[Nouveau] [PATCH v7 00/23] drm: Analog TV Improvements
Lukas Satin
luke.satin at gmail.com
Tue Nov 8 13:20:07 UTC 2022
One can switch from NTSC to PAL now using (on vc4)
modetest -M vc4 -s 53:720x480i -w 53:'TV mode':1 # NTSC
modetest -M vc4 -s 53:720x576i -w 53:'TV mode':4 # PAL
NTSC should be 640x480i, not 720. It will probably work on most TV's, but
NTSC by the spec is 640x480i.
On Mon, Nov 7, 2022 at 3:16 PM Maxime Ripard <maxime at cerno.tech> wrote:
> Hi,
>
> Here's a series aiming at improving the command line named modes support,
> and more importantly how we deal with all the analog TV variants.
>
> The named modes support were initially introduced to allow to specify the
> analog TV mode to be used.
>
> However, this was causing multiple issues:
>
> * The mode name parsed on the command line was passed directly to the
> driver, which had to figure out which mode it was suppose to match;
>
> * Figuring that out wasn't really easy, since the video= argument or what
> the userspace might not even have a name in the first place, but
> instead could have passed a mode with the same timings;
>
> * The fallback to matching on the timings was mostly working as long as
> we were supporting one 525 lines (most likely NSTC) and one 625 lines
> (PAL), but couldn't differentiate between two modes with the same
> timings (NTSC vs PAL-M vs NSTC-J for example);
>
> * There was also some overlap with the tv mode property registered by
> drm_mode_create_tv_properties(), but named modes weren't interacting
> with that property at all.
>
> * Even though that property was generic, its possible values were
> specific to each drivers, which made some generic support difficult.
>
> Thus, I chose to tackle in multiple steps:
>
> * A new TV mode property was introduced, with generic values, each driver
> reporting through a bitmask what standard it supports to the userspace;
>
> * This option was added to the command line parsing code to be able to
> specify it on the kernel command line, and new atomic_check and reset
> helpers were created to integrate properly into atomic KMS;
>
> * The named mode parsing code is now creating a proper display mode for
> the given named mode, and the TV standard will thus be part of the
> connector state;
>
> * Two drivers were converted and tested for now (vc4 and sun4i), with
> some backward compatibility code to translate the old TV mode to the
> new TV mode;
>
> Unit tests were created along the way.
>
> One can switch from NTSC to PAL now using (on vc4)
>
> modetest -M vc4 -s 53:720x480i -w 53:'TV mode':1 # NTSC
> modetest -M vc4 -s 53:720x576i -w 53:'TV mode':4 # PAL
>
> Let me know what you think,
> Maxime
>
> To: David Airlie <airlied at linux.ie>
> To: Daniel Vetter <daniel at ffwll.ch>
> To: Maarten Lankhorst <maarten.lankhorst at linux.intel.com>
> To: Maxime Ripard <mripard at kernel.org>
> To: Thomas Zimmermann <tzimmermann at suse.de>
> To: Emma Anholt <emma at anholt.net>
> To: Jani Nikula <jani.nikula at linux.intel.com>
> To: Joonas Lahtinen <joonas.lahtinen at linux.intel.com>
> To: Rodrigo Vivi <rodrigo.vivi at intel.com>
> To: Tvrtko Ursulin <tvrtko.ursulin at linux.intel.com>
> To: Ben Skeggs <bskeggs at redhat.com>
> To: Karol Herbst <kherbst at redhat.com>
> To: Lyude Paul <lyude at redhat.com>
> To: Chen-Yu Tsai <wens at csie.org>
> To: Jernej Skrabec <jernej.skrabec at gmail.com>
> To: Samuel Holland <samuel at sholland.org>
> Cc: Geert Uytterhoeven <geert at linux-m68k.org>
> Cc: Mateusz Kwiatkowski <kfyatek+publicgit at gmail.com>
> Cc: "Noralf Trønnes" <noralf at tronnes.org>
> Cc: Dave Stevenson <dave.stevenson at raspberrypi.com>
> Cc: Dom Cobley <dom at raspberrypi.com>
> Cc: Phil Elwell <phil at raspberrypi.com>
> Cc: <dri-devel at lists.freedesktop.org>
> Cc: linux-kernel at vger.kernel.org
> Cc: intel-gfx at lists.freedesktop.org
> Cc: nouveau at lists.freedesktop.org
> Cc: linux-arm-kernel at lists.infradead.org
> Cc: linux-sunxi at lists.linux.dev
> Cc: Hans de Goede <hdegoede at redhat.com>
> Signed-off-by: Maxime Ripard <maxime at cerno.tech>
>
> ---
> Changes in v7:
> - Switch to another implementation of get_modes from Noralf
> - Made more checks in VEC's atomic_check
> - Fixed typo in a commit log
> - Checked for tv_mode_specified in
> drm_mode_parse_command_line_for_connector
> - Rebased on drm-misc-next-2022-11-03
> - Link to v6:
> https://lore.kernel.org/r/20220728-rpi-analog-tv-properties-v6-0-e7792734108f@cerno.tech
>
> Changes in v6:
> - Add and convert to a new get_modes helper to create the PAL and NTSC
> modes in
> the proper order, with the right preferred mode flag, depending on the
> driver
> capabilities and defaults.
