From: Thierry Reding <thierry.reding@gmail.com>
To: dri-devel@lists.freedesktop.org
Subject: [PATCH v2 08/21] drm/dp: Read TPS3 capability from sink
Date: Mon, 2 Sep 2019 13:31:08 +0200 [thread overview]
Message-ID: <20190902113121.31323-9-thierry.reding@gmail.com> (raw)
In-Reply-To: <20190902113121.31323-1-thierry.reding@gmail.com>
From: Thierry Reding <treding@nvidia.com>
The TPS3 capability can be exposed by DP 1.2 and later sinks if they
support the alternative training pattern for channel equalization.
Signed-off-by: Thierry Reding <treding@nvidia.com>
---
drivers/gpu/drm/drm_dp_helper.c | 3 +++
include/drm/drm_dp_helper.h | 2 ++
2 files changed, 5 insertions(+)
diff --git a/drivers/gpu/drm/drm_dp_helper.c b/drivers/gpu/drm/drm_dp_helper.c
index 74e4fceace7e..c47d78973c1e 100644
--- a/drivers/gpu/drm/drm_dp_helper.c
+++ b/drivers/gpu/drm/drm_dp_helper.c
@@ -355,6 +355,7 @@ EXPORT_SYMBOL(drm_dp_dpcd_read_link_status);
static void drm_dp_link_caps_reset(struct drm_dp_link_caps *caps)
{
caps->enhanced_framing = false;
+ caps->tps3_supported = false;
caps->fast_training = false;
}
@@ -362,6 +363,7 @@ void drm_dp_link_caps_copy(struct drm_dp_link_caps *dest,
const struct drm_dp_link_caps *src)
{
dest->enhanced_framing = src->enhanced_framing;
+ dest->tps3_supported = src->tps3_supported;
dest->fast_training = src->fast_training;
}
EXPORT_SYMBOL(drm_dp_link_caps_copy);
@@ -408,6 +410,7 @@ int drm_dp_link_probe(struct drm_dp_aux *aux, struct drm_dp_link *link)
link->max_lanes = drm_dp_max_lane_count(values);
link->caps.enhanced_framing = drm_dp_enhanced_frame_cap(values);
+ link->caps.tps3_supported = drm_dp_tps3_supported(values);
link->caps.fast_training = drm_dp_fast_training_cap(values);
link->rate = link->max_rate;
diff --git a/include/drm/drm_dp_helper.h b/include/drm/drm_dp_helper.h
index c148f5685195..ab98ebb302a9 100644
--- a/include/drm/drm_dp_helper.h
+++ b/include/drm/drm_dp_helper.h
@@ -1369,10 +1369,12 @@ int drm_dp_dpcd_read_link_status(struct drm_dp_aux *aux,
/**
* struct drm_dp_link_caps - DP link capabilities
* @enhanced_framing: enhanced framing capability (mandatory as of DP 1.2)
+ * @tps3_supported: training pattern sequence 3 supported for equalization
* @fast_training: AUX CH handshake not required for link training
*/
struct drm_dp_link_caps {
bool enhanced_framing;
+ bool tps3_supported;
bool fast_training;
};
--
2.22.0
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next prev parent reply other threads:[~2019-09-02 11:31 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-09-02 11:31 [PATCH v2 00/21] drm/dp: Various helper improvements and cleanups Thierry Reding
2019-09-02 11:31 ` [PATCH v2 01/21] drm/dp: Sort includes alphabetically Thierry Reding
2019-09-02 11:31 ` [PATCH v2 02/21] drm/dp: Add missing kerneldoc for struct drm_dp_link Thierry Reding
2019-09-02 11:31 ` [PATCH v2 03/21] drm/dp: Add drm_dp_link_reset() implementation Thierry Reding
2019-09-02 11:31 ` [PATCH v2 04/21] drm/dp: Track link capabilities alongside settings Thierry Reding
2019-09-02 11:31 ` [PATCH v2 05/21] drm/dp: Turn link capabilities into booleans Thierry Reding
2019-09-02 11:31 ` [PATCH v2 06/21] drm/dp: Probe link using existing parsing helpers Thierry Reding
2019-09-02 11:31 ` [PATCH v2 07/21] drm/dp: Read fast training capability from link Thierry Reding
2019-09-02 11:31 ` Thierry Reding [this message]
2019-09-02 11:31 ` [PATCH v2 09/21] drm/dp: Read channel coding capability from sink Thierry Reding
2019-09-02 11:31 ` [PATCH v2 10/21] drm/dp: Read alternate scrambler reset " Thierry Reding
2019-09-02 11:31 ` [PATCH v2 11/21] drm/dp: Read eDP version from DPCD Thierry Reding
2019-09-02 11:31 ` [PATCH v2 12/21] drm/dp: Read AUX read interval " Thierry Reding
2019-09-02 11:31 ` [PATCH v2 13/21] drm/dp: Do not busy-loop during link training Thierry Reding
2019-09-02 11:31 ` [PATCH v2 14/21] drm/dp: Use drm_dp_aux_rd_interval() Thierry Reding
2019-09-02 11:31 ` [PATCH v2 15/21] drm/dp: Add helper to get post-cursor adjustments Thierry Reding
2019-09-02 11:31 ` [PATCH v2 16/21] drm/dp: Set channel coding on link configuration Thierry Reding
2019-09-02 11:31 ` [PATCH v2 17/21] drm/dp: Enable alternate scrambler reset when supported Thierry Reding
2019-09-02 11:31 ` [PATCH v2 18/21] drm/dp: Add drm_dp_link_choose() helper Thierry Reding
2019-09-02 11:31 ` [PATCH v2 19/21] drm/dp: Add support for eDP link rates Thierry Reding
2019-09-02 11:31 ` [PATCH v2 20/21] drm/dp: Remove a gratuituous blank line Thierry Reding
2019-09-02 11:31 ` [PATCH v2 21/21] drm/bridge: tc358767: Use DP nomenclature Thierry Reding
2019-09-20 16:00 ` [PATCH v2 00/21] drm/dp: Various helper improvements and cleanups Thierry Reding
2019-09-23 13:52 ` Jani Nikula
2019-09-23 14:52 ` Thierry Reding
2019-10-02 16:14 ` Thierry Reding
2019-10-08 9:42 ` Daniel Vetter
2019-10-08 23:05 ` Lyude Paul
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