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Commit 2954fb12 authored by Govinda Rajulu Chenna's avatar Govinda Rajulu Chenna Committed by Gerrit - the friendly Code Review server
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drm/msm/dp: update tu calculation for fec and dsc modes 



Update transfer unit calculator to support fec and dsc
configurations.

CRs-Fixed: 2325207
Change-Id: I0c01ef9c7021e3af778b51c63969d4224f0236d5
Signed-off-by: default avatarGovinda Rajulu Chenna <gchenna@codeaurora.org>
parent 52754a64

drivers/gpu/drm/msm/dp/dp_panel.c

+160 −64
Original line number Diff line number Diff line
@@ -112,7 +112,9 @@ struct tu_algo_data { 
	s64 lclk_fp;

	s64 pclk_fp;

	s64 lwidth;

	s64 lwidth_fp;

	s64 hbp_relative_to_pclk;

	s64 hbp_relative_to_pclk_fp;

	int nlanes;

	int bpp;

	int pixelEnc;
@@ -187,26 +189,150 @@ struct tu_algo_data { 


static int _tu_param_compare(s64 a, s64 b)

{

	u32 a_int, a_frac;

	u32 b_int, b_frac;

	u32 a_int, a_frac, a_sign;

	u32 b_int, b_frac, b_sign;

	s64 a_temp, b_temp, minus_1;



	if (a == b)

		return 0;



	minus_1 = drm_fixp_from_fraction(-1, 1);



	a_int = (a >> 32) & 0x7FFFFFFF;

	a_frac = a & 0xFFFFFFFF;

	a_sign = (a >> 32) & 0x80000000 ? 1 : 0;



	b_int = (b >> 32) & 0x7FFFFFFF;

	b_frac = b & 0xFFFFFFFF;

	b_sign = (b >> 32) & 0x80000000 ? 1 : 0;



	if (a_int > b_int)

		return 1;

	else if (a_int < b_int)

	if (a_sign > b_sign)

		return 2;

	else if (a_frac > b_frac)

	else if (b_sign > a_sign)

		return 1;



	if (!a_sign && !b_sign) { /* positive */

		if (a > b)

			return 1;

		else

			return 2;

	} else { /* negative */

		a_temp = drm_fixp_mul(a, minus_1);

		b_temp = drm_fixp_mul(b, minus_1);



		if (a_temp > b_temp)

			return 2;

		else

			return 1;

	}

}



static void dp_panel_update_tu_timings(struct dp_tu_calc_input *in,

					struct tu_algo_data *tu)

{

	int nlanes = in->nlanes;

	int dsc_num_slices = in->num_of_dsc_slices;

	int dsc_num_bytes  = 0;

	int numerator;

	s64 pclk_dsc_fp;

	s64 dwidth_dsc_fp;

	s64 hbp_dsc_fp;

	s64 overhead_dsc;



	int tot_num_eoc_symbols = 0;

	int tot_num_hor_bytes   = 0;

	int tot_num_dummy_bytes = 0;

	int dwidth_dsc_bytes    = 0;

	int  eoc_bytes           = 0;



	s64 temp1_fp, temp2_fp, temp3_fp;



	tu->lclk_fp              = drm_fixp_from_fraction(in->lclk, 1);

	tu->pclk_fp              = drm_fixp_from_fraction(in->pclk_khz, 1000);

	tu->lwidth               = in->hactive;

	tu->hbp_relative_to_pclk = in->hporch;

	tu->nlanes               = in->nlanes;

	tu->bpp                  = in->bpp;

	tu->pixelEnc             = in->pixel_enc;

	tu->dsc_en               = in->dsc_en;

	tu->async_en             = in->async_en;

	tu->lwidth_fp            = drm_fixp_from_fraction(in->hactive, 1);

	tu->hbp_relative_to_pclk_fp = drm_fixp_from_fraction(in->hporch, 1);



	if (tu->pixelEnc == 420) {

		temp1_fp = drm_fixp_from_fraction(2, 1);

		tu->pclk_fp = drm_fixp_div(tu->pclk_fp, temp1_fp);

		tu->lwidth_fp = drm_fixp_div(tu->lwidth_fp, temp1_fp);

		tu->hbp_relative_to_pclk_fp =

				drm_fixp_div(tu->hbp_relative_to_pclk_fp, 2);

	}



	if (tu->pixelEnc == 422) {

		switch (tu->bpp) {

		case 24:

			tu->bpp = 16;

			tu->bpc = 8;

			break;

		case 30:

			tu->bpp = 20;

			tu->bpc = 10;

			break;

		default:

			tu->bpp = 16;

			tu->bpc = 8;

			break;

