Merge "disp: msm: dp: Ensure peak pxl rate does not exceed maximum supported by sink" (3c4d5f35) · Commits · e / devices / android_kernel_fairphone_FP5

msm/dp/dp_panel.c

+43 −3

Original line number	Diff line number	Diff line
		@@ -1522,6 +1522,11 @@ struct dp_dsc_slices_per_line {
		u8 num_slices;
		};

		struct dp_dsc_peak_throughput {
		u32 index;
		u32 peak_throughput;
		};

		struct dp_dsc_slices_per_line slice_per_line_tbl[] = {
		{0, 340, 1 },
		{340, 680, 2 },
		@@ -1533,6 +1538,24 @@ struct dp_dsc_slices_per_line slice_per_line_tbl[] = {
		{8000, 9600, 24 }
		};

		const struct dp_dsc_peak_throughput peak_throughput_mode_0_tbl[] = {
		{0, 0},
		{1, 340},
		{2, 400},
		{3, 450},
		{4, 500},
		{5, 550},
		{6, 600},
		{7, 650},
		{8, 700},
		{9, 750},
		{10, 800},
		{11, 850},
		{12, 900},
		{13, 950},
		{14, 1000},
		};

		static int dp_panel_dsc_prepare_basic_params(
		struct msm_compression_info *comp_info,
		const struct dp_display_mode *dp_mode,
		@@ -1540,9 +1563,13 @@ static int dp_panel_dsc_prepare_basic_params(
		{
		int i;
		struct dp_dsc_slices_per_line *rec;
		int slice_width;
		const struct dp_dsc_peak_throughput *tput;
		u32 slice_width;
		u32 ppr = dp_mode->timing.pixel_clk_khz/1000;
		int max_slice_width;
		u32 max_slice_width;
		u32 ppr_max_index;
		u32 peak_throughput;
		u32 ppr_per_slice;

		comp_info->dsc_info.slice_per_pkt = 0;
		for (i = 0; i < ARRAY_SIZE(slice_per_line_tbl); i++) {
		@@ -1557,11 +1584,23 @@ static int dp_panel_dsc_prepare_basic_params(
		if (comp_info->dsc_info.slice_per_pkt == 0)
		return -EINVAL;

		ppr_max_index = dp_panel->dsc_dpcd[11] &= 0xf;
		if (!ppr_max_index \|\| ppr_max_index >= 15) {
		pr_debug("Throughput mode 0 not supported");
		return -EINVAL;
		}

		tput = &peak_throughput_mode_0_tbl[ppr_max_index];
		peak_throughput = tput->peak_throughput;

		max_slice_width = dp_panel->dsc_dpcd[12] * 320;
		slice_width = (dp_mode->timing.h_active /
		comp_info->dsc_info.slice_per_pkt);

		while (slice_width >= max_slice_width) {
		ppr_per_slice = ppr/comp_info->dsc_info.slice_per_pkt;

		while (slice_width >= max_slice_width \|\|
		ppr_per_slice > peak_throughput) {
		if (i == ARRAY_SIZE(slice_per_line_tbl))
		return -EINVAL;

		@@ -1569,6 +1608,7 @@ static int dp_panel_dsc_prepare_basic_params(
		comp_info->dsc_info.slice_per_pkt = rec->num_slices;
		slice_width = (dp_mode->timing.h_active /
		comp_info->dsc_info.slice_per_pkt);
		ppr_per_slice = ppr/comp_info->dsc_info.slice_per_pkt;
		i++;
		}