From: Anson Jacob <Anson.Jacob@amd.com>
To: <amd-gfx@lists.freedesktop.org>
Cc: stylon.wang@amd.com, Jun Lei <Jun.Lei@amd.com>,
solomon.chiu@amd.com, Sunpeng.Li@amd.com, Harry.Wentland@amd.com,
qingqing.zhuo@amd.com, Rodrigo.Siqueira@amd.com,
roman.li@amd.com,
Meenakshikumar Somasundaram <meenakshikumar.somasundaram@amd.com>,
Anson.Jacob@amd.com, Aurabindo.Pillai@amd.com, wayne.lin@amd.com,
mikita.lipski@amd.com, Bhawanpreet.Lakha@amd.com,
agustin.gutierrez@amd.com, pavle.kotarac@amd.com
Subject: [PATCH 16/22] drm/amd/display: Add hpd pending flag to indicate detection of new hpd.
Date: Thu, 4 Nov 2021 16:52:09 -0400 [thread overview]
Message-ID: <20211104205215.1125899-17-Anson.Jacob@amd.com> (raw)
In-Reply-To: <20211104205215.1125899-1-Anson.Jacob@amd.com>
From: Meenakshikumar Somasundaram <meenakshikumar.somasundaram@amd.com>
[Why]
For dpia link, link->hpd_status indicates current state, but driver
fails to capture hpd transitions in certain scenarios such as during
link training.
[How]
Added link->hpd_pending flag that captures arrival of new hpd.
Reviewed-by: Jun Lei <Jun.Lei@amd.com>
Acked-by: Anson Jacob <Anson.Jacob@amd.com>
Signed-off-by: Meenakshikumar Somasundaram <meenakshikumar.somasundaram@amd.com>
---
drivers/gpu/drm/amd/display/dc/core/dc_link.c | 6 +++---
.../drm/amd/display/dc/core/dc_link_dpia.c | 20 +++++++++----------
drivers/gpu/drm/amd/display/dc/dc_link.h | 1 +
3 files changed, 14 insertions(+), 13 deletions(-)
diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link.c b/drivers/gpu/drm/amd/display/dc/core/dc_link.c
index c4944ba59ec6..2e2dcd5518da 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc_link.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc_link.c
@@ -270,10 +270,10 @@ bool dc_link_detect_sink(struct dc_link *link, enum dc_connection_type *type)
/* Link may not have physical HPD pin. */
if (link->ep_type != DISPLAY_ENDPOINT_PHY) {
- if (link->hpd_status)
- *type = dc_connection_single;
- else
+ if (link->is_hpd_pending || !link->hpd_status)
*type = dc_connection_none;
+ else
+ *type = dc_connection_single;
return true;
}
diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link_dpia.c b/drivers/gpu/drm/amd/display/dc/core/dc_link_dpia.c
index b1c9f77d6bf4..d72122593959 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc_link_dpia.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc_link_dpia.c
@@ -94,17 +94,17 @@ static enum link_training_result dpia_configure_link(struct dc_link *link,
lt_settings);
status = dpcd_configure_channel_coding(link, lt_settings);
- if (status != DC_OK && !link->hpd_status)
+ if (status != DC_OK && link->is_hpd_pending)
return LINK_TRAINING_ABORT;
/* Configure lttpr mode */
status = dpcd_configure_lttpr_mode(link, lt_settings);
- if (status != DC_OK && !link->hpd_status)
+ if (status != DC_OK && link->is_hpd_pending)
return LINK_TRAINING_ABORT;
/* Set link rate, lane count and spread. */
status = dpcd_set_link_settings(link, lt_settings);
- if (status != DC_OK && !link->hpd_status)
+ if (status != DC_OK && link->is_hpd_pending)
return LINK_TRAINING_ABORT;
if (link->preferred_training_settings.fec_enable)
@@ -112,7 +112,7 @@ static enum link_training_result dpia_configure_link(struct dc_link *link,
else
fec_enable = true;
status = dp_set_fec_ready(link, fec_enable);
- if (status != DC_OK && !link->hpd_status)
+ if (status != DC_OK && link->is_hpd_pending)
return LINK_TRAINING_ABORT;
return LINK_TRAINING_SUCCESS;
@@ -388,7 +388,7 @@ static enum link_training_result dpia_training_cr_non_transparent(struct dc_link
}
/* Abort link training if clock recovery failed due to HPD unplug. */
- if (!link->hpd_status)
+ if (link->is_hpd_pending)
result = LINK_TRAINING_ABORT;
DC_LOG_HW_LINK_TRAINING("%s\n DPIA(%d) clock recovery\n"
@@ -490,7 +490,7 @@ static enum link_training_result dpia_training_cr_transparent(struct dc_link *li
}
/* Abort link training if clock recovery failed due to HPD unplug. */
- if (!link->hpd_status)
+ if (link->is_hpd_pending)
