linux-kernel - [PATCH v4 04/17] drm/rockchip: vop2: clear afbc en and transform bit for cluster window at linear mode

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Message-Id: <20231207080016.652051-1-andyshrk@163.com>
Date:   Thu,  7 Dec 2023 16:00:16 +0800
From:   Andy Yan <andyshrk@....com>
To:     heiko@...ech.de
Cc:     hjc@...k-chips.com, dri-devel@...ts.freedesktop.org,
        linux-rockchip@...ts.infradead.org, linux-kernel@...r.kernel.org,
        krzysztof.kozlowski+dt@...aro.org, robh+dt@...nel.org,
        devicetree@...r.kernel.org, sebastian.reichel@...labora.com,
        kever.yang@...k-chips.com, chris.obbard@...labora.com,
        Andy Yan <andy.yan@...k-chips.com>,
        Sascha Hauer <s.hauer@...gutronix.de>
Subject: [PATCH v4 04/17] drm/rockchip: vop2: clear afbc en and transform bit for cluster window at linear mode

From: Andy Yan <andy.yan@...k-chips.com>

The enable bit and transform offset of cluster windows should be
cleared when it work at linear mode, or we may have a iommu fault
issue on rk3588 which cluster windows switch between afbc and linear
mode.

As the cluster windows of rk3568 only supports afbc format
so is therefore not affected.

Signed-off-by: Andy Yan <andy.yan@...k-chips.com>
Reviewed-by: Sascha Hauer <s.hauer@...gutronix.de>
---

(no changes since v1)

 drivers/gpu/drm/rockchip/rockchip_drm_vop2.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_vop2.c b/drivers/gpu/drm/rockchip/rockchip_drm_vop2.c
index 639dfebc6bd1..a019cc9bbd54 100644
--- a/drivers/gpu/drm/rockchip/rockchip_drm_vop2.c
+++ b/drivers/gpu/drm/rockchip/rockchip_drm_vop2.c
@@ -1312,6 +1312,11 @@ static void vop2_plane_atomic_update(struct drm_plane *plane,
 		vop2_win_write(win, VOP2_WIN_AFBC_ROTATE_270, rotate_270);
 		vop2_win_write(win, VOP2_WIN_AFBC_ROTATE_90, rotate_90);
 	} else {
+		if (vop2_cluster_window(win)) {
+			vop2_win_write(win, VOP2_WIN_AFBC_ENABLE, 0);
+			vop2_win_write(win, VOP2_WIN_AFBC_TRANSFORM_OFFSET, 0);
+		}
+
 		vop2_win_write(win, VOP2_WIN_YRGB_VIR, DIV_ROUND_UP(fb->pitches[0], 4));
 	}
 
-- 
2.34.1