drm/amd/display: stop using switch for different CS revisions

Clock sources currently have support for asic specific
function pointers. But actual separation into functions
was never performed, leaving us with giant functions that
rely on switch.

This change creates separate functions, removing switch use.

Signed-off-by: Dmytro Laktyushkin <Dmytro.Laktyushkin@amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
Acked-by: Leo Li <sunpeng.li@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/dce/dce_clock_source.c

@@ -584,34 +584,42 @@ static uint32_t dce110_get_pix_clk_dividers(
 		return 0;
 	}
 
-	switch (cs->ctx->dce_version) {
-	case DCE_VERSION_8_0:
-	case DCE_VERSION_8_1:
-	case DCE_VERSION_8_3:
-	case DCE_VERSION_10_0:
-	case DCE_VERSION_11_0:
-		pll_calc_error =
-			dce110_get_pix_clk_dividers_helper(clk_src,
+	pll_calc_error = dce110_get_pix_clk_dividers_helper(clk_src,
 			pll_settings, pix_clk_params);
-		break;
-	case DCE_VERSION_11_2:
-	case DCE_VERSION_11_22:
-	case DCE_VERSION_12_0:
-#if defined(CONFIG_DRM_AMD_DC_DCN1_0)
-	case DCN_VERSION_1_0:
-#endif
 
-#if defined(CONFIG_DRM_AMD_DC_DCN1_01)
-	case DCN_VERSION_1_01:
-#endif
-		dce112_get_pix_clk_dividers_helper(clk_src,
-				pll_settings, pix_clk_params);
-		break;
-	default:
-		break;
+	return pll_calc_error;
+}
+
+static uint32_t dce112_get_pix_clk_dividers(
+		struct clock_source *cs,
+		struct pixel_clk_params *pix_clk_params,
+		struct pll_settings *pll_settings)
+{
+	struct dce110_clk_src *clk_src = TO_DCE110_CLK_SRC(cs);
+	DC_LOGGER_INIT();
+
+	if (pix_clk_params == NULL || pll_settings == NULL
+			|| pix_clk_params->requested_pix_clk == 0) {
+		DC_LOG_ERROR(
+			"%s: Invalid parameters!!\n", __func__);
+		return -1;
 	}
 
-	return pll_calc_error;
+	memset(pll_settings, 0, sizeof(*pll_settings));
+
+	if (cs->id == CLOCK_SOURCE_ID_DP_DTO ||
+			cs->id == CLOCK_SOURCE_ID_EXTERNAL) {
+		pll_settings->adjusted_pix_clk = clk_src->ext_clk_khz;
+		pll_settings->calculated_pix_clk = clk_src->ext_clk_khz;
+		pll_settings->actual_pix_clk =
+					pix_clk_params->requested_pix_clk;
+		return -1;
+	}
+
+	dce112_get_pix_clk_dividers_helper(clk_src,
+			pll_settings, pix_clk_params);
+
+	return 0;
 }
 
 static bool disable_spread_spectrum(struct dce110_clk_src *clk_src)
@@ -833,6 +841,65 @@ static bool dce110_program_pix_clk(
 	struct dce110_clk_src *clk_src = TO_DCE110_CLK_SRC(clock_source);
 	struct bp_pixel_clock_parameters bp_pc_params = {0};
 
