Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit d09c23de authored by Zhao Yakui's avatar Zhao Yakui Committed by Eric Anholt
Browse files

drm/i915: Add 30ms delay to make SDVO TV detection reliable. 

Without this, on some boots the TV wouldn't be detected.  Testing
showed 15ms to be insufficient.

https://bugs.freedesktop.org/show_bug.cgi?id=24290
https://bugs.freedesktop.org/show_bug.cgi?id=20785



Signed-off-by: default avatarZhao Yakui <yakui.zhao@intel.com>
Tested-by: default avatarYan Seiner <yan@seiner.com>
Signed-off-by: default avatarEric Anholt <eric@anholt.net>
parent 04b2d218

drivers/gpu/drm/i915/intel_sdvo.c

+4 −0
Original line number Diff line number Diff line
@@ -1617,6 +1617,10 @@ static enum drm_connector_status intel_sdvo_detect(struct drm_connector *connect 


	intel_sdvo_write_cmd(intel_output,

			     SDVO_CMD_GET_ATTACHED_DISPLAYS, NULL, 0);

	if (sdvo_priv->is_tv) {

		/* add 30ms delay when the output type is SDVO-TV */

		mdelay(30);

	}

	status = intel_sdvo_read_response(intel_output, &response, 2);



	DRM_DEBUG_KMS("SDVO response %d %d\n", response & 0xff, response >> 8);