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/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Copyright (c) 2023 Qualcomm Innovation Center, Inc. All rights reserved
*
* Helper methods for MSM-specific DSC calculations that are common between timing engine,
* DSI, and DP.
*/
#ifndef MSM_DSC_HELPER_H_
#define MSM_DSC_HELPER_H_
#include <linux/math.h>
#include <drm/display/drm_dsc_helper.h>
/**
* msm_dsc_get_slices_per_intf() - calculate number of slices per interface
* @dsc: Pointer to drm dsc config struct
* @intf_width: interface width in pixels
* Returns: Integer representing the number of slices for the given interface
*/
static inline u32 msm_dsc_get_slices_per_intf(const struct drm_dsc_config *dsc, u32 intf_width)
{
return DIV_ROUND_UP(intf_width, dsc->slice_width);
}
/**
* msm_dsc_get_bytes_per_line() - calculate bytes per line
* @dsc: Pointer to drm dsc config struct
* Returns: Integer value representing bytes per line. DSI and DP need
* to perform further calculations to turn this into pclk_per_intf,
* such as dividing by different values depending on if widebus is enabled.
*/
static inline u32 msm_dsc_get_bytes_per_line(const struct drm_dsc_config *dsc)
{
return dsc->slice_count * dsc->slice_chunk_size;
}
#endif /* MSM_DSC_HELPER_H_ */
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