disp: msm: use upstream dsc config data

This change enforces dp, dsi and the sde drivers to use the
drm framework defined dsc_config data structure. As a part of this,
it introduces the sde_dsc_helper API to configure the dsc params
and creating a PPS command. Earlier each driver implemented it's
private versions leading to duplication of code. Additionaly the
helper api supports DSC spec 1.2 422 and 420 mode.

Change-Id: I25933fab08cdabbc6787079926885d1a78945e97
Signed-off-by: Abhijit Kulkarni <kabhijit@codeaurora.org>

msm/sde_dsc_helper.h

@@ -0,0 +1,22 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) 2020 The Linux Foundation. All rights reserved.
+ */
+
+#ifndef __SDE_DSC_HELPER_H__
+#define __SDE_DSC_HELPER_H__
+
+#include "msm_drv.h"
+
+#define DSC_1_1_PPS_PARAMETER_SET_ELEMENTS   88
+
+int sde_dsc_populate_dsc_config(struct drm_dsc_config *dsc, int scr_ver);
+
+int sde_dsc_populate_dsc_private_params(struct msm_display_dsc_info *dsc_info,
+		int intf_width);
+
+int sde_dsc_create_pps_buf_cmd(struct msm_display_dsc_info *dsc_info,
+		char *buf, int pps_id, u32 len);
+
+#endif /* __SDE_DSC_HELPER_H__ */
+