linux-stable.git/drivers/gpu/drm/mgag200, branch v6.8

Merge tag 'i2c-for-6.8-rc1-rebased' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux

2024-01-19T01:29:01+00:00

Pull i2c updates from Wolfram Sang:
 "This removes the currently unused CLASS_DDC support (controllers set
  the flag, but there is no client to use it).

  Also, CLASS_SPD support gets simplified to prepare removal in the
  future. Class based instantiation is not recommended these days
  anyhow.

  Furthermore, I2C core now creates a debugfs directory per I2C adapter.
  Current bus driver users were converted to use it.

  Finally, quite some driver updates. Standing out are patches for the
  wmt-driver which is refactored to support more variants.

  This is the rebased pull request where a large series for the
  designware driver was dropped"

* tag 'i2c-for-6.8-rc1-rebased' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux: (38 commits)
  MAINTAINERS: use proper email for my I2C work
  i2c: stm32f7: add support for stm32mp25 soc
  i2c: stm32f7: perform I2C_ISR read once at beginning of event isr
  dt-bindings: i2c: document st,stm32mp25-i2c compatible
  i2c: stm32f7: simplify status messages in case of errors
  i2c: stm32f7: perform most of irq job in threaded handler
  i2c: stm32f7: use dev_err_probe upon calls of devm_request_irq
  i2c: i801: Add lis3lv02d for Dell XPS 15 7590
  i2c: i801: Add lis3lv02d for Dell Precision 3540
  i2c: wmt: Reduce redundant: REG_CR setting
  i2c: wmt: Reduce redundant: function parameter
  i2c: wmt: Reduce redundant: clock mode setting
  i2c: wmt: Reduce redundant: wait event complete
  i2c: wmt: Reduce redundant: bus busy check
  i2c: mux: reg: Remove class-based device auto-detection support
  i2c: make i2c_bus_type const
  dt-bindings: at24: add ROHM BR24G04
  eeprom: at24: use of_match_ptr()
  i2c: cpm: Remove linux,i2c-index conversion from be32
  i2c: imx: Make SDA actually optional for bus recovering
  ...

drm: remove I2C_CLASS_DDC support

2024-01-18T20:10:41+00:00

After removal of the legacy EEPROM driver and I2C_CLASS_DDC support in
olpc_dcon there's no i2c client driver left supporting I2C_CLASS_DDC.
Class-based device auto-detection is a legacy mechanism and shouldn't
be used in new code. So we can remove this class completely now.

Acked-by: Alex Deucher 
Acked-by: Dmitry Baryshkov 
Acked-by: Harry Wentland 
Acked-by: Heiko Stuebner 
Acked-by: Jani Nikula 
Acked-by: Jernej Skrabec 
Reviewed-by: Thomas Zimmermann 
Reviewed-by: Andi Shyti 
Reviewed-by: AngeloGioacchino Del Regno 
Reviewed-by: Neil Armstrong 
Signed-off-by: Heiner Kallweit 
Signed-off-by: Wolfram Sang

drm/mgag200: Fix gamma lut not initialized for G200ER, G200EV, G200SE

2023-12-20T12:26:57+00:00

When mgag200 switched from simple KMS to regular atomic helpers,
the initialization of the gamma settings was lost.
This leads to a black screen, if the bios/uefi doesn't use the same
pixel color depth.
This has been fixed with commit ad81e23426a6 ("drm/mgag200: Fix gamma
lut not initialized.") for most G200, but G200ER, G200EV, G200SE use
their own version of crtc_helper_atomic_enable() and need to be fixed
too.

Fixes: 1baf9127c482 ("drm/mgag200: Replace simple-KMS with regular atomic helpers")
Cc:  #v6.1+
Reported-by: Roger Sewell 
Suggested-by: Roger Sewell 
Signed-off-by: Jocelyn Falempe 
Reviewed-by: Thomas Zimmermann 
Link: https://patchwork.freedesktop.org/patch/msgid/20231214163849.359691-1-jfalempe@redhat.com

drm: Call drm_atomic_helper_shutdown() at shutdown/remove time for misc drivers

2023-09-21T17:51:55+00:00

Based on grepping through the source code these drivers appear to be
missing a call to drm_atomic_helper_shutdown() at system shutdown time
and at driver remove (or unbind) time. Among other things, this means
that if a panel is in use that it won't be cleanly powered off at
system shutdown time.

The fact that we should call drm_atomic_helper_shutdown() in the case
of OS shutdown/restart and at driver remove (or unbind) time comes
straight out of the kernel doc "driver instance overview" in
drm_drv.c.

