Commit 222d0fa4 authored Feb 04, 2016 by Jani Nikula Committed by Greg Kroah-Hartman Mar 03, 2016

drm/i915/dsi: don't pass arbitrary data to sideband



commit 26f6f2d301c1fb46acb1138ee155125815239b0d upstream.

Since sequence block v2 the second byte contains flags other than just
pull up/down. Don't pass arbitrary data to the sideband interface.

The rest may or may not work for sequence block v2, but there should be
no harm done.

Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/ebe3c2eee623afc4b3a134533b01f8d591d13f32.1454582914.git.jani.nikula@intel.com


(cherry picked from commit 4e1c63e3761b84ec7d87c75b58bbc8bcf18e98ee)
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

parent 7a35478f

drivers/gpu/drm/i915/intel_dsi_panel_vbt.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -207,7 +207,7 @@ static const u8 mipi_exec_gpio(struct intel_dsi intel_dsi, const u8 *data)
		gpio = *data++;

		/* pull up/down */
		action = *data++;
		action = *data++ & 1;

		if (gpio >= ARRAY_SIZE(gtable)) {
		DRM_DEBUG_KMS("unknown gpio %u\n", gpio);