result = LINK_TRAINING_ABORT;
DC_LOG_HW_LINK_TRAINING("%s\n DPIA(%d) clock recovery\n"
@@ -675,7 +675,7 @@ static enum link_training_result dpia_training_eq_non_transparent(struct dc_link
}
/* Abort link training if equalization failed due to HPD unplug. */
- if (!link->hpd_status)
+ if (link->is_hpd_pending)
result = LINK_TRAINING_ABORT;
DC_LOG_HW_LINK_TRAINING("%s\n DPIA(%d) equalization\n"
@@ -758,7 +758,7 @@ static enum link_training_result dpia_training_eq_transparent(struct dc_link *li
}
/* Abort link training if equalization failed due to HPD unplug. */
- if (!link->hpd_status)
+ if (link->is_hpd_pending)
result = LINK_TRAINING_ABORT;
DC_LOG_HW_LINK_TRAINING("%s\n DPIA(%d) equalization\n"
@@ -892,10 +892,10 @@ static void dpia_training_abort(struct dc_link *link, uint32_t hop)
__func__,
link->link_id.enum_id - ENUM_ID_1,
link->lttpr_mode,
- link->hpd_status);
+ link->is_hpd_pending);
/* Abandon clean-up if sink unplugged. */
- if (!link->hpd_status)
+ if (link->is_hpd_pending)
return;
if (hop != DPRX)
diff --git a/drivers/gpu/drm/amd/display/dc/dc_link.h b/drivers/gpu/drm/amd/display/dc/dc_link.h
index b732398dac89..d449e72a4e2a 100644
--- a/drivers/gpu/drm/amd/display/dc/dc_link.h
+++ b/drivers/gpu/drm/amd/display/dc/dc_link.h
@@ -113,6 +113,7 @@ struct dc_link {
* DIG encoder. */
bool is_dig_mapping_flexible;
bool hpd_status; /* HPD status of link without physical HPD pin. */
+ bool is_hpd_pending; /* Indicates a new received hpd */
bool edp_sink_present;
--
2.25.1
next prev parent reply other threads:[~2021-11-04 20:53 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-11-04 20:51 [PATCH 00/22] DC Patches Nov 4, 2021 Anson Jacob
2021-11-04 20:51 ` [PATCH 01/22] drm/amd/display: Add helper for blanking all dp displays Anson Jacob
2021-11-04 20:51 ` [PATCH 02/22] drm/amd/display: Pass panel inst to a PSR command Anson Jacob
2021-11-04 20:51 ` [PATCH 03/22] drm/amd/display: remove dmcub_support cap dependency Anson Jacob
2021-11-04 20:51 ` [PATCH 04/22] drm/amd/display: Add comment where CONFIG_DRM_AMD_DC_DCN macro ends Anson Jacob
2021-11-04 20:51 ` [PATCH 05/22] drm/amd/display: Fix RGB MPO underflow with multiple displays Anson Jacob
2021-11-04 20:51 ` [PATCH 06/22] drm/amd/display: Use link_enc_cfg API for queries Anson Jacob
2021-11-04 20:52 ` [PATCH 07/22] drm/amd/display: Fix detection of aligned DMUB firmware meta info Anson Jacob
2021-11-04 20:52 ` [PATCH 08/22] drm/amd/display: bring dcn31 clk mgr in line with other version style Anson Jacob
2021-11-04 20:52 ` [PATCH 09/22] drm/amd/display: clean up some formats and log Anson Jacob
2021-11-04 20:52 ` [PATCH 10/22] drm/amd/display: use link_rate_set above DPCD 1.3 (#1527) Anson Jacob
2021-11-04 20:52 ` [PATCH 11/22] drm/amd/display: fix stale info in link encoder assignment Anson Jacob
2021-11-04 20:52 ` [PATCH 12/22] drm/amd/display: retain/release stream pointer in link enc table Anson Jacob
2021-11-04 20:52 ` [PATCH 13/22] drm/amd/display: Don't lock connection_mutex for DMUB HPD Anson Jacob
2021-11-04 20:52 ` [PATCH 14/22] drm/amd/display: Add callbacks for DMUB HPD IRQ notifications Anson Jacob
2021-11-04 20:52 ` [PATCH 15/22] drm/amd/display: Fix Coverity Issues Anson Jacob
2021-11-04 20:52 ` Anson Jacob [this message]
2021-11-04 20:52 ` [PATCH 17/22] drm/amd/display: Adjust code indentation Anson Jacob
2021-11-04 20:52 ` [PATCH 18/22] drm/amd/display: 3.2.161 Anson Jacob
2021-11-04 20:52 ` [PATCH 19/22] drm/amd/display: To support sending TPS3 pattern when restoring link Anson Jacob
2021-11-04 20:52 ` [PATCH 20/22] drm/amd/display: Query all entries in assignment table during updates Anson Jacob
2021-11-04 20:52 ` [PATCH 21/22] drm/amd/display: Initialise encoder assignment when initialising dc_state Anson Jacob
2021-11-04 20:52 ` [PATCH 22/22] drm/amd/display: Wait for ACK for INBOX0 HW Lock Anson Jacob
2021-11-05 20:14 ` [PATCH 00/22] DC Patches Nov 4, 2021 Wheeler, Daniel
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