From: Maxime Ripard <maxime@cerno.tech>
To: "Noralf Trønnes" <noralf@tronnes.org>
Cc: Emma Anholt <emma@anholt.net>,
Neil Armstrong <narmstrong@baylibre.com>,
David Airlie <airlied@linux.ie>,
dri-devel@lists.freedesktop.org,
Phil Elwell <phil@raspberrypi.com>,
Jerome Brunet <jbrunet@baylibre.com>,
Samuel Holland <samuel@sholland.org>,
Kevin Hilman <khilman@baylibre.com>,
Jernej Skrabec <jernej.skrabec@gmail.com>,
Chen-Yu Tsai <wens@csie.org>,
Geert Uytterhoeven <geert@linux-m68k.org>,
linux-sunxi@lists.linux.dev,
Martin Blumenstingl <martin.blumenstingl@googlemail.com>,
linux-amlogic@lists.infradead.org,
linux-arm-kernel@lists.infradead.org,
Dom Cobley <dom@raspberrypi.com>,
Dave Stevenson <dave.stevenson@raspberrypi.com>,
linux-kernel@vger.kernel.org,
Mateusz Kwiatkowski <kfyatek+publicgit@gmail.com>,
Thomas Zimmermann <tzimmermann@suse.de>
Subject: Re: [PATCH v1 05/35] drm/connector: Add TV standard property
Date: Tue, 16 Aug 2022 11:49:22 +0200 [thread overview]
Message-ID: <20220816094922.oqhrhefv327zo2ou@houat> (raw)
In-Reply-To: <ea6ebdda-f779-78af-1ffd-bd86d715077f@tronnes.org>
[-- Attachment #1: Type: text/plain, Size: 2703 bytes --]
On Tue, Aug 16, 2022 at 11:42:20AM +0200, Noralf Trønnes wrote:
>
>
> Den 16.08.2022 10.26, skrev Maxime Ripard:
> > Hi,
> >
> > On Mon, Aug 08, 2022 at 02:44:56PM +0200, Noralf Trønnes wrote:
> >> Den 29.07.2022 18.34, skrev Maxime Ripard:
> >>> The TV mode property has been around for a while now to select and get the
> >>> current TV mode output on an analog TV connector.
> >>>
> >>> Despite that property name being generic, its content isn't and has been
> >>> driver-specific which makes it hard to build any generic behaviour on top
> >>> of it, both in kernel and user-space.
> >>>
> >>> Let's create a new bitmask tv norm property, that can contain any of the
> >>> analog TV standards currently supported by kernel drivers. Each driver can
> >>> then pass in a bitmask of the modes it supports.
> >>>
> >>> We'll then be able to phase out the older tv mode property.
> >>>
> >>> Signed-off-by: Maxime Ripard <maxime@cerno.tech>
> >>>
> >>
> >> Please also update Documentation/gpu/kms-properties.csv
> >>
> >> Requirements for adding a new property is found in
> >> Documentation/gpu/drm-kms.rst
> >
> > I knew this was going to be raised at some point, so I'm glad it's that
> > early :)
> >
> > I really don't know what to do there. If we stick by our usual rules,
> > then we can't have any of that work merged.
> >
> > However, I think the status quo is not really satisfactory either.
> > Indeed, we have a property, that doesn't follow those requirements
> > either, with a driver-specific content, and that stands in the way of
> > fixes and further improvements at both the core framework and driver
> > levels.
> >
> > So having that new property still seems like a net improvement at the
> > driver, framework and uAPI levels, even if it's not entirely following
> > the requirements we have in place.
> >
> > Even more so since, realistically, those kind of interfaces will never
> > get any new development on the user-space side of things, it's
> > considered by everyone as legacy.
> >
> > This also is something we need to support at some point if we want to
> > completely deprecate the fbdev drivers and provide decent alternatives
> > in KMS.
> >
> > So yeah, strictly speaking, we would not qualify for our requirements
> > there. I still think we have a strong case for an exception though.
>
> Which requirements would that be? The only one I can see is the
> documentation and maybe an IGT test.
