/*
* 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 "core_types.h"
#include "clk_mgr_internal.h"
#include "dce112/dce112_clk_mgr.h"
#include "dce110/dce110_clk_mgr.h"
#include "dce120_clk_mgr.h"
#include "dce100/dce_clk_mgr.h"
#include "dce120/dce120_hwseq.h"
static const struct state_dependent_clocks dce120_max_clks_by_state[] = {
/*ClocksStateInvalid - should not be used*/
{ .display_clk_khz = 0, .pixel_clk_khz = 0 },
/*ClocksStateUltraLow - currently by HW design team not supposed to be used*/
{ .display_clk_khz = 0, .pixel_clk_khz = 0 },
/*ClocksStateLow*/
{ .display_clk_khz = 460000, .pixel_clk_khz = 400000 },
/*ClocksStateNominal*/
{ .display_clk_khz = 670000, .pixel_clk_khz = 600000 },
/*ClocksStatePerformance*/
{ .display_clk_khz = 1133000, .pixel_clk_khz = 600000 } };
/**
* dce121_clock_patch_xgmi_ss_info() - Save XGMI spread spectrum info
* @clk_mgr_dce: clock manager internal structure
*
* Reads from VBIOS the XGMI spread spectrum info and saves it within
* the dce clock manager. This operation will overwrite the existing dprefclk
* SS values if the vBIOS query succeeds. Otherwise, it does nothing. It also
* sets the ->xgmi_enabled flag.
*/
static void dce121_clock_patch_xgmi_ss_info(struct clk_mgr_internal *clk_mgr_dce)
{
enum bp_result result;
struct spread_spectrum_info info = { { 0 } };
struct dc_bios *bp = clk_mgr_dce->base.ctx->dc_bios;
clk_mgr_dce->xgmi_enabled = false;
result = bp->funcs->get_spread_spectrum_info(bp, AS_SIGNAL_TYPE_XGMI,
0, &info);
if (result == BP_RESULT_OK && info.spread_spectrum_percentage != 0) {
clk_mgr_dce->xgmi_enabled = true;
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 dce12_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_clock_for_voltage_req clock_voltage_req = {0};
int max_pix_clk = dce_get_max_pixel_clock_for_all_paths(context);
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;
if (should_set_clock(safe_to_lower, patched_disp_clk, clk_mgr_base->clks.dispclk_khz)) {
clock_voltage_req.clk_type = DM_PP_CLOCK_TYPE_DISPLAY_CLK;
/*
* When xGMI is enabled, the display clk needs to be adjusted
* with the WAFL link's SS percentage.
*/
if (clk_mgr_dce->xgmi_enabled)
patched_disp_clk = dce_adjust_dp_ref_freq_for_ss(
clk_mgr_dce, patched_disp_clk);
clock_voltage_req.clocks_in_khz = patched_disp_clk;
clk_mgr_base->clks.dispclk_khz = dce112_set_clock(clk_mgr_base, patched_disp_clk);
dm_pp_apply_clock_for_voltage_request(clk_mgr_base->ctx, &clock_voltage_req);
}
if (should_set_clock(safe_to_lower, max_pix_clk, clk_mgr_base->clks.phyclk_khz)) {
clock_voltage_req.clk_type = DM_PP_CLOCK_TYPE_DISPLAYPHYCLK;
clock_voltage_req.clocks_in_khz = max_pix_clk;
clk_mgr_base->clks.phyclk_khz = max_pix_clk;
dm_pp_apply_clock_for_voltage_request(clk_mgr_base->ctx, &clock_voltage_req);
}
dce11_pplib_apply_display_requirements(clk_mgr_base->ctx->dc, context);
}
static struct clk_mgr_funcs dce120_funcs = {
.get_dp_ref_clk_frequency = dce12_get_dp_ref_freq_khz,
.update_clocks = dce12_update_clocks
};
void dce120_clk_mgr_construct(struct dc_context *ctx, struct clk_mgr_internal *clk_mgr)
{
dce_clk_mgr_construct(ctx, clk_mgr);
memcpy(clk_mgr->max_clks_by_state,
dce120_max_clks_by_state,
sizeof(dce120_max_clks_by_state));
clk_mgr->base.dprefclk_khz = 600000;
clk_mgr->base.funcs = &dce120_funcs;
}
void dce121_clk_mgr_construct(struct dc_context *ctx, struct clk_mgr_internal *clk_mgr)
{
dce120_clk_mgr_construct(ctx, clk_mgr);
clk_mgr->base.dprefclk_khz = 625000;
/*
* The xGMI enabled info is used to determine if audio and display
* clocks need to be adjusted with the WAFL link's SS info.
*/
if (dce121_xgmi_enabled(ctx->dc->hwseq))
dce121_clock_patch_xgmi_ss_info(clk_mgr);
}
Codebase Browser
linux