> - Support PAL60
> - Renamed tests to be consistent with DRM tests naming convention
> - Simplified a bit the named mode parsing code
> - Add a tv_mode_specified field
> - Return 0 in get_modes implementations instead of error codes
> - Link to v5:
> https://lore.kernel.org/r/20220728-rpi-analog-tv-properties-v5-0-d841cc64fe4b@cerno.tech
>
> Changes in v5:
> - Dropped TV Standard documentation removal
> - Switched the TV Mode documentation from CSV to actual documentation
> - Switched to kunit assertions where possible
> - Switched to KUNIT_ASSERT_NOT_NULL instead of KUNIT_ASSERT_PTR_NE(...,
> NULL)
> - Shuffled a bit the introduction of
> drm_client_modeset_connector_get_modes between patches
> - Renamed tv_mode_names to legacy_tv_mode_names
> - Removed the count variable in sun4i_tv_comp_get_modes
> - Rebased on top of current drm-misc-next
> - Link to v4:
> https://lore.kernel.org/r/20220728-rpi-analog-tv-properties-v4-0-60d38873f782@cerno.tech
>
> Changes in v4:
> - Removed the unused TV Standard property documentation
> - Added the TV Mode property documentation to kms-properties.csv
> - Fixed the documentation of drm_mode_create_tv_properties()
> - Removed DRM_MODE_TV_MODE_NONE
> - Reworded the line length check comment in drm_mode_analog_tv tests
> - Switched to HZ_PER_KHZ in drm_mode_analog_tv tests
> - Reworked drm_mode_analog_tv to fill our mode using the previously
> computed
> timings
> - Added the command-line option documentation to modedb.rst
> - Improved the Kunit helpers cleanup
> - Moved the subconnector documentation renaming to the proper patch
> - Added the various review tags
> - Removed the count variable in vc4_vec_connector_get_modes
> - Rebased on drm-misc-next-2022-09-23 and fixed a merge conflict
> - Folded all the named mode parsing improvements in a single patch
> - Link to v3:
> https://lore.kernel.org/r/20220728-rpi-analog-tv-properties-v2-0-f733a0ed9f90@cerno.tech
>
> Changes in v3:
> - Applied some of the fixes to vc4 and sun4i
> - Renamed the old TV mode property to legacy_mode
> - Fixed a bunch of bisection errors
> - Removed most of the redundant TV modes
> - Added a new None TV mode to not fall back on NTSC by mistake
> - Fixed the mode generation function to match better what is expected
> - Added some logging to the mode generation function
> - Split the improvements to the named mode parsing logic into separate
> patches
> - Added more checks to the TV atomic_check helper
> - Link to v2:
> https://lore.kernel.org/dri-devel/20220728-rpi-analog-tv-properties-v2-0-459522d653a7@cerno.tech/
>
> Changes in v2:
> - Kept the older TV mode property as legacy so we can keep the old drivers
> functional
> - Renamed the tv_norm property to tv_mode
> - Added a function to create PAL and NTSC compatible display modes
> - Added some helpers to instantiate a mock DRM device in Kunit
> - More Kunit tests
> - Removed the HD analog TV modes
> - Renamed some of the tests
> - Renamed some of the named modes
> - Fixed typos in commit logs
