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 */ msm_dsc_get_slices_per_intf(const struct drm_dsc_config * dsc,u32 intf_width)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 */ msm_dsc_get_bytes_per_line(const struct drm_dsc_config * dsc)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_ */ 39