+	/* First disable SS
+	 * ATOMBIOS will enable by default SS on PLL for DP,
+	 * do not disable it here
+	 */
+	if (clock_source->id != CLOCK_SOURCE_ID_EXTERNAL &&
+			!dc_is_dp_signal(pix_clk_params->signal_type) &&
+			clock_source->ctx->dce_version <= DCE_VERSION_11_0)
+		disable_spread_spectrum(clk_src);
+
+	/*ATOMBIOS expects pixel rate adjusted by deep color ratio)*/
+	bp_pc_params.controller_id = pix_clk_params->controller_id;
+	bp_pc_params.pll_id = clock_source->id;
+	bp_pc_params.target_pixel_clock = pll_settings->actual_pix_clk;
+	bp_pc_params.encoder_object_id = pix_clk_params->encoder_object_id;
+	bp_pc_params.signal_type = pix_clk_params->signal_type;
+
+	bp_pc_params.reference_divider = pll_settings->reference_divider;
+	bp_pc_params.feedback_divider = pll_settings->feedback_divider;
+	bp_pc_params.fractional_feedback_divider =
+			pll_settings->fract_feedback_divider;
+	bp_pc_params.pixel_clock_post_divider =
+			pll_settings->pix_clk_post_divider;
+	bp_pc_params.flags.SET_EXTERNAL_REF_DIV_SRC =
+					pll_settings->use_external_clk;
+
+	if (clk_src->bios->funcs->set_pixel_clock(
+			clk_src->bios, &bp_pc_params) != BP_RESULT_OK)
+		return false;
+	/* Enable SS
+	 * ATOMBIOS will enable by default SS for DP on PLL ( DP ID clock),
+	 * based on HW display PLL team, SS control settings should be programmed
+	 * during PLL Reset, but they do not have effect
+	 * until SS_EN is asserted.*/
+	if (clock_source->id != CLOCK_SOURCE_ID_EXTERNAL
+			&& !dc_is_dp_signal(pix_clk_params->signal_type)) {
+
+		if (pix_clk_params->flags.ENABLE_SS)
+			if (!enable_spread_spectrum(clk_src,
+							pix_clk_params->signal_type,
+							pll_settings))
+				return false;
+
+		/* Resync deep color DTO */
+		dce110_program_pixel_clk_resync(clk_src,
+					pix_clk_params->signal_type,
+					pix_clk_params->color_depth);
+	}
+
+	return true;
+}
+
+static bool dce112_program_pix_clk(
+		struct clock_source *clock_source,
+		struct pixel_clk_params *pix_clk_params,
+		struct pll_settings *pll_settings)
+{
+	struct dce110_clk_src *clk_src = TO_DCE110_CLK_SRC(clock_source);
+	struct bp_pixel_clock_parameters bp_pc_params = {0};
+
 #if defined(CONFIG_DRM_AMD_DC_DCN1_0)
 	if (IS_FPGA_MAXIMUS_DC(clock_source->ctx->dce_environment)) {
 		unsigned int inst = pix_clk_params->controller_id - CONTROLLER_ID_D0;
@@ -864,82 +931,29 @@ static bool dce110_program_pix_clk(
 	bp_pc_params.encoder_object_id = pix_clk_params->encoder_object_id;
 	bp_pc_params.signal_type = pix_clk_params->signal_type;
 
