1/* SPDX-License-Identifier: GPL-2.0-only */
 2/*
 3 * Copyright (c) 2023 Qualcomm Innovation Center, Inc. All rights reserved
 4 *
 5 * Helper methods for MSM-specific DSC calculations that are common between timing engine,
 6 * DSI, and DP.
 7 */
 8
 9#ifndef MSM_DSC_HELPER_H_
10#define MSM_DSC_HELPER_H_
11
12#include <linux/math.h>
13#include <drm/display/drm_dsc_helper.h>
14
15/**
16 * msm_dsc_get_slices_per_intf() - calculate number of slices per interface
17 * @dsc: Pointer to drm dsc config struct
18 * @intf_width: interface width in pixels
19 * Returns: Integer representing the number of slices for the given interface
20 */
21static inline u32 msm_dsc_get_slices_per_intf(const struct drm_dsc_config *dsc, u32 intf_width)
22{
23	return DIV_ROUND_UP(intf_width, dsc->slice_width);
24}
25
26/**
27 * msm_dsc_get_bytes_per_line() - calculate bytes per line
28 * @dsc: Pointer to drm dsc config struct
29 * Returns: Integer value representing bytes per line. DSI and DP need
30 *          to perform further calculations to turn this into pclk_per_intf,
31 *          such as dividing by different values depending on if widebus is enabled.
32 */
33static inline u32 msm_dsc_get_bytes_per_line(const struct drm_dsc_config *dsc)
34{
35	return dsc->slice_count * dsc->slice_chunk_size;
36}
37
38#endif /* MSM_DSC_HELPER_H_ */