[PATCH 02/10] drm/amd/display: To adjust dprefclk by down spread percentage
Rodrigo Siqueira
Rodrigo.Siqueira at amd.com
Thu Jan 4 15:50:58 UTC 2024
From: Martin Tsai <martin.tsai at amd.com>
[Why]
Panels show corruption with high refresh rate timings when ssc is
enabled.
[How]
Read down-spread percentage from lut to adjust dprefclk. Issues come
from S0i3 with this commit has been fixed by SMU.
Reviewed-by: Nicholas Kazlauskas <nicholas.kazlauskas at amd.com>
Acked-by: Rodrigo Siqueira <rodrigo.siqueira at amd.com>
Signed-off-by: Martin Tsai <martin.tsai at amd.com>
---
.../dc/clk_mgr/dcn314/dcn314_clk_mgr.c | 71 ++++++++++++++++++-
.../dc/clk_mgr/dcn314/dcn314_clk_mgr.h | 11 +++
.../gpu/drm/amd/display/dc/dce/dce_audio.c | 2 +-
.../drm/amd/display/dc/dce/dce_clock_source.c | 9 ++-
.../amd/display/dc/hwss/dce110/dce110_hwseq.c | 2 +-
.../gpu/drm/amd/display/dc/inc/hw/clk_mgr.h | 1 +
.../gpu/drm/amd/display/include/audio_types.h | 2 +-
7 files changed, 93 insertions(+), 5 deletions(-)
diff --git a/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn314/dcn314_clk_mgr.c b/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn314/dcn314_clk_mgr.c
index 757528256326..878c0e7b78ab 100644
--- a/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn314/dcn314_clk_mgr.c
+++ b/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn314/dcn314_clk_mgr.c
@@ -87,6 +87,20 @@ static const struct IP_BASE CLK_BASE = { { { { 0x00016C00, 0x02401800, 0, 0, 0,
#define CLK1_CLK_PLL_REQ__PllSpineDiv_MASK 0x0000F000L
#define CLK1_CLK_PLL_REQ__FbMult_frac_MASK 0xFFFF0000L
+#define regCLK1_CLK2_BYPASS_CNTL 0x029c
+#define regCLK1_CLK2_BYPASS_CNTL_BASE_IDX 0
+
+#define CLK1_CLK2_BYPASS_CNTL__CLK2_BYPASS_SEL__SHIFT 0x0
+#define CLK1_CLK2_BYPASS_CNTL__CLK2_BYPASS_DIV__SHIFT 0x10
+#define CLK1_CLK2_BYPASS_CNTL__CLK2_BYPASS_SEL_MASK 0x00000007L
+#define CLK1_CLK2_BYPASS_CNTL__CLK2_BYPASS_DIV_MASK 0x000F0000L
+
+#define regCLK6_0_CLK6_spll_field_8 0x464b
+#define regCLK6_0_CLK6_spll_field_8_BASE_IDX 0
+
+#define CLK6_0_CLK6_spll_field_8__spll_ssc_en__SHIFT 0xd
+#define CLK6_0_CLK6_spll_field_8__spll_ssc_en_MASK 0x00002000L
+
#define REG(reg_name) \
(CLK_BASE.instance[0].segment[reg ## reg_name ## _BASE_IDX] + reg ## reg_name)
@@ -160,6 +174,37 @@ static void dcn314_disable_otg_wa(struct clk_mgr *clk_mgr_base, struct dc_state
}
}
+bool dcn314_is_spll_ssc_enabled(struct clk_mgr *clk_mgr_base)
+{
+ struct clk_mgr_internal *clk_mgr = TO_CLK_MGR_INTERNAL(clk_mgr_base);
+ uint32_t ssc_enable;
+
+ REG_GET(CLK6_0_CLK6_spll_field_8, spll_ssc_en, &ssc_enable);
+
+ return ssc_enable == 1;
+}
+
+void dcn314_init_clocks(struct clk_mgr *clk_mgr)
+{
+ struct clk_mgr_internal *clk_mgr_int = TO_CLK_MGR_INTERNAL(clk_mgr);
+ uint32_t ref_dtbclk = clk_mgr->clks.ref_dtbclk_khz;
+
+ memset(&(clk_mgr->clks), 0, sizeof(struct dc_clocks));
+ // Assumption is that boot state always supports pstate
+ clk_mgr->clks.ref_dtbclk_khz = ref_dtbclk; // restore ref_dtbclk
+ clk_mgr->clks.p_state_change_support = true;
+ clk_mgr->clks.prev_p_state_change_support = true;
+ clk_mgr->clks.pwr_state = DCN_PWR_STATE_UNKNOWN;
+ clk_mgr->clks.zstate_support = DCN_ZSTATE_SUPPORT_UNKNOWN;
+
+ // to adjust dp_dto reference clock if ssc is enable otherwise to apply dprefclk
+ if (dcn314_is_spll_ssc_enabled(clk_mgr))
+ clk_mgr->dp_dto_source_clock_in_khz =
+ dce_adjust_dp_ref_freq_for_ss(clk_mgr_int, clk_mgr->dprefclk_khz);
+ else
+ clk_mgr->dp_dto_source_clock_in_khz = clk_mgr->dprefclk_khz;
+}
+
void dcn314_update_clocks(struct clk_mgr *clk_mgr_base,
struct dc_state *context,
