Add a simple function to pull the preferred mode out of an EDID block. This function is designed for use during Displayport compliance testing.
Signed-off-by: Todd Previte <[email protected]> --- drivers/gpu/drm/i915/intel_dp.c | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c index f61502e..6c8f222 100644 --- a/drivers/gpu/drm/i915/intel_dp.c +++ b/drivers/gpu/drm/i915/intel_dp.c @@ -3351,6 +3351,31 @@ static bool intel_dp_compute_edid_checksum(uint8_t *edid_data, uint8_t *edid_che return edid_ok; } +static struct drm_display_mode* +intel_dp_get_edid_preferred_mode(struct intel_dp *intel_dp) +{ + struct drm_display_mode *found_mode = NULL; + struct drm_connector *connector = &intel_dp->attached_connector->base; + int mode_count = 0; + + list_for_each_entry(found_mode, &connector->probed_modes, head) { + /* Check for a preferred mode */ + if (found_mode->type & DRM_MODE_TYPE_PREFERRED) { + /* Found the preferred mode, return it */ + DRM_DEBUG_KMS("Displayport: Found preferred mode '%s'\n", + found_mode->name); + goto exit_with_mode; + } + mode_count++; + } + /* No mode found, report the error */ + DRM_DEBUG_KMS("Displayport: Preferred mode not found in %d probed modes\n", + mode_count); + +exit_with_mode: + return found_mode; +} + /* Displayport compliance testing - Link training */ static uint8_t intel_dp_autotest_link_training(struct intel_dp *intel_dp) -- 1.9.1 _______________________________________________ Intel-gfx mailing list [email protected] http://lists.freedesktop.org/mailman/listinfo/intel-gfx
