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disp: msm: sde: adjust qsync linecount calculation

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Adjust the QSYNC line count calculation to compensate for the
idle time, when no transfers are actively taking place.

Change-Id: If91eab25321eea6e6880f07605c5a9c1b7b7ee05
Signed-off-by: Steve Cohen <cohens@codeaurora.org>
This commit is contained in:
Steve Cohen
2020-06-17 22:55:12 -04:00
committed by Gerrit - the friendly Code Review server
parent 4d45309328
commit 36bf90e02f
3 changed files with 40 additions and 9 deletions
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18
msm/sde/sde_encoder.c
View File

@@ -4043,6 +4043,24 @@ void sde_encoder_helper_get_pp_line_count(struct drm_encoder *drm_enc,
}
}
void sde_encoder_helper_get_transfer_time(struct drm_encoder *drm_enc,
u32 *transfer_time_us)
{
struct sde_encoder_virt *sde_enc;
struct msm_mode_info *info;
if (!drm_enc || !transfer_time_us) {
SDE_ERROR("bad arg: encoder:%d transfer_time:%d\n", !drm_enc,
!transfer_time_us);
return;
}
sde_enc = to_sde_encoder_virt(drm_enc);
info = &sde_enc->mode_info;
*transfer_time_us = info->mdp_transfer_time_us;
}
int sde_encoder_helper_reset_mixers(struct sde_encoder_phys *phys_enc,
struct drm_framebuffer *fb)
{

8
msm/sde/sde_encoder_phys.h
View File

@@ -539,6 +539,14 @@ void sde_encoder_phys_setup_cdm(struct sde_encoder_phys *phys_enc,
void sde_encoder_helper_get_pp_line_count(struct drm_encoder *drm_enc,
struct sde_hw_pp_vsync_info *info);
/**
* sde_encoder_helper_get_transfer_time - get the mdp transfer time in usecs
* @drm_enc: Pointer to drm encoder structure
* @transfer_time_us: Pointer to store the output value
*/
void sde_encoder_helper_get_transfer_time(struct drm_encoder *drm_enc,
u32 *transfer_time_us);
/**
* sde_encoder_helper_trigger_flush - control flush helper function
* This helper function may be optionally specified by physical

23
msm/sde/sde_encoder_phys_cmd.c
View File

@@ -932,7 +932,7 @@ static int _get_tearcheck_threshold(struct sde_encoder_phys *phys_enc,
struct drm_connector *conn = phys_enc->connector;
u32 qsync_mode;
struct drm_display_mode *mode;
u32 threshold_lines = 0;
u32 threshold_lines = DEFAULT_TEARCHECK_SYNC_THRESH_START;
struct sde_encoder_phys_cmd *cmd_enc =
to_sde_encoder_phys_cmd(phys_enc);
@@ -950,8 +950,9 @@ static int _get_tearcheck_threshold(struct sde_encoder_phys *phys_enc,
u32 slow_time_ns;
u32 default_time_ns;
u32 extra_time_ns;
u32 total_extra_lines;
u32 default_line_time_ns;
u32 idle_time_ns = 0;
u32 transfer_time_us = 0;
if (phys_enc->parent_ops.get_qsync_fps)
phys_enc->parent_ops.get_qsync_fps(
@@ -974,27 +975,31 @@ static int _get_tearcheck_threshold(struct sde_encoder_phys *phys_enc,
/* Calculate the number of extra lines*/
slow_time_ns = (1 * 1000000000) / qsync_min_fps;
default_time_ns = (1 * 1000000000) / default_fps;
extra_time_ns = slow_time_ns - default_time_ns;
sde_encoder_helper_get_transfer_time(phys_enc->parent,
&transfer_time_us);
if (transfer_time_us)
idle_time_ns = default_time_ns -
(1000 * transfer_time_us);
extra_time_ns = slow_time_ns - default_time_ns + idle_time_ns;
default_line_time_ns = (1 * 1000000000) / (default_fps * yres);
total_extra_lines = extra_time_ns / default_line_time_ns;
threshold_lines += total_extra_lines;
threshold_lines = extra_time_ns / default_line_time_ns;
SDE_DEBUG_CMDENC(cmd_enc, "slow:%d default:%d extra:%d(ns)\n",
slow_time_ns, default_time_ns, extra_time_ns);
SDE_DEBUG_CMDENC(cmd_enc, "extra_lines:%d threshold:%d\n",
total_extra_lines, threshold_lines);
SDE_DEBUG_CMDENC(cmd_enc, "xfer:%d(us) idle:%d(ns) lines:%d\n",
transfer_time_us, idle_time_ns, threshold_lines);
SDE_DEBUG_CMDENC(cmd_enc, "min_fps:%d fps:%d yres:%d\n",
qsync_min_fps, default_fps, yres);
SDE_EVT32(qsync_mode, qsync_min_fps, extra_time_ns, default_fps,
yres, threshold_lines);
yres, transfer_time_us, threshold_lines);
*extra_frame_trigger_time = extra_time_ns;
}
exit:
threshold_lines += DEFAULT_TEARCHECK_SYNC_THRESH_START;
return threshold_lines;
}