diff options
Diffstat (limited to 'drivers/gpu/drm/amd/display/dc/clk_mgr/dce100/dce_clk_mgr.c')
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/clk_mgr/dce100/dce_clk_mgr.c | 471 |
1 files changed, 471 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/clk_mgr/dce100/dce_clk_mgr.c b/drivers/gpu/drm/amd/display/dc/clk_mgr/dce100/dce_clk_mgr.c new file mode 100644 index 000000000000..814450fefffa --- /dev/null +++ b/drivers/gpu/drm/amd/display/dc/clk_mgr/dce100/dce_clk_mgr.c @@ -0,0 +1,471 @@ +/* + * Copyright 2012-16 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 "dccg.h" +#include "clk_mgr_internal.h" +#include "dce_clk_mgr.h" +#include "dce110/dce110_clk_mgr.h" +#include "dce112/dce112_clk_mgr.h" +#include "reg_helper.h" +#include "dmcu.h" +#include "core_types.h" +#include "dal_asic_id.h" + +/* + * Currently the register shifts and masks in this file are used for dce100 and dce80 + * which has identical definitions. + * TODO: remove this when DPREFCLK_CNTL and dpref DENTIST_DISPCLK_CNTL + * is moved to dccg, where it belongs + */ +#include "dce/dce_8_0_d.h" +#include "dce/dce_8_0_sh_mask.h" + +#define REG(reg) \ + (clk_mgr->regs->reg) + +#undef FN +#define FN(reg_name, field_name) \ + clk_mgr->clk_mgr_shift->field_name, clk_mgr->clk_mgr_mask->field_name + +static const struct clk_mgr_registers disp_clk_regs = { + CLK_COMMON_REG_LIST_DCE_BASE() +}; + +static const struct clk_mgr_shift disp_clk_shift = { + CLK_COMMON_MASK_SH_LIST_DCE_COMMON_BASE(__SHIFT) +}; + +static const struct clk_mgr_mask disp_clk_mask = { + CLK_COMMON_MASK_SH_LIST_DCE_COMMON_BASE(_MASK) +}; + + +/* Max clock values for each state indexed by "enum clocks_state": */ +static const struct state_dependent_clocks dce80_max_clks_by_state[] = { +/* ClocksStateInvalid - should not be used */ +{ .display_clk_khz = 0, .pixel_clk_khz = 0 }, +/* ClocksStateUltraLow - not expected to be used for DCE 8.0 */ +{ .display_clk_khz = 0, .pixel_clk_khz = 0 }, +/* ClocksStateLow */ +{ .display_clk_khz = 352000, .pixel_clk_khz = 330000}, +/* ClocksStateNominal */ +{ .display_clk_khz = 600000, .pixel_clk_khz = 400000 }, +/* ClocksStatePerformance */ +{ .display_clk_khz = 600000, .pixel_clk_khz = 400000 } }; + +int dentist_get_divider_from_did(int did) +{ + if (did < DENTIST_BASE_DID_1) + did = DENTIST_BASE_DID_1; + if (did > DENTIST_MAX_DID) + did = DENTIST_MAX_DID; + + if (did < DENTIST_BASE_DID_2) { + return DENTIST_DIVIDER_RANGE_1_START + DENTIST_DIVIDER_RANGE_1_STEP + * (did - DENTIST_BASE_DID_1); + } else if (did < DENTIST_BASE_DID_3) { + return DENTIST_DIVIDER_RANGE_2_START + DENTIST_DIVIDER_RANGE_2_STEP + * (did - DENTIST_BASE_DID_2); + } else if (did < DENTIST_BASE_DID_4) { + return DENTIST_DIVIDER_RANGE_3_START + DENTIST_DIVIDER_RANGE_3_STEP + * (did - DENTIST_BASE_DID_3); + } else { + return DENTIST_DIVIDER_RANGE_4_START + DENTIST_DIVIDER_RANGE_4_STEP + * (did - DENTIST_BASE_DID_4); + } +} + +/* SW will adjust DP REF Clock average value for all purposes + * (DP DTO / DP Audio DTO and