<feed xmlns='http://www.w3.org/2005/Atom'>
<title>linux-toradex.git/drivers/gpu/drm/amd/display/dc/mpc/dcn401, branch master</title>
<subtitle>Linux kernel for Apalis and Colibri modules</subtitle>
<link rel='alternate' type='text/html' href='https://git.toradex.cn/cgit/linux-toradex.git/'/>
<entry>
<title>drm/amd/display: Migrate color manager HW and fix MCM blend LUT issues</title>
<updated>2026-08-06T16:44:26+00:00</updated>
<author>
<name>Rafal Ostrowski</name>
<email>rafal.ostrowski@amd.com</email>
</author>
<published>2026-07-28T14:39:37+00:00</published>
<link rel='alternate' type='text/html' href='https://git.toradex.cn/cgit/linux-toradex.git/commit/?id=41951483258971e4f312275cddcdd2dad9fd48f5'/>
<id>41951483258971e4f312275cddcdd2dad9fd48f5</id>
<content type='text'>
Combine two related color manager improvements:

1. Migrate MCM/RMCM, shaper and 3DLUT HW programming to dc_plane_cm
   - Continue convergence with upstream Color Manager refactor
   - Migrate MCM/RMCM, shaper and 3DLUT programming for dcn401+ to dc_plane_cm
   - Unify MCM programming across both legacy and 3DLUT DMA paths
   - Add 3DLUT DMA broadcast support for multi-pipe planes

2. Reprogram MCM blend LUT on blend_enable falling edge
   - Fix issue where SDR desktop remained desaturated after video playback
   - Detect blend_enable falling edge (1-&gt;0) in surface update detection
   - Force MCM LUT reprogramming on blend state change

Reviewed-by: Dillon Varone &lt;dillon.varone@amd.com&gt;
Signed-off-by: Rafal Ostrowski &lt;rafal.ostrowski@amd.com&gt;
Signed-off-by: Roman Li &lt;roman.li@amd.com&gt;
Tested-by: Dan Wheeler &lt;daniel.wheeler@amd.com&gt;
Signed-off-by: Alex Deucher &lt;alexander.deucher@amd.com&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
Combine two related color manager improvements:

1. Migrate MCM/RMCM, shaper and 3DLUT HW programming to dc_plane_cm
   - Continue convergence with upstream Color Manager refactor
   - Migrate MCM/RMCM, shaper and 3DLUT programming for dcn401+ to dc_plane_cm
   - Unify MCM programming across both legacy and 3DLUT DMA paths
   - Add 3DLUT DMA broadcast support for multi-pipe planes

2. Reprogram MCM blend LUT on blend_enable falling edge
   - Fix issue where SDR desktop remained desaturated after video playback
   - Detect blend_enable falling edge (1-&gt;0) in surface update detection
   - Force MCM LUT reprogramming on blend state change

Reviewed-by: Dillon Varone &lt;dillon.varone@amd.com&gt;
Signed-off-by: Rafal Ostrowski &lt;rafal.ostrowski@amd.com&gt;
Signed-off-by: Roman Li &lt;roman.li@amd.com&gt;
Tested-by: Dan Wheeler &lt;daniel.wheeler@amd.com&gt;
Signed-off-by: Alex Deucher &lt;alexander.deucher@amd.com&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>drm/amd/display: adjust floating point format for gamut remap when needed</title>
<updated>2026-07-28T23:17:31+00:00</updated>
<author>
<name>Clay King</name>
<email>clayking@amd.com</email>
</author>
<published>2026-07-15T21:41:55+00:00</published>
<link rel='alternate' type='text/html' href='https://git.toradex.cn/cgit/linux-toradex.git/commit/?id=1c5e6cd8291f3e3c9f27b592a11bdb8408b2c64f'/>
<id>1c5e6cd8291f3e3c9f27b592a11bdb8408b2c64f</id>
<content type='text'>
[Why]
The MPCCs different gamut remap matrices allow for S2D13 and S3D12 floating
point formats, but only S2D13 is used. There may be cases where more
integer bits are required.

[How]
Switch to S3D12 if any entries in the remap matrix cannot fit in S2D13.
Otherwise, prefer the extra precision of S2D13. Communicate the max value
that hw can support to dm via dc color caps.

Reviewed-by: Dillon Varone &lt;dillon.varone@amd.com&gt;
Signed-off-by: Clay King &lt;clayking@amd.com&gt;
Signed-off-by: Fangzhi Zuo &lt;jerry.zuo@amd.com&gt;
Tested-by: Dan Wheeler &lt;daniel.wheeler@amd.com&gt;
Signed-off-by: Alex Deucher &lt;alexander.deucher@amd.com&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
[Why]
The MPCCs different gamut remap matrices allow for S2D13 and S3D12 floating
point formats, but only S2D13 is used. There may be cases where more
integer bits are required.

