Merge "drm/msm: scrambling not mandatory for DP interface"

/* Copyright (c) 2017-2019, The Linux Foundation. All rights reserved.

/* Copyright (c) 2017-2020, The Linux Foundation. All rights reserved.

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2 and

	else

		SDE_EDID_DEBUG("YCbCr420 CMDB is not present\n");

	/*

	 * As per HDMI 2.0 spec, a sink supporting any modes

	 * requiring more than 340Mhz clock rate should support

	 * SCDC as well. This is required because we need the SCDC

	 * channel to set the TMDS clock ratio. However in cases

	 * where the TV publishes such a mode in its list of modes

	 * but does not have SCDC support as per HDMI HFVSDB block

	 * remove RGB mode support from the flags. Currently, in

	 * the list of modes not having deep color support only RGB

	 * modes shall requre a clock of 340Mhz and above such as the

	 * 4K@60fps case. All other modes shall be YUV.

	 * Deep color case is handled separately while choosing the

	 * best mode in the _sde_hdmi_choose_best_format API where

	 * we enable deep color only if it satisfies both source and

	 * sink requirements. However, that API assumes that at least

	 * RGB mode is supported on the mode. Hence, it would be better

	 * to remove the format support flags while parsing the EDID

	 * itself if it doesn't satisfy the HDMI spec requirement.

	 */

	list_for_each_entry(mode, &connector->probed_modes, head) {

		if ((mode->clock > MIN_SCRAMBLER_REQ_RATE) &&

			!connector->scdc_present) {

			mode->flags &= ~DRM_MODE_FLAG_SUPPORTS_RGB;

			mode->flags &= ~DRM_MODE_FLAG_SUPPORTS_YUV422;

		}

	}

	SDE_EDID_DEBUG("%s -\n", __func__);

}