1 files changed, 299 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/dcn32/dcn32_dccg.c b/drivers/gpu/drm/amd/display/dc/dcn32/dcn32_dccg.c
new file mode 100644
index 000000000000..12633561be3f
--- /dev/null
+++ b/drivers/gpu/drm/amd/display/dc/dcn32/dcn32_dccg.c
@@ -0,0 +1,299 @@
+/*
+ * Copyright 2021 Advanced Micro Devices, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * Authors: AMD
+ *
+ */
+
+#include "reg_helper.h"
+#include "core_types.h"
+#include "dcn32_dccg.h"
+
+#define TO_DCN_DCCG(dccg)\
+	container_of(dccg, struct dcn_dccg, base)
+
+#define REG(reg) \
+	(dccg_dcn->regs->reg)
+
+#undef FN
+#define FN(reg_name, field_name) \
+	dccg_dcn->dccg_shift->field_name, dccg_dcn->dccg_mask->field_name
+
+#define CTX \
+	dccg_dcn->base.ctx
+#define DC_LOGGER \
+	dccg->ctx->logger
+
+enum pixel_rate_div {
+	PIXEL_RATE_DIV_BY_1 = 0,
+	PIXEL_RATE_DIV_BY_2 = 1,
+	PIXEL_RATE_DIV_BY_4 = 3
+};
+
+static void dccg32_set_pixel_rate_div(
+		struct dccg *dccg,
+		uint32_t otg_inst,
+		enum pixel_rate_div k1,
+		enum pixel_rate_div k2)
+{
+	struct dcn_dccg *dccg_dcn = TO_DCN_DCCG(dccg);
+
+	switch (otg_inst) {
+	case 0:
+		REG_UPDATE_2(OTG_PIXEL_RATE_DIV,
+				OTG0_PIXEL_RATE_DIVK1, k1,
+				OTG0_PIXEL_RATE_DIVK2, k2);
+		break;
+	case 1:
+		REG_UPDATE_2(OTG_PIXEL_RATE_DIV,
+				OTG1_PIXEL_RATE_DIVK1, k1,
+				OTG1_PIXEL_RATE_DIVK2, k2);
+		break;
+	case 2:
+		REG_UPDATE_2(OTG_PIXEL_RATE_DIV,
+				OTG2_PIXEL_RATE_DIVK1, k1,
+				OTG2_PIXEL_RATE_DIVK2, k2);
+		break;
+	case 3:
+		REG_UPDATE_2(OTG_PIXEL_RATE_DIV,
+				OTG3_PIXEL_RATE_DIVK1, k1,
+				OTG3_PIXEL_RATE_DIVK2, k2);
+		break;
+	default:
+		BREAK_TO_DEBUGGER();
+		return;
+	}
+}
+
+static void dccg32_set_dtbclk_p_src(
+		struct dccg *dccg,
+		enum streamclk_source src,
+		uint32_t otg_inst)
+{
+	struct dcn_dccg *dccg_dcn = TO_DCN_DCCG(dccg);
+
+	uint32_t p_src_sel = 0; /* selects dprefclk */
+	if (src == DTBCLK0)
+		p_src_sel = 2;  /* selects dtbclk0 */
+
+	switch (otg_inst) {
+	case 0:
+		if (src == REFCLK)
+			REG_UPDATE(DTBCLK_P_CNTL,
+					DTBCLK_P0_EN, 0);
+		else
+			REG_UPDATE_2(DTBCLK_P_CNTL,
+					DTBCLK_P0_SRC_SEL, p_src_sel,
+					DTBCLK_P0_EN, 1);
+		break;
+	case 1:
+		if (src == REFCLK)
+			REG_UPDATE(DTBCLK_P_CNTL,
+					DTBCLK_P1_EN, 0);
+		else
+			REG_UPDATE_2(DTBCLK_P_CNTL,
+					DTBCLK_P1_SRC_SEL, p_src_sel,
+					DTBCLK_P1_EN, 1);
+		break;
+	case 2:
+		if (src == REFCLK)
+			REG_UPDATE(DTBCLK_P_CNTL,
