3.2-stable review patch. If anyone has any objections, please let me know.
------------------ From: Torsten Duwe <tors...@lst.de> commit 16dad1d743d31a104a849c8944e6b9eb479f6cd7 upstream. EDID spreads some values across multiple bytes; bit-fiddling is needed to retrieve these. The current code to parse "detailed timings" has a cut&paste error that results in a vsync offset of at most 15 lines instead of 63. See http://en.wikipedia.org/wiki/EDID and in the "EDID Detailed Timing Descriptor" see bytes 10+11 show why that needs to be a left shift. Signed-off-by: Torsten Duwe <d...@lst.de> Signed-off-by: Linus Torvalds <torva...@linux-foundation.org> Signed-off-by: Ben Hutchings <b...@decadent.org.uk> --- drivers/gpu/drm/drm_edid.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/gpu/drm/drm_edid.c +++ b/drivers/gpu/drm/drm_edid.c @@ -852,7 +852,7 @@ static struct drm_display_mode *drm_mode unsigned vblank = (pt->vactive_vblank_hi & 0xf) << 8 | pt->vblank_lo; unsigned hsync_offset = (pt->hsync_vsync_offset_pulse_width_hi & 0xc0) << 2 | pt->hsync_offset_lo; unsigned hsync_pulse_width = (pt->hsync_vsync_offset_pulse_width_hi & 0x30) << 4 | pt->hsync_pulse_width_lo; - unsigned vsync_offset = (pt->hsync_vsync_offset_pulse_width_hi & 0xc) >> 2 | pt->vsync_offset_pulse_width_lo >> 4; + unsigned vsync_offset = (pt->hsync_vsync_offset_pulse_width_hi & 0xc) << 2 | pt->vsync_offset_pulse_width_lo >> 4; unsigned vsync_pulse_width = (pt->hsync_vsync_offset_pulse_width_hi & 0x3) << 4 | (pt->vsync_offset_pulse_width_lo & 0xf); /* ignore tiny modes */ -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