bool safe_to_lower)
@@ -436,6 +481,11 @@ static DpmClocks314_t dummy_clocks;
static struct dcn314_watermarks dummy_wms = { 0 };
+static struct dcn314_ss_info_table ss_info_table = {
+ .ss_divider = 1000,
+ .ss_percentage = {0, 0, 375, 375, 375}
+};
+
static void dcn314_build_watermark_ranges(struct clk_bw_params *bw_params, struct dcn314_watermarks *table)
{
int i, num_valid_sets;
@@ -708,13 +758,31 @@ static struct clk_mgr_funcs dcn314_funcs = {
.get_dp_ref_clk_frequency = dce12_get_dp_ref_freq_khz,
.get_dtb_ref_clk_frequency = dcn31_get_dtb_ref_freq_khz,
.update_clocks = dcn314_update_clocks,
- .init_clocks = dcn31_init_clocks,
+ .init_clocks = dcn314_init_clocks,
.enable_pme_wa = dcn314_enable_pme_wa,
.are_clock_states_equal = dcn314_are_clock_states_equal,
.notify_wm_ranges = dcn314_notify_wm_ranges
};
extern struct clk_mgr_funcs dcn3_fpga_funcs;
+static void dcn314_read_ss_info_from_lut(struct clk_mgr_internal *clk_mgr)
+{
+ uint32_t clock_source;
+ //uint32_t ssc_enable;
+
+ REG_GET(CLK1_CLK2_BYPASS_CNTL, CLK2_BYPASS_SEL, &clock_source);
+ //REG_GET(CLK6_0_CLK6_spll_field_8, spll_ssc_en, &ssc_enable);
+
+ if (dcn314_is_spll_ssc_enabled(&clk_mgr->base) && (clock_source < ARRAY_SIZE(ss_info_table.ss_percentage))) {
+ clk_mgr->dprefclk_ss_percentage = ss_info_table.ss_percentage[clock_source];
+
+ if (clk_mgr->dprefclk_ss_percentage != 0) {
+ clk_mgr->ss_on_dprefclk = true;
+ clk_mgr->dprefclk_ss_divider = ss_info_table.ss_divider;
+ }
+ }
+}
+
void dcn314_clk_mgr_construct(
struct dc_context *ctx,
struct clk_mgr_dcn314 *clk_mgr,
@@ -782,6 +850,7 @@ void dcn314_clk_mgr_construct(
clk_mgr->base.base.dprefclk_khz = 600000;
clk_mgr->base.base.clks.ref_dtbclk_khz = 600000;
dce_clock_read_ss_info(&clk_mgr->base);
+ dcn314_read_ss_info_from_lut(&clk_mgr->base);
/*if bios enabled SS, driver needs to adjust dtb clock, only enable with correct bios*/
clk_mgr->base.base.bw_params = &dcn314_bw_params;
diff --git a/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn314/dcn314_clk_mgr.h b/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn314/dcn314_clk_mgr.h
index 171f84340eb2..002c28e80720 100644
--- a/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn314/dcn314_clk_mgr.h
+++ b/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn314/dcn314_clk_mgr.h
@@ -28,6 +28,8 @@
#define __DCN314_CLK_MGR_H__
#include "clk_mgr_internal.h"
+#define DCN314_NUM_CLOCK_SOURCES 5
+
struct dcn314_watermarks;
struct dcn314_smu_watermark_set {
@@ -40,9 +42,18 @@ struct clk_mgr_dcn314 {
struct dcn314_smu_watermark_set smu_wm_set;
};
+struct dcn314_ss_info_table {
+ uint32_t ss_divider;
+ uint32_t ss_percentage[DCN314_NUM_CLOCK_SOURCES];
+};
+
bool dcn314_are_clock_states_equal(struct dc_clocks *a,
struct dc_clocks *b);
+bool dcn314_is_spll_ssc_enabled(struct clk_mgr *clk_mgr_base);
+
+void dcn314_init_clocks(struct clk_mgr *clk_mgr);
+
void dcn314_update_clocks(struct clk_mgr *clk_mgr_base,
struct dc_state *context,
bool safe_to_lower);
diff --git a/drivers/gpu/drm/amd/display/dc/dce/dce_audio.c b/drivers/gpu/drm/amd/display/dc/dce/dce_audio.c
index 140598f18bbd..f0458b8f00af 100644
--- a/drivers/gpu/drm/amd/display/dc/dce/dce_audio.c
+++ b/drivers/gpu/drm/amd/display/dc/dce/dce_audio.c
@@ -782,7 +782,7 @@ static void get_azalia_clock_info_dp(
/*audio_dto_module = dpDtoSourceClockInkhz * 10,000;
* [khz] ->[100Hz] */
azalia_clock_info->audio_dto_module =
- pll_info->dp_dto_source_clock_in_khz * 10;
+ pll_info->audio_dto_source_clock_in_khz * 10;
}
void dce_aud_wall_dto_setup(
