disp: msm: sde: fix dsc initial line caluclation

Current DSC intial line calculation is giving extra line on top of
recommended value from systems since number of active soft slices
considered is wrong. Fix the number or usage of active soft slices
in an encoder to align dsc initial line with recommended setting.

Change-Id: I321260e22b7824b8c481a55b54831ce9535661cc
Signed-off-by: Prabhanjan Kandula <pkandula@codeaurora.org>

msm/sde/sde_encoder_dce.c

@@ -123,7 +123,6 @@ static int _dce_dsc_initial_line_calc(struct msm_display_dsc_info *dsc,
 
 	int bpc = dsc->config.bits_per_component;
 	int bpp = DSC_BPP(dsc->config);
-	int num_of_active_ss = dsc->config.slice_count;
 	bool native_422 = dsc->config.native_422;
 	bool native_420 = dsc->config.native_420;
 
@@ -135,7 +134,7 @@ static int _dce_dsc_initial_line_calc(struct msm_display_dsc_info *dsc,
 	if (dsc_cmn_mode & DSC_MODE_MULTIPLEX)
 		multiplex_mode_enable = 1;
 	if (dsc_cmn_mode & DSC_MODE_SPLIT_PANEL)
-		split_panel_enable = 0;
+		split_panel_enable = 1;
 	container_slice_width = (native_422 ?
 			dsc->config.slice_width / 2 : dsc->config.slice_width);
 	max_muxword_size = (rtl_max_bpc >= 12) ? 64 : 48;
@@ -144,7 +143,7 @@ static int _dce_dsc_initial_line_calc(struct msm_display_dsc_info *dsc,
 	mux_word_size = (bpc >= 12) ? 64 : 48;
 	compress_bpp_group = native_422 ? (2 * bpp) : bpp;
 	input_ssm_out_latency = pipeline_latency + 3 * (max_ssm_delay + 2)
-			* num_of_active_ss;
+			* dsc->num_active_ss_per_enc;
 	rtl_num_components = (native_420 || native_422) ? 4 : 3;
 	ob_data_width_4comps = (rtl_output_data_width >= (2 *
 			max_muxword_size)) ?
@@ -164,8 +163,7 @@ static int _dce_dsc_initial_line_calc(struct msm_display_dsc_info *dsc,
 		(output_rate_ratio_complement * chunk_bits) >>
 		((ob_data_width == 128) ? 7 : 6);
 	multi_hs_c = split_panel_enable * multiplex_mode_enable;
-	multi_hs_d = (num_of_active_ss > 1) * (ob_data_width >
-			compress_bpp_group);
+	multi_hs_d = (dsc->num_active_ss_per_enc > 1) * (ob_data_width > compress_bpp_group);
 	multi_hs_extra_budget_bits = multi_hs_c ?
 				chunk_bits : (multi_hs_d ? chunk_bits :
 					output_rate_extra_budget_bits);
@@ -480,6 +478,12 @@ static int _dce_dsc_setup_helper(struct sde_encoder_virt *sde_enc,
 	if (enc_master->intf_mode == INTF_MODE_VIDEO)
 		dsc_common_mode |= DSC_MODE_VIDEO;
 
+	dsc->num_active_ss_per_enc = dsc->config.slice_count;
+	if (dsc->dsc_4hsmerge_en)
+		dsc->num_active_ss_per_enc = dsc->config.slice_count >> 2;
+	else if ((dsc_common_mode & DSC_MODE_MULTIPLEX) || (dsc->half_panel_pu))
+		dsc->num_active_ss_per_enc = dsc->config.slice_count >> 1;
+
 	sde_dsc_populate_dsc_private_params(dsc, intf_ip_w);
 
 	_dce_dsc_initial_line_calc(dsc, enc_ip_w, dsc_common_mode);