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

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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.

Cc: stable@vger.kernel.org
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 4e1c63e376)
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
This commit is contained in:
Jani Nikula 2016-02-04 12:50:50 +02:00
parent 4db3a2448e
commit 26f6f2d301
1 changed files with 1 additions and 1 deletions
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2
drivers/gpu/drm/i915/intel_dsi_panel_vbt.c
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@ -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);