From 546892a2249d208a1325cc521e6041694b863058 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jouni=20H=C3=B6gander?= <jouni.hogander@intel.com>
Date: Thu, 21 Oct 2021 13:10:23 +0300
Subject: drm/i915/display: Add initial selective fetch support for biplanar
 formats
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Git-commit: 3809991ff5f461cabccd9b5aa39f7561f10918b5
Patch-mainline: v5.17-rc1
References: jsc#PED-1166 jsc#PED-1168 jsc#PED-1170 jsc#PED-1218 jsc#PED-1220 jsc#PED-1222 jsc#PED-1223 jsc#PED-1225

Biplanar formats are using two planes (Y and UV). This patch adds handling
of Y selective fetch area by utilizing existing linked plane mechanism.
Also UV plane Y offset configuration is modified according to Bspec.

Signed-off-by: Jouni Högander <jouni.hogander@intel.com>
Reviewed-by: José Roberto de Souza <jose.souza@intel.com>
Signed-off-by: José Roberto de Souza <jose.souza@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20211021101024.13112-2-jouni.hogander@intel.com
Acked-by: Patrik Jakobsson <pjakobsson@suse.de>
---
 drivers/gpu/drm/i915/display/intel_psr.c | 30 +++++++++++++++++++++---
 1 file changed, 27 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_psr.c b/drivers/gpu/drm/i915/display/intel_psr.c
index 33b50646b9c9..bdbb5ed84f93 100644
--- a/drivers/gpu/drm/i915/display/intel_psr.c
+++ b/drivers/gpu/drm/i915/display/intel_psr.c
@@ -1469,10 +1469,19 @@ void intel_psr2_program_plane_sel_fetch(struct intel_plane *plane,
 	val |= plane_state->uapi.dst.x1;
 	intel_de_write_fw(dev_priv, PLANE_SEL_FETCH_POS(pipe, plane->id), val);
 
-	/* TODO: consider auxiliary surfaces */
-	x = plane_state->uapi.src.x1 >> 16;
-	y = (plane_state->uapi.src.y1 >> 16) + clip->y1;
+	x = plane_state->view.color_plane[color_plane].x;
+
+	/*
+	 * From Bspec: UV surface Start Y Position = half of Y plane Y
+	 * start position.
+	 */
+	if (!color_plane)
+		y = plane_state->view.color_plane[color_plane].y + clip->y1;
+	else
+		y = plane_state->view.color_plane[color_plane].y + clip->y1 / 2;
+
 	val = y << 16 | x;
+
 	intel_de_write_fw(dev_priv, PLANE_SEL_FETCH_OFFSET(pipe, plane->id),
 			  val);
 
@@ -1702,6 +1711,7 @@ int intel_psr2_sel_fetch_update(struct intel_atomic_state *state,
 	for_each_oldnew_intel_plane_in_state(state, plane, old_plane_state,
 					     new_plane_state, i) {
 		struct drm_rect *sel_fetch_area, inter;
+		struct intel_plane *linked = new_plane_state->planar_linked_plane;
 
 		if (new_plane_state->uapi.crtc != crtc_state->uapi.crtc ||
 		    !new_plane_state->uapi.visible)
@@ -1720,6 +1730,20 @@ int intel_psr2_sel_fetch_update(struct intel_atomic_state *state,
 		sel_fetch_area->y1 = inter.y1 - new_plane_state->uapi.dst.y1;
 		sel_fetch_area->y2 = inter.y2 - new_plane_state->uapi.dst.y1;
 		crtc_state->update_planes |= BIT(plane->id);
+
+		/*
+		 * Sel_fetch_area is calculated for UV plane. Use
+		 * same area for Y plane as well.
+		 */
+		if (linked) {
+			struct intel_plane_state *linked_new_plane_state =
+			  intel_atomic_get_new_plane_state(state, linked);
+			struct drm_rect *linked_sel_fetch_area =
+			  &linked_new_plane_state->psr2_sel_fetch_area;
+
+			linked_sel_fetch_area->y1 = sel_fetch_area->y1;
+			linked_sel_fetch_area->y2 = sel_fetch_area->y2;
+		}
 	}
 
 skip_sel_fetch_set_loop:
-- 
2.38.1