From: Manasi Navare <manasi.d.navare@intel.com>
To: intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org
Cc: Manasi Navare <manasi.d.navare@intel.com>,
Nicholas Kazlauskas <Nicholas.Kazlauskas@amd.com>
Subject: [PATCH v2 1/2] drm/dp: DRM DP helper for reading Ignore MSA from DPCD
Date: Tue, 24 Mar 2020 18:22:00 -0700 [thread overview]
Message-ID: <20200325012201.11376-1-manasi.d.navare@intel.com> (raw)
DP sink device sets the Ignore MSA bit in its
DP_DOWNSTREAM_PORT_COUNT register to indicate its ability to
ignore the MSA video timing paramaters and its ability to support
seamless video timing change over a range of timing exposed by
DisplayID and EDID.
This is required for the sink to indicate that it is Adaptive sync
capable.
v2:
* Rename to describe what the function does (Jani Nikula)
Cc: Jani Nikula <jani.nikula@linux.intel.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Harry Wentland <harry.wentland@amd.com>
Cc: Nicholas Kazlauskas <Nicholas.Kazlauskas@amd.com>
Signed-off-by: Manasi Navare <manasi.d.navare@intel.com>
Reviewed-by: Harry Wentland <harry.wentland@amd.com>
---
include/drm/drm_dp_helper.h | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/include/drm/drm_dp_helper.h b/include/drm/drm_dp_helper.h
index 9d87cdf2740a..36655f3c83f8 100644
--- a/include/drm/drm_dp_helper.h
+++ b/include/drm/drm_dp_helper.h
@@ -1315,6 +1315,14 @@ drm_dp_alternate_scrambler_reset_cap(const u8 dpcd[DP_RECEIVER_CAP_SIZE])
DP_ALTERNATE_SCRAMBLER_RESET_CAP;
}
+/* Ignore MSA timing for Adaptive Sync support on DP 1.4 */
+static inline bool
+drm_dp_sink_can_do_video_without_timing_msa(const u8 dpcd[DP_RECEIVER_CAP_SIZE])
+{
+ return dpcd[DP_DOWN_STREAM_PORT_COUNT] &
+ DP_MSA_TIMING_PAR_IGNORED;
+}
+
/*
* DisplayPort AUX channel
*/
--
2.19.1
_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel
next reply other threads:[~2020-03-25 1:20 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-03-25 1:22 Manasi Navare [this message]
2020-03-25 1:22 ` [PATCH v2 2/2] drm/i915/dp: Attach and set drm connector VRR property Manasi Navare
2020-03-31 0:26 ` Manasi Navare
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20200325012201.11376-1-manasi.d.navare@intel.com \
--to=manasi.d.navare@intel.com \
--cc=Nicholas.Kazlauskas@amd.com \
--cc=dri-devel@lists.freedesktop.org \
--cc=intel-gfx@lists.freedesktop.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox