2 * Copyright 2018 Advanced Micro Devices, Inc.
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5 * copy of this software and associated documentation files (the "Software"),
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7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
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9 * Software is furnished to do so, subject to the following conditions:
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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26 #include <linux/slab.h>
28 #include "reg_helper.h"
29 #include "core_types.h"
30 #include "dcn20_dccg.h"
32 #define TO_DCN_DCCG(dccg)\
33 container_of(dccg, struct dcn_dccg, base)
39 #define FN(reg_name, field_name) \
40 dccg_dcn->dccg_shift->field_name, dccg_dcn->dccg_mask->field_name
47 void dccg2_update_dpp_dto(struct dccg *dccg, int dpp_inst, int req_dppclk)
49 struct dcn_dccg *dccg_dcn = TO_DCN_DCCG(dccg);
51 if (dccg->ref_dppclk && req_dppclk) {
52 int ref_dppclk = dccg->ref_dppclk;
54 ASSERT(req_dppclk <= ref_dppclk);
55 /* need to clamp to 8 bits */
56 if (ref_dppclk > 0xff) {
57 int divider = (ref_dppclk + 0xfe) / 0xff;
59 ref_dppclk /= divider;
60 req_dppclk = (req_dppclk + divider - 1) / divider;
61 if (req_dppclk > ref_dppclk)
62 req_dppclk = ref_dppclk;
64 REG_SET_2(DPPCLK_DTO_PARAM[dpp_inst], 0,
65 DPPCLK0_DTO_PHASE, req_dppclk,
66 DPPCLK0_DTO_MODULO, ref_dppclk);
67 REG_UPDATE(DPPCLK_DTO_CTRL,
68 DPPCLK_DTO_ENABLE[dpp_inst], 1);
70 REG_UPDATE(DPPCLK_DTO_CTRL,
71 DPPCLK_DTO_ENABLE[dpp_inst], 0);
75 void dccg2_get_dccg_ref_freq(struct dccg *dccg,
76 unsigned int xtalin_freq_inKhz,
77 unsigned int *dccg_ref_freq_inKhz)
79 struct dcn_dccg *dccg_dcn = TO_DCN_DCCG(dccg);
83 REG_GET_2(REFCLK_CNTL, REFCLK_CLOCK_EN, &clk_en, REFCLK_SRC_SEL, &clk_sel);
86 // DCN20 has never been validated for non-xtalin as reference
87 // frequency. There's actually no way for DC to determine what
88 // frequency a non-xtalin source is.
89 ASSERT_CRITICAL(false);
92 *dccg_ref_freq_inKhz = xtalin_freq_inKhz;
97 void dccg2_init(struct dccg *dccg)
99 struct dcn_dccg *dccg_dcn = TO_DCN_DCCG(dccg);
101 // Fallthrough intentional to program all available dpp_dto's
102 switch (dccg_dcn->base.ctx->dc->res_pool->pipe_count) {
104 REG_UPDATE(DPPCLK_DTO_CTRL, DPPCLK_DTO_DB_EN[5], 1);
106 REG_UPDATE(DPPCLK_DTO_CTRL, DPPCLK_DTO_DB_EN[4], 1);
108 REG_UPDATE(DPPCLK_DTO_CTRL, DPPCLK_DTO_DB_EN[3], 1);
110 REG_UPDATE(DPPCLK_DTO_CTRL, DPPCLK_DTO_DB_EN[2], 1);
112 REG_UPDATE(DPPCLK_DTO_CTRL, DPPCLK_DTO_DB_EN[1], 1);
114 REG_UPDATE(DPPCLK_DTO_CTRL, DPPCLK_DTO_DB_EN[0], 1);
122 static const struct dccg_funcs dccg2_funcs = {
123 .update_dpp_dto = dccg2_update_dpp_dto,
124 .get_dccg_ref_freq = dccg2_get_dccg_ref_freq,
125 .dccg_init = dccg2_init
128 struct dccg *dccg2_create(
129 struct dc_context *ctx,
130 const struct dccg_registers *regs,
131 const struct dccg_shift *dccg_shift,
132 const struct dccg_mask *dccg_mask)
134 struct dcn_dccg *dccg_dcn = kzalloc(sizeof(*dccg_dcn), GFP_KERNEL);
137 if (dccg_dcn == NULL) {
142 base = &dccg_dcn->base;
144 base->funcs = &dccg2_funcs;
146 dccg_dcn->regs = regs;
147 dccg_dcn->dccg_shift = dccg_shift;
148 dccg_dcn->dccg_mask = dccg_mask;
150 return &dccg_dcn->base;
153 void dcn_dccg_destroy(struct dccg **dccg)
155 struct dcn_dccg *dccg_dcn = TO_DCN_DCCG(*dccg);