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[00/86] drm: Provide client setup helper and convert drivers

Message ID 20240816125408.310253-1-tzimmermann@suse.de (mailing list archive)
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Series drm: Provide client setup helper and convert drivers | expand

Message

Thomas Zimmermann Aug. 16, 2024, 12:22 p.m. UTC 
Provide drm_client_setup() to initialize in-kernel DRM clients. Then
convert all drivers to the new interface. Remove old interfaces for
the fbdev client.

So far, the only supported DRM client in the kernel is for fbdev
emulation with its fbcon support. Long term, we want to move away
from fbcon. Possible replacements are DRM-based loggers, boot-up
logos or maybe even a console. The exact kind of client should be
configurable by the user. You can find examples of such clients at
[1] and [2].

To do this, we need one single interface for drivers to initialize
the configured in-kernel clients, replacing the current call to
initialize fbdev emulation. The fbdev emulation also depends on the
DRM driver's management, so drivers differ in what fbdev code they
run. We need to abstract this as well.

This patchset addresses these topics. While there are many patches,
most of them are small, straight-forward changes to drivers or
rearrange existing code.

Patches 1 to 3 add a driver-neutral setup function for the fbdev
client. The new callback fbdev_probe in struct drm_driver creates
the GEM buffer for fbdev output. It replaces the existing callback
fb_probe from struct drm_fb_helper_funcs, which currently does the
same. The client code is equal to code in exisisting fbdev emulation,
except for its use of fbdev_probe.

Patch 4 adds drm_client_setup(), a client-agnostic interface to
initialize the in-kernel DRM clients. It only supports the new fbdev
emulation setup, but additional clients will be added here. Hopefully
this will hide future changes to DRM client initialization from
drivers.

Patches 5 to 49 rework all drivers with GEM memory management based
on DMA helpers. This is fairly straigh-forward. The fbdev-dma helpers
provide an implementation of the fbdev_probe helpers. Each driver
sets the new callback in its instance of struct drm_driver and calls
drm_client_setup(). Then the old fbdev-dma client goes away.

Patches 50 to 63 do the same for drivers with SHMEM-based GEM memory
management. The fbdev client code is again the same as before, except
for the fbdev_probe callback.

Patches 64 to 73 do the same for drivers with TTM-based GEM memory
management.

Patches 74 to 85 do the same for the remaining drivers with custom
fbdev emulation. As before, the new fbdev client code is mostly the
same the old one; except for the fbdev_probe function. The changes
for i915/xe and omapdrm are a bit mor einvolved, but nothing too
complicated.

Patch 86 removes the obsolete fb_probe callback from struct
drm_fb_helper_funcs.

This patchset has been tested on various hardware with the various
memory managers involved.

[1] https://lore.kernel.org/dri-devel/20240801100640.462606-4-jfalempe@redhat.com/
[2] https://lists.freedesktop.org/archives/dri-devel/2019-March/212113.html

