Commit 0c427ac7 authored by Jouni Högander's avatar Jouni Högander
Browse files

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



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: default avatarJouni Högander <jouni.hogander@intel.com>
Reviewed-by: default avatarMika Kahola <mika.kahola@intel.com>
Link: https://lore.kernel.org/r/20250414100508.1208774-10-jouni.hogander@intel.com
parent b7effa32

drivers/gpu/drm/i915/display/intel_psr.c

+40 −0
Original line number Diff line number Diff line
@@ -3797,6 +3797,46 @@ void intel_psr_notify_pipe_change(struct intel_atomic_state *state, 
	}

}



/**

 * 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)

{

drivers/gpu/drm/i915/display/intel_psr.h

+2 −0
Original line number Diff line number Diff line
@@ -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);