[How]
Switch to S3D12 if any entries in the remap matrix cannot fit in S2D13.
Otherwise, prefer the extra precision of S2D13. Communicate the max value
that hw can support to dm via dc color caps.

Reviewed-by: Dillon Varone &lt;dillon.varone@amd.com&gt;
Signed-off-by: Clay King &lt;clayking@amd.com&gt;
Signed-off-by: Fangzhi Zuo &lt;jerry.zuo@amd.com&gt;
Tested-by: Dan Wheeler &lt;daniel.wheeler@amd.com&gt;
Signed-off-by: Alex Deucher &lt;alexander.deucher@amd.com&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>drm/amd/display: Fix Color Manager (3DLUT, Shaper, Blend)</title>
<updated>2026-05-05T13:56:52+00:00</updated>
<author>
<name>Dillon Varone</name>
<email>Dillon.Varone@amd.com</email>
</author>
<published>2026-03-19T15:57:08+00:00</published>
<link rel='alternate' type='text/html' href='https://git.toradex.cn/cgit/linux-toradex.git/commit/?id=12f58a6caad3be54d7788b338b3f57d7c17bbef7'/>
<id>12f58a6caad3be54d7788b338b3f57d7c17bbef7</id>
<content type='text'>
[WHY &amp; HOW]
The original refactor and fixes are causing regressions.
Revert them for now until they can be resolved

Fixes: e56e3cff2a1b ("drm/amd/display: Sync dcn42 with DC 3.2.373")
Reviewed-by: Tom Chung &lt;chiahsuan.chung@amd.com&gt;
Signed-off-by: Dillon Varone &lt;Dillon.Varone@amd.com&gt;
Signed-off-by: James Lin &lt;pinglei.lin@amd.com&gt;
Signed-off-by: Alex Deucher &lt;alexander.deucher@amd.com&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
[WHY &amp; HOW]
The original refactor and fixes are causing regressions.
Revert them for now until they can be resolved

Fixes: e56e3cff2a1b ("drm/amd/display: Sync dcn42 with DC 3.2.373")
Reviewed-by: Tom Chung &lt;chiahsuan.chung@amd.com&gt;
Signed-off-by: Dillon Varone &lt;Dillon.Varone@amd.com&gt;
Signed-off-by: James Lin &lt;pinglei.lin@amd.com&gt;
Signed-off-by: Alex Deucher &lt;alexander.deucher@amd.com&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>drm/amd/display: Sync dcn42 with DC 3.2.373</title>
<updated>2026-03-11T17:58:07+00:00</updated>
<author>
<name>Roman Li</name>
<email>Roman.Li@amd.com</email>
</author>
<published>2026-03-05T17:56:09+00:00</published>
<link rel='alternate' type='text/html' href='https://git.toradex.cn/cgit/linux-toradex.git/commit/?id=e56e3cff2a1bb29545ddbec562e76c0419363a40'/>
<id>e56e3cff2a1bb29545ddbec562e76c0419363a40</id>
<content type='text'>
This patch provides a bulk merge to align driver
support for DCN42 with Display Core version 3.2.373.

It includes upgrade for:
- clk_mgr
- dml2/dml21
- optc
- hubp
- mpc
- optc
- hwseq

Acked-by: Aurabindo Pillai &lt;aurabindo.pillai@amd.com&gt;
Signed-off-by: Roman Li &lt;Roman.Li@amd.com&gt;
Signed-off-by: Alex Hung &lt;alex.hung@amd.com&gt;
Tested-by: Dan Wheeler &lt;daniel.wheeler@amd.com&gt;
Signed-off-by: Alex Deucher &lt;alexander.deucher@amd.com&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
This patch provides a bulk merge to align driver
support for DCN42 with Display Core version 3.2.373.

