drm/i915/display: Replace dc3co_enabled with dc3co_exitline on intel_psr struct

It replaces dc3co_enabled with dc3co_exitline on intel_psr struct.  And
it saves dc3co_exitline, not dc3co_enabled, so we can use dc3co_exitline
without intel_crtc_state on other psr internal function like as
intel_psr_enable_source().

Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: José Roberto de Souza <jose.souza@intel.com>
Cc: Anshuman Gupta <anshuman.gupta@intel.com>
Signed-off-by: Gwan-gyeong Mun <gwan-gyeong.mun@intel.com>
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Reviewed-by: Anshuman Gupta <anshuman.gupta@intel.com>
Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210519000625.3184321-12-lucas.demarchi@intel.com

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

@@ -1498,7 +1498,7 @@ struct intel_psr {
 	bool sink_not_reliable;
 	bool irq_aux_error;
 	u16 su_x_granularity;
-	bool dc3co_enabled;
+	u32 dc3co_exitline;
 	u32 dc3co_exit_delay;
 	struct delayed_work dc3co_work;
 	struct drm_dp_vsc_sdp vsc;

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

@@ -638,7 +638,7 @@ static void tgl_dc3co_disable_work(struct work_struct *work)
 
 static void tgl_disallow_dc3co_on_psr2_exit(struct intel_dp *intel_dp)
 {
-	if (!intel_dp->psr.dc3co_enabled)
+	if (!intel_dp->psr.dc3co_exitline)
 		return;
 
 	cancel_delayed_work(&intel_dp->psr.dc3co_work);
@@ -1010,7 +1010,7 @@ static void intel_psr_enable_source(struct intel_dp *intel_dp,
 
 	psr_irq_control(intel_dp);
 
-	if (crtc_state->dc3co_exitline) {
+	if (intel_dp->psr.dc3co_exitline) {
 		u32 val;
 
 		/*
@@ -1019,7 +1019,7 @@ static void intel_psr_enable_source(struct intel_dp *intel_dp,
 		 */
 		val = intel_de_read(dev_priv, EXITLINE(cpu_transcoder));
 		val &= ~EXITLINE_MASK;
-		val |= crtc_state->dc3co_exitline << EXITLINE_SHIFT;
+		val |= intel_dp->psr.dc3co_exitline << EXITLINE_SHIFT;
 		val |= EXITLINE_ENABLE;
 		intel_de_write(dev_priv, EXITLINE(cpu_transcoder), val);
 	}
@@ -1044,11 +1044,11 @@ static void intel_psr_enable_locked(struct intel_dp *intel_dp,
 	intel_dp->psr.psr2_enabled = crtc_state->has_psr2;
 	intel_dp->psr.busy_frontbuffer_bits = 0;
 	intel_dp->psr.pipe = to_intel_crtc(crtc_state->uapi.crtc)->pipe;
-	intel_dp->psr.dc3co_enabled = !!crtc_state->dc3co_exitline;
 	intel_dp->psr.transcoder = crtc_state->cpu_transcoder;
 	/* DC5/DC6 requires at least 6 idle frames */
 	val = usecs_to_jiffies(intel_get_frame_time_us(crtc_state) * 6);
 	intel_dp->psr.dc3co_exit_delay = val;
+	intel_dp->psr.dc3co_exitline = crtc_state->dc3co_exitline;
 	intel_dp->psr.psr2_sel_fetch_enabled = crtc_state->enable_psr2_sel_fetch;
 
 	/*
@@ -1818,7 +1818,7 @@ tgl_dc3co_flush(struct intel_dp *intel_dp, unsigned int frontbuffer_bits,
 {
 	mutex_lock(&intel_dp->psr.lock);
 
-	if (!intel_dp->psr.dc3co_enabled)
+	if (!intel_dp->psr.dc3co_exitline)
 		goto unlock;
 
 	if (!intel_dp->psr.psr2_enabled || !intel_dp->psr.active)