		}

	} else {

		tu->bpc = tu->bpp/3;

	}



	if (!in->dsc_en)

		goto fec_check;



	temp1_fp = drm_fixp_from_fraction(in->compress_ratio, 100);

	temp2_fp = drm_fixp_from_fraction(in->bpp, 1);

	temp3_fp = drm_fixp_div(temp2_fp, temp1_fp);

	temp2_fp = drm_fixp_mul(tu->lwidth_fp, temp3_fp);



	temp1_fp = drm_fixp_from_fraction(8, 1);

	temp3_fp = drm_fixp_div(temp2_fp, temp1_fp);



	numerator = drm_fixp2int(temp3_fp);



	dsc_num_bytes  = numerator / dsc_num_slices;

	eoc_bytes           = dsc_num_bytes % nlanes;

	tot_num_eoc_symbols = nlanes * dsc_num_slices;

	tot_num_hor_bytes   = dsc_num_bytes * dsc_num_slices;

	tot_num_dummy_bytes = (nlanes - eoc_bytes) * dsc_num_slices;



	if (dsc_num_bytes == 0)

		pr_info("incorrect no of bytes per slice=%d\n", dsc_num_bytes);



	dwidth_dsc_bytes = (tot_num_hor_bytes +

				tot_num_eoc_symbols +

				(eoc_bytes == 0 ? 0 : tot_num_dummy_bytes));

	overhead_dsc     = dwidth_dsc_bytes / tot_num_hor_bytes;



	dwidth_dsc_fp = drm_fixp_from_fraction(dwidth_dsc_bytes, 3);



	temp2_fp = drm_fixp_mul(tu->pclk_fp, dwidth_dsc_fp);

	temp1_fp = drm_fixp_div(temp2_fp, tu->lwidth_fp);

	pclk_dsc_fp = temp1_fp;



	temp1_fp = drm_fixp_div(pclk_dsc_fp, tu->pclk_fp);

	temp2_fp = drm_fixp_mul(tu->hbp_relative_to_pclk_fp, temp1_fp);

	hbp_dsc_fp = temp2_fp;



	/* output */

	tu->pclk_fp = pclk_dsc_fp;

	tu->lwidth_fp = dwidth_dsc_fp;

	tu->hbp_relative_to_pclk_fp = hbp_dsc_fp;



fec_check:

	if (in->fec_en) {

		temp1_fp = drm_fixp_from_fraction(976, 1000); /* 0.976 */

		tu->lclk_fp = drm_fixp_mul(tu->lclk_fp, temp1_fp);

	}

}



static void _tu_valid_boundary_calc(struct tu_algo_data *tu)
@@ -228,10 +354,12 @@ static void _tu_valid_boundary_calc(struct tu_algo_data *tu) 
					tu->i_lower_boundary_count));



	temp1_fp = drm_fixp_from_fraction(tu->bpp, 8);

	temp2_fp = drm_fixp_from_fraction(tu->lwidth, 1);

	temp2_fp = tu->lwidth_fp;

	temp1_fp = drm_fixp_mul(temp2_fp, temp1_fp);

	temp2_fp = drm_fixp_div(temp1_fp, tu->average_valid2_fp);

	tu->n_tus = drm_fixp2int(temp2_fp);

	if ((temp2_fp & 0xFFFFFFFF) > 0xFFFFF000)

		tu->n_tus += 1;



	temp1_fp = drm_fixp_from_fraction(tu->n_tus, 1);

	temp2_fp = drm_fixp_mul(temp1_fp, tu->average_valid2_fp);
@@ -304,7 +432,7 @@ static void _tu_valid_boundary_calc(struct tu_algo_data *tu) 
	tu->even_distribution = tu->n_tus % tu->nlanes == 0 ? 1 : 0;



	temp1_fp = drm_fixp_from_fraction(tu->bpp, 8);

	temp2_fp = drm_fixp_from_fraction(tu->lwidth, 1);

	temp2_fp = tu->lwidth_fp;

	temp1_fp = drm_fixp_mul(temp2_fp, temp1_fp);

	temp2_fp = drm_fixp_div(temp1_fp, tu->average_valid2_fp);
@@ -433,44 +561,10 @@ static void _dp_panel_calc_tu(struct dp_tu_calc_input *in, 


	memset(&tu, 0, sizeof(tu));



	tu.lclk_fp              = drm_fixp_from_fraction(in->lclk, 1);

	tu.pclk_fp              = drm_fixp_from_fraction(in->pclk_khz, 1000);

