disp: msm: sde: right only pu support

This change add right only pu support by allowing the dsc to be
flushed when one of the dsc is getting disabled. Since the crtc
swaps the mixers in case of right only partial update, this change
fixes the active display mask passed to encoder so that always the
left only dsc gets programmed. This change also fixes layer mixer
configuration where only one layer mixer is driving the partial
update, the other mixer's configuration is disabled.

Change-Id: I2dd2e9a347797bfe07c90e0ca7f999d151fba933
Signed-off-by: Abhijit Kulkarni <kabhijit@codeaurora.org>

msm/sde/sde_crtc.c

@@ -896,9 +896,12 @@ static u32 _sde_crtc_get_displays_affected(struct drm_crtc *crtc,
 			disp_bitmask = BIT(1);		/* right only */
 		else
 			disp_bitmask = BIT(0) | BIT(1); /* left and right */
+	} else if (sde_crtc->mixers_swapped) {
+		disp_bitmask = BIT(0);
 	} else {
 		for (i = 0; i < sde_crtc->num_mixers; i++) {
-			if (!sde_kms_rect_is_null(&crtc_state->lm_roi[i]))
+			if (!sde_kms_rect_is_null(
+					&crtc_state->lm_roi[i]))
 				disp_bitmask |= BIT(i);
 		}
 	}
@@ -1113,7 +1116,7 @@ static void _sde_crtc_program_lm_output_roi(struct drm_crtc *crtc)
 	struct sde_crtc_state *crtc_state;
 	const struct sde_rect *lm_roi;
 	struct sde_hw_mixer *hw_lm;
-	bool right_mixer;
+	bool right_mixer = false;
 	int lm_idx;
 
 	if (!crtc)
@@ -1127,15 +1130,13 @@ static void _sde_crtc_program_lm_output_roi(struct drm_crtc *crtc)
 
 		lm_roi = &crtc_state->lm_roi[lm_idx];
 		hw_lm = sde_crtc->mixers[lm_idx].hw_lm;
-		right_mixer = lm_idx % MAX_MIXERS_PER_LAYOUT;
+		if (!sde_crtc->mixers_swapped)
+			right_mixer = lm_idx % MAX_MIXERS_PER_LAYOUT;
 
 		SDE_EVT32(DRMID(crtc_state->base.crtc), lm_idx,
 				lm_roi->x, lm_roi->y, lm_roi->w, lm_roi->h,
 				right_mixer);
 
-		if (sde_kms_rect_is_null(lm_roi))
-			continue;
-
 		hw_lm->cfg.out_width = lm_roi->w;
 		hw_lm->cfg.out_height = lm_roi->h;
 		hw_lm->cfg.right_mixer = right_mixer;
@@ -1664,13 +1665,8 @@ static void _sde_crtc_blend_setup(struct drm_crtc *crtc,
 		ctl = mixer[i].hw_ctl;
 		lm = mixer[i].hw_lm;
 
-		if (sde_kms_rect_is_null(lm_roi)) {
-			SDE_DEBUG(
-				"%s: lm%d leave ctl%d mask 0 since null roi\n",
-					sde_crtc->name, lm->idx - LM_0,
-					ctl->idx - CTL_0);
-			continue;
-		}
+		if (sde_kms_rect_is_null(lm_roi))
+			sde_crtc->mixers[i].mixer_op_mode = 0;
 
 		lm->ops.setup_alpha_out(lm, mixer[i].mixer_op_mode);
 
@@ -1684,8 +1680,17 @@ static void _sde_crtc_blend_setup(struct drm_crtc *crtc,
 			ctl->idx - CTL_0,
 			cfg.pending_flush_mask);
 
-		ctl->ops.setup_blendstage(ctl, mixer[i].hw_lm->idx,
-				&sde_crtc->stage_cfg[lm_layout]);
+		if (sde_kms_rect_is_null(lm_roi)) {
+			SDE_DEBUG(
+				"%s: lm%d leave ctl%d mask 0 since null roi\n",
+					sde_crtc->name, lm->idx - LM_0,
+					ctl->idx - CTL_0);
+			ctl->ops.setup_blendstage(ctl, mixer[i].hw_lm->idx,
+					NULL);
+		} else {
+			ctl->ops.setup_blendstage(ctl, mixer[i].hw_lm->idx,
+					&sde_crtc->stage_cfg[lm_layout]);
+		}
 	}
 
 	_sde_crtc_program_lm_output_roi(crtc);