/* 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_ */