linux-kernel - Re: [PATCH v3 00/10] drm: Make drivers to honour the nomodeset parameter

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Date:   Tue, 11 Jan 2022 09:52:24 +0100
From:   Thomas Zimmermann <tzimmermann@...e.de>
To:     Javier Martinez Canillas <javierm@...hat.com>,
        linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org
Cc:     Brian Starkey <brian.starkey@....com>,
        Chen Feng <puck.chen@...ilicon.com>,
        Daniel Vetter <daniel@...ll.ch>,
        Dave Airlie <airlied@...hat.com>,
        David Airlie <airlied@...ux.ie>,
        Fabio Estevam <festevam@...il.com>,
        Gerd Hoffmann <kraxel@...hat.com>,
        "James (Qian) Wang" <james.qian.wang@....com>,
        John Stultz <john.stultz@...aro.org>,
        Jonathan Corbet <corbet@....net>,
        Laurentiu Palcu <laurentiu.palcu@....nxp.com>,
        Liviu Dudau <liviu.dudau@....com>,
        Lucas Stach <l.stach@...gutronix.de>,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Maxime Ripard <mripard@...nel.org>,
        Mihail Atanassov <mihail.atanassov@....com>,
        NXP Linux Team <linux-imx@....com>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Shawn Guo <shawnguo@...nel.org>,
        Tian Tao <tiantao6@...ilicon.com>,
        Xinliang Liu <xinliang.liu@...aro.org>,
        Xinwei Kong <kong.kongxinwei@...ilicon.com>,
        linux-arm-kernel@...ts.infradead.org, linux-doc@...r.kernel.org,
        virtualization@...ts.linux-foundation.org
Subject: Re: [PATCH v3 00/10] drm: Make drivers to honour the nomodeset
 parameter

Hi

patches 6 to 10 are

Acked-by: Thomas Zimmermann <tzimmermann@...e.de>

Best regards
Thomas

Am 22.12.21 um 09:28 schrieb Javier Martinez Canillas:
> The nomodeset kernel command line parameter is used to prevent the KMS/DRM
> drivers to be registered/probed. But only a few drivers implement support
> for this and most DRM drivers just ignore it.
> 
> This patch series is a v3 to make DRM drivers to honour nomodeset. It is
> posted as separate patches to make easier for drivers maintainers to ack
> or pick them independently at their own pace.
> 
> The drm_module_{pci,platform}_driver() helper macros are added, which are
> just wrappers around module_{pci,platform}_driver() but adding a check for
> drm_firmware_drivers_only() and returning -ENODEV if that is true.
> 
> PCI and platform DRM drivers are then modified in the following patches to
> make use of those macros.
> 
> Only KMS drivers will be ported to use these new macros, and only for PCI
> and platform DRM drivers. A follow-up series might do the same for drivers
> that are rendering-only and for USB/SPI/I2C devices, but it will need more
> discussion to agree whether that's desirable or not.
> 
> Not all drivers were posted in v3 to avoid flooding the list with too many
> patches. I'm only including the patches adding the macros and some patches
> as an example of their usage.
> 
> I've built tested with 'make allmodconfig && make M=drivers/gpu/drm' but I
> don't have hardware to test the drivers, so review/testing is appreciated.
> 
> Best regards,
> Javier
> 
> Changes in v3:
> - Include Thomas Zimmermann's patches in the series and rebase on top.
> - Add collected Acked-by tags from v2.
> 
> Changes in v2:
> - Add drm_module_{pci,platform}_driver() macros and put the check there
>    (Thomas Zimmermann).
> - Use the drm_module_*_driver() macros if possible (Thomas Zimmermann).
> - Leave the DRM drivers that don't set the DRIVER_MODESET driver feature
>    (Lucas Stach).
> - Leave USB/SPI/I2C drivers and only include PCI and platform ones
>    (Noralf Trønnes).
> - Add collected Reviewed-by tags
> 
> Javier Martinez Canillas (5):
>    drm: Provide platform module-init macro
>    drm/imx/dcss: Replace module initialization with DRM helpers
>    drm/komeda: Replace module initialization with DRM helpers
>    drm/arm/hdlcd: Replace module initialization with DRM helpers
>    drm/malidp: Replace module initialization with DRM helpers
> 
> Thomas Zimmermann (5):
>    drm: Provide PCI module-init macros
>    drm/ast: Replace module-init boiler-plate code with DRM helpers
>    drm/bochs: Replace module-init boiler-plate code with DRM helpers
>    drm/cirrus: Replace module-init boiler-plate code with DRM helpers
>    drm/hisilicon/hibmc: Replace module initialization with DRM helpers
> 
>   Documentation/gpu/drm-internals.rst           |   6 +
>   .../gpu/drm/arm/display/komeda/komeda_drv.c   |   3 +-
>   drivers/gpu/drm/arm/hdlcd_drv.c               |   3 +-
>   drivers/gpu/drm/arm/malidp_drv.c              |   3 +-
>   drivers/gpu/drm/ast/ast_drv.c                 |  18 +--
>   .../gpu/drm/hisilicon/hibmc/hibmc_drm_drv.c   |   3 +-
>   drivers/gpu/drm/imx/dcss/dcss-drv.c           |   3 +-
>   drivers/gpu/drm/tiny/bochs.c                  |  20 +--
>   drivers/gpu/drm/tiny/cirrus.c                 |  17 +--
>   include/drm/drm_module.h                      | 125 ++++++++++++++++++
>   10 files changed, 147 insertions(+), 54 deletions(-)
>   create mode 100644 include/drm/drm_module.h
> 

-- 
Thomas Zimmermann
Graphics Driver Developer
SUSE Software Solutions Germany GmbH
Maxfeldstr. 5, 90409 Nürnberg, Germany
(HRB 36809, AG Nürnberg)
Geschäftsführer: Ivo Totev

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