-	switch (clock_source->ctx->dce_version) {
-	case DCE_VERSION_8_0:
-	case DCE_VERSION_8_1:
-	case DCE_VERSION_8_3:
-	case DCE_VERSION_10_0:
-	case DCE_VERSION_11_0:
-		bp_pc_params.reference_divider = pll_settings->reference_divider;
-		bp_pc_params.feedback_divider = pll_settings->feedback_divider;
-		bp_pc_params.fractional_feedback_divider =
-				pll_settings->fract_feedback_divider;
-		bp_pc_params.pixel_clock_post_divider =
-				pll_settings->pix_clk_post_divider;
-		bp_pc_params.flags.SET_EXTERNAL_REF_DIV_SRC =
+	if (clock_source->id != CLOCK_SOURCE_ID_DP_DTO) {
+		bp_pc_params.flags.SET_GENLOCK_REF_DIV_SRC =
 						pll_settings->use_external_clk;
-
-		if (clk_src->bios->funcs->set_pixel_clock(
-				clk_src->bios, &bp_pc_params) != BP_RESULT_OK)
-			return false;
-		/* Enable SS
-		 * ATOMBIOS will enable by default SS for DP on PLL ( DP ID clock),
-		 * based on HW display PLL team, SS control settings should be programmed
-		 * during PLL Reset, but they do not have effect
-		 * until SS_EN is asserted.*/
-		if (clock_source->id != CLOCK_SOURCE_ID_EXTERNAL
-				&& !dc_is_dp_signal(pix_clk_params->signal_type)) {
-
-			if (pix_clk_params->flags.ENABLE_SS)
-				if (!enable_spread_spectrum(clk_src,
-								pix_clk_params->signal_type,
-								pll_settings))
-					return false;
-
-			/* Resync deep color DTO */
-			dce110_program_pixel_clk_resync(clk_src,
-						pix_clk_params->signal_type,
-						pix_clk_params->color_depth);
+		bp_pc_params.flags.SET_XTALIN_REF_SRC =
+						!pll_settings->use_external_clk;
+		if (pix_clk_params->flags.SUPPORT_YCBCR420) {
+			bp_pc_params.flags.SUPPORT_YUV_420 = 1;
 		}
-
-		break;
-	case DCE_VERSION_11_2:
-	case DCE_VERSION_11_22:
-	case DCE_VERSION_12_0:
-#if defined(CONFIG_DRM_AMD_DC_DCN1_0)
-	case DCN_VERSION_1_0:
-#endif
-
-#if defined(CONFIG_DRM_AMD_DC_DCN1_01)
-	case DCN_VERSION_1_01:
-#endif
-
-		if (clock_source->id != CLOCK_SOURCE_ID_DP_DTO) {
-			bp_pc_params.flags.SET_GENLOCK_REF_DIV_SRC =
-							pll_settings->use_external_clk;
-			bp_pc_params.flags.SET_XTALIN_REF_SRC =
-							!pll_settings->use_external_clk;
-			if (pix_clk_params->flags.SUPPORT_YCBCR420) {
-				bp_pc_params.flags.SUPPORT_YUV_420 = 1;
-			}
-		}
-		if (clk_src->bios->funcs->set_pixel_clock(
-				clk_src->bios, &bp_pc_params) != BP_RESULT_OK)
-			return false;
-		/* Resync deep color DTO */
-		if (clock_source->id != CLOCK_SOURCE_ID_DP_DTO)
-			dce112_program_pixel_clk_resync(clk_src,
-						pix_clk_params->signal_type,
-						pix_clk_params->color_depth,
-						pix_clk_params->flags.SUPPORT_YCBCR420);
-		break;
-	default:
-		break;
 	}
+	if (clk_src->bios->funcs->set_pixel_clock(
+			clk_src->bios, &bp_pc_params) != BP_RESULT_OK)
+		return false;
+	/* Resync deep color DTO */
+	if (clock_source->id != CLOCK_SOURCE_ID_DP_DTO)
+		dce112_program_pixel_clk_resync(clk_src,
+					pix_clk_params->signal_type,
+					pix_clk_params->color_depth,
+					pix_clk_params->flags.SUPPORT_YCBCR420);
 
 	return true;
 }
 
+
 static bool dce110_clock_source_power_down(
 		struct clock_source *clk_src)
 {
@@ -966,12 +980,19 @@ static bool dce110_clock_source_power_down(
 /*****************************************/
 /* Constructor                           */
 /*****************************************/
+
+static const struct clock_source_funcs dce112_clk_src_funcs = {
+	.cs_power_down = dce110_clock_source_power_down,
+	.program_pix_clk = dce112_program_pix_clk,
+	.get_pix_clk_dividers = dce112_get_pix_clk_dividers
+};
 static const struct clock_source_funcs dce110_clk_src_funcs = {
 	.cs_power_down = dce110_clock_source_power_down,
 	.program_pix_clk = dce110_program_pix_clk,
 	.get_pix_clk_dividers = dce110_get_pix_clk_dividers
 };
 
+
 static void get_ss_info_from_atombios(
 		struct dce110_clk_src *clk_src,
 		enum as_signal_type as_signal,
@@ -1227,81 +1248,70 @@ bool dce110_clk_src_construct(
 	clk_src->ext_clk_khz =
 			fw_info.external_clock_source_frequency_for_dp;
 
