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drm/i915/psr: Add interface to notify PSR of vblank enable/disable

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To implement Wa_16025596647 we need to get notification of vblank interrupt
enable/disable. Add new interface to PSR code for this notification.

Signed-off-by: Jouni Högander <jouni.hogander@intel.com>
Reviewed-by: Mika Kahola <mika.kahola@intel.com>
Link: https://lore.kernel.org/r/20250414100508.1208774-10-jouni.hogander@intel.com
This commit is contained in:
Jouni Högander
2025-04-14 13:05:04 +03:00
parent b7effa3238
commit 0c427ac78a
2 changed files with 42 additions and 0 deletions
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40
drivers/gpu/drm/i915/display/intel_psr.c
View File

@@ -3797,6 +3797,46 @@ unlock:
}
}
/**
* intel_psr_notify_vblank_enable_disable - Notify PSR about enable/disable of vblank
* @display: intel display struct
* @enable: enable/disable
*
* This is targeted for underrun on idle PSR HW bug (Wa_16025596647) to apply
* remove the workaround when vblank is getting enabled/disabled
*/
void intel_psr_notify_vblank_enable_disable(struct intel_display *display,
bool enable)
{
struct intel_encoder *encoder;
for_each_intel_encoder_with_psr(display->drm, encoder) {
struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
mutex_lock(&intel_dp->psr.lock);
if (intel_dp->psr.panel_replay_enabled) {
mutex_unlock(&intel_dp->psr.lock);
break;
}
if (intel_dp->psr.enabled)
intel_psr_apply_underrun_on_idle_wa_locked(intel_dp);
mutex_unlock(&intel_dp->psr.lock);
return;
}
/*
* NOTE: intel_display_power_set_target_dc_state is used
* only by PSR * code for DC3CO handling. DC3CO target
* state is currently disabled in * PSR code. If DC3CO
* is taken into use we need take that into account here
* as well.
*/
intel_display_power_set_target_dc_state(display, enable ? DC_STATE_DISABLE :
DC_STATE_EN_UPTO_DC6);
}
static void
psr_source_status(struct intel_dp *intel_dp, struct seq_file *m)
{

2
drivers/gpu/drm/i915/display/intel_psr.h
View File

@@ -64,6 +64,8 @@ void intel_psr_notify_pipe_change(struct intel_atomic_state *state,
struct intel_crtc *crtc, bool enable);
void intel_psr_notify_dc5_dc6(struct intel_display *display);
void intel_psr_dc5_dc6_wa_init(struct intel_display *display);
void intel_psr_notify_vblank_enable_disable(struct intel_display *display,
bool enable);
bool intel_psr_link_ok(struct intel_dp *intel_dp);
void intel_psr_lock(const struct intel_crtc_state *crtc_state);