linux-kernel - [PATCH] drm: fix setting of plane_mask in pan_display

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Message-Id: <1590205747-19599-1-git-send-email-chenxb_99091@126.com>
Date:   Sat, 23 May 2020 11:49:07 +0800
From:   chenxb_99091@....com
To:     David Airlie <airlied@...ux.ie>
Cc:     dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        Xuebing Chen <chenxb_99091@....com>
Subject: [PATCH] drm: fix setting of plane_mask in pan_display_atomic()  function for linux-4.4

From: Xuebing Chen <chenxb_99091@....com>

The <include/drm/drm_crtc.h> provides drm_for_each_plane_mask macro and
plane_mask is defined as bitmask of plane indices, such as
1<<drm_plane_index(plane). This patch fixes error setting of plane_mask
in pan_display_atomic() function.

Signed-off-by: Xuebing Chen <chenxb_99091@....com>
---
 drivers/gpu/drm/drm_fb_helper.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/drm_fb_helper.c b/drivers/gpu/drm/drm_fb_helper.c
index e449f22..6a9f7ee 100644
--- a/drivers/gpu/drm/drm_fb_helper.c
+++ b/drivers/gpu/drm/drm_fb_helper.c
@@ -1256,7 +1256,7 @@ retry:
 			goto fail;
 
 		plane = mode_set->crtc->primary;
-		plane_mask |= drm_plane_index(plane);
+		plane_mask |= 1 << drm_plane_index(plane);
 		plane->old_fb = plane->fb;
 	}
 
-- 
2.7.4