-	switch (clk_src->base.ctx->dce_version) {
-	case DCE_VERSION_8_0:
-	case DCE_VERSION_8_1:
-	case DCE_VERSION_8_3:
-	case DCE_VERSION_10_0:
-	case DCE_VERSION_11_0:
-
-		/* structure normally used with PLL ranges from ATOMBIOS; DS on by default */
-		calc_pll_cs_init_data.bp = bios;
-		calc_pll_cs_init_data.min_pix_clk_pll_post_divider = 1;
-		calc_pll_cs_init_data.max_pix_clk_pll_post_divider =
-				clk_src->cs_mask->PLL_POST_DIV_PIXCLK;
-		calc_pll_cs_init_data.min_pll_ref_divider =	1;
-		calc_pll_cs_init_data.max_pll_ref_divider =	clk_src->cs_mask->PLL_REF_DIV;
-		/* when 0 use minInputPxlClkPLLFrequencyInKHz from firmwareInfo*/
-		calc_pll_cs_init_data.min_override_input_pxl_clk_pll_freq_khz =	0;
-		/* when 0 use maxInputPxlClkPLLFrequencyInKHz from firmwareInfo*/
-		calc_pll_cs_init_data.max_override_input_pxl_clk_pll_freq_khz =	0;
-		/*numberOfFractFBDividerDecimalPoints*/
-		calc_pll_cs_init_data.num_fract_fb_divider_decimal_point =
-				FRACT_FB_DIVIDER_DEC_POINTS_MAX_NUM;
-		/*number of decimal point to round off for fractional feedback divider value*/
-		calc_pll_cs_init_data.num_fract_fb_divider_decimal_point_precision =
-				FRACT_FB_DIVIDER_DEC_POINTS_MAX_NUM;
-		calc_pll_cs_init_data.ctx =	ctx;
-
-		/*structure for HDMI, no SS or SS% <= 0.06% for 27 MHz Ref clock */
-		calc_pll_cs_init_data_hdmi.bp = bios;
-		calc_pll_cs_init_data_hdmi.min_pix_clk_pll_post_divider = 1;
-		calc_pll_cs_init_data_hdmi.max_pix_clk_pll_post_divider =
-				clk_src->cs_mask->PLL_POST_DIV_PIXCLK;
-		calc_pll_cs_init_data_hdmi.min_pll_ref_divider = 1;
-		calc_pll_cs_init_data_hdmi.max_pll_ref_divider = clk_src->cs_mask->PLL_REF_DIV;
-		/* when 0 use minInputPxlClkPLLFrequencyInKHz from firmwareInfo*/
-		calc_pll_cs_init_data_hdmi.min_override_input_pxl_clk_pll_freq_khz = 13500;
-		/* when 0 use maxInputPxlClkPLLFrequencyInKHz from firmwareInfo*/
-		calc_pll_cs_init_data_hdmi.max_override_input_pxl_clk_pll_freq_khz = 27000;
-		/*numberOfFractFBDividerDecimalPoints*/
-		calc_pll_cs_init_data_hdmi.num_fract_fb_divider_decimal_point =
-				FRACT_FB_DIVIDER_DEC_POINTS_MAX_NUM;
-		/*number of decimal point to round off for fractional feedback divider value*/
-		calc_pll_cs_init_data_hdmi.num_fract_fb_divider_decimal_point_precision =
-				FRACT_FB_DIVIDER_DEC_POINTS_MAX_NUM;
-		calc_pll_cs_init_data_hdmi.ctx = ctx;
-
-		clk_src->ref_freq_khz = fw_info.pll_info.crystal_frequency;
-
-		if (clk_src->base.id == CLOCK_SOURCE_ID_EXTERNAL)
-			return true;
-
