From: Paul Menzel <pmenzel@molgen.mpg.de>
To: Ryan Lin <tsung-hua.lin@amd.com>
Cc: "Stéphane Marchesin" <marcheu@chromium.org>,
"Leo Li" <sunpeng.li@amd.com>,
leon.li@amd.com, "Rodrigo Siqueira" <Rodrigo.Siqueira@amd.com>,
linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org,
"Nicholas Kazlauskas" <nicholas.kazlauskas@amd.com>,
"David Airlie" <airlied@linux.ie>,
"Sean Paul" <seanpaul@chromium.org>,
amd-gfx@lists.freedesktop.org, "Daniel Vetter" <daniel@ffwll.ch>,
"Bas Nieuwenhuizen" <bas@basnieuwenhuizen.nl>,
"Drew Davenport" <ddavenport@chromium.org>,
"Alex Deucher" <alexander.deucher@amd.com>,
"Mark Yacoub" <markyacoub@google.com>,
"Harry Wentland" <harry.wentland@amd.com>,
"Christian König" <christian.koenig@amd.com>,
"Louis Li" <ching-shih.li@amd.corp-partner.google.com>
Subject: Re: [PATCH v2] drm/amdgpu: fix that issue that the number of the crtc of the 3250c is not correct
Date: Wed, 30 Mar 2022 08:36:22 +0200 [thread overview]
Message-ID: <7c7ec347-4372-31ac-94ed-5d20602c6ce2@molgen.mpg.de> (raw)
In-Reply-To: <de559e34-3b56-a3d5-cd7a-89bc8f5528d7@molgen.mpg.de>
[Cc: Remove undeliverable Chun Ming Zhou <mailto:David1.Zhou@amd.com>]
Am 30.03.22 um 08:34 schrieb Paul Menzel:
> Dear Tsung-Hua,
>
>
> Thank you for your patch.
>
> Am 30.03.22 um 04:46 schrieb Ryan Lin:
>
> The commit message summary is quite long and confusing. Maybe:
>
> Use 3 CRTC for 3250c to get internal display working
>
>> [Why]
>> External displays take priority over internal display when there are
>> fewer
>> display controllers than displays.
>
> This causes the internal display to not work on the Chromebook google/zork.
>
>> [How]
>> The root cause is because of that number of the crtc is not correct.
>
> The root cause is the incorrect number of four configured CRTCs.
>
>> The number of the crtc on the 3250c is 3, but on the 3500c is 4.
>> On the source code, we can see that number of the crtc has been fixed
>> at 4.
>> Needs to set the num_crtc to 3 for 3250c platform.
>
> Please do not wrap lines after each sentence, and use a text width of 75
> characters.
>
>> v2:
>> - remove unnecessary comments and Id
>>
>> Signed-off-by: Ryan Lin <tsung-hua.lin@amd.com>
>>
>> ---
>> drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 12 +++++++++---
>> 1 file changed, 9 insertions(+), 3 deletions(-)
>>
>> diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
>> b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
>> index 40c91b448f7da..455a2c45e8cda 100644
>> --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
>> +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
>> @@ -2738,9 +2738,15 @@ static int dm_early_init(void *handle)
>> break;
>> #if defined(CONFIG_DRM_AMD_DC_DCN1_0)
>> case CHIP_RAVEN:
>> - adev->mode_info.num_crtc = 4;
>> - adev->mode_info.num_hpd = 4;
>> - adev->mode_info.num_dig = 4;
>> + if (adev->rev_id >= 8) {
>
> Is there some define for that number? Maybe add a comment, that it’s for
> 3250c?
>
>
> Kind regards,
>
> Paul
>
>
>> + adev->mode_info.num_crtc = 3;
>> + adev->mode_info.num_hpd = 3;
>> + adev->mode_info.num_dig = 3;
>> + } else {
>> + adev->mode_info.num_crtc = 4;
>> + adev->mode_info.num_hpd = 4;
>> + adev->mode_info.num_dig = 4;
>> + }
>> break;
>> #endif
>> #if defined(CONFIG_DRM_AMD_DC_DCN2_0)
prev parent reply other threads:[~2022-03-30 6:36 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-01-27 8:12 [PATCH] drm/amdgpu: fix that issue that the number of the crtc of the 3250c is not correct RyanLin
2022-01-27 14:14 ` Alex Deucher
2022-01-27 15:33 ` Mark Yacoub
2022-03-30 2:46 ` [PATCH v2] " Ryan Lin
2022-03-30 3:01 ` Alex Deucher
2022-03-30 4:29 ` VURDIGERENATARAJ, CHANDAN
2022-03-30 5:50 ` Lin, Tsung-hua (Ryan)
2022-03-30 8:15 ` VURDIGERENATARAJ, CHANDAN
2022-03-30 6:34 ` Paul Menzel
2022-03-30 6:36 ` Paul Menzel [this message]
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