	tu.lwidth               = in->hactive;

	tu.hbp_relative_to_pclk = in->hporch;

	tu.nlanes               = in->nlanes;

	tu.bpp                  = in->bpp;

	tu.pixelEnc             = in->pixel_enc;

	tu.dsc_en               = in->dsc_en;

	tu.async_en             = in->async_en;

	dp_panel_update_tu_timings(in, &tu);



	tu.err_fp = drm_fixp_from_fraction(1000, 1); /* 1000 */



	if (tu.pixelEnc == 420) {

		temp_fp = drm_fixp_from_fraction(2, 1);

		tu.pclk_fp = drm_fixp_div(tu.pclk_fp, temp_fp);

		tu.lwidth /= 2;

		tu.hbp_relative_to_pclk /= 2;

	}



	if (tu.pixelEnc == 422) {

		switch (tu.bpp) {

		case 24:

			tu.bpp = 16;

			tu.bpc = 8;

			break;

		case 30:

			tu.bpp = 20;

			tu.bpc = 10;

			break;

		default:

			tu.bpp = 16;

			tu.bpc = 8;

			break;

		}

	} else {

		tu.bpc = tu.bpp/3;

	}



	temp1_fp = drm_fixp_from_fraction(4, 1);

	temp2_fp = drm_fixp_mul(temp1_fp, tu.lclk_fp);

	temp_fp = drm_fixp_div(temp2_fp, tu.pclk_fp);
@@ -499,7 +593,9 @@ static void _dp_panel_calc_tu(struct dp_tu_calc_input *in, 
	tu.n_n_err_fp = 0;



	tu.ratio = drm_fixp2int(tu.ratio_fp);

	if ((((u32)tu.lwidth % tu.nlanes) != 0) &&

	temp1_fp = drm_fixp_from_fraction(tu.nlanes, 1);

	temp2_fp = tu.lwidth_fp % temp1_fp;

	if (temp2_fp != 0 &&

			!tu.ratio && tu.dsc_en == 0) {

		tu.ratio_fp = drm_fixp_mul(tu.ratio_fp, RATIO_SCALE_fp);

		tu.ratio = drm_fixp2int(tu.ratio_fp);
@@ -551,12 +647,14 @@ static void _dp_panel_calc_tu(struct dp_tu_calc_input *in, 
	tu.valid_boundary_link = drm_fixp2int_ceil(temp2_fp);



	temp1_fp = drm_fixp_from_fraction(tu.bpp, 8);

	temp2_fp = drm_fixp_from_fraction(tu.lwidth, 1);

	temp2_fp = tu.lwidth_fp;

	temp2_fp = drm_fixp_mul(temp2_fp, temp1_fp);



	temp1_fp = drm_fixp_from_fraction(tu.valid_boundary_link, 1);

	temp2_fp = drm_fixp_div(temp2_fp, temp1_fp);

	tu.n_tus = drm_fixp2int(temp2_fp);

	if ((temp2_fp & 0xFFFFFFFF) > 0xFFFFF000)

		tu.n_tus += 1;



	tu.even_distribution_legacy = tu.n_tus % tu.nlanes == 0 ? 1 : 0;

	pr_info("Info: n_sym = %d, num_of_tus = %d\n",
@@ -579,21 +677,19 @@ static void _dp_panel_calc_tu(struct dp_tu_calc_input *in, 
	temp2_fp = drm_fixp_from_fraction(8, tu.bpp);

	temp1_fp = drm_fixp_mul(temp1_fp, temp2_fp);



	temp - drm_fixp2int(temp1_fp);

	if (temp && temp1_fp)

	if (temp1_fp)

		tu.extra_pclk_cycles = drm_fixp2int_ceil(temp1_fp);

	else

		tu.extra_pclk_cycles = 0;

		tu.extra_pclk_cycles = drm_fixp2int(temp1_fp);



	temp1_fp = drm_fixp_div(tu.lclk_fp, tu.pclk_fp);

	temp2_fp = drm_fixp_from_fraction(tu.extra_pclk_cycles, 1);

	temp1_fp = drm_fixp_mul(temp2_fp, temp1_fp);



	temp = drm_fixp2int(temp1_fp);

	if (temp && temp1_fp)

	if (temp1_fp)

		tu.extra_pclk_cycles_in_link_clk = drm_fixp2int_ceil(temp1_fp);

	else

		tu.extra_pclk_cycles_in_link_clk = 0;

		tu.extra_pclk_cycles_in_link_clk = drm_fixp2int(temp1_fp);