diff --git a/drivers/gpu/drm/amd/display/dc/dce/dce_clock_source.c b/drivers/gpu/drm/amd/display/dc/dce/dce_clock_source.c
index 5d3f6fa1011e..970644b695cd 100644
--- a/drivers/gpu/drm/amd/display/dc/dce/dce_clock_source.c
+++ b/drivers/gpu/drm/amd/display/dc/dce/dce_clock_source.c
@@ -975,6 +975,9 @@ static bool dcn31_program_pix_clk(
look_up_in_video_optimized_rate_tlb(pix_clk_params->requested_pix_clk_100hz / 10);
struct bp_pixel_clock_parameters bp_pc_params = {0};
enum transmitter_color_depth bp_pc_colour_depth = TRANSMITTER_COLOR_DEPTH_24;
+
+ if (clock_source->ctx->dc->clk_mgr->dp_dto_source_clock_in_khz != 0)
+ dp_dto_ref_khz = clock_source->ctx->dc->clk_mgr->dp_dto_source_clock_in_khz;
// For these signal types Driver to program DP_DTO without calling VBIOS Command table
if (dc_is_dp_signal(pix_clk_params->signal_type) || dc_is_virtual_signal(pix_clk_params->signal_type)) {
if (e) {
@@ -1088,6 +1091,10 @@ static bool get_pixel_clk_frequency_100hz(
struct dce110_clk_src *clk_src = TO_DCE110_CLK_SRC(clock_source);
unsigned int clock_hz = 0;
unsigned int modulo_hz = 0;
+ unsigned int dp_dto_ref_khz = clock_source->ctx->dc->clk_mgr->dprefclk_khz;
+
+ if (clock_source->ctx->dc->clk_mgr->dp_dto_source_clock_in_khz != 0)
+ dp_dto_ref_khz = clock_source->ctx->dc->clk_mgr->dp_dto_source_clock_in_khz;
if (clock_source->id == CLOCK_SOURCE_ID_DP_DTO) {
clock_hz = REG_READ(PHASE[inst]);
@@ -1100,7 +1107,7 @@ static bool get_pixel_clk_frequency_100hz(
modulo_hz = REG_READ(MODULO[inst]);
if (modulo_hz)
*pixel_clk_khz = div_u64((uint64_t)clock_hz*
- clock_source->ctx->dc->clk_mgr->dprefclk_khz*10,
+ dp_dto_ref_khz*10,
modulo_hz);
else
*pixel_clk_khz = 0;
diff --git a/drivers/gpu/drm/amd/display/dc/hwss/dce110/dce110_hwseq.c b/drivers/gpu/drm/amd/display/dc/hwss/dce110/dce110_hwseq.c
index d6260b8b476f..4078e6be8810 100644
--- a/drivers/gpu/drm/amd/display/dc/hwss/dce110/dce110_hwseq.c
+++ b/drivers/gpu/drm/amd/display/dc/hwss/dce110/dce110_hwseq.c
@@ -1353,7 +1353,7 @@ static void build_audio_output(
if (state->clk_mgr &&
(pipe_ctx->stream->signal == SIGNAL_TYPE_DISPLAY_PORT ||
pipe_ctx->stream->signal == SIGNAL_TYPE_DISPLAY_PORT_MST)) {
- audio_output->pll_info.dp_dto_source_clock_in_khz =
+ audio_output->pll_info.audio_dto_source_clock_in_khz =
state->clk_mgr->funcs->get_dp_ref_clk_frequency(
state->clk_mgr);
}
diff --git a/drivers/gpu/drm/amd/display/dc/inc/hw/clk_mgr.h b/drivers/gpu/drm/amd/display/dc/inc/hw/clk_mgr.h
index cbba39d251e5..17e014d3bdc8 100644
--- a/drivers/gpu/drm/amd/display/dc/inc/hw/clk_mgr.h
+++ b/drivers/gpu/drm/amd/display/dc/inc/hw/clk_mgr.h
@@ -333,6 +333,7 @@ struct clk_mgr {
bool force_smu_not_present;
bool dc_mode_softmax_enabled;
int dprefclk_khz; // Used by program pixel clock in clock source funcs, need to figureout where this goes
+ int dp_dto_source_clock_in_khz; // Used to program DP DTO with ss adjustment on DCN314
int dentist_vco_freq_khz;
struct clk_state_registers_and_bypass boot_snapshot;
struct clk_bw_params *bw_params;
diff --git a/drivers/gpu/drm/amd/display/include/audio_types.h b/drivers/gpu/drm/amd/display/include/audio_types.h
index 66a54da0641c..915a031a43cb 100644
--- a/drivers/gpu/drm/amd/display/include/audio_types.h
+++ b/drivers/gpu/drm/amd/display/include/audio_types.h
@@ -64,7 +64,7 @@ enum audio_dto_source {
/* PLL information required for AZALIA DTO calculation */
struct audio_pll_info {
- uint32_t dp_dto_source_clock_in_khz;
+ uint32_t audio_dto_source_clock_in_khz;
uint32_t feed_back_divider;
enum audio_dto_source dto_source;
bool ss_enabled;
--
2.43.0
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