diff options
author | Jessica Zhang <quic_jesszhan@quicinc.com> | 2023-05-24 10:45:18 -0700 |
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committer | Dmitry Baryshkov <dmitry.baryshkov@linaro.org> | 2023-06-15 12:58:56 +0300 |
commit | b50f06f83e0e859d93bd7bb80a2d1911f2dc176b (patch) | |
tree | 0714a7730237e42f697956e1aaca0cba08c1df6e /drivers/gpu/drm/msm | |
parent | 49fd30a7153be027b7ae9895e9061dec15e836f7 (diff) |
drm/msm: Add MSM-specific DSC helper methods
Introduce MSM-specific DSC helper methods, as some calculations are
common between DP and DSC.
Reviewed-by: Marijn Suijten <marijn.suijten@somainline.org>
Signed-off-by: Jessica Zhang <quic_jesszhan@quicinc.com>
Patchwork: https://patchwork.freedesktop.org/patch/539272/
Link: https://lore.kernel.org/r/20230329-rfc-msm-dsc-helper-v14-5-bafc7be95691@quicinc.com
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Diffstat (limited to 'drivers/gpu/drm/msm')
-rw-r--r-- | drivers/gpu/drm/msm/msm_dsc_helper.h | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/drivers/gpu/drm/msm/msm_dsc_helper.h b/drivers/gpu/drm/msm/msm_dsc_helper.h new file mode 100644 index 000000000000..b9049fe1e279 --- /dev/null +++ b/drivers/gpu/drm/msm/msm_dsc_helper.h @@ -0,0 +1,38 @@ +/* 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_ */ |