This is the one I had in mind
https://dri.freedesktop.org/docs/drm/gpu/drm-uapi.html#open-source-userspace-requirements
I overlooked yours obviously, so I'll update my patches to fix it.
Maxime
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next prev parent reply other threads:[~2022-08-16 9:49 UTC|newest]
Thread overview: 151+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-07-29 16:34 [PATCH v1 00/35] drm: Analog TV Improvements Maxime Ripard
2022-07-29 16:34 ` [PATCH v1 01/35] drm/atomic-helper: Rename drm_atomic_helper_connector_tv_reset to avoid ambiguity Maxime Ripard
2022-08-08 12:25 ` Noralf Trønnes
2022-07-29 16:34 ` [PATCH v1 02/35] drm/connector: Rename subconnector state variable Maxime Ripard
2022-08-08 12:26 ` Noralf Trønnes
2022-07-29 16:34 ` [PATCH v1 03/35] drm/atomic: Add TV subconnector property to get/set_property Maxime Ripard
2022-08-08 12:30 ` Noralf Trønnes
2022-08-15 7:35 ` Maxime Ripard
2022-08-15 10:48 ` Noralf Trønnes
2022-07-29 16:34 ` [PATCH v1 04/35] drm/modes: Introduce 480i and 576i modes Maxime Ripard
2022-08-02 13:58 ` Jani Nikula
2022-08-02 14:16 ` Thomas Zimmermann
2022-08-16 11:58 ` Maxime Ripard
2022-08-12 13:18 ` Geert Uytterhoeven
2022-08-16 13:26 ` Maxime Ripard
2022-08-16 15:00 ` Geert Uytterhoeven
2022-08-17 7:53 ` Maxime Ripard
2022-08-17 8:51 ` Geert Uytterhoeven
2022-08-17 13:14 ` Maxime Ripard
2022-08-17 14:01 ` Geert Uytterhoeven
2022-08-18 12:39 ` Maxime Ripard
2022-08-18 12:57 ` Geert Uytterhoeven
2022-08-18 13:42 ` Maxime Ripard
2022-08-18 15:34 ` Geert Uytterhoeven
2022-08-18 15:46 ` Maxime Ripard
2022-08-18 15:56 ` Geert Uytterhoeven
2022-08-24 16:42 ` Mateusz Kwiatkowski
2022-08-29 13:29 ` Maxime Ripard
2022-08-29 14:14 ` Geert Uytterhoeven
2022-08-29 14:33 ` Maxime Ripard
2022-07-29 16:34 ` [PATCH v1 05/35] drm/connector: Add TV standard property Maxime Ripard
2022-08-08 12:44 ` Noralf Trønnes
2022-08-16 8:26 ` Maxime Ripard
2022-08-16 9:42 ` Noralf Trønnes
2022-08-16 9:49 ` Maxime Ripard [this message]
2022-08-16 19:35 ` Noralf Trønnes
2022-08-17 11:46 ` Maxime Ripard
2022-08-17 13:11 ` Noralf Trønnes
2022-08-17 23:23 ` Noralf Trønnes
2022-08-18 15:01 ` Noralf Trønnes
2022-08-18 15:31 ` Maxime Ripard
2022-08-21 11:43 ` Noralf Trønnes
2022-08-26 8:21 ` Maxime Ripard
2022-08-18 15:27 ` Maxime Ripard
2022-08-12 13:25 ` Geert Uytterhoeven
2022-08-16 13:20 ` Maxime Ripard
2022-08-16 13:29 ` Geert Uytterhoeven
2022-08-16 14:11 ` Maxime Ripard
2022-08-16 14:43 ` Geert Uytterhoeven
2022-08-16 15:49 ` Maxime Ripard
2022-08-17 7:31 ` Geert Uytterhoeven
2022-08-17 7:32 ` Geert Uytterhoeven
2022-08-17 7:47 ` Maxime Ripard
2022-08-17 8:35 ` Geert Uytterhoeven