+					DTBCLK_P2_EN, 0);
+		else
+			REG_UPDATE_2(DTBCLK_P_CNTL,
+					DTBCLK_P2_SRC_SEL, p_src_sel,
+					DTBCLK_P2_EN, 1);
+		break;
+	case 3:
+		if (src == REFCLK)
+			REG_UPDATE(DTBCLK_P_CNTL,
+					DTBCLK_P3_EN, 0);
+		else
+			REG_UPDATE_2(DTBCLK_P_CNTL,
+					DTBCLK_P3_SRC_SEL, p_src_sel,
+					DTBCLK_P3_EN, 1);
+		break;
+	default:
+		BREAK_TO_DEBUGGER();
+		return;
+	}
+
+}
+
+/* Controls the generation of pixel valid for OTG in (OTG -> HPO case) */
+void dccg32_set_dtbclk_dto(
+		struct dccg *dccg,
+		int otg_inst,
+		int pixclk_khz,
+		int num_odm_segments,
+		const struct dc_crtc_timing *timing)
+{
+	struct dcn_dccg *dccg_dcn = TO_DCN_DCCG(dccg);
+	/* DTO Output Rate / Pixel Rate = 1/4 */
+	int req_dtbclk_khz = pixclk_khz / 4;
+
+	if (dccg->ref_dtbclk_khz && req_dtbclk_khz) {
+		uint32_t modulo, phase;
+
+		// phase / modulo = dtbclk / dtbclk ref
+		modulo = 0xffffffff;
+		phase = (((unsigned long long)modulo * req_dtbclk_khz) + dccg->ref_dtbclk_khz - 1) / dccg->ref_dtbclk_khz;
+
+		REG_WRITE(DTBCLK_DTO_MODULO[otg_inst], modulo);
+		REG_WRITE(DTBCLK_DTO_PHASE[otg_inst], phase);
+
+		REG_UPDATE(OTG_PIXEL_RATE_CNTL[otg_inst],
+				DTBCLK_DTO_ENABLE[otg_inst], 1);
+
+		REG_WAIT(OTG_PIXEL_RATE_CNTL[otg_inst],
+				DTBCLKDTO_ENABLE_STATUS[otg_inst], 1,
+				1, 100);
+
+		/* program OTG_PIXEL_RATE_DIV for DIVK1 and DIVK2 fields */
+		dccg32_set_pixel_rate_div(dccg, otg_inst, PIXEL_RATE_DIV_BY_1, PIXEL_RATE_DIV_BY_1);
+
+		/* The recommended programming sequence to enable DTBCLK DTO to generate
+		 * valid pixel HPO DPSTREAM ENCODER, specifies that DTO source select should
+		 * be set only after DTO is enabled
+		 */
+		REG_UPDATE(OTG_PIXEL_RATE_CNTL[otg_inst],
+				PIPE_DTO_SRC_SEL[otg_inst], 2);
+
+		dccg->dtbclk_khz[otg_inst] = req_dtbclk_khz;
+	} else {
+		REG_UPDATE_2(OTG_PIXEL_RATE_CNTL[otg_inst],
+				DTBCLK_DTO_ENABLE[otg_inst], 0,
+				PIPE_DTO_SRC_SEL[otg_inst], 1);
+
+		REG_WRITE(DTBCLK_DTO_MODULO[otg_inst], 0);
+		REG_WRITE(DTBCLK_DTO_PHASE[otg_inst], 0);
+
+		dccg->dtbclk_khz[otg_inst] = 0;
+	}
+}
+
+static void dccg32_get_dccg_ref_freq(struct dccg *dccg,
+		unsigned int xtalin_freq_inKhz,
+		unsigned int *dccg_ref_freq_inKhz)
+{
+	/*
+	 * Assume refclk is sourced from xtalin
+	 * expect 100MHz
+	 */
+	*dccg_ref_freq_inKhz = xtalin_freq_inKhz;
+	return;
+}
+
+void dccg32_set_dpstreamclk(
+		struct dccg *dccg,
+		enum streamclk_source src,
+		int otg_inst)
+{
