03 -07:00 • committed by Gerrit - the friendly Code Review server
commit 105e91a931
1 changed files with 30 additions and 0 deletions
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30
msm/dsi/dsi_panel.c
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@ -30,6 +30,7 @@
#define DEFAULT_PANEL_JITTER_ARRAY_SIZE 2
#define MAX_PANEL_JITTER 10
#define DEFAULT_PANEL_PREFILL_LINES 25
#define MIN_PREFILL_LINES 35
enum dsi_dsc_ratio_type {
DSC_8BPC_8BPP,
@ -3535,6 +3536,8 @@ void dsi_panel_calc_dsi_transfer_time(struct dsi_host_common_cfg *config,
struct msm_display_dsc_info *dsc = mode->timing.dsc;
struct dsi_mode_info *timing = &mode->timing;
struct dsi_display_mode *display_mode;
u32 jitter_numer, jitter_denom, prefill_lines;
u32 min_threshold_us, prefill_time_us;
/* Packet overlead in bits,2 bytes header + 2 bytes checksum
* + 1 byte dcs data command.
@ -3543,6 +3546,9 @@ void dsi_panel_calc_dsi_transfer_time(struct dsi_host_common_cfg *config,
display_mode = container_of(timing, struct dsi_display_mode, timing);
jitter_numer = display_mode->priv_info->panel_jitter_numer;
jitter_denom = display_mode->priv_info->panel_jitter_denom;
frame_time_us = mult_frac(1000, 1000, (timing->refresh_rate));
if (timing->dsc_enabled) {
@ -3574,6 +3580,30 @@ 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 {
min_threshold_us = mult_frac(frame_time_us,
jitter_numer, (jitter_denom * 100));
/*
* Increase the prefill_lines proportionately as recommended
* 35lines for 60fps, 52 for 90fps, 70lines for 120fps.
*/
prefill_lines = mult_frac(MIN_PREFILL_LINES,
timing->refresh_rate, 60);
prefill_time_us = mult_frac(frame_time_us, prefill_lines,
(timing->v_active));
/*
* Threshold is sum of panel jitter time, prefill line time
* plus 100usec buffer time.
*/
min_threshold_us = min_threshold_us + 100 + prefill_time_us;
DSI_DEBUG("min threshold time=%d\n", min_threshold_us);
if (min_threshold_us > frame_threshold_us)
frame_threshold_us = min_threshold_us;
timing->dsi_transfer_time_us = frame_time_us -
frame_threshold_us;
}