DP GTC) + if clock is spread for all cases: + -if SS enabled on DP Ref clock and HW de-spreading enabled with SW + calculations for DS_INCR/DS_MODULO (this is planned to be default case) + -if SS enabled on DP Ref clock and HW de-spreading enabled with HW + calculations (not planned to be used, but average clock should still + be valid) + -if SS enabled on DP Ref clock and HW de-spreading disabled + (should not be case with CIK) then SW should program all rates + generated according to average value (case as with previous ASICs) + */ + +int dce_adjust_dp_ref_freq_for_ss(struct clk_mgr_internal *clk_mgr_dce, int dp_ref_clk_khz) +{ + if (clk_mgr_dce->ss_on_dprefclk && clk_mgr_dce->dprefclk_ss_divider != 0) { + struct fixed31_32 ss_percentage = dc_fixpt_div_int( + dc_fixpt_from_fraction(clk_mgr_dce->dprefclk_ss_percentage, + clk_mgr_dce->dprefclk_ss_divider), 200); + struct fixed31_32 adj_dp_ref_clk_khz; + + ss_percentage = dc_fixpt_sub(dc_fixpt_one, ss_percentage); + adj_dp_ref_clk_khz = dc_fixpt_mul_int(ss_percentage, dp_ref_clk_khz); + dp_ref_clk_khz = dc_fixpt_floor(adj_dp_ref_clk_khz); + } + return dp_ref_clk_khz; +} + +int dce_get_dp_ref_freq_khz(struct clk_mgr *clk_mgr_base) +{ + struct clk_mgr_internal *clk_mgr = TO_CLK_MGR_INTERNAL(clk_mgr_base); + int dprefclk_wdivider; + int dprefclk_src_sel; + int dp_ref_clk_khz = 600000; + int target_div; + + /* ASSERT DP Reference Clock source is from DFS*/ + REG_GET(DPREFCLK_CNTL, DPREFCLK_SRC_SEL, &dprefclk_src_sel); + ASSERT(dprefclk_src_sel == 0); + + /* Read the mmDENTIST_DISPCLK_CNTL to get the currently + * programmed DID DENTIST_DPREFCLK_WDIVIDER*/ + REG_GET(DENTIST_DISPCLK_CNTL, DENTIST_DPREFCLK_WDIVIDER, &dprefclk_wdivider); + + /* Convert DENTIST_DPREFCLK_WDIVIDERto actual divider*/ + target_div = dentist_get_divider_from_did(dprefclk_wdivider); + + /* Calculate the current DFS clock, in kHz.*/ + dp_ref_clk_khz = (DENTIST_DIVIDER_RANGE_SCALE_FACTOR + * clk_mgr->dentist_vco_freq_khz) / target_div; + + return dce_adjust_dp_ref_freq_for_ss(clk_mgr, dp_ref_clk_khz); +} + +int dce12_get_dp_ref_freq_khz(struct clk_mgr *clk_mgr_base) +{ + struct clk_mgr_internal *clk_mgr_dce = TO_CLK_MGR_INTERNAL(clk_mgr_base); + + return dce_adjust_dp_ref_freq_for_ss(clk_mgr_dce, clk_mgr_base->dprefclk_khz); +} + +/* unit: in_khz before mode set, get pixel clock from context. ASIC register + * may not be programmed yet + */ +uint32_t dce_get_max_pixel_clock_for_all_paths(struct dc_state *context) +{ + uint32_t max_pix_clk = 0; + int i; + + for (i = 0; i < MAX_PIPES; i++) { + struct pipe_ctx *pipe_ctx = &context->res_ctx.pipe_ctx[i]; + + if (pipe_ctx->stream == NULL) + continue; + + /* do not check under lay */ + if (pipe_ctx->top_pipe) + continue; + + if (pipe_ctx->stream_res.pix_clk_params.requested_pix_clk_100hz / 10 > max_pix_clk) + max_pix_clk = pipe_ctx->stream_res.pix_clk_params.requested_pix_clk_100hz / 10; + + /* raise clock state for HBR3/2 if required. Confirmed with HW DCE/DPCS + * logic for HBR3 still needs Nominal (0.8V) on VDDC rail + */ + if (dc_is_dp_signal(pipe_ctx->stream->signal) && + pipe_ctx->stream_res.pix_clk_params.requested_sym_clk > max_pix_clk) + max_pix_clk = pipe_ctx->stream_res.pix_clk_params.requested_sym_clk; + } + + return max_pix_clk; +} + +enum dm_pp_clocks_state dce_get_required_clocks_state( + struct clk_mgr *clk_mgr_base, + struct dc_state *context) +{ + struct clk_mgr_internal *clk_mgr_dce = TO_CLK_MGR_INTERNAL(clk_mgr_base); + int i; + enum dm_pp_clocks_state low_req_clk; + int max_pix_clk = dce_get_max_pixel_clock_for_all_paths(context); + + /* Iterate from highest supported to lowest valid state, and update + * lowest RequiredState with the lowest state that satisfies + * all required clocks + */ + for (i = clk_mgr_dce->max_clks_state; i >= DM_PP_CLOCKS_STATE_ULTRA_LOW; i--) + if (context->bw_ctx.bw.dce.dispclk_khz > + clk_mgr_dce->max_clks_by_state[i].display_clk_khz + || max_pix_clk > + clk_mgr_dce->max_clks_by_state[i].pixel_clk_khz) + break; + + low_req_clk = i + 1; + if (low_req_clk > clk_mgr_dce->max_clks_state) { + /* set max clock state for high phyclock, invalid on exceeding display clock */ + if (clk_mgr_dce->max_clks_by_state[clk_mgr_dce->max_clks_state].display_clk_khz + < context->bw_ctx.bw.dce.dispclk_khz) + low_req_clk = DM_PP_CLOCKS_STATE_INVALID; + else + low_req_clk = clk_mgr_dce->max_clks_state; + } + + return low_req_clk; +} + + +/* TODO: remove use the two broken down functions */ +int dce_set_clock( + struct clk_mgr *clk_mgr_base, + int requested_clk_khz) +{ + struct clk_mgr_internal *clk_mgr_dce = TO_CLK_MGR_INTERNAL(clk_mgr_base); + struct bp_pixel_clock_parameters pxl_clk_params = { 0 }; + struct dc_bios *bp = clk_mgr_base->ctx->dc_bios; + int actual_clock = requested_clk_khz; + struct dmcu *dmcu = clk_mgr_dce->base.ctx->dc->res_pool->dmcu; + + /* Make sure requested clock isn't lower than minimum threshold*/ + if (requested_clk_khz > 0) + requested_clk_khz = max(requested_clk_khz, + clk_mgr_dce->dentist_vco_freq_khz / 64); + + /* Prepare to program display clock*/ + pxl_clk_params.target_pixel_clock_100hz = requested_clk_khz * 10; + pxl_clk_params.pll_id = CLOCK_SOURCE_ID_DFS; + + if (clk_mgr_dce->dfs_bypass_active) + pxl_clk_params.flags.SET_DISPCLK_DFS_BYPASS = true; + + bp->funcs->program_display_engine_pll(bp, &pxl_clk_params); + + if (clk_mgr_dce->dfs_bypass_active) { + /* Cache the fixed display clock*/ + clk_mgr_dce->dfs_bypass_disp_clk = + pxl_clk_params.dfs_bypass_display_clock; + actual_clock = pxl_clk_params.dfs_bypass_display_clock; + } + + /* from power down, we need mark the clock state as ClocksStateNominal + * from HWReset, so when resume we will call pplib voltage regulator.