[PATCH 07/15] drm/amd/display: Update FIXED_VS Retimer HWSS Test Pattern Sequences
Aurabindo Pillai
aurabindo.pillai at amd.com
Wed Feb 7 20:50:42 UTC 2024
From: Michael Strauss <michael.strauss at amd.com>
[WHY]
Need to fix some broken logic and sequencing in initial commit
[HOW]
Fix logic handling override deprogramming when exiting SQ128.
Don't exit early from dp_set_hw_lane_settings for DP2/FIXED_VS case.
Move LTTPR 128b/132b check out of requires_hwss and check during
runtime, as LTTPR caps are not populated on initial call.
Add pending_test_pattern to link state to allow HWSS to set FFE overrides
on retimer TX and/or skip setting APU TX FFE depending on requested pattern.
Use updated clock source for SQ128 override sequence.
Skip HW FFE preset programming when performing test pattern overrides.
Reviewed-by: Wenjing Liu <wenjing.liu at amd.com>
Acked-by: Aurabindo Pillai <aurabindo.pillai at amd.com>
Signed-off-by: Michael Strauss <michael.strauss at amd.com>
---
drivers/gpu/drm/amd/display/dc/dc.h | 12 +++++
.../display/dc/link/accessories/link_dp_cts.c | 27 +++-------
.../hwss/link_hwss_dio_fixed_vs_pe_retimer.c | 16 +++---
.../link_hwss_hpo_fixed_vs_pe_retimer_dp.c | 51 +++++++++----------
.../display/dc/link/protocols/link_dp_phy.c | 6 ++-
.../amd/display/include/link_service_types.h | 9 ++++
6 files changed, 65 insertions(+), 56 deletions(-)
diff --git a/drivers/gpu/drm/amd/display/dc/dc.h b/drivers/gpu/drm/amd/display/dc/dc.h
index f2c27964ec1c..181144541657 100644
--- a/drivers/gpu/drm/amd/display/dc/dc.h
+++ b/drivers/gpu/drm/amd/display/dc/dc.h
@@ -1572,7 +1572,19 @@ struct dc_link {
enum engine_id dpia_preferred_eng_id;
bool test_pattern_enabled;
+ /* Pending/Current test pattern are only used to perform and track
+ * FIXED_VS retimer test pattern/lane adjustment override state.
+ * Pending allows link HWSS to differentiate PHY vs non-PHY pattern,
+ * to perform specific lane adjust overrides before setting certain
+ * PHY test patterns. In cases when lane adjust and set test pattern
+ * calls are not performed atomically (i.e. performing link training),
+ * pending_test_pattern will be invalid or contain a non-PHY test pattern
+ * and current_test_pattern will contain required context for any future
+ * set pattern/set lane adjust to transition between override state(s).
+ * */
enum dp_test_pattern current_test_pattern;
+ enum dp_test_pattern pending_test_pattern;
+
union compliance_test_state compliance_test_state;
void *priv;
diff --git a/drivers/gpu/drm/amd/display/dc/link/accessories/link_dp_cts.c b/drivers/gpu/drm/amd/display/dc/link/accessories/link_dp_cts.c
index 2d152b68a501..22b24749c9d2 100644
--- a/drivers/gpu/drm/amd/display/dc/link/accessories/link_dp_cts.c
+++ b/drivers/gpu/drm/amd/display/dc/link/accessories/link_dp_cts.c
@@ -61,22 +61,6 @@ static enum dc_link_rate get_link_rate_from_test_link_rate(uint8_t test_rate)
}
}
-static bool is_dp_phy_sqaure_pattern(enum dp_test_pattern test_pattern)
-{
- return (DP_TEST_PATTERN_SQUARE_BEGIN <= test_pattern &&
- test_pattern <= DP_TEST_PATTERN_SQUARE_END);
-}
-
-static bool is_dp_phy_pattern(enum dp_test_pattern test_pattern)
-{
- if ((DP_TEST_PATTERN_PHY_PATTERN_BEGIN <= test_pattern &&
- test_pattern <= DP_TEST_PATTERN_PHY_PATTERN_END) ||
- test_pattern == DP_TEST_PATTERN_VIDEO_MODE)
- return true;
- else
- return false;
-}
-
static void dp_retrain_link_dp_test(struct dc_link *link,
struct dc_link_settings *link_setting,
bool skip_video_pattern)
