[PATCH 08/13] drm/amd/display: Synchronize displays with different timings
R, Bindu
Bindu.R at amd.com
Mon Feb 22 13:43:44 UTC 2021
[AMD Official Use Only - Internal Distribution Only]
Hi Nils,?
?Thanks for the inputs.
@ Stempen, Vladimir<mailto:Vladimir.Stempen at amd.com>,
? As the array 'prime_numbers' has constant values defined, we can mark this as static const. Would you like to change the count calculation -or- retain the same limit iteration ? All the patches would be merged to upstream by today. please suggest.
Thanks,
Bindu
________________________________
From: Nils Wallménius <nils.wallmenius at gmail.com>
Sent: Sunday, February 21, 2021 1:21 AM
To: R, Bindu <Bindu.R at amd.com>
Cc: amd-gfx at lists.freedesktop.org <amd-gfx at lists.freedesktop.org>; Stempen, Vladimir <Vladimir.Stempen at amd.com>; Brol, Eryk <Eryk.Brol at amd.com>; Li, Sun peng (Leo) <Sunpeng.Li at amd.com>; Wentland, Harry <Harry.Wentland at amd.com>; Zhuo, Qingqing <Qingqing.Zhuo at amd.com>; Siqueira, Rodrigo <Rodrigo.Siqueira at amd.com>; Jacob, Anson <Anson.Jacob at amd.com>; Pillai, Aurabindo <Aurabindo.Pillai at amd.com>; Lakha, Bhawanpreet <Bhawanpreet.Lakha at amd.com>
Subject: Re: [PATCH 08/13] drm/amd/display: Synchronize displays with different timings
Hi Bindu, an inline comment below.
Den fre 19 feb. 2021 23:16Bindu Ramamurthy <bindu.r at amd.com<mailto:bindu.r at amd.com>> skrev:
From: Vladimir Stempen <vladimir.stempen at amd.com<mailto:vladimir.stempen at amd.com>>
[why]
Vendor based fan noise improvement
[how]
Report timing synchronizable when DP streams time frame
difference is less than 0.05 percent. Adjust DP DTOs and
sync displays using MASTER_UPDATE_LOCK_DB_X_Y
Signed-off-by: Vladimir Stempen <vladimir.stempen at amd.com<mailto:vladimir.stempen at amd.com>>
Acked-by: Bindu Ramamurthy <bindu.r at amd.com<mailto:bindu.r at amd.com>>
---
drivers/gpu/drm/amd/display/dc/core/dc.c | 28 ++-
.../gpu/drm/amd/display/dc/core/dc_resource.c | 43 ++++
drivers/gpu/drm/amd/display/dc/dc.h | 3 +
drivers/gpu/drm/amd/display/dc/dc_hw_types.h | 1 +
drivers/gpu/drm/amd/display/dc/dc_stream.h | 3 +
.../drm/amd/display/dc/dce/dce_clock_source.c | 52 +++-
.../amd/display/dc/dcn10/dcn10_hw_sequencer.c | 225 ++++++++++++++++++
.../amd/display/dc/dcn10/dcn10_hw_sequencer.h | 5 +
.../gpu/drm/amd/display/dc/dcn10/dcn10_optc.h | 2 +
.../display/dc/dcn10/dcn10_stream_encoder.c | 1 -
.../gpu/drm/amd/display/dc/dcn20/dcn20_init.c | 1 +
.../gpu/drm/amd/display/dc/dcn20/dcn20_optc.c | 123 ++++++++++
.../drm/amd/display/dc/dcn20/dcn20_resource.c | 8 +-
.../dc/dcn30/dcn30_dio_stream_encoder.c | 1 -
.../gpu/drm/amd/display/dc/inc/clock_source.h | 5 +
.../amd/display/dc/inc/hw/timing_generator.h | 12 +
.../gpu/drm/amd/display/dc/inc/hw_sequencer.h | 3 +
drivers/gpu/drm/amd/display/dc/inc/resource.h | 4 +
18 files changed, 505 insertions(+), 15 deletions(-)
diff --git a/drivers/gpu/drm/amd/display/dc/core/dc.c b/drivers/gpu/drm/amd/display/dc/core/dc.c
index 2f56fa2c0bf4..39df5d2c0108 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc.c
@@ -1102,6 +1102,7 @@ static void program_timing_sync(