*/ + if (requested_clk_khz == 0) + clk_mgr_dce->cur_min_clks_state = DM_PP_CLOCKS_STATE_NOMINAL; + + if (dmcu && dmcu->funcs->is_dmcu_initialized(dmcu)) + dmcu->funcs->set_psr_wait_loop(dmcu, actual_clock / 1000 / 7); + + return actual_clock; +} + + +static void dce_clock_read_integrated_info(struct clk_mgr_internal *clk_mgr_dce) +{ + struct dc_debug_options *debug = &clk_mgr_dce->base.ctx->dc->debug; + struct dc_bios *bp = clk_mgr_dce->base.ctx->dc_bios; + struct integrated_info info = { { { 0 } } }; + struct dc_firmware_info fw_info = { { 0 } }; + int i; + + if (bp->integrated_info) + info = *bp->integrated_info; + + clk_mgr_dce->dentist_vco_freq_khz = info.dentist_vco_freq; + if (clk_mgr_dce->dentist_vco_freq_khz == 0) { + bp->funcs->get_firmware_info(bp, &fw_info); + clk_mgr_dce->dentist_vco_freq_khz = + fw_info.smu_gpu_pll_output_freq; + if (clk_mgr_dce->dentist_vco_freq_khz == 0) + clk_mgr_dce->dentist_vco_freq_khz = 3600000; + } + + /*update the maximum display clock for each power state*/ + for (i = 0; i < NUMBER_OF_DISP_CLK_VOLTAGE; ++i) { + enum dm_pp_clocks_state clk_state = DM_PP_CLOCKS_STATE_INVALID; + + switch (i) { + case 0: + clk_state = DM_PP_CLOCKS_STATE_ULTRA_LOW; + break; + + case 1: + clk_state = DM_PP_CLOCKS_STATE_LOW; + break; + + case 2: + clk_state = DM_PP_CLOCKS_STATE_NOMINAL; + break; + + case 3: + clk_state = DM_PP_CLOCKS_STATE_PERFORMANCE; + break; + + default: + clk_state = DM_PP_CLOCKS_STATE_INVALID; + break; + } + + /*Do not allow bad VBIOS/SBIOS to override with invalid values, + * check for > 100MHz*/ + if (info.disp_clk_voltage[i].max_supported_clk >= 100000) + clk_mgr_dce->max_clks_by_state[clk_state].display_clk_khz = + info.disp_clk_voltage[i].max_supported_clk; + } + + if (!debug->disable_dfs_bypass && bp->integrated_info) + if (bp->integrated_info->gpu_cap_info & DFS_BYPASS_ENABLE) + clk_mgr_dce->dfs_bypass_enabled = true; +} + +void dce_clock_read_ss_info(struct clk_mgr_internal *clk_mgr_dce) +{ + struct dc_bios *bp = clk_mgr_dce->base.ctx->dc_bios; + int ss_info_num = bp->funcs->get_ss_entry_number( + bp, AS_SIGNAL_TYPE_GPU_PLL); + + if (ss_info_num) { + struct spread_spectrum_info info = { { 0 } }; + enum bp_result result = bp->funcs->get_spread_spectrum_info( + bp, AS_SIGNAL_TYPE_GPU_PLL, 0, &info); + + /* Based on VBIOS, VBIOS will keep entry for GPU PLL SS + * even if SS not enabled and in that case + * SSInfo.spreadSpectrumPercentage !=0 would be sign + * that SS is enabled + */ + if (result == BP_RESULT_OK && + info.spread_spectrum_percentage != 0) { + clk_mgr_dce->ss_on_dprefclk = true; + clk_mgr_dce->dprefclk_ss_divider = info.spread_percentage_divider; + + if (info.type.CENTER_MODE == 0) { + /* TODO: Currently for DP Reference clock we + * need only SS percentage for + * downspread */ + clk_mgr_dce->dprefclk_ss_percentage = + info.spread_spectrum_percentage; + } + + return; + } + + result = bp->funcs->get_spread_spectrum_info( + bp, AS_SIGNAL_TYPE_DISPLAY_PORT, 0, &info); + + /* Based on VBIOS, VBIOS will keep entry for DPREFCLK SS + * even if SS not enabled and in that case + * SSInfo.spreadSpectrumPercentage !