drivers/gpu/drm/amd/display/dc/dml/calcs/dcn_calc_auto.c

Source file repositories/reference/linux-study-clean/drivers/gpu/drm/amd/display/dc/dml/calcs/dcn_calc_auto.c

File Facts

System
Linux kernel
Corpus path
drivers/gpu/drm/amd/display/dc/dml/calcs/dcn_calc_auto.c
Extension
.c
Size
115329 bytes
Lines
1730
Domain
Driver Families
Bucket
drivers/gpu
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

if (v->allow_different_hratio_vratio == dcn_bw_yes) {
			if (v->source_scan[k] == dcn_bw_hor) {
				v->h_ratio[k] = v->viewport_width[k] / v->scaler_rec_out_width[k];
				v->v_ratio[k] = v->viewport_height[k] / v->scaler_recout_height[k];
			} else {
				v->h_ratio[k] = v->viewport_height[k] / v->scaler_rec_out_width[k];
				v->v_ratio[k] = v->viewport_width[k] / v->scaler_recout_height[k];
			}
		} else {
			if (v->source_scan[k] == dcn_bw_hor) {
				v->h_ratio[k] = dcn_bw_max2(v->viewport_width[k] / v->scaler_rec_out_width[k], v->viewport_height[k] / v->scaler_recout_height[k]);
			} else {
				v->h_ratio[k] = dcn_bw_max2(v->viewport_height[k] / v->scaler_rec_out_width[k], v->viewport_width[k] / v->scaler_recout_height[k]);
			}
			v->v_ratio[k] = v->h_ratio[k];
		}
		if (v->interlace_output[k] == 1.0f) {
			v->v_ratio[k] = 2.0f * v->v_ratio[k];
		}
		if (v->underscan_output[k] == 1.0f) {
			v->h_ratio[k] = v->h_ratio[k] * v->under_scan_factor;
			v->v_ratio[k] = v->v_ratio[k] * v->under_scan_factor;
		}
	}
	/*scaler taps calculation*/

	for (k = 0; k <= v->number_of_active_planes - 1; k++) {
		if (v->h_ratio[k] > 1.0f) {
			v->acceptable_quality_hta_ps = dcn_bw_min2(v->max_hscl_taps, 2.0f * dcn_bw_ceil2(v->h_ratio[k], 1.0f));
		} else if (v->h_ratio[k] < 1.0f) {
			v->acceptable_quality_hta_ps = 4.0f;
		} else {
			v->acceptable_quality_hta_ps = 1.0f;
		}
		if (v->ta_pscalculation == dcn_bw_override) {
			v->htaps[k] = v->override_hta_ps[k];
		} else {
			v->htaps[k] = v->acceptable_quality_hta_ps;
		}
		if (v->v_ratio[k] > 1.0f) {
			v->acceptable_quality_vta_ps = dcn_bw_min2(v->max_vscl_taps, 2.0f * dcn_bw_ceil2(v->v_ratio[k], 1.0f));
		} else if (v->v_ratio[k] < 1.0f) {
			v->acceptable_quality_vta_ps = 4.0f;
		} else {
			v->acceptable_quality_vta_ps = 1.0f;
		}
		if (v->ta_pscalculation == dcn_bw_override) {
			v->vtaps[k] = v->override_vta_ps[k];
		} else {
			v->vtaps[k] = v->acceptable_quality_vta_ps;
		}
		if (v->source_pixel_format[k] == dcn_bw_rgb_sub_64 || v->source_pixel_format[k] == dcn_bw_rgb_sub_32 || v->source_pixel_format[k] == dcn_bw_rgb_sub_16) {
			v->vta_pschroma[k] = 0.0f;
			v->hta_pschroma[k] = 0.0f;
		} else {
			if (v->ta_pscalculation == dcn_bw_override) {
				v->vta_pschroma[k] = v->override_vta_pschroma[k];
				v->hta_pschroma[k] = v->override_hta_pschroma[k];
			} else {
				v->vta_pschroma[k] = v->acceptable_quality_vta_ps;
				v->hta_pschroma[k] = v->acceptable_quality_hta_ps;
			}
		}
	}
}

void mode_support_and_system_configuration(struct dcn_bw_internal_vars *v)
{
	int i;
	int j;
	int k;
	/*mode support, voltage state and soc configuration*/

	/*scale ratio support check*/

	v->scale_ratio_support = dcn_bw_yes;
	for (k = 0; k <= v->number_of_active_planes - 1; k++) {
		if (v->h_ratio[k] > v->max_hscl_ratio || v->v_ratio[k] > v->max_vscl_ratio || v->h_ratio[k] > v->htaps[k] || v->v_ratio[k] > v->vtaps[k] || (v->source_pixel_format[k] != dcn_bw_rgb_sub_64 && v->source_pixel_format[k] != dcn_bw_rgb_sub_32 && v->source_pixel_format[k] != dcn_bw_rgb_sub_16 && (v->h_ratio[k] / 2.0f > v->hta_pschroma[k] || v->v_ratio[k] / 2.0f > v->vta_pschroma[k]))) {
			v->scale_ratio_support = dcn_bw_no;
		}
	}
	/*source format, pixel format and scan support check*/

	v->source_format_pixel_and_scan_support = dcn_bw_yes;
	for (k = 0; k <= v->number_of_active_planes - 1; k++) {
		if ((v->source_surface_mode[k] == dcn_bw_sw_linear && v->source_scan[k] != dcn_bw_hor) || ((v->source_surface_mode[k] == dcn_bw_sw_4_kb_d || v->source_surface_mode[k] == dcn_bw_sw_4_kb_d_x || v->source_surface_mode[k] == dcn_bw_sw_64_kb_d || v->source_surface_mode[k] == dcn_bw_sw_64_kb_d_t || v->source_surface_mode[k] == dcn_bw_sw_64_kb_d_x || v->source_surface_mode[k] == dcn_bw_sw_var_d || v->source_surface_mode[k] == dcn_bw_sw_var_d_x) && v->source_pixel_format[k] != dcn_bw_rgb_sub_64)) {
			v->source_format_pixel_and_scan_support = dcn_bw_no;
		}
	}
	/*bandwidth support check*/

Annotation

Implementation Notes