diff options
Diffstat (limited to 'drivers/gpu/drm/amd/display/dc/dcn20/dcn20_dccg.c')
-rw-r--r-- | drivers/gpu/drm/amd/display/dc/dcn20/dcn20_dccg.c | 159 |
1 files changed, 159 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_dccg.c b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_dccg.c new file mode 100644 index 000000000000..51a3dfe97f0e --- /dev/null +++ b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_dccg.c @@ -0,0 +1,159 @@ +/* + * Copyright 2018 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 <linux/slab.h> + +#include "reg_helper.h" +#include "core_types.h" +#include "dcn20_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 + +void dccg2_update_dpp_dto(struct dccg *dccg, int dpp_inst, int req_dppclk) +{ + struct dcn_dccg *dccg_dcn = TO_DCN_DCCG(dccg); + + if (dccg->ref_dppclk && req_dppclk) { + int ref_dppclk = dccg->ref_dppclk; + + ASSERT(req_dppclk <= ref_dppclk); + /* need to clamp to 8 bits */ + if (ref_dppclk > 0xff) { + int divider = (ref_dppclk + 0xfe) / 0xff; + + ref_dppclk /= divider; + req_dppclk = (req_dppclk + divider - 1) / divider; + if (req_dppclk > ref_dppclk) + req_dppclk = ref_dppclk; + } + REG_SET_2(DPPCLK_DTO_PARAM[dpp_inst], 0, + DPPCLK0_DTO_PHASE, req_dppclk, + DPPCLK0_DTO_MODULO, ref_dppclk); + REG_UPDATE(DPPCLK_DTO_CTRL, + DPPCLK_DTO_ENABLE[dpp_inst], 1); + } else { + REG_UPDATE(DPPCLK_DTO_CTRL, + DPPCLK_DTO_ENABLE[dpp_inst], 0); + } +} + +void dccg2_get_dccg_ref_freq(struct dccg *dccg, + unsigned int xtalin_freq_inKhz, + unsigned int *dccg_ref_freq_inKhz) +{ + struct dcn_dccg *dccg_dcn = TO_DCN_DCCG(dccg); + uint32_t clk_en = 0; + uint32_t clk_sel = 0; + + REG_GET_2(REFCLK_CNTL, REFCLK_CLOCK_EN, &clk_en, REFCLK_SRC_SEL, &clk_sel); + + if (clk_en != 0) { + // DCN20 has never been validated for non-xtalin as reference + // frequency. There's actually no way for DC to determine what + // frequency a non-xtalin source is. + ASSERT_CRITICAL(false); + } + + *dccg_ref_freq_inKhz = xtalin_freq_inKhz; + + return; +} + +void dccg2_init(struct dccg *dccg) +{ + struct dcn_dccg *dccg_dcn = TO_DCN_DCCG(dccg); + + // Fallthrough intentional to program all available dpp_dto's + switch (dccg_dcn->base.ctx->dc->res_pool->pipe_count) { + case 6: + REG_UPDATE(DPPCLK_DTO_CTRL, DPPCLK_DTO_DB_EN[5], 1); + case 5: + REG_UPDATE(DPPCLK_DTO_CTRL, DPPCLK_DTO_DB_EN[4], 1); + case 4: + REG_UPDATE(DPPCLK_DTO_CTRL, DPPCLK_DTO_DB_EN[3], 1); + case 3: + REG_UPDATE(DPPCLK_DTO_CTRL, DPPCLK_DTO_DB_EN[2], 1); + case 2: + REG_UPDATE(DPPCLK_DTO_CTRL, DPPCLK_DTO_DB_EN[1], 1); + case 1: + REG_UPDATE(DPPCLK_DTO_CTRL, DPPCLK_DTO_DB_EN[0], 1); + break; + default: + ASSERT(false); + break; + } +} + +static const struct dccg_funcs dccg2_funcs = { + .update_dpp_dto = dccg2_update_dpp_dto, + .get_dccg_ref_freq = dccg2_get_dccg_ref_freq, + .dccg_init = dccg2_init +}; + +struct dccg *dccg2_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 = &dccg2_funcs; + + dccg_dcn->regs = regs; + dccg_dcn->dccg_shift = dccg_shift; + dccg_dcn->dccg_mask = dccg_mask; + + return &dccg_dcn->base; +} + +void dcn_dccg_destroy(struct dccg **dccg) +{ + struct dcn_dccg *dccg_dcn = TO_DCN_DCCG(*dccg); + + kfree(dccg_dcn); + *dccg = NULL; +} |