drm/ast: Fix invalid usage of AST_MAX_HWC_WIDTH in cursor atomic_check

[ Upstream commit ee4a92d690f30f3793df942939726bec0338e65b ]

Use AST_MAX_HWC_HEIGHT for setting offset_y in the cursor plane's
atomic_check. The code used AST_MAX_HWC_WIDTH instead. This worked
because both constants has the same value.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Acked-by: Gerd Hoffmann <kraxel@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210209134632.12157-3-tzimmermann@suse.de
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/gpu/drm/ast/ast_mode.c b/drivers/gpu/drm/ast/ast_mode.c
index 9db371f4054f3c3996e569602d2f37d06863a5a6..c86ed2ffb725b8d89897d0aa0f355f420a64a664 100644 (file)
--- a/drivers/gpu/drm/ast/ast_mode.c
+++ b/drivers/gpu/drm/ast/ast_mode.c
@@ -688,7 +688,7 @@ ast_cursor_plane_helper_atomic_update(struct drm_plane *plane,
        unsigned int offset_x, offset_y;
 
        offset_x = AST_MAX_HWC_WIDTH - fb->width;
-       offset_y = AST_MAX_HWC_WIDTH - fb->height;
+       offset_y = AST_MAX_HWC_HEIGHT - fb->height;
 
        if (state->fb != old_state->fb) {
                /* A new cursor image was installed. */