-		/* PLL only from here on */
-		ss_info_from_atombios_create(clk_src);
-
-		if (!calc_pll_max_vco_construct(
-				&clk_src->calc_pll,
-				&calc_pll_cs_init_data)) {
-			ASSERT_CRITICAL(false);
-			goto unexpected_failure;
-		}
+	/* structure normally used with PLL ranges from ATOMBIOS; DS on by default */
+	calc_pll_cs_init_data.bp = bios;
+	calc_pll_cs_init_data.min_pix_clk_pll_post_divider = 1;
+	calc_pll_cs_init_data.max_pix_clk_pll_post_divider =
+			clk_src->cs_mask->PLL_POST_DIV_PIXCLK;
+	calc_pll_cs_init_data.min_pll_ref_divider =	1;
+	calc_pll_cs_init_data.max_pll_ref_divider =	clk_src->cs_mask->PLL_REF_DIV;
+	/* when 0 use minInputPxlClkPLLFrequencyInKHz from firmwareInfo*/
+	calc_pll_cs_init_data.min_override_input_pxl_clk_pll_freq_khz =	0;
+	/* when 0 use maxInputPxlClkPLLFrequencyInKHz from firmwareInfo*/
+	calc_pll_cs_init_data.max_override_input_pxl_clk_pll_freq_khz =	0;
+	/*numberOfFractFBDividerDecimalPoints*/
+	calc_pll_cs_init_data.num_fract_fb_divider_decimal_point =
+			FRACT_FB_DIVIDER_DEC_POINTS_MAX_NUM;
+	/*number of decimal point to round off for fractional feedback divider value*/
+	calc_pll_cs_init_data.num_fract_fb_divider_decimal_point_precision =
+			FRACT_FB_DIVIDER_DEC_POINTS_MAX_NUM;
+	calc_pll_cs_init_data.ctx =	ctx;
+
+	/*structure for HDMI, no SS or SS% <= 0.06% for 27 MHz Ref clock */
+	calc_pll_cs_init_data_hdmi.bp = bios;
+	calc_pll_cs_init_data_hdmi.min_pix_clk_pll_post_divider = 1;
+	calc_pll_cs_init_data_hdmi.max_pix_clk_pll_post_divider =
+			clk_src->cs_mask->PLL_POST_DIV_PIXCLK;
+	calc_pll_cs_init_data_hdmi.min_pll_ref_divider = 1;
+	calc_pll_cs_init_data_hdmi.max_pll_ref_divider = clk_src->cs_mask->PLL_REF_DIV;
+	/* when 0 use minInputPxlClkPLLFrequencyInKHz from firmwareInfo*/
+	calc_pll_cs_init_data_hdmi.min_override_input_pxl_clk_pll_freq_khz = 13500;
+	/* when 0 use maxInputPxlClkPLLFrequencyInKHz from firmwareInfo*/
+	calc_pll_cs_init_data_hdmi.max_override_input_pxl_clk_pll_freq_khz = 27000;
+	/*numberOfFractFBDividerDecimalPoints*/
+	calc_pll_cs_init_data_hdmi.num_fract_fb_divider_decimal_point =
+			FRACT_FB_DIVIDER_DEC_POINTS_MAX_NUM;
+	/*number of decimal point to round off for fractional feedback divider value*/
+	calc_pll_cs_init_data_hdmi.num_fract_fb_divider_decimal_point_precision =
+			FRACT_FB_DIVIDER_DEC_POINTS_MAX_NUM;
+	calc_pll_cs_init_data_hdmi.ctx = ctx;
+
+	clk_src->ref_freq_khz = fw_info.pll_info.crystal_frequency;
+
+	if (clk_src->base.id == CLOCK_SOURCE_ID_EXTERNAL)
+		return true;
 