@@ -361,7 +345,7 @@ static void dp_test_send_phy_test_pattern(struct dc_link *link)
test_pattern_size);
}
- if (is_dp_phy_sqaure_pattern(test_pattern)) {
+ if (IS_DP_PHY_SQUARE_PATTERN(test_pattern)) {
test_pattern_size = 1; // Square pattern data is 1 byte (DP spec)
core_link_read_dpcd(
link,
@@ -623,6 +607,8 @@ bool dp_set_test_pattern(
if (pipe_ctx == NULL)
return false;
+ link->pending_test_pattern = test_pattern;
+
/* Reset CRTC Test Pattern if it is currently running and request is VideoMode */
if (link->test_pattern_enabled && test_pattern ==
DP_TEST_PATTERN_VIDEO_MODE) {
@@ -643,12 +629,13 @@ bool dp_set_test_pattern(
/* Reset Test Pattern state */
link->test_pattern_enabled = false;
link->current_test_pattern = test_pattern;
+ link->pending_test_pattern = DP_TEST_PATTERN_UNSUPPORTED;
return true;
}
/* Check for PHY Test Patterns */
- if (is_dp_phy_pattern(test_pattern)) {
+ if (IS_DP_PHY_PATTERN(test_pattern)) {
/* Set DPCD Lane Settings before running test pattern */
if (p_link_settings != NULL) {
if ((link->chip_caps & EXT_DISPLAY_PATH_CAPS__DP_FIXED_VS_EN) &&
@@ -681,6 +668,7 @@ bool dp_set_test_pattern(
/* Set Test Pattern state */
link->test_pattern_enabled = true;
link->current_test_pattern = test_pattern;
+ link->pending_test_pattern = DP_TEST_PATTERN_UNSUPPORTED;
if (p_link_settings != NULL)
dpcd_set_link_settings(link,
p_link_settings);
@@ -756,7 +744,7 @@ bool dp_set_test_pattern(
return false;
if (link->dpcd_caps.dpcd_rev.raw >= DPCD_REV_12) {
- if (is_dp_phy_sqaure_pattern(test_pattern))
+ if (IS_DP_PHY_SQUARE_PATTERN(test_pattern))
core_link_write_dpcd(link,
DP_LINK_SQUARE_PATTERN,
p_custom_pattern,
@@ -884,6 +872,7 @@ bool dp_set_test_pattern(
/* Set Test Pattern state */
link->test_pattern_enabled = true;
link->current_test_pattern = test_pattern;
+ link->pending_test_pattern = DP_TEST_PATTERN_UNSUPPORTED;
}
return true;
diff --git a/drivers/gpu/drm/amd/display/dc/link/hwss/link_hwss_dio_fixed_vs_pe_retimer.c b/drivers/gpu/drm/amd/display/dc/link/hwss/link_hwss_dio_fixed_vs_pe_retimer.c
index b659baa23147..348ea4cb832d 100644
--- a/drivers/gpu/drm/amd/display/dc/link/hwss/link_hwss_dio_fixed_vs_pe_retimer.c
+++ b/drivers/gpu/drm/amd/display/dc/link/hwss/link_hwss_dio_fixed_vs_pe_retimer.c
@@ -80,21 +80,23 @@ static bool set_dio_fixed_vs_pe_retimer_dp_link_test_pattern_override(struct dc_
const uint8_t vendor_lttpr_write_data_pg0[4] = {0x1, 0x11, 0x0, 0x0};
const uint8_t vendor_lttpr_exit_manual_automation_0[4] = {0x1, 0x11, 0x0, 0x06};
+ if (!link->dpcd_caps.lttpr_caps.main_link_channel_coding.bits.DP_128b_132b_SUPPORTED)
+ return false;
if (tp_params == NULL)
return false;
- if (link->current_test_pattern >= DP_TEST_PATTERN_SQUARE_BEGIN &&
- link->current_test_pattern <= DP_TEST_PATTERN_SQUARE_END) {
+ if (IS_DP_PHY_SQUARE_PATTERN(link->current_test_pattern))
// Deprogram overrides from previous test pattern
dp_dio_fixed_vs_pe_retimer_exit_manual_automation(link);
- }
switch (tp_params->dp_phy_pattern) {
case DP_TEST_PATTERN_80BIT_CUSTOM:
if (tp_params->custom_pattern_size == 0 || memcmp(tp_params->custom_pattern,
pltpat_custom, tp_params->custom_pattern_size) != 0)
return false;
+ hw_tp_params.custom_pattern = tp_params->custom_pattern;
+ hw_tp_params.custom_pattern_size = tp_params->custom_pattern_size;
break;
case DP_TEST_PATTERN_D102:
break;
@@ -185,13 +187,7 @@ static const struct link_hwss dio_fixed_vs_pe_retimer_link_hwss = {
bool requires_fixed_vs_pe_retimer_dio_link_hwss(const struct dc_link *link)
{
