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b=GqmuGOC7THTnPGEeeTVHGgmeq0AoR3s3BnC6K46+1VskPjnPnoHNLcxGGdz0m2Wu/DiAJJVciarjjXlFwkS/Pyz8iWq92nqKcTAC7DKGoymfT5D2uNit53iC88txd7ZLlcpn5qJwmB+mCKjAZa5f3m2PsByhTDJBQTHvkenhpXg= Authentication-Results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=amd.com; Received: from SJ0PR12MB5438.namprd12.prod.outlook.com (2603:10b6:a03:3ba::23) by IA0PR12MB8207.namprd12.prod.outlook.com (2603:10b6:208:401::8) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.8048.25; Wed, 16 Oct 2024 17:47:04 +0000 Received: from SJ0PR12MB5438.namprd12.prod.outlook.com ([fe80::65b2:12d5:96ba:dd44]) by SJ0PR12MB5438.namprd12.prod.outlook.com ([fe80::65b2:12d5:96ba:dd44%7]) with mapi id 15.20.8048.029; Wed, 16 Oct 2024 17:47:04 +0000 Message-ID: <5b1c8688-8154-436e-ba8f-f5a9087d2c85@amd.com> Date: Wed, 16 Oct 2024 13:46:58 -0400 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v6 0/4] drm: Minimum backlight overrides and implementation for amdgpu To: =?UTF-8?Q?Thomas_Wei=C3=9Fschuh?= , Leo Li Cc: Alex Deucher , =?UTF-8?Q?Christian_K=C3=B6nig?= , David Airlie , Daniel Vetter , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , Rodrigo Siqueira , Mario Limonciello , Matt Hartley , Kieran Levin , Hans de Goede , Jani Nikula , Xinhui Pan , Jonathan Corbet , amd-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, Dustin Howett , linux-doc@vger.kernel.org References: <20240824-amdgpu-min-backlight-quirk-v6-0-1ed776a17fb3@weissschuh.net> Content-Language: en-US From: Harry Wentland In-Reply-To: Content-Type: text/plain; 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This leads to a fairly bright minimum display backlight. >> >> Introduce a quirk to override "min_input_signal" to "0" which leads to a >> much lower minimum brightness, which is still readable even in daylight. > > could you take another look at the series? > The issues around panel power are not specific to the low pwm values, > so shouldn't have an impact on this series. > (And are nearly imperceptible anyways) > I think these patches are good. Reviewed-by: Harry Wentland Harry >> One solution would be a fixed firmware version, which was announced but >> has no timeline. >> >> --- >> Changes in v6: >> - Clean up cover letter and commit messages >> - Add my S-o-b to patch from Dustin >> - Mention testing in combination with "panel_power_savings" >> - Link to v5: https://lore.kernel.org/r/20240818-amdgpu-min-backlight-quirk-v5-0-b6c0ead0c73d@weissschuh.net >> >> Changes in v5: >> - Forward-declare struct drm_edid >> - Reorder patches, quirk entries are last >> - Add patch from Dustin for additional quirk entries >> - Link to v4: https://lore.kernel.org/r/20240812-amdgpu-min-backlight-quirk-v4-0-56a63ff897b7@weissschuh.net >> >> Changes in v4: >> - Switch back to v2 implementation >> - Add MODULE_DESCRIPTION() >> - Simplify quirk infrastructure to only handle min backlight quirks. >> It can be extended if necessary. >> - Expand documentation. >> - Link to v3: https://lore.kernel.org/r/20240731-amdgpu-min-backlight-quirk-v3-0-46d40bb21a62@weissschuh.net >> >> Changes in v3: >> - Switch to cmdline override parameter >> - Link to v2: https://lore.kernel.org/r/20240623-amdgpu-min-backlight-quirk-v2-0-cecf7f49da9b@weissschuh.net >> >> Changes in v2: >> - Introduce proper drm backlight quirk infrastructure >> - Quirk by EDID and DMI instead of only DMI >> - Limit quirk to only single Framework 13 matte panel >> - Link to v1: https://lore.kernel.org/r/20240610-amdgpu-min-backlight-quirk-v1-1-8459895a5b2a@weissschuh.net >> >> --- >> Dustin L. Howett (1): >> drm: panel-backlight-quirks: Add Framework 13 glossy and 2.8k panels >> >> Thomas Weißschuh (3): >> drm: Add panel backlight quirks >> drm/amd/display: Add support for minimum backlight quirk >> drm: panel-backlight-quirks: Add Framework 13 matte panel >> >> Documentation/gpu/drm-kms-helpers.rst | 3 + >> drivers/gpu/drm/Kconfig | 4 + >> drivers/gpu/drm/Makefile | 1 + >> drivers/gpu/drm/amd/amdgpu/Kconfig | 1 + >> drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 10 +++ >> drivers/gpu/drm/drm_panel_backlight_quirks.c | 94 +++++++++++++++++++++++ >> include/drm/drm_utils.h | 4 + >> 7 files changed, 117 insertions(+) >> --- >> base-commit: d2bafcf224f3911b183113b2fcb536c9e90684a3 >> change-id: 20240610-amdgpu-min-backlight-quirk-8402fd8e736a >> >> Best regards, >> -- >> Thomas Weißschuh >>