> - Added the various tags
> - Link to v1:
> https://lore.kernel.org/dri-devel/20220728-rpi-analog-tv-properties-v1-0-3d53ae722097@cerno.tech/
>
> ---
> Mateusz Kwiatkowski (2):
> drm/vc4: vec: Check for VEC output constraints
> drm/vc4: vec: Add support for more analog TV standards
>
> Maxime Ripard (20):
> drm/tests: Add Kunit Helpers
> drm/connector: Rename legacy TV property
> drm/connector: Only register TV mode property if present
> drm/connector: Rename drm_mode_create_tv_properties
> drm/connector: Add TV standard property
> drm/modes: Add a function to generate analog display modes
> drm/client: Add some tests for drm_connector_pick_cmdline_mode()
> drm/modes: Move named modes parsing to a separate function
> drm/modes: Switch to named mode descriptors
> drm/modes: Fill drm_cmdline mode from named modes
> drm/connector: Add pixel clock to cmdline mode
> drm/connector: Add a function to lookup a TV mode by its name
> drm/modes: Introduce the tv_mode property as a command-line option
> drm/modes: Properly generate a drm_display_mode from a named mode
> drm/modes: Introduce more named modes
> drm/atomic-helper: Add a TV properties reset helper
> drm/atomic-helper: Add an analog TV atomic_check implementation
> drm/vc4: vec: Use TV Reset implementation
> drm/vc4: vec: Convert to the new TV mode property
> drm/sun4i: tv: Convert to the new TV mode property
>
> Noralf Trønnes (1):
> drm/probe-helper: Provide a TV get_modes helper
>
> Documentation/fb/modedb.rst | 2 +
> Documentation/gpu/drm-kms.rst | 6 +
> drivers/gpu/drm/drm_atomic_state_helper.c | 124 +++++
> drivers/gpu/drm/drm_atomic_uapi.c | 4 +
> drivers/gpu/drm/drm_client_modeset.c | 4 +
> drivers/gpu/drm/drm_connector.c | 173 ++++++-
> drivers/gpu/drm/drm_modes.c | 639
> +++++++++++++++++++++++-
> drivers/gpu/drm/drm_probe_helper.c | 97 ++++
> drivers/gpu/drm/gud/gud_connector.c | 10 +-
> drivers/gpu/drm/i2c/ch7006_drv.c | 6 +-
> drivers/gpu/drm/i915/display/intel_tv.c | 5 +-
> drivers/gpu/drm/nouveau/dispnv04/tvnv17.c | 6 +-
> drivers/gpu/drm/sun4i/sun4i_tv.c | 141 ++----
> drivers/gpu/drm/tests/Makefile | 3 +
> drivers/gpu/drm/tests/drm_client_modeset_test.c | 229 +++++++++
> drivers/gpu/drm/tests/drm_cmdline_parser_test.c | 67 +++
> drivers/gpu/drm/tests/drm_connector_test.c | 90 ++++
> drivers/gpu/drm/tests/drm_kunit_helpers.c | 61 +++
> drivers/gpu/drm/tests/drm_kunit_helpers.h | 9 +
> drivers/gpu/drm/tests/drm_modes_test.c | 144 ++++++
> drivers/gpu/drm/vc4/vc4_vec.c | 342 +++++++++++--
> include/drm/drm_atomic_state_helper.h | 4 +
> include/drm/drm_connector.h | 89 +++-
> include/drm/drm_mode_config.h | 12 +-
> include/drm/drm_modes.h | 17 +
> include/drm/drm_probe_helper.h | 1 +
> 26 files changed, 2081 insertions(+), 204 deletions(-)
> ---
> base-commit: 3b536e43463ed91b7bf9acec1eb4da0bc677dc43
> change-id: 20220728-rpi-analog-tv-properties-0914dfcee460
>
> Best regards,
> --
> Maxime Ripard <maxime at cerno.tech>
>
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