It includes upgrade for:
- clk_mgr
- dml2/dml21
- optc
- hubp
- mpc
- optc
- hwseq

Acked-by: Aurabindo Pillai &lt;aurabindo.pillai@amd.com&gt;
Signed-off-by: Roman Li &lt;Roman.Li@amd.com&gt;
Signed-off-by: Alex Hung &lt;alex.hung@amd.com&gt;
Tested-by: Dan Wheeler &lt;daniel.wheeler@amd.com&gt;
Signed-off-by: Alex Deucher &lt;alexander.deucher@amd.com&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>drm/amd/display: Enable dcn42 DC</title>
<updated>2026-02-23T19:28:33+00:00</updated>
<author>
<name>Roman Li</name>
<email>Roman.Li@amd.com</email>
</author>
<published>2026-02-02T23:47:34+00:00</published>
<link rel='alternate' type='text/html' href='https://git.toradex.cn/cgit/linux-toradex.git/commit/?id=6b2dd7d37badd8bf076875397f9f39b494258ca7'/>
<id>6b2dd7d37badd8bf076875397f9f39b494258ca7</id>
<content type='text'>
Add support for DCN 4.2 in Display Core

Signed-off-by: Roman Li &lt;Roman.Li@amd.com&gt;
Acked-by: Harry Wentland &lt;harry.wentland@amd.com&gt;
Signed-off-by: Alex Deucher &lt;alexander.deucher@amd.com&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
Add support for DCN 4.2 in Display Core

Signed-off-by: Roman Li &lt;Roman.Li@amd.com&gt;
Acked-by: Harry Wentland &lt;harry.wentland@amd.com&gt;
Signed-off-by: Alex Deucher &lt;alexander.deucher@amd.com&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>drm/amd/display: Add more DC HW state info to underflow logging</title>
<updated>2025-10-28T13:57:44+00:00</updated>
<author>
<name>Karen Chen</name>
<email>Karen.Chen@amd.com</email>
</author>
<published>2025-10-15T15:13:07+00:00</published>
<link rel='alternate' type='text/html' href='https://git.toradex.cn/cgit/linux-toradex.git/commit/?id=dbf58a9dad4d80286c5c17e199f595eb0dd3be5a'/>
<id>dbf58a9dad4d80286c5c17e199f595eb0dd3be5a</id>
<content type='text'>
[Why]
Debugging underflow issues frequently requires knowing the
HW state at the time of underflow. To enable capturing this
HW state information, interface functions are needed for the
various DC HW blocks.

[How]
This change adds the interface functions to read HW state for
the following DC HW blocks:
- HUBBUB
- HUBP
- DPP
- MPC
- OPP
- DSC
- OPTC
- DCCG

Reviewed-by: George Shen &lt;george.shen@amd.com&gt;
Signed-off-by: Karen Chen &lt;Karen.Chen@amd.com&gt;
Signed-off-by: Wayne Lin &lt;wayne.lin@amd.com&gt;
Tested-by: Dan Wheeler &lt;daniel.wheeler@amd.com&gt;
Signed-off-by: Alex Deucher &lt;alexander.deucher@amd.com&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
[Why]
Debugging underflow issues frequently requires knowing the
HW state at the time of underflow. To enable capturing this
HW state information, interface functions are needed for the
various DC HW blocks.

[How]
This change adds the interface functions to read HW state for
the following DC HW blocks:
- HUBBUB
- HUBP
- DPP
- MPC
- OPP
- DSC
- OPTC
- DCCG

Reviewed-by: George Shen &lt;george.shen@amd.com&gt;
Signed-off-by: Karen Chen &lt;Karen.Chen@amd.com&gt;
Signed-off-by: Wayne Lin &lt;wayne.lin@amd.com&gt;
Tested-by: Dan Wheeler &lt;daniel.wheeler@amd.com&gt;
Signed-off-by: Alex Deucher &lt;alexander.deucher@amd.com&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>drm/amd/display: Delete unused functions</title>
<updated>2025-08-18T20:57:22+00:00</updated>
<author>
<name>Clay King</name>
<email>clayking@amd.com</email>
</author>
<published>2025-07-30T14:23:19+00:00</published>
<link rel='alternate' type='text/html' href='https://git.toradex.cn/cgit/linux-toradex.git/commit/?id=de0f5be79182c6ac53133d750cc965fe9621f57b'/>
<id>de0f5be79182c6ac53133d750cc965fe9621f57b</id>
<content type='text'>
[WHAT]
Removing unused code

Reviewed-by: Joshua Aberback &lt;joshua.aberback@amd.com&gt;
Signed-off-by: Clay King &lt;clayking@amd.com&gt;
Signed-off-by: Alex Hung &lt;alex.hung@amd.com&gt;
Tested-by: Dan Wheeler &lt;daniel.wheeler@amd.com&gt;
Signed-off-by: Alex Deucher &lt;alexander.deucher@amd.com&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
[WHAT]
Removing unused code