- if (!(link->chip_caps & EXT_DISPLAY_PATH_CAPS__DP_FIXED_VS_EN))
- return false;
-
- if (!link->dpcd_caps.lttpr_caps.main_link_channel_coding.bits.DP_128b_132b_SUPPORTED)
- return false;
-
- return true;
+ return (link->chip_caps & EXT_DISPLAY_PATH_CAPS__DP_FIXED_VS_EN);
}
const struct link_hwss *get_dio_fixed_vs_pe_retimer_link_hwss(void)
diff --git a/drivers/gpu/drm/amd/display/dc/link/hwss/link_hwss_hpo_fixed_vs_pe_retimer_dp.c b/drivers/gpu/drm/amd/display/dc/link/hwss/link_hwss_hpo_fixed_vs_pe_retimer_dp.c
index b621b97711b6..3e6c7be7e278 100644
--- a/drivers/gpu/drm/amd/display/dc/link/hwss/link_hwss_hpo_fixed_vs_pe_retimer_dp.c
+++ b/drivers/gpu/drm/amd/display/dc/link/hwss/link_hwss_hpo_fixed_vs_pe_retimer_dp.c
@@ -74,13 +74,16 @@ static void dp_hpo_fixed_vs_pe_retimer_set_tx_ffe(struct dc_link *link,
static void dp_hpo_fixed_vs_pe_retimer_program_override_test_pattern(struct dc_link *link,
struct encoder_set_dp_phy_pattern_param *tp_params)
{
+ uint8_t clk_src = 0x4C;
+ uint8_t pattern = 0x4F; /* SQ128 */
+
const uint8_t vendor_lttpr_write_data_pg0[4] = {0x1, 0x11, 0x0, 0x0};
- const uint8_t vendor_lttpr_write_data_pg1[4] = {0x1, 0x50, 0x50, 0x0};
- const uint8_t vendor_lttpr_write_data_pg2[4] = {0x1, 0x51, 0x50, 0x0};
+ const uint8_t vendor_lttpr_write_data_pg1[4] = {0x1, 0x50, 0x50, clk_src};
+ const uint8_t vendor_lttpr_write_data_pg2[4] = {0x1, 0x51, 0x50, clk_src};
const uint8_t vendor_lttpr_write_data_pg3[4] = {0x1, 0x10, 0x58, 0x21};
const uint8_t vendor_lttpr_write_data_pg4[4] = {0x1, 0x10, 0x59, 0x21};
- const uint8_t vendor_lttpr_write_data_pg5[4] = {0x1, 0x1C, 0x58, 0x4F};
- const uint8_t vendor_lttpr_write_data_pg6[4] = {0x1, 0x1C, 0x59, 0x4F};
+ const uint8_t vendor_lttpr_write_data_pg5[4] = {0x1, 0x1C, 0x58, pattern};
+ const uint8_t vendor_lttpr_write_data_pg6[4] = {0x1, 0x1C, 0x59, pattern};
const uint8_t vendor_lttpr_write_data_pg7[4] = {0x1, 0x30, 0x51, 0x20};
const uint8_t vendor_lttpr_write_data_pg8[4] = {0x1, 0x30, 0x52, 0x20};
const uint8_t vendor_lttpr_write_data_pg9[4] = {0x1, 0x30, 0x54, 0x20};
@@ -123,18 +126,20 @@ static bool dp_hpo_fixed_vs_pe_retimer_set_override_test_pattern(struct dc_link
struct encoder_set_dp_phy_pattern_param hw_tp_params = { 0 };
const uint8_t vendor_lttpr_exit_manual_automation_0[4] = {0x1, 0x11, 0x0, 0x06};
+ if (!link->dpcd_caps.lttpr_caps.main_link_channel_coding.bits.DP_128b_132b_SUPPORTED)
+ return false;
+
if (tp_params == NULL)
return false;
- if (tp_params->dp_phy_pattern < DP_TEST_PATTERN_SQUARE_BEGIN ||
- tp_params->dp_phy_pattern > DP_TEST_PATTERN_SQUARE_END) {
+ if (!IS_DP_PHY_SQUARE_PATTERN(tp_params->dp_phy_pattern)) {
// Deprogram overrides from previously set square wave override
if (link->current_test_pattern == DP_TEST_PATTERN_80BIT_CUSTOM ||
link->current_test_pattern == DP_TEST_PATTERN_D102)
link->dc->link_srv->configure_fixed_vs_pe_retimer(link->ddc,
&vendor_lttpr_exit_manual_automation_0[0],
sizeof(vendor_lttpr_exit_manual_automation_0));
- else
+ else if (IS_DP_PHY_SQUARE_PATTERN(link->current_test_pattern))
dp_dio_fixed_vs_pe_retimer_exit_manual_automation(link);
return false;
@@ -148,8 +153,6 @@ static bool dp_hpo_fixed_vs_pe_retimer_set_override_test_pattern(struct dc_link
dp_hpo_fixed_vs_pe_retimer_program_override_test_pattern(link, tp_params);
- dp_hpo_fixed_vs_pe_retimer_set_tx_ffe(link, &link->cur_lane_setting[0]);
-
return true;
}
@@ -170,16 +173,18 @@ static void set_hpo_fixed_vs_pe_retimer_dp_lane_settings(struct dc_link *link,
const struct dc_link_settings *link_settings,
