rk fb: fix the error vir_stride in hdmi fb if rotate

diff --git a/drivers/video/rockchip/rk_fb.c b/drivers/video/rockchip/rk_fb.c
index 804a3dfcd19507850ca27457f29a5607707109bd..ed1cd3c66dec29d2dc33b54bfd78dca4b6ebb29a 100755 (executable)
--- a/drivers/video/rockchip/rk_fb.c
+++ b/drivers/video/rockchip/rk_fb.c
@@ -1542,9 +1542,14 @@ static void rk_fb_update_reg(struct rk_lcdc_driver *dev_drv,
                }
 
                if (ext_win->area[0].xact < ext_win->area[0].yact) {
+                       int pixel_width, vir_width_bit, stride;
                        ext_win->area[0].xact = win->area[0].yact;
                        ext_win->area[0].yact = win->area[0].xact;
                        ext_win->area[0].xvir = win->area[0].yact;
+                       pixel_width = rk_fb_pixel_width(ext_win->format);
+                       vir_width_bit = pixel_width * ext_win->area[0].xvir;
+                       stride = ALIGN_N_TIMES(vir_width_bit, 32) / 8;
+                       ext_win->area[0].y_vir_stride = stride >> 2;
                }
 #if defined(CONFIG_FB_ROTATE) || !defined(CONFIG_THREE_FB_BUFFER)
                rk_fb_win_rotate(ext_win, win);