2022-08-17 11:14 ` Maxime Ripard
2022-08-17 13:05 ` Geert Uytterhoeven
2022-08-17 13:18 ` Maxime Ripard
2022-08-17 14:04 ` Geert Uytterhoeven
2022-08-18 14:54 ` Maxime Ripard
2022-08-18 15:20 ` Geert Uytterhoeven
2022-08-18 15:34 ` Maxime Ripard
2022-08-19 9:35 ` Geert Uytterhoeven
2022-08-25 13:39 ` Maxime Ripard
2022-08-20 20:12 ` Noralf Trønnes
2022-08-25 13:44 ` Maxime Ripard
2022-08-25 15:13 ` Noralf Trønnes
2022-08-29 8:28 ` Maxime Ripard
2022-07-29 16:34 ` [PATCH v1 06/35] drm/connector: Only register TV mode property if present Maxime Ripard
2022-08-08 12:49 ` Noralf Trønnes
2022-08-15 10:40 ` Maxime Ripard
2022-08-15 10:49 ` Noralf Trønnes
2022-07-29 16:34 ` [PATCH v1 07/35] drm/modes: Only consider bpp and refresh before options Maxime Ripard
2022-08-12 13:25 ` Geert Uytterhoeven
2022-08-16 12:20 ` Maxime Ripard
2022-07-29 16:34 ` [PATCH v1 08/35] drm/client: Add some tests for drm_connector_pick_cmdline_mode() Maxime Ripard
2022-08-02 10:14 ` Thomas Zimmermann
2022-08-15 8:42 ` Maxime Ripard
2022-07-29 16:34 ` [PATCH v1 09/35] drm/modes: Move named modes parsing to a separate function Maxime Ripard
2022-08-12 13:27 ` Geert Uytterhoeven
2022-08-16 13:46 ` Maxime Ripard
2022-08-16 14:44 ` Geert Uytterhoeven
2022-07-29 16:34 ` [PATCH v1 10/35] drm/modes: Switch to named mode descriptors Maxime Ripard
2022-07-29 16:34 ` [PATCH v1 11/35] drm/modes: Fill drm_cmdline mode from named modes Maxime Ripard
2022-07-29 16:34 ` [PATCH v1 12/35] drmi/modes: Properly generate a drm_display_mode from a named mode Maxime Ripard
2022-07-29 16:34 ` [PATCH v1 13/35] drm/atomic-helper: Add a TV properties reset helper Maxime Ripard
2022-07-29 16:34 ` [PATCH v1 14/35] drm/atomic-helper: Add an analog TV atomic_check implementation Maxime Ripard
2022-07-29 17:16 ` Mateusz Kwiatkowski
2022-08-15 8:30 ` Maxime Ripard
2022-07-29 16:34 ` [PATCH v1 15/35] drm/vc4: vec: Remove empty mode_fixup Maxime Ripard
2022-07-29 16:34 ` [PATCH v1 16/35] drm/vc4: vec: Convert to atomic helpers Maxime Ripard
2022-07-29 16:35 ` [PATCH v1 17/35] drm/vc4: vec: Refactor VEC TV mode setting Maxime Ripard
2022-07-29 16:35 ` [PATCH v1 18/35] drm/vc4: vec: Remove redundant atomic_mode_set Maxime Ripard
2022-07-29 16:35 ` [PATCH v1 19/35] drm/vc4: vec: Fix timings for VEC modes Maxime Ripard
2022-07-29 16:35 ` [PATCH v1 20/35] drm/vc4: vec: Switch for common modes Maxime Ripard
2022-07-29 18:12 ` Mateusz Kwiatkowski
2022-08-16 11:57 ` Maxime Ripard
2022-07-29 16:35 ` [PATCH v1 21/35] drm/vc4: vec: Fix definition of PAL-M mode Maxime Ripard
2022-07-29 16:35 ` [PATCH v1 22/35] drm/vc4: vec: Use TV Reset implementation Maxime Ripard
2022-07-30 3:03 ` kernel test robot
