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drm/ast: fixed cursor may disappear sometimes

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commit 7989b9ee8bafe5cc625381dd0c3c4586de27ca26 upstream.

Signed-off-by: Y.C. Chen <yc_chen@aspeedtech.com>
Cc: <stable@vger.kernel.org>
Reviewed-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Y.C. Chen 2018-10-30 11:34:46 +08:00 committed by Greg Kroah-Hartman
parent e9d2c0fbe1
commit 80142af39b
1 changed files with 1 additions and 1 deletions
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2
drivers/gpu/drm/ast/ast_mode.c
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@ -1255,7 +1255,7 @@ static int ast_cursor_move(struct drm_crtc *crtc,
ast_set_index_reg(ast, AST_IO_CRTC_PORT, 0xc7, ((y >> 8) & 0x07));
/* dummy write to fire HWC */
ast_set_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xCB, 0xFF, 0x00);
ast_show_cursor(crtc);
return 0;
}