const struct dc_lane_settings lane_settings[LANE_COUNT_DP_MAX])
{
- link_res->hpo_dp_link_enc->funcs->set_ffe(
- link_res->hpo_dp_link_enc,
- link_settings,
- lane_settings[0].FFE_PRESET.raw);
-
- // FFE is programmed when retimer is programmed for SQ128, but explicit
- // programming needed here as well in case FFE-only update is requested
- if (link->current_test_pattern >= DP_TEST_PATTERN_SQUARE_BEGIN &&
- link->current_test_pattern <= DP_TEST_PATTERN_SQUARE_END)
- dp_hpo_fixed_vs_pe_retimer_set_tx_ffe(link, &lane_settings[0]);
+ // Don't update our HW FFE when outputting phy test patterns
+ if (IS_DP_PHY_PATTERN(link->pending_test_pattern)) {
+ // Directly program FIXED_VS retimer FFE for SQ128 override
+ if (IS_DP_PHY_SQUARE_PATTERN(link->pending_test_pattern)) {
+ dp_hpo_fixed_vs_pe_retimer_set_tx_ffe(link, &lane_settings[0]);
+ }
+ } else {
+ link_res->hpo_dp_link_enc->funcs->set_ffe(
+ link_res->hpo_dp_link_enc,
+ link_settings,
+ lane_settings[0].FFE_PRESET.raw);
+ }
}
static void enable_hpo_fixed_vs_pe_retimer_dp_link_output(struct dc_link *link,
@@ -214,13 +219,7 @@ static const struct link_hwss hpo_fixed_vs_pe_retimer_dp_link_hwss = {
bool requires_fixed_vs_pe_retimer_hpo_link_hwss(const struct dc_link *link)
{
- if (!(link->chip_caps & EXT_DISPLAY_PATH_CAPS__DP_FIXED_VS_EN))
- return false;
-
- if (!link->dpcd_caps.lttpr_caps.main_link_channel_coding.bits.DP_128b_132b_SUPPORTED)
- return false;
-
- return true;
+ return requires_fixed_vs_pe_retimer_dio_link_hwss(link);
}
const struct link_hwss *get_hpo_fixed_vs_pe_retimer_dp_link_hwss(void)
diff --git a/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_phy.c b/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_phy.c
index 0050e0a06cbc..2fa4e64e2430 100644
--- a/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_phy.c
+++ b/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_phy.c
@@ -37,6 +37,7 @@
#include "clk_mgr.h"
#include "resource.h"
#include "link_enc_cfg.h"
+#include "atomfirmware.h"
#define DC_LOGGER \
link->ctx->logger
@@ -100,8 +101,11 @@ void dp_set_hw_lane_settings(
{
const struct link_hwss *link_hwss = get_link_hwss(link, link_res);
+ // Don't return here if using FIXED_VS link HWSS and encoding is 128b/132b
if ((link_settings->lttpr_mode == LTTPR_MODE_NON_TRANSPARENT) &&
- !is_immediate_downstream(link, offset))
+ !is_immediate_downstream(link, offset) &&
+ (!(link->chip_caps & EXT_DISPLAY_PATH_CAPS__DP_FIXED_VS_EN) ||
+ link_dp_get_encoding_format(&link_settings->link_settings) == DP_8b_10b_ENCODING))
return;
if (link_hwss->ext.set_dp_lane_settings)
diff --git a/drivers/gpu/drm/amd/display/include/link_service_types.h b/drivers/gpu/drm/amd/display/include/link_service_types.h
index 1b8ab20f1715..92dbff22a7c6 100644
--- a/drivers/gpu/drm/amd/display/include/link_service_types.h
+++ b/drivers/gpu/drm/amd/display/include/link_service_types.h
@@ -169,6 +169,15 @@ enum dp_test_pattern {
DP_TEST_PATTERN_UNSUPPORTED
};
+#define IS_DP_PHY_SQUARE_PATTERN(test_pattern)\
+ (DP_TEST_PATTERN_SQUARE_BEGIN <= test_pattern &&\
+ test_pattern <= DP_TEST_PATTERN_SQUARE_END)
+
+#define IS_DP_PHY_PATTERN(test_pattern)\
+ ((DP_TEST_PATTERN_PHY_PATTERN_BEGIN <= test_pattern &&\
+ test_pattern <= DP_TEST_PATTERN_PHY_PATTERN_END) ||\
+ test_pattern == DP_TEST_PATTERN_VIDEO_MODE)
+
enum dp_test_pattern_color_space {
DP_TEST_PATTERN_COLOR_SPACE_RGB,
DP_TEST_PATTERN_COLOR_SPACE_YCBCR601,
--
2.43.0
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