for (i = 0; i < pipe_count; i++) {
int group_size = 1;
+ enum timing_synchronization_type sync_type = NOT_SYNCHRONIZABLE;
struct pipe_ctx *pipe_set[MAX_PIPES];
if (!unsynced_pipes[i])
@@ -1116,10 +1117,22 @@ static void program_timing_sync(
for (j = i + 1; j < pipe_count; j++) {
if (!unsynced_pipes[j])
continue;
-
- if (resource_are_streams_timing_synchronizable(
+ if (sync_type != TIMING_SYNCHRONIZABLE &&
+ dc->hwss.enable_vblanks_synchronization &&
+ unsynced_pipes[j]->stream_res.tg->funcs->align_vblanks &&
+ resource_are_vblanks_synchronizable(
+ unsynced_pipes[j]->stream,
+ pipe_set[0]->stream)) {
+ sync_type = VBLANK_SYNCHRONIZABLE;
+ pipe_set[group_size] = unsynced_pipes[j];
+ unsynced_pipes[j] = NULL;
+ group_size++;
+ } else
+ if (sync_type != VBLANK_SYNCHRONIZABLE &&
+ resource_are_streams_timing_synchronizable(
unsynced_pipes[j]->stream,
pipe_set[0]->stream)) {
+ sync_type = TIMING_SYNCHRONIZABLE;
pipe_set[group_size] = unsynced_pipes[j];
unsynced_pipes[j] = NULL;
group_size++;
@@ -1145,7 +1158,6 @@ static void program_timing_sync(
}
}
-
for (k = 0; k < group_size; k++) {
struct dc_stream_status *status = dc_stream_get_status_from_state(ctx, pipe_set[k]->stream);
@@ -1175,8 +1187,14 @@ static void program_timing_sync(
}
if (group_size > 1) {
- dc->hwss.enable_timing_synchronization(
- dc, group_index, group_size, pipe_set);
+ if (sync_type == TIMING_SYNCHRONIZABLE) {
+ dc->hwss.enable_timing_synchronization(
+ dc, group_index, group_size, pipe_set);
+ } else
+ if (sync_type == VBLANK_SYNCHRONIZABLE) {
+ dc->hwss.enable_vblanks_synchronization(
+ dc, group_index, group_size, pipe_set);
+ }
group_index++;
}
num_group++;
diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_resource.c b/drivers/gpu/drm/amd/display/dc/core/dc_resource.c
index 0c26c2ade782..0241c9d96d7a 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc_resource.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc_resource.c
@@ -417,6 +417,49 @@ int resource_get_clock_source_reference(
return -1;
}
+bool resource_are_vblanks_synchronizable(
+ struct dc_stream_state *stream1,
+ struct dc_stream_state *stream2)
+{
+ uint32_t base60_refresh_rates[] = {10, 20, 5};
+ uint8_t i;
+ uint8_t rr_count = sizeof(base60_refresh_rates)/sizeof(base60_refresh_rates[0]);
+ int64_t frame_time_diff;
+
+ if (stream1->ctx->dc->config.vblank_alignment_dto_params &&
+ stream1->ctx->dc->config.vblank_alignment_max_frame_time_diff > 0 &&
+ dc_is_dp_signal(stream1->signal) &&
+ dc_is_dp_signal(stream2->signal) &&
+ false == stream1->has_non_synchronizable_pclk &&
+ false == stream2->has_non_synchronizable_pclk &&
+ stream1->timing.flags.VBLANK_SYNCHRONIZABLE &&
+ stream2->timing.flags.VBLANK_SYNCHRONIZABLE) {
+ /* disable refresh rates higher than 60Hz for now */
+ if (stream1->timing.pix_clk_100hz*100/stream1->timing.h_total/
+ stream1->timing.v_total > 60)
+ return false;
+ if (stream2->timing.pix_clk_100hz*100/stream2->timing.h_total/
+ stream2->timing.v_total > 60)
+ return false;
+ frame_time_diff = (int64_t)10000 *
+ stream1->timing.h_total *
+ stream1->timing.v_total *