Thomas Zimmermann (86):
  drm/fbdev-helper: Move color-mode lookup into 4CC format helper
  drm/fbdev-helper: Set and clear VGA switcheroo client from fb_info
  drm/fbdev: Add memory-agnostic fbdev client
  drm: Add client-agnostic setup helper
  drm/fbdev-dma: Support struct drm_driver.fbdev_probe
  drm/arcgpu: Run DRM default client setup
  drm/arm/komeda: Run DRM default client setup
  drm/arm/hdlcd: Run DRM default client setup
  drm/arm/malidp: Run DRM default client setup
  drm/aspeed: Run DRM default client setup
  drm/atmel-hdlcd: Run DRM default client setup
  drm/fsl-dcu: Run DRM default client setup
  drm/hisilicon/kirin: Run DRM default client setup
  drm/hx8357d: Run DRM default client setup
  drm/ili9163: Run DRM default client setup
  drm/ili9225: Run DRM default client setup
  drm/ili9341: Run DRM default client setup
  drm/ili9486: Run DRM default client setup
  drm/imx/dcss: Run DRM default client setup
  drm/imx/ipuv3: Run DRM default client setup
  drm/imx/lcdc: Run DRM default client setup
  drm/ingenic: Run DRM default client setup
  drm/kmb: Run DRM default client setup
  drm/logicvc: Run DRM default client setup
  drm/mcde: Run DRM default client setup
  drm/mediatek: Run DRM default client setup
  drm/meson: Run DRM default client setup
  drm/mi0283qt: Run DRM default client setup
  drm/mxsfb/lcdif: Run DRM default client setup
  drm/msxfb: Run DRM default client setup
  drm/panel/ili9341: Run DRM default client setup
  drm/panel-mipi-dbi: Run DRM default client setup
  drm/pl111: Run DRM default client setup
  drm/renesas/rcar-du: Run DRM default client setup
  drm/renesas/rz-du: Run DRM default client setup
  drm/renesas/shmobile: Run DRM default client setup
  drm/repaper: Run DRM default client setup
  drm/rockchip: Run DRM default client setup
  drm/sti: Run DRM default client setup
  drm/stm: Run DRM default client setup
  drm/sun4i: Run DRM default client setup
  drm/tidss: Run DRM default client setup
  drm/tilcdc: Run DRM default client setup
  drm/st7586: Run DRM default client setup
  drm/st7735r: Run DRM default client setup
  drm/tve200: Run DRM default client setup
  drm/vc4: Run DRM default client setup
  drm/xlnx: Run DRM default client setup
  drm/fbdev-dma: Remove obsolete setup function
  drm/fbdev-shmem: Support struct drm_driver.fbdev_probe
  drm/ast: Run DRM default client setup
  drm/cirrus: Run DRM default client setup
  drm/gm12u320: Run DRM default client setup
  drm/gud: Run DRM default client setup
  drm/hyperv_drm: Run DRM default client setup
  drm/mgag200: Run DRM default client setup
  drm/ofdrm: Use DRM default client setup
  drm/simpledrm: Run DRM default client setup
  drm/solomon: Run DRM default client setup
  drm/udl: Run DRM default client setup
  drm/virtgpu: Run DRM default client setup
  drm/vkms: Run DRM default client setup
  drm/fbdev-shmem: Remove obsolete setup function
  drm/fbdev-ttm: Support struct drm_driver.fbdev_probe
  drm/amdgpu: Run DRM default client setup
  drm/bochs: Run DRM default client setup
  drm/hisilicon/hibmc: Run DRM default client setup
  drm/loongson: Run DRM default client setup
  drm/nouveau: Run DRM default client setup
  drm/qxl: Run DRM default client setup
  drm/vboxvideo: Run DRM default client setup
  drm/vmwgfx: Run DRM default client setup
  drm/fbdev-ttm: Remove obsolete setup function
  drm/armada: Run DRM default client setup
  drm/exynos-drm: Run DRM default client setup
  drm/gma500: Run DRM default client setup
  drm/msm: Run DRM default client setup
  drm/radeon: Run DRM default client setup
  drm/tegra: Run DRM default client setup
  drm/i915: Remove struct drm_fb_helper from struct intel_fbdev
  drm/i915: Move custom restore code into separate callback
  drm/i915: Move custom hotplug code into separate callback
  drm/{i915,xe}: Run DRM default client setup
  drm/omapdrm: Remove struct drm_fb_helper from struct omap_fbdev.
  drm/omapdrm: Run DRM default client setup
  drm/fb-helper: Remove struct drm_fb_helper.fb_probe

