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drm/i915/dsi: be defensive about out of bounds sequence id

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Untie the VBT based generic panel driver from the VBT parsing, so that
the two don't have to be updated in lockstep.

Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/7a6e3e7c4404c0e4dbcf003acd8737a6ecbe218f.1450702954.git.jani.nikula@intel.com
This commit is contained in:
Jani Nikula 2015-12-21 15:10:58 +02:00
parent 8d3ed2f313
commit 5cda0d20f9
1 changed files with 15 additions and 7 deletions
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22
drivers/gpu/drm/i915/intel_dsi_panel_vbt.c
View file

@ -246,14 +246,21 @@ static const fn_mipi_elem_exec exec_elem[] = {
*/
static const char * const seq_name[] = {
"UNDEFINED",
"MIPI_SEQ_ASSERT_RESET",
"MIPI_SEQ_INIT_OTP",
"MIPI_SEQ_DISPLAY_ON",
"MIPI_SEQ_DISPLAY_OFF",
"MIPI_SEQ_DEASSERT_RESET"
[MIPI_SEQ_ASSERT_RESET] = "MIPI_SEQ_ASSERT_RESET",
[MIPI_SEQ_INIT_OTP] = "MIPI_SEQ_INIT_OTP",
[MIPI_SEQ_DISPLAY_ON] = "MIPI_SEQ_DISPLAY_ON",
[MIPI_SEQ_DISPLAY_OFF] = "MIPI_SEQ_DISPLAY_OFF",
[MIPI_SEQ_DEASSERT_RESET] = "MIPI_SEQ_DEASSERT_RESET",
};
static const char *sequence_name(enum mipi_seq seq_id)
{
if (seq_id < ARRAY_SIZE(seq_name) && seq_name[seq_id])
return seq_name[seq_id];
else
return "(unknown)";
}
static void generic_exec_sequence(struct intel_dsi *intel_dsi, const u8 *data)
{
fn_mipi_elem_exec mipi_elem_exec;
@ -262,7 +269,8 @@ static void generic_exec_sequence(struct intel_dsi *intel_dsi, const u8 *data)
if (!data)
return;
DRM_DEBUG_DRIVER("Starting MIPI sequence - %s\n", seq_name[*data]);
DRM_DEBUG_DRIVER("Starting MIPI sequence %u - %s\n",
*data, sequence_name(*data));
/* go to the first element of the sequence */
data++;