Reviewed-by: Joshua Aberback &lt;joshua.aberback@amd.com&gt;
Signed-off-by: Clay King &lt;clayking@amd.com&gt;
Signed-off-by: Alex Hung &lt;alex.hung@amd.com&gt;
Tested-by: Dan Wheeler &lt;daniel.wheeler@amd.com&gt;
Signed-off-by: Alex Deucher &lt;alexander.deucher@amd.com&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>drm/amd/display: Initialize mode_select to 0</title>
<updated>2025-06-24T13:55:43+00:00</updated>
<author>
<name>Alex Hung</name>
<email>alex.hung@amd.com</email>
</author>
<published>2025-06-10T21:40:18+00:00</published>
<link rel='alternate' type='text/html' href='https://git.toradex.cn/cgit/linux-toradex.git/commit/?id=592ddac93f8c02e13f19175745465f8c4d0f56cd'/>
<id>592ddac93f8c02e13f19175745465f8c4d0f56cd</id>
<content type='text'>
[WHAT]
mode_select was supposed to be initialized in mpc_read_gamut_remap but
is not set in default case. This can cause indeterminate
behaviors.

This is reported as an UNINIT error by Coverity.

Reviewed-by: Aurabindo Pillai &lt;aurabindo.pillai@amd.com&gt;
Signed-off-by: Alex Hung &lt;alex.hung@amd.com&gt;
Signed-off-by: Fangzhi Zuo &lt;jerry.zuo@amd.com&gt;
Tested-by: Daniel Wheeler &lt;daniel.wheeler@amd.com&gt;
Signed-off-by: Alex Deucher &lt;alexander.deucher@amd.com&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
[WHAT]
mode_select was supposed to be initialized in mpc_read_gamut_remap but
is not set in default case. This can cause indeterminate
behaviors.

This is reported as an UNINIT error by Coverity.

Reviewed-by: Aurabindo Pillai &lt;aurabindo.pillai@amd.com&gt;
Signed-off-by: Alex Hung &lt;alex.hung@amd.com&gt;
Signed-off-by: Fangzhi Zuo &lt;jerry.zuo@amd.com&gt;
Tested-by: Daniel Wheeler &lt;daniel.wheeler@amd.com&gt;
Signed-off-by: Alex Deucher &lt;alexander.deucher@amd.com&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>drm/amd/display: Add HW change required mpc gamut remap</title>
<updated>2025-06-18T16:19:16+00:00</updated>
<author>
<name>Charlene Liu</name>
<email>charlene.liu@amd.com</email>
</author>
<published>2025-05-20T16:03:44+00:00</published>
<link rel='alternate' type='text/html' href='https://git.toradex.cn/cgit/linux-toradex.git/commit/?id=c6618fa8b926fadf356612f5242057c2d761b1ab'/>
<id>c6618fa8b926fadf356612f5242057c2d761b1ab</id>
<content type='text'>
[WHAT]
Add HW change to required mpc gamut remap

Reviewed-by: Dmytro Laktyushkin &lt;dmytro.laktyushkin@amd.com&gt;
Signed-off-by: Charlene Liu &lt;charlene.liu@amd.com&gt;
Signed-off-by: Alex Hung &lt;alex.hung@amd.com&gt;
Tested-by: Daniel Wheeler &lt;daniel.wheeler@amd.com&gt;
Signed-off-by: Alex Deucher &lt;alexander.deucher@amd.com&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
[WHAT]
Add HW change to required mpc gamut remap

Reviewed-by: Dmytro Laktyushkin &lt;dmytro.laktyushkin@amd.com&gt;
Signed-off-by: Charlene Liu &lt;charlene.liu@amd.com&gt;
Signed-off-by: Alex Hung &lt;alex.hung@amd.com&gt;
Tested-by: Daniel Wheeler &lt;daniel.wheeler@amd.com&gt;
Signed-off-by: Alex Deucher &lt;alexander.deucher@amd.com&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>drm/amd/display: removed unused function</title>
<updated>2025-04-07T19:18:59+00:00</updated>
<author>
<name>James Flowers</name>
<email>bold.zone2373@fastmail.com</email>
</author>
<published>2025-03-28T03:29:02+00:00</published>
<link rel='alternate' type='text/html' href='https://git.toradex.cn/cgit/linux-toradex.git/commit/?id=ca690c7e211d2c044056ac2b878a22f8c6601820'/>
<id>ca690c7e211d2c044056ac2b878a22f8c6601820</id>
<content type='text'>
Removed unused function mpc401_get_3dlut_fast_load_status.

Signed-off-by: James Flowers &lt;bold.zone2373@fastmail.com&gt;
Signed-off-by: Alex Deucher &lt;alexander.deucher@amd.com&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
Removed unused function mpc401_get_3dlut_fast_load_status.

Signed-off-by: James Flowers &lt;bold.zone2373@fastmail.com&gt;
Signed-off-by: Alex Deucher &lt;alexander.deucher@amd.com&gt;
</pre>
</div>
</content>
</entry>
</feed>