 drivers/gpu/drm/Makefile                      |   5 +-
 drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c       |   7 +-
 .../gpu/drm/arm/display/komeda/komeda_drv.c   |   4 +-
 .../gpu/drm/arm/display/komeda/komeda_kms.c   |   2 +
 drivers/gpu/drm/arm/hdlcd_drv.c               |   4 +-
 drivers/gpu/drm/arm/malidp_drv.c              |   4 +-
 drivers/gpu/drm/armada/armada_drm.h           |  11 +-
 drivers/gpu/drm/armada/armada_drv.c           |   4 +-
 drivers/gpu/drm/armada/armada_fbdev.c         | 115 +-------
 drivers/gpu/drm/aspeed/aspeed_gfx_drv.c       |   3 +-
 drivers/gpu/drm/ast/ast_drv.c                 |   6 +-
 drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c  |   4 +-
 drivers/gpu/drm/drm_client_setup.c            |  55 ++++
 drivers/gpu/drm/drm_fb_helper.c               | 109 +++-----
 drivers/gpu/drm/drm_fbdev_client.c            | 132 +++++++++
 drivers/gpu/drm/drm_fbdev_dma.c               | 170 +++--------
 drivers/gpu/drm/drm_fbdev_shmem.c             | 170 +++--------
 drivers/gpu/drm/drm_fbdev_ttm.c               | 225 ++++-----------
 drivers/gpu/drm/drm_fourcc.c                  |  30 +-
 drivers/gpu/drm/exynos/exynos_drm_drv.c       |   4 +-
 drivers/gpu/drm/exynos/exynos_drm_fbdev.c     | 101 +------
 drivers/gpu/drm/exynos/exynos_drm_fbdev.h     |  15 +-
 drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.c     |   4 +-
 drivers/gpu/drm/gma500/fbdev.c                | 100 +------
 drivers/gpu/drm/gma500/psb_drv.c              |   4 +-
 drivers/gpu/drm/gma500/psb_drv.h              |  12 +-
 drivers/gpu/drm/gud/gud_drv.c                 |   4 +-
 .../gpu/drm/hisilicon/hibmc/hibmc_drm_drv.c   |   4 +-
 .../gpu/drm/hisilicon/kirin/kirin_drm_ade.c   |   2 +
 .../gpu/drm/hisilicon/kirin/kirin_drm_drv.c   |   4 +-
 drivers/gpu/drm/hyperv/hyperv_drm_drv.c       |   4 +-
 drivers/gpu/drm/i915/display/intel_fbdev.c    | 263 ++++++------------
 drivers/gpu/drm/i915/display/intel_fbdev.h    |   8 +
 drivers/gpu/drm/i915/i915_driver.c            |   2 +
 drivers/gpu/drm/imx/dcss/dcss-kms.c           |   4 +-
 drivers/gpu/drm/imx/ipuv3/imx-drm-core.c      |   4 +-
 drivers/gpu/drm/imx/lcdc/imx-lcdc.c           |   4 +-
 drivers/gpu/drm/ingenic/ingenic-drm-drv.c     |   4 +-
 drivers/gpu/drm/kmb/kmb_drv.c                 |   4 +-
 drivers/gpu/drm/logicvc/logicvc_drm.c         |  11 +-
 drivers/gpu/drm/loongson/lsdc_drv.c           |   4 +-
 drivers/gpu/drm/mcde/mcde_drv.c               |   4 +-
 drivers/gpu/drm/mediatek/mtk_drm_drv.c        |   4 +-
 drivers/gpu/drm/meson/meson_drv.c             |   4 +-
 drivers/gpu/drm/mgag200/mgag200_drv.c         |   5 +-
 drivers/gpu/drm/msm/msm_drv.c                 |   4 +-
 drivers/gpu/drm/msm/msm_drv.h                 |  13 +-
 drivers/gpu/drm/msm/msm_fbdev.c               | 144 ++--------
 drivers/gpu/drm/mxsfb/lcdif_drv.c             |   4 +-
 drivers/gpu/drm/mxsfb/mxsfb_drv.c             |   4 +-
 drivers/gpu/drm/nouveau/nouveau_drm.c         |   7 +-
 drivers/gpu/drm/omapdrm/omap_drv.c            |   1 +
 drivers/gpu/drm/omapdrm/omap_drv.h            |   3 +
 drivers/gpu/drm/omapdrm/omap_fbdev.c          | 161 +++--------
 drivers/gpu/drm/omapdrm/omap_fbdev.h          |   8 +