	tu.filler_size = tu.tu_size_desired - tu.valid_boundary_link;
@@ -610,8 +706,8 @@ static void _dp_panel_calc_tu(struct dp_tu_calc_input *in, 
	temp2_fp = drm_fixp_div(tu.resulting_valid_fp, temp1_fp);

	tu.TU_ratio_err_fp = temp2_fp - tu.original_ratio_fp;



	temp1_fp = drm_fixp_from_fraction(

			(tu.hbp_relative_to_pclk - HBLANK_MARGIN), 1);

	temp1_fp = drm_fixp_from_fraction(HBLANK_MARGIN, 1);

	temp1_fp = tu.hbp_relative_to_pclk_fp - temp1_fp;

	tu.hbp_time_fp = drm_fixp_div(temp1_fp, tu.pclk_fp);



	temp1_fp = drm_fixp_from_fraction(tu.delay_start_link, 1);
@@ -619,11 +715,10 @@ static void _dp_panel_calc_tu(struct dp_tu_calc_input *in, 


	compare_result_1 = _tu_param_compare(tu.hbp_time_fp,

					tu.delay_start_time_fp);

	if (compare_result_1 == 2) /* if (hbp_time_fp < delay_start_time_fp) */

	if (compare_result_1 == 2) /* hbp_time_fp < delay_start_time_fp */

		tu.min_hblank_violated = 1;



	temp1_fp = drm_fixp_from_fraction(tu.lwidth, 1);

	tu.hactive_time_fp = drm_fixp_div(temp1_fp, tu.pclk_fp);

	tu.hactive_time_fp = drm_fixp_div(tu.lwidth_fp, tu.pclk_fp);



	compare_result_2 = _tu_param_compare(tu.hactive_time_fp,

						tu.delay_start_time_fp);
@@ -666,8 +761,8 @@ static void _dp_panel_calc_tu(struct dp_tu_calc_input *in, 
				tu.extra_buffer_margin = 0;



			temp1_fp = drm_fixp_from_fraction(tu.bpp, 8);

			temp2_fp = drm_fixp_from_fraction(tu.lwidth, 1);

			temp1_fp = drm_fixp_mul(temp2_fp, temp1_fp);

			temp1_fp = drm_fixp_mul(tu.lwidth_fp, temp1_fp);





			if (temp1_fp)

				tu.n_symbols = drm_fixp2int_ceil(temp1_fp);
@@ -711,8 +806,7 @@ static void _dp_panel_calc_tu(struct dp_tu_calc_input *in, 
				tu.valid_boundary_link - 1;



			temp1_fp = drm_fixp_from_fraction(tu.bpp, 8);

			temp2_fp = drm_fixp_from_fraction(tu.lwidth, 1);

			temp1_fp = drm_fixp_mul(temp2_fp, temp1_fp);

			temp1_fp = drm_fixp_mul(tu.lwidth_fp, temp1_fp);

			temp2_fp = drm_fixp_div(temp1_fp,

						tu.resulting_valid_fp);

			tu.n_tus = drm_fixp2int(temp2_fp);
@@ -728,8 +822,7 @@ static void _dp_panel_calc_tu(struct dp_tu_calc_input *in, 
		}

	}



	temp1_fp = drm_fixp_from_fraction(tu.lwidth, 1);

	temp2_fp = drm_fixp_mul(LCLK_FAST_SKEW_fp, temp1_fp);

	temp2_fp = drm_fixp_mul(LCLK_FAST_SKEW_fp, tu.lwidth_fp);



	if (temp2_fp)

		temp = drm_fixp2int_ceil(temp2_fp);
@@ -794,6 +887,9 @@ static void dp_panel_calc_tu_parameters(struct dp_panel *dp_panel, 
	in.pixel_enc = 444;

	in.dsc_en = 0;

	in.async_en = 0;

	in.fec_en = 0;

	in.compress_ratio = 0;

	in.num_of_dsc_slices = 0;



	_dp_panel_calc_tu(&in, tu_table);

}

drivers/gpu/drm/msm/dp/dp_panel.h

+3 −0
Original line number Diff line number Diff line
@@ -142,6 +142,9 @@ struct dp_tu_calc_input { 
	int pixel_enc;   /* 444, 420, 422 */

	int dsc_en;     /* dsc on/off */

	int async_en;   /* async mode */

	int fec_en;     /* fec */

	int compress_ratio; /* 2:1 = 200, 3:1 = 300, 3.75:1 = 375 */

	int num_of_dsc_slices; /* number of slices per line */

};



struct dp_vc_tu_mapping_table {