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drm/udl: fix line iterator in damage handling

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The udl damage handler is supposed to render 'height' lines, but its
iterator has an obvious typo that makes it miss most lines if the
rectangle does not cover 0/0.

Fix the damage handler to correctly render all lines.

This is a fallout from:

    commit e375882406d0cc24030746638592004755ed4ae0
    Author: Noralf Trønnes <noralf@tronnes.org>
    Date:   Thu Apr 28 17:18:37 2016 +0200

        drm/udl: Use drm_fb_helper deferred_io support

Tested-by: poma <poma@gmail.com>
Cc: stable@vger.kernel.org # 4.7+
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: David Herrmann <dh.herrmann@gmail.com>
Reviewed-by: Eric Engestrom <eric.engestrom@imgtec.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
David Herrmann 2016-09-23 12:36:02 +02:00 committed by Dave Airlie
parent aaee1d1e2d
commit 90fd68dcf9
1 changed files with 1 additions and 1 deletions
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2
drivers/gpu/drm/udl/udl_fb.c
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@ -122,7 +122,7 @@ int udl_handle_damage(struct udl_framebuffer *fb, int x, int y,
return 0;
cmd = urb->transfer_buffer;
for (i = y; i < height ; i++) {
for (i = y; i < y + height ; i++) {
const int line_offset = fb->base.pitches[0] * i;
const int byte_offset = line_offset + (x * bpp);
const int dev_byte_offset = (fb->base.width * bpp * i) + (x * bpp);