On Thu, Feb 04, 2016 at 12:50:50PM +0200, Jani Nikula wrote:
> 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@xxxxxxxxxxxxxxx
> Signed-off-by: Jani Nikula <jani.nikula@xxxxxxxxx>
Reviewed-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
well, as far as it can be reviewed with the crappy specs.
> ---
> drivers/gpu/drm/i915/intel_dsi_panel_vbt.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/i915/intel_dsi_panel_vbt.c b/drivers/gpu/drm/i915/intel_dsi_panel_vbt.c
> index 4775aa5462e8..6f013efba45b 100644
> --- a/drivers/gpu/drm/i915/intel_dsi_panel_vbt.c
> +++ b/drivers/gpu/drm/i915/intel_dsi_panel_vbt.c
> @@ -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);
> --
> 2.1.4
>
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--
Ville Syrjälä
Intel OTC
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