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disp: msm: sde: implement drm hooks to get precise vblank timestamp

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Add precise vblank timestamp support through the DRM framework.
Implement the vblank related hooks to get the vblank count and
timestamp. Use MDSS 8.x, hardware feature that supports logging
of the vsync timestamp counter which can be used to derive the
accurate kernel timestamp. The current ktime would be returned
for older targets to support backward compatibility.

Change-Id: I2d35ed4a643a519e602278b6d16e67ccee16a60b
Signed-off-by: Veera Sundaram Sankaran <veeras@codeaurora.org>
This commit is contained in:
Veera Sundaram Sankaran
2020-09-17 15:20:37 -07:00
parent b554f01a10
commit 3cef1faa29
6 changed files with 147 additions and 13 deletions
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54
msm/sde/sde_encoder.c
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@@ -3133,6 +3133,7 @@ static void sde_encoder_vblank_callback(struct drm_encoder *drm_enc,
{
struct sde_encoder_virt *sde_enc = NULL;
unsigned long lock_flags;
ktime_t ts = 0;
if (!drm_enc || !phy_enc)
return;
@@ -3140,16 +3141,26 @@ static void sde_encoder_vblank_callback(struct drm_encoder *drm_enc,
SDE_ATRACE_BEGIN("encoder_vblank_callback");
sde_enc = to_sde_encoder_virt(drm_enc);
/*
* calculate accurate vsync timestamp when available
* set current time otherwise
*/
if (phy_enc->sde_kms && phy_enc->sde_kms->catalog->has_precise_vsync_ts)
ts = sde_encoder_calc_last_vsync_timestamp(drm_enc);
if (!ts)
ts = ktime_get();
spin_lock_irqsave(&sde_enc->enc_spinlock, lock_flags);
phy_enc->last_vsync_timestamp = ts;
atomic_inc(&phy_enc->vsync_cnt);
if (sde_enc->crtc_vblank_cb)
sde_enc->crtc_vblank_cb(sde_enc->crtc_vblank_cb_data);
sde_enc->crtc_vblank_cb(sde_enc->crtc_vblank_cb_data, ts);
spin_unlock_irqrestore(&sde_enc->enc_spinlock, lock_flags);
if (phy_enc->sde_kms &&
phy_enc->sde_kms->catalog->uidle_cfg.debugfs_perf)
sde_encoder_perf_uidle_status(phy_enc->sde_kms, sde_enc->crtc);
atomic_inc(&phy_enc->vsync_cnt);
SDE_ATRACE_END("encoder_vblank_callback");
}
@@ -3178,7 +3189,7 @@ static void sde_encoder_underrun_callback(struct drm_encoder *drm_enc,
}
void sde_encoder_register_vblank_callback(struct drm_encoder *drm_enc,
void (*vbl_cb)(void *), void *vbl_data)
void (*vbl_cb)(void *, ktime_t), void *vbl_data)
{
struct sde_encoder_virt *sde_enc = to_sde_encoder_virt(drm_enc);
unsigned long lock_flags;
@@ -5209,6 +5220,43 @@ enum sde_intf_mode sde_encoder_get_intf_mode(struct drm_encoder *encoder)
return INTF_MODE_NONE;
}
u32 sde_encoder_get_frame_count(struct drm_encoder *encoder)
{
struct sde_encoder_virt *sde_enc = NULL;
struct sde_encoder_phys *phys;
if (!encoder) {
SDE_ERROR("invalid encoder\n");
return 0;
}
sde_enc = to_sde_encoder_virt(encoder);
phys = sde_enc->cur_master;
return phys ? atomic_read(&phys->vsync_cnt) : 0;
}
bool sde_encoder_get_vblank_timestamp(struct drm_encoder *encoder,
ktime_t *tvblank)
{
struct sde_encoder_virt *sde_enc = NULL;
struct sde_encoder_phys *phys;
if (!encoder) {
SDE_ERROR("invalid encoder\n");
return false;
}
sde_enc = to_sde_encoder_virt(encoder);
phys = sde_enc->cur_master;
if (!phys)
return false;
*tvblank = phys->last_vsync_timestamp;
return *tvblank ? true : false;
}
static void _sde_encoder_cache_hw_res_cont_splash(
struct drm_encoder *encoder,
struct sde_kms *sde_kms)