A few notes about these fixes:
- I confirmed that these drivers were all DRIVER_MODESET type drivers,
  which I believe makes this relevant.
- I confirmed that these drivers were all DRIVER_ATOMIC.
- When adding drm_atomic_helper_shutdown() to the remove/unbind path,
  I added it after drm_kms_helper_poll_fini() when the driver had
  it. This seemed to be what other drivers did. If
  drm_kms_helper_poll_fini() wasn't there I added it straight after
  drm_dev_unregister().
- This patch deals with drivers using the component model in similar
  ways as the patch ("drm: Call drm_atomic_helper_shutdown() at
  shutdown time for misc drivers")
- These fixes rely on the patch ("drm/atomic-helper:
  drm_atomic_helper_shutdown(NULL) should be a noop") to simplify
  shutdown.

Suggested-by: Maxime Ripard 
Reviewed-by: Tomi Valkeinen 
Tested-by: Tomi Valkeinen  # tilcdc
Acked-by: Maxime Ripard 
Signed-off-by: Douglas Anderson 
Link: https://patchwork.freedesktop.org/patch/msgid/20230901163944.RFT.5.I771eb4bd03d8772b19e7dcfaef3e2c167bce5846@changeid

drm/mgag200: set variable mgag200_modeset storage-class-specifier to static

2023-06-23T08:33:00+00:00

smatch reports
drivers/gpu/drm/mgag200/mgag200_drv.c:23:5: warning: symbol
  'mgag200_modeset' was not declared. Should it be static?

This variable is only used in its defining file, so it should be static

Signed-off-by: Tom Rix 
Reviewed-by: Jocelyn Falempe 
Reviewed-by: Thomas Zimmermann 
Signed-off-by: Jocelyn Falempe 
Link: https://patchwork.freedesktop.org/patch/msgid/20230517134140.874179-1-trix@redhat.com

Merge drm/drm-fixes into drm-misc-fixes

2023-05-12T07:47:12+00:00

Let's bring 6.4-rc1 in drm-misc-fixes to start the new fix cycle.

Signed-off-by: Maxime Ripard

drm/mgag200: Fix gamma lut not initialized.

2023-05-11T13:20:11+00:00

When mgag200 switched from simple KMS to regular atomic helpers,
the initialization of the gamma settings was lost.
This leads to a black screen, if the bios/uefi doesn't use the same
pixel color depth.

v2: rebase on top of drm-misc-fixes, and add Cc stable tag.

Link: https://bugzilla.redhat.com/show_bug.cgi?id=2171155
Fixes: 1baf9127c482 ("drm/mgag200: Replace simple-KMS with regular atomic helpers")
Cc: 
Tested-by: Phil Oester 
Reviewed-by: Thomas Zimmermann 
Signed-off-by: Jocelyn Falempe 
Link: https://patchwork.freedesktop.org/patch/msgid/20230510131034.284078-1-jfalempe@redhat.com

drm/mgag200: Implement struct drm_plane_helper_funcs.atomic_enable

2023-02-20T14:20:41+00:00

Enable the primary plane for mgag200 hardware via atomic_enable.
Atomic helpers invoke this callback only when the plane becomes
active.

Signed-off-by: Thomas Zimmermann 
Reviewed-by: Javier Martinez Canillas 
Link: https://patchwork.freedesktop.org/patch/msgid/20230209154107.30680-5-tzimmermann@suse.de

drm/mgag200: Remove disable handling from atomic_update

2023-02-20T14:20:30+00:00

The primary plane has the atomic_disable helper set, so atomic_update
won't be called if the plane gets disabled. Remove the respective branch
from the helper.

Signed-off-by: Thomas Zimmermann 
Reviewed-by: Javier Martinez Canillas 
Link: https://patchwork.freedesktop.org/patch/msgid/20230209154107.30680-4-tzimmermann@suse.de

drm: Only select I2C_ALGOBIT for drivers that actually need it

2023-01-10T10:15:44+00:00

While working on a drm driver that doesn't need the i2c algobit stuff I
noticed that DRM selects this code even though only 8 drivers actually use
it. While also only some drivers use i2c, keep the select for I2C for the
next cleanup patch. Still prepare this already by also selecting I2C for
the individual drivers.

Signed-off-by: Uwe Kleine-König 
Reviewed-by: Javier Martinez Canillas 
Signed-off-by: Javier Martinez Canillas 
Link: https://patchwork.freedesktop.org/patch/msgid/20221219083627.1401627-1-u.kleine-koenig@pengutronix.de