=0 would be sign + * that SS is enabled + */ + if (result == BP_RESULT_OK && + info.spread_spectrum_percentage != 0) { + clk_mgr_dce->ss_on_dprefclk = true; + clk_mgr_dce->dprefclk_ss_divider = info.spread_percentage_divider; + + if (info.type.CENTER_MODE == 0) { + /* Currently for DP Reference clock we + * need only SS percentage for + * downspread */ + clk_mgr_dce->dprefclk_ss_percentage = + info.spread_spectrum_percentage; + } + } + } +} + +static void dce_pplib_apply_display_requirements( + struct dc *dc, + struct dc_state *context) +{ + struct dm_pp_display_configuration *pp_display_cfg = &context->pp_display_cfg; + + pp_display_cfg->avail_mclk_switch_time_us = dce110_get_min_vblank_time_us(context); + + dce110_fill_display_configs(context, pp_display_cfg); + + if (memcmp(&dc->current_state->pp_display_cfg, pp_display_cfg, sizeof(*pp_display_cfg)) != 0) + dm_pp_apply_display_requirements(dc->ctx, pp_display_cfg); +} + +static void dce_update_clocks(struct clk_mgr *clk_mgr_base, + struct dc_state *context, + bool safe_to_lower) +{ + struct clk_mgr_internal *clk_mgr_dce = TO_CLK_MGR_INTERNAL(clk_mgr_base); + struct dm_pp_power_level_change_request level_change_req; + int patched_disp_clk = context->bw_ctx.bw.dce.dispclk_khz; + + /*TODO: W/A for dal3 linux, investigate why this works */ + if (!clk_mgr_dce->dfs_bypass_active) + patched_disp_clk = patched_disp_clk * 115 / 100; + + level_change_req.power_level = dce_get_required_clocks_state(clk_mgr_base, context); + /* get max clock state from PPLIB */ + if ((level_change_req.power_level < clk_mgr_dce->cur_min_clks_state && safe_to_lower) + || level_change_req.power_level > clk_mgr_dce->cur_min_clks_state) { + if (dm_pp_apply_power_level_change_request(clk_mgr_base->ctx, &level_change_req)) + clk_mgr_dce->cur_min_clks_state = level_change_req.power_level; + } + + if (should_set_clock(safe_to_lower, patched_disp_clk, clk_mgr_base->clks.dispclk_khz)) { + patched_disp_clk = dce_set_clock(clk_mgr_base, patched_disp_clk); + clk_mgr_base->clks.dispclk_khz = patched_disp_clk; + } + dce_pplib_apply_display_requirements(clk_mgr_base->ctx->dc, context); +} + + + + + + + + +static struct clk_mgr_funcs dce_funcs = { + .get_dp_ref_clk_frequency = dce_get_dp_ref_freq_khz, + .update_clocks = dce_update_clocks +}; + +void dce_clk_mgr_construct( + struct dc_context *ctx, + struct clk_mgr_internal *clk_mgr) +{ + struct clk_mgr *base = &clk_mgr->base; + struct dm_pp_static_clock_info static_clk_info = {0}; + + memcpy(clk_mgr->max_clks_by_state, + dce80_max_clks_by_state, + sizeof(dce80_max_clks_by_state)); + + base->ctx = ctx; + base->funcs = &dce_funcs; + + clk_mgr->regs = &disp_clk_regs; + clk_mgr->clk_mgr_shift = &disp_clk_shift; + clk_mgr->clk_mgr_mask = &disp_clk_mask; + clk_mgr->dfs_bypass_disp_clk = 0; + + clk_mgr->dprefclk_ss_percentage = 0; + clk_mgr->dprefclk_ss_divider = 1000; + clk_mgr->ss_on_dprefclk = false; + + if (dm_pp_get_static_clocks(ctx, &static_clk_info)) + clk_mgr->max_clks_state = static_clk_info.max_clocks_state; + else + clk_mgr->max_clks_state = DM_PP_CLOCKS_STATE_NOMINAL; + clk_mgr->cur_min_clks_state = DM_PP_CLOCKS_STATE_INVALID; + + dce_clock_read_integrated_info(clk_mgr); + dce_clock_read_ss_info(clk_mgr); +} + |