+	/* PLL only from here on */
+	ss_info_from_atombios_create(clk_src);
 
-		calc_pll_cs_init_data_hdmi.
-				min_override_input_pxl_clk_pll_freq_khz = clk_src->ref_freq_khz/2;
-		calc_pll_cs_init_data_hdmi.
-				max_override_input_pxl_clk_pll_freq_khz = clk_src->ref_freq_khz;
+	if (!calc_pll_max_vco_construct(
+			&clk_src->calc_pll,
+			&calc_pll_cs_init_data)) {
+		ASSERT_CRITICAL(false);
+		goto unexpected_failure;
+	}
 
 
-		if (!calc_pll_max_vco_construct(
-				&clk_src->calc_pll_hdmi, &calc_pll_cs_init_data_hdmi)) {
-			ASSERT_CRITICAL(false);
-			goto unexpected_failure;
-		}
-		break;
-	default:
-		break;
+	calc_pll_cs_init_data_hdmi.
+			min_override_input_pxl_clk_pll_freq_khz = clk_src->ref_freq_khz/2;
+	calc_pll_cs_init_data_hdmi.
+			max_override_input_pxl_clk_pll_freq_khz = clk_src->ref_freq_khz;
+
+
+	if (!calc_pll_max_vco_construct(
+			&clk_src->calc_pll_hdmi, &calc_pll_cs_init_data_hdmi)) {
+		ASSERT_CRITICAL(false);
+		goto unexpected_failure;
 	}
 
 	return true;
@@ -1310,3 +1320,34 @@ unexpected_failure:
 	return false;
 }
 
+bool dce112_clk_src_construct(
+	struct dce110_clk_src *clk_src,
+	struct dc_context *ctx,
+	struct dc_bios *bios,
+	enum clock_source_id id,
+	const struct dce110_clk_src_regs *regs,
+	const struct dce110_clk_src_shift *cs_shift,
+	const struct dce110_clk_src_mask *cs_mask)
+{
+	struct dc_firmware_info fw_info = { { 0 } };
+
+	clk_src->base.ctx = ctx;
+	clk_src->bios = bios;
+	clk_src->base.id = id;
+	clk_src->base.funcs = &dce112_clk_src_funcs;
+
+	clk_src->regs = regs;
+	clk_src->cs_shift = cs_shift;
+	clk_src->cs_mask = cs_mask;
+
+	if (clk_src->bios->funcs->get_firmware_info(
+			clk_src->bios, &fw_info) != BP_RESULT_OK) {
+		ASSERT_CRITICAL(false);
+		return false;
+	}
+
+	clk_src->ext_clk_khz = fw_info.external_clock_source_frequency_for_dp;
+
+	return true;
+}
+

drivers/gpu/drm/amd/display/dc/dce/dce_clock_source.h

@@ -144,4 +144,13 @@ bool dce110_clk_src_construct(
 	const struct dce110_clk_src_shift *cs_shift,
 	const struct dce110_clk_src_mask *cs_mask);
 
+bool dce112_clk_src_construct(
+	struct dce110_clk_src *clk_src,
+	struct dc_context *ctx,
+	struct dc_bios *bios,
+	enum clock_source_id id,
+	const struct dce110_clk_src_regs *regs,
+	const struct dce110_clk_src_shift *cs_shift,
+	const struct dce110_clk_src_mask *cs_mask);
+
 #endif

drivers/gpu/drm/amd/display/dc/dce112/dce112_resource.c

@@ -670,7 +670,7 @@ struct clock_source *dce112_clock_source_create(
 	if (!clk_src)
 		return NULL;
 
-	if (dce110_clk_src_construct(clk_src, ctx, bios, id,
+	if (dce112_clk_src_construct(clk_src, ctx, bios, id,
 			regs, &cs_shift, &cs_mask)) {
 		clk_src->base.dp_clk_src = dp_clk_src;
 		return &clk_src->base;

drivers/gpu/drm/amd/display/dc/dce120/dce120_resource.c

@@ -456,7 +456,7 @@ struct clock_source *dce120_clock_source_create(
 	if (!clk_src)
 		return NULL;
 
-	if (dce110_clk_src_construct(clk_src, ctx, bios, id,
+	if (dce112_clk_src_construct(clk_src, ctx, bios, id,
 				     regs, &cs_shift, &cs_mask)) {
 		clk_src->base.dp_clk_src = dp_clk_src;
 		return &clk_src->base;

drivers/gpu/drm/amd/display/dc/dcn10/dcn10_resource.c

@@ -749,7 +749,7 @@ struct clock_source *dcn10_clock_source_create(
 	if (!clk_src)
 		return NULL;
 
-	if (dce110_clk_src_construct(clk_src, ctx, bios, id,
+	if (dce112_clk_src_construct(clk_src, ctx, bios, id,
 			regs, &cs_shift, &cs_mask)) {
 		clk_src->base.dp_clk_src = dp_clk_src;
 		return &clk_src->base;