 drivers/gpu/drm/panel/panel-ilitek-ili9341.c  |   4 +-
 drivers/gpu/drm/pl111/pl111_drv.c             |   4 +-
 drivers/gpu/drm/qxl/qxl_drv.c                 |   4 +-
 drivers/gpu/drm/radeon/radeon_drv.c           |  13 +-
 drivers/gpu/drm/radeon/radeon_fbdev.c         | 114 +-------
 drivers/gpu/drm/radeon/radeon_mode.h          |  12 +-
 drivers/gpu/drm/renesas/rcar-du/rcar_du_drv.c |   4 +-
 drivers/gpu/drm/renesas/rz-du/rzg2l_du_drv.c  |   4 +-
 .../gpu/drm/renesas/shmobile/shmob_drm_drv.c  |   5 +-
 drivers/gpu/drm/rockchip/rockchip_drm_drv.c   |   4 +-
 drivers/gpu/drm/solomon/ssd130x.c             |   4 +-
 drivers/gpu/drm/sti/sti_drv.c                 |   4 +-
 drivers/gpu/drm/stm/drv.c                     |   5 +-
 drivers/gpu/drm/sun4i/sun4i_drv.c             |   4 +-
 drivers/gpu/drm/tegra/drm.c                   |   5 +-
 drivers/gpu/drm/tegra/drm.h                   |  12 +-
 drivers/gpu/drm/tegra/fbdev.c                 |  98 +------
 drivers/gpu/drm/tidss/tidss_drv.c             |   4 +-
 drivers/gpu/drm/tilcdc/tilcdc_drv.c           |   4 +-
 drivers/gpu/drm/tiny/arcpgu.c                 |   4 +-
 drivers/gpu/drm/tiny/bochs.c                  |   4 +-
 drivers/gpu/drm/tiny/cirrus.c                 |   4 +-
 drivers/gpu/drm/tiny/gm12u320.c               |   4 +-
 drivers/gpu/drm/tiny/hx8357d.c                |   4 +-
 drivers/gpu/drm/tiny/ili9163.c                |   4 +-
 drivers/gpu/drm/tiny/ili9225.c                |   4 +-
 drivers/gpu/drm/tiny/ili9341.c                |   4 +-
 drivers/gpu/drm/tiny/ili9486.c                |   4 +-
 drivers/gpu/drm/tiny/mi0283qt.c               |   4 +-
 drivers/gpu/drm/tiny/ofdrm.c                  |   9 +-
 drivers/gpu/drm/tiny/panel-mipi-dbi.c         |   4 +-
 drivers/gpu/drm/tiny/repaper.c                |   4 +-
 drivers/gpu/drm/tiny/simpledrm.c              |   9 +-
 drivers/gpu/drm/tiny/st7586.c                 |   4 +-
 drivers/gpu/drm/tiny/st7735r.c                |   4 +-
 drivers/gpu/drm/tve200/tve200_drv.c           |   9 +-
 drivers/gpu/drm/udl/udl_drv.c                 |   4 +-
 drivers/gpu/drm/vboxvideo/vbox_drv.c          |   4 +-
 drivers/gpu/drm/vc4/vc4_drv.c                 |   5 +-
 drivers/gpu/drm/virtio/virtgpu_drv.c          |   6 +-
 drivers/gpu/drm/vkms/vkms_drv.c               |   4 +-
 drivers/gpu/drm/vmwgfx/vmwgfx_drv.c           |   5 +-
 drivers/gpu/drm/xe/xe_device.c                |   3 +
 drivers/gpu/drm/xlnx/zynqmp_kms.c             |   4 +-
 include/drm/drm_client_setup.h                |  12 +
 include/drm/drm_drv.h                         |  18 ++
 include/drm/drm_fb_helper.h                   |  43 +--
 include/drm/drm_fbdev_client.h                |  19 ++
 include/drm/drm_fbdev_dma.h                   |  13 +-
 include/drm/drm_fbdev_shmem.h                 |  13 +-
 include/drm/drm_fbdev_ttm.h                   |  15 +-
 include/drm/drm_fourcc.h                      |   1 +
 107 files changed, 994 insertions(+), 1558 deletions(-)
 create mode 100644 drivers/gpu/drm/drm_client_setup.c
 create mode 100644 drivers/gpu/drm/drm_fbdev_client.c
 create mode 100644 include/drm/drm_client_setup.h
 create mode 100644 include/drm/drm_fbdev_client.h


base-commit: 70d6d55dea574b7b78ccf714699cc5d8d62fcc2c