OMAPFB: clear framebuffers with CPU

Currently vram.c clears the allocated memory automatically using OMAP
system DMA. In an effort to reduce OMAP dependencies, we'll do the
memory clear with CPU from now on.

This patch implements clearing of the framebuffer in omapfb, using
cfb_fillrect() to do the actual clear.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

diff --git a/drivers/video/omap2/omapfb/omapfb-main.c b/drivers/video/omap2/omapfb/omapfb-main.c
index fc671d3d8004899ba36064954fc1343ddefb85e2..7afdfcf3bac85b7a86c95a2962fdd2051a7f6afb 100644 (file)
--- a/drivers/video/omap2/omapfb/omapfb-main.c
+++ b/drivers/video/omap2/omapfb/omapfb-main.c
@@ -1592,6 +1592,20 @@ static int omapfb_allocate_all_fbs(struct omapfb2_device *fbdev)
        return 0;
 }
 
+static void omapfb_clear_fb(struct fb_info *fbi)
+{
+       const struct fb_fillrect rect = {
+               .dx = 0,
+               .dy = 0,
+               .width = fbi->var.xres_virtual,
+               .height = fbi->var.yres_virtual,
+               .color = 0,
+               .rop = ROP_COPY,
+       };
+
+       cfb_fillrect(fbi, &rect);
+}
+
 int omapfb_realloc_fbmem(struct fb_info *fbi, unsigned long size, int type)
 {
        struct omapfb_info *ofbi = FB2OFB(fbi);
@@ -1661,6 +1675,8 @@ int omapfb_realloc_fbmem(struct fb_info *fbi, unsigned long size, int type)
                        goto err;
        }
 
+       omapfb_clear_fb(fbi);
+
        return 0;
 err:
        omapfb_free_fbmem(fbi);
@@ -1972,6 +1988,16 @@ static int omapfb_create_framebuffers(struct omapfb2_device *fbdev)
                }
        }
 
+       for (i = 0; i < fbdev->num_fbs; i++) {
+               struct fb_info *fbi = fbdev->fbs[i];
+               struct omapfb_info *ofbi = FB2OFB(fbi);
+
+               if (ofbi->region->size == 0)
+                       continue;
+
+               omapfb_clear_fb(fbi);
+       }
+
        /* Enable fb0 */
        if (fbdev->num_fbs > 0) {
                struct omapfb_info *ofbi = FB2OFB(fbdev->fbs[0]);