+ stream2->timing.pix_clk_100hz /
+ stream1->timing.pix_clk_100hz /
+ stream2->timing.h_total /
+ stream2->timing.v_total;
+ for (i = 0; i < rr_count; i++) {
+ int64_t diff = (frame_time_diff * base60_refresh_rates[i]) / 10 - 10000;
+
+ if (diff < 0)
+ diff = -diff;
+ if (diff < stream1->ctx->dc->config.vblank_alignment_max_frame_time_diff)
+ return true;
+ }
+ }
+ return false;
+}
+
bool resource_are_streams_timing_synchronizable(
struct dc_stream_state *stream1,
struct dc_stream_state *stream2)
diff --git a/drivers/gpu/drm/amd/display/dc/dc.h b/drivers/gpu/drm/amd/display/dc/dc.h
index a10daf6655f9..9e631980fa1b 100644
--- a/drivers/gpu/drm/amd/display/dc/dc.h
+++ b/drivers/gpu/drm/amd/display/dc/dc.h
@@ -301,6 +301,8 @@ struct dc_config {
#if defined(CONFIG_DRM_AMD_DC_DCN)
bool clamp_min_dcfclk;
#endif
+ uint64_t vblank_alignment_dto_params;
+ uint8_t vblank_alignment_max_frame_time_diff;
};
enum visual_confirm {
@@ -528,6 +530,7 @@ struct dc_debug_options {
bool disable_dsc;
bool enable_dram_clock_change_one_display_vactive;
union mem_low_power_enable_options enable_mem_low_power;
+ bool force_vblank_alignment;
};
struct dc_debug_data {
diff --git a/drivers/gpu/drm/amd/display/dc/dc_hw_types.h b/drivers/gpu/drm/amd/display/dc/dc_hw_types.h
index b41e6367b15e..48d3ed97ead9 100644
--- a/drivers/gpu/drm/amd/display/dc/dc_hw_types.h
+++ b/drivers/gpu/drm/amd/display/dc/dc_hw_types.h
@@ -705,6 +705,7 @@ struct dc_crtc_timing_flags {
#ifndef TRIM_FSFT
uint32_t FAST_TRANSPORT: 1;
#endif
+ uint32_t VBLANK_SYNCHRONIZABLE: 1;
};
enum dc_timing_3d_format {
diff --git a/drivers/gpu/drm/amd/display/dc/dc_stream.h b/drivers/gpu/drm/amd/display/dc/dc_stream.h
index e243c01b9672..7fa998f97e7a 100644
--- a/drivers/gpu/drm/amd/display/dc/dc_stream.h
+++ b/drivers/gpu/drm/amd/display/dc/dc_stream.h
@@ -228,6 +228,9 @@ struct dc_stream_state {
uint32_t stream_id;
bool is_dsc_enabled;
union stream_update_flags update_flags;
+
+ bool has_non_synchronizable_pclk;
+ bool vblank_synchronized;
};
#define ABM_LEVEL_IMMEDIATE_DISABLE 255
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 dec58b3c42e4..6f47f9bab5ee 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
@@ -1002,15 +1002,27 @@ 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;
if (clock_source->id == CLOCK_SOURCE_ID_DP_DTO) {
clock_hz = REG_READ(PHASE[inst]);
- /* NOTE: There is agreement with VBIOS here that MODULO is
- * programmed equal to DPREFCLK, in which case PHASE will be
- * equivalent to pixel clock.
- */
- *pixel_clk_khz = clock_hz / 100;
+ if (clock_source->ctx->dc->hwss.enable_vblanks_synchronization &&
+ clock_source->ctx->dc->config.vblank_alignment_max_frame_time_diff > 0) {
+ /* NOTE: In case VBLANK syncronization is enabled, MODULO may
+ * not be programmed equal to DPREFCLK
+ */
+ modulo_hz = REG_READ(MODULO[inst]);
+ *pixel_clk_khz = ((uint64_t)clock_hz*
+ clock_source->ctx->dc->clk_mgr->dprefclk_khz*10)/
+ modulo_hz;
+ } else {
+ /* NOTE: There is agreement with VBIOS here that MODULO is
+ * programmed equal to DPREFCLK, in which case PHASE will be
+ * equivalent to pixel clock.
