Merge "disp: msm: dp: Implement dsc slice selection logic based on sink caps" (fc92a6d9) · Commits · e / devices / android_kernel_fairphone_FP5

msm/dp/dp_panel.c

+63 −3

Original line number	Diff line number	Diff line
		@@ -1527,7 +1527,12 @@ struct dp_dsc_peak_throughput {
		u32 peak_throughput;
		};

		struct dp_dsc_slices_per_line slice_per_line_tbl[] = {
		struct dp_dsc_slice_caps_bit_map {
		u32 num_slices;
		u32 bit_index;
		};

		const struct dp_dsc_slices_per_line slice_per_line_tbl[] = {
		{0, 340, 1 },
		{340, 680, 2 },
		{680, 1360, 4 },
		@@ -1556,13 +1561,54 @@ const struct dp_dsc_peak_throughput peak_throughput_mode_0_tbl[] = {
		{14, 1000},
		};

		const struct dp_dsc_slice_caps_bit_map slice_caps_bit_map_tbl[] = {
		{1, 0},
		{2, 1},
		{4, 3},
		{6, 4},
		{8, 5},
		{10, 6},
		{12, 7},
		{16, 0},
		{20, 1},
		{24, 2},
		};

		static bool dp_panel_check_slice_support(u32 num_slices, u32 raw_data_1,
		u32 raw_data_2)
		{
		const struct dp_dsc_slice_caps_bit_map *bcap;
		u32 raw_data;
		int i;

		if (num_slices <= 12)
		raw_data = raw_data_1;
		else
		raw_data = raw_data_2;

		for (i = 0; i < ARRAY_SIZE(slice_caps_bit_map_tbl); i++) {
		bcap = &slice_caps_bit_map_tbl[i];

		if (bcap->num_slices == num_slices) {
		raw_data &= (1 << bcap->bit_index);

		if (raw_data)
		return true;
		else
		return false;
		}
		}

		return false;
		}

		static int dp_panel_dsc_prepare_basic_params(
		struct msm_compression_info *comp_info,
		const struct dp_display_mode *dp_mode,
		struct dp_panel *dp_panel)
		{
		int i;
		struct dp_dsc_slices_per_line *rec;
		const struct dp_dsc_slices_per_line *rec;
		const struct dp_dsc_peak_throughput *tput;
		u32 slice_width;
		u32 ppr = dp_mode->timing.pixel_clk_khz/1000;
		@@ -1570,6 +1616,8 @@ static int dp_panel_dsc_prepare_basic_params(
		u32 ppr_max_index;
		u32 peak_throughput;
		u32 ppr_per_slice;
		u32 slice_caps_1;
		u32 slice_caps_2;

		comp_info->dsc_info.slice_per_pkt = 0;
		for (i = 0; i < ARRAY_SIZE(slice_per_line_tbl); i++) {
		@@ -1599,8 +1647,20 @@ static int dp_panel_dsc_prepare_basic_params(

		ppr_per_slice = ppr/comp_info->dsc_info.slice_per_pkt;

		slice_caps_1 = dp_panel->dsc_dpcd[4];
		slice_caps_2 = dp_panel->dsc_dpcd[13] & 0x7;

		/*
		* There are 3 conditions to check for sink support:
		* 1. The slice width cannot exceed the maximum.
		* 2. The ppr per slice cannot exceed the maximum.
		* 3. The number of slices must be explicitly supported.
		*/
		while (slice_width >= max_slice_width \|\|
		ppr_per_slice > peak_throughput) {
		ppr_per_slice > peak_throughput \|\|
		!dp_panel_check_slice_support(
		comp_info->dsc_info.slice_per_pkt, slice_caps_1,
		slice_caps_2)) {
		if (i == ARRAY_SIZE(slice_per_line_tbl))
		return -EINVAL;