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drm/amd/display: Update DSC compute parameter calculation

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Adjust bytes per pixel calculation to use div_u64.

Signed-off-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Acked-by: Roman Li <roman.li@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Rodrigo Siqueira 2024-03-21 18:20:38 -06:00 committed by Alex Deucher
parent e7927b2914
commit ffa6d7ab1b
1 changed files with 3 additions and 4 deletions
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7
drivers/gpu/drm/amd/display/dc/dsc/rc_calc_dpi.c
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@ -101,7 +101,6 @@ int dscc_compute_dsc_parameters(const struct drm_dsc_config *pps,
{
int ret;
struct drm_dsc_config dsc_cfg;
unsigned long long tmp;
dsc_params->pps = *pps;
dsc_params->pps.initial_scale_value = 8 * rc->rc_model_size / (rc->rc_model_size - rc->initial_fullness_offset);
@ -112,9 +111,9 @@ int dscc_compute_dsc_parameters(const struct drm_dsc_config *pps,
dsc_cfg.mux_word_size = dsc_params->pps.bits_per_component <= 10 ? 48 : 64;
ret = drm_dsc_compute_rc_parameters(&dsc_cfg);
tmp = (unsigned long long)dsc_cfg.slice_chunk_size * 0x10000000 + (dsc_cfg.slice_width - 1);
do_div(tmp, (uint32_t)dsc_cfg.slice_width); //ROUND-UP
dsc_params->bytes_per_pixel = (uint32_t)tmp;
dsc_params->bytes_per_pixel =
(uint32_t)(div_u64(((uint64_t)dsc_cfg.slice_chunk_size * 0x10000000 + (dsc_cfg.slice_width - 1)),
(uint32_t)dsc_cfg.slice_width)); /* Round-up */
copy_pps_fields(&dsc_params->pps, &dsc_cfg);
dsc_params->rc_buffer_model_size = dsc_cfg.rc_bits;