+	struct dcn_dccg *dccg_dcn = TO_DCN_DCCG(dccg);
+
+	/* set the dtbclk_p source */
+	dccg32_set_dtbclk_p_src(dccg, src, otg_inst);
+
+	/* enabled to select one of the DTBCLKs for pipe */
+	switch (otg_inst)
+	{
+	case 0:
+		REG_UPDATE_2(DPSTREAMCLK_CNTL,
+			     DPSTREAMCLK0_EN,
+			     (src == REFCLK) ? 0 : 1, DPSTREAMCLK0_SRC_SEL, 0);
+		break;
+	case 1:
+		REG_UPDATE_2(DPSTREAMCLK_CNTL, DPSTREAMCLK1_EN,
+			     (src == REFCLK) ? 0 : 1, DPSTREAMCLK1_SRC_SEL, 1);
+		break;
+	case 2:
+		REG_UPDATE_2(DPSTREAMCLK_CNTL, DPSTREAMCLK2_EN,
+			     (src == REFCLK) ? 0 : 1, DPSTREAMCLK2_SRC_SEL, 2);
+		break;
+	case 3:
+		REG_UPDATE_2(DPSTREAMCLK_CNTL, DPSTREAMCLK3_EN,
+			     (src == REFCLK) ? 0 : 1, DPSTREAMCLK3_SRC_SEL, 3);
+		break;
+	default:
+		BREAK_TO_DEBUGGER();
+		return;
+	}
+}
+
+void dccg32_otg_add_pixel(struct dccg *dccg,
+		uint32_t otg_inst)
+{
+	struct dcn_dccg *dccg_dcn = TO_DCN_DCCG(dccg);
+
+	REG_UPDATE(OTG_PIXEL_RATE_CNTL[otg_inst],
+			OTG_ADD_PIXEL[otg_inst], 1);
+}
+
+void dccg32_otg_drop_pixel(struct dccg *dccg,
+		uint32_t otg_inst)
+{
+	struct dcn_dccg *dccg_dcn = TO_DCN_DCCG(dccg);
+
+	REG_UPDATE(OTG_PIXEL_RATE_CNTL[otg_inst],
+			OTG_DROP_PIXEL[otg_inst], 1);
+}
+
+static const struct dccg_funcs dccg32_funcs = {
+	.update_dpp_dto = dccg2_update_dpp_dto,
+	.get_dccg_ref_freq = dccg32_get_dccg_ref_freq,
+	.dccg_init = dccg31_init,
+	.set_dpstreamclk = dccg32_set_dpstreamclk,
+	.enable_symclk32_se = dccg31_enable_symclk32_se,
+	.disable_symclk32_se = dccg31_disable_symclk32_se,
+	.enable_symclk32_le = dccg31_enable_symclk32_le,
+	.disable_symclk32_le = dccg31_disable_symclk32_le,
+	.set_physymclk = dccg31_set_physymclk,
+	.set_dtbclk_dto = dccg32_set_dtbclk_dto,
+	.set_fifo_errdet_ovr_en = dccg2_set_fifo_errdet_ovr_en,
+	.set_audio_dtbclk_dto = dccg31_set_audio_dtbclk_dto,
+	.otg_add_pixel = dccg32_otg_add_pixel,
+	.otg_drop_pixel = dccg32_otg_drop_pixel,
+};
+
+struct dccg *dccg32_create(
+	struct dc_context *ctx,
+	const struct dccg_registers *regs,
+	const struct dccg_shift *dccg_shift,
+	const struct dccg_mask *dccg_mask)
+{
+	struct dcn_dccg *dccg_dcn = kzalloc(sizeof(*dccg_dcn), GFP_KERNEL);
+	struct dccg *base;
+
+	if (dccg_dcn == NULL) {
+		BREAK_TO_DEBUGGER();
+		return NULL;
+	}
+
+	base = &dccg_dcn->base;
+	base->ctx = ctx;
+	base->funcs = &dccg32_funcs;
+
+	dccg_dcn->regs = regs;
+	dccg_dcn->dccg_shift = dccg_shift;
+	dccg_dcn->dccg_mask = dccg_mask;
+
+	return &dccg_dcn->base;
+}