+ */
+ *pixel_clk_khz = clock_hz / 100;
+ }
return true;
}
@@ -1074,8 +1086,35 @@ static bool dcn20_program_pix_clk(
struct pixel_clk_params *pix_clk_params,
struct pll_settings *pll_settings)
{
+ struct dce110_clk_src *clk_src = TO_DCE110_CLK_SRC(clock_source);
+ unsigned int inst = pix_clk_params->controller_id - CONTROLLER_ID_D0;
+
dce112_program_pix_clk(clock_source, pix_clk_params, pll_settings);
+ if (clock_source->ctx->dc->hwss.enable_vblanks_synchronization &&
+ clock_source->ctx->dc->config.vblank_alignment_max_frame_time_diff > 0) {
+ /* NOTE: In case VBLANK syncronization is enabled,
+ * we need to set modulo to default DPREFCLK first
+ * dce112_program_pix_clk does not set default DPREFCLK
+ */
+ REG_WRITE(MODULO[inst],
+ clock_source->ctx->dc->clk_mgr->dprefclk_khz*1000);
+ }
+ return true;
+}
+
+static bool dcn20_override_dp_pix_clk(
+ struct clock_source *clock_source,
+ unsigned int inst,
+ unsigned int pixel_clk,
+ unsigned int ref_clk)
+{
+ struct dce110_clk_src *clk_src = TO_DCE110_CLK_SRC(clock_source);
+
+ REG_UPDATE(PIXEL_RATE_CNTL[inst], DP_DTO0_ENABLE, 0);
+ REG_WRITE(PHASE[inst], pixel_clk);
+ REG_WRITE(MODULO[inst], ref_clk);
+ REG_UPDATE(PIXEL_RATE_CNTL[inst], DP_DTO0_ENABLE, 1);
return true;
}
@@ -1083,7 +1122,8 @@ static const struct clock_source_funcs dcn20_clk_src_funcs = {
.cs_power_down = dce110_clock_source_power_down,
.program_pix_clk = dcn20_program_pix_clk,
.get_pix_clk_dividers = dce112_get_pix_clk_dividers,
- .get_pixel_clk_frequency_100hz = get_pixel_clk_frequency_100hz
+ .get_pixel_clk_frequency_100hz = get_pixel_clk_frequency_100hz,
+ .override_dp_pix_clk = dcn20_override_dp_pix_clk
};
#if defined(CONFIG_DRM_AMD_DC_DCN)
diff --git a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c
index 89912bb5014f..669cee48b0b5 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c
@@ -1851,6 +1851,225 @@ static bool wait_for_reset_trigger_to_occur(
return rc;
}
+uint64_t reduceSizeAndFraction(
+ uint64_t *numerator,
+ uint64_t *denominator,
+ bool checkUint32Bounary)
+{
+ int i;
+ bool ret = checkUint32Bounary == false;
+ uint64_t max_int32 = 0xffffffff;
+ uint64_t num, denom;
+ uint16_t prime_numbers[] = {
+ 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43,
+ 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97, 101, 103,
+ 107, 109, 113, 127, 131, 137, 139, 149, 151, 157, 163,
+ 167, 173, 179, 181, 191, 193, 197, 199, 211, 223, 227,
+ 229, 233, 239, 241, 251, 257, 263, 269, 271, 277, 281,
+ 283, 293, 307, 311, 313, 317, 331, 337, 347, 349, 353,
+ 359, 367, 373, 379, 383, 389, 397, 401, 409, 419, 421,
+ 431, 433, 439, 443, 449, 457, 461, 463, 467, 479, 487,
+ 491, 499, 503, 509, 521, 523, 541, 547, 557, 563, 569,
+ 571, 577, 587, 593, 599, 601, 607, 613, 617, 619, 631,
+ 641, 643, 647, 653, 659, 661, 673, 677, 683, 691, 701,
+ 709, 719, 727, 733, 739, 743, 751, 757, 761, 769, 773,
+ 787, 797, 809, 811, 821, 823, 827, 829, 839, 853, 857,
+ 859, 863, 877, 881, 883, 887, 907, 911, 919, 929, 937,
+ 941, 947, 953, 967, 971, 977, 983, 991, 997};
+ int count = ARRAY_SIZE(prime_numbers)/sizeof(prime_numbers[0]);
ARRAY_SIZE gives the number of elements, so this will limit iteration to the first half of the prime_numbers array. Btw, the array can be "static const".
BR
Nils
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