2022-07-29 16:35 ` [PATCH v1 23/35] drm/vc4: vec: Convert to the new TV mode property Maxime Ripard
2022-08-20 17:22 ` Noralf Trønnes
2022-08-24 15:26 ` Maxime Ripard
2022-08-25 13:14 ` Noralf Trønnes
2022-08-29 12:13 ` Maxime Ripard
2022-07-29 16:35 ` [PATCH v1 24/35] drm/vc4: vec: Add support for more analog TV standards Maxime Ripard
2022-07-29 17:55 ` Mateusz Kwiatkowski
2022-08-15 8:37 ` Maxime Ripard
2022-08-24 16:59 ` Mateusz Kwiatkowski
2022-07-29 16:35 ` [PATCH v1 25/35] drm/sun4i: tv: Remove unused mode_valid Maxime Ripard
2022-07-30 9:13 ` Jernej Škrabec
2022-07-29 16:35 ` [PATCH v1 26/35] drm/sun4i: tv: Convert to atomic hooks Maxime Ripard
2022-07-30 9:12 ` Jernej Škrabec
2022-07-29 16:35 ` [PATCH v1 27/35] drm/sun4i: tv: Merge mode_set into atomic_enable Maxime Ripard
2022-07-29 16:35 ` [PATCH v1 28/35] drm/sun4i: tv: Remove useless function Maxime Ripard
2022-07-29 16:35 ` [PATCH v1 29/35] drm/sun4i: tv: Remove useless destroy function Maxime Ripard
2022-07-30 9:14 ` Jernej Škrabec
2022-07-29 16:35 ` [PATCH v1 30/35] drm/sun4i: tv: Rename error label Maxime Ripard
2022-07-30 9:15 ` Jernej Škrabec
2022-07-29 16:35 ` [PATCH v1 31/35] drm/sun4i: tv: Add missing reset assertion Maxime Ripard
2022-07-30 9:16 ` Jernej Škrabec
2022-07-29 16:35 ` [PATCH v1 32/35] drm/sun4i: tv: Convert to the new TV mode property Maxime Ripard
2022-08-28 17:12 ` Noralf Trønnes
2022-07-29 16:35 ` [PATCH v1 33/35] drm/connector: Remove TV modes property Maxime Ripard
2022-07-29 20:06 ` kernel test robot
2022-07-29 20:16 ` kernel test robot
2022-07-29 16:35 ` [PATCH v1 34/35] drm/modes: Introduce the tv_mode property as a command-line option Maxime Ripard
2022-08-12 13:31 ` Geert Uytterhoeven
2022-08-16 13:51 ` Maxime Ripard
2022-08-20 20:18 ` Noralf Trønnes
2022-08-24 15:45 ` Maxime Ripard
2022-08-24 17:08 ` Mateusz Kwiatkowski
2022-08-25 12:41 ` Noralf Trønnes
2022-08-26 6:46 ` Maxime Ripard
2022-08-28 17:06 ` Noralf Trønnes
2022-07-29 16:35 ` [PATCH v1 35/35] drm/modes: Introduce more named modes Maxime Ripard
2022-08-21 16:16 ` Noralf Trønnes
2022-08-25 14:22 ` Maxime Ripard
2022-08-08 13:03 ` [PATCH v1 00/35] drm: Analog TV Improvements Noralf Trønnes
2022-08-21 16:33 ` Noralf Trønnes
2022-08-22 7:48 ` Maxime Ripard
2022-08-22 8:57 ` Mateusz Kwiatkowski
2022-08-25 15:55 ` Maxime Ripard
2022-08-25 16:17 ` Mateusz Kwiatkowski
2022-08-26 4:07 ` Mateusz Kwiatkowski
2022-08-26 8:39 ` Maxime Ripard
2022-08-26 14:56 ` Dom Cobley
2022-08-27 16:11 ` Noralf Trønnes
2022-08-30 21:31 ` kFYatek
2022-08-22 13:21 ` Noralf Trønnes
2022-08-25 16:21 ` Maxime Ripard
2022-08-25 19:36 ` Noralf Trønnes
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