devm_drm_bridge_alloc() [0] is the new API to allocate and initialize a DRM
bridge, and the only one supported from now on. It is the first milestone
towards removal of bridges from a still existing DRM pipeline without
use-after-free.
The steps in the grand plan [1] are:
1. ➜ add refcounting to DRM bridges (struct drm_bridge)
2. handle gracefully atomic updates during bridge removal
3. avoid DSI host drivers to have dangling pointers to DSI devices
4. finish the hotplug bridge work, removing the "always-disconnected"
connector, moving code to the core and potentially removing the
hotplug-bridge itself (this needs to be clarified as points 1-3 are
developed)
This series is part of step 1 of the grand plan.
Current tasks in step 1 of the grand plan:
A. ✔ add new alloc API and refcounting -> (now in drm-misc-next)
B. ➜ convert all bridge drivers to new API (this series)
C. … documentation, kunit tests (v1 under discussion)
D. after (B), add get/put to drm_bridge_add/remove() + attach/detech()
E. after (B), convert accessors; this is a large work and can be done
in chunks
F. debugfs improvements
More info about this series in the v2 cover [2].
Luca
[0]
https://gitlab.freedesktop.org/drm/misc/kernel/-/commit/0cc6aadd7fc1e629b715ea3d1ba537ef2da95eec
[1]
https://lore.kernel.org/lkml/20250206-hotplug-drm-bridge-v6-0-9d6f2c9c3...@bootlin.com/t/#u
[2]
https://lore.kernel.org/lkml/20250424-drm-bridge-convert-to-alloc-api-v2-0-8f91a404d...@bootlin.com/
Signed-off-by: Luca Ceresoli <luca.ceres...@bootlin.com>
---
Changes in v3:
- Fixed issues reported for some patches
- Added review tags
- Removed patches that have been applied
- Added revert for the exynos patch, applied by mistake
- Update cover with grand plan info and trim some of it
- Updated bouncing e-mail address in Cc list
- Link to v2:
https://lore.kernel.org/lkml/20250424-drm-bridge-convert-to-alloc-api-v2-0-8f91a404d...@bootlin.com/
Changes in v2:
- Improved cover letter with link to commit adding devm_drm_bridge_alloc()
- add review tags
- fix bugs in zynqmp, vc4 patches
- fix patch 1 error code checking
- Link to v1:
https://lore.kernel.org/r/20250407-drm-bridge-convert-to-alloc-api-v1-0-42113ff8d...@bootlin.com
---
Luca Ceresoli (22):
Revert "drm/exynos: mic: convert to devm_drm_bridge_alloc() API"
drm: convert many bridge drivers from devm_kzalloc() to
devm_drm_bridge_alloc() API
drm/bridge: anx7625: convert to devm_drm_bridge_alloc() API
drm/bridge: cdns-dsi: convert to devm_drm_bridge_alloc() API
drm/bridge: megachips-stdpxxxx-ge-b850v3-fw: convert to
devm_drm_bridge_alloc() API
drm/bridge: nxp-ptn3460: convert to devm_drm_bridge_alloc() API
drm/bridge: sii902x: convert to devm_drm_bridge_alloc() API
drm/omap: dss: dpi: convert to devm_drm_bridge_alloc() API
drm/omap: dss: dsi: convert to devm_drm_bridge_alloc() API
drm/omap: dss: hdmi4: convert to devm_drm_bridge_alloc() API
drm/omap: dss: hdmi5: convert to devm_drm_bridge_alloc() API
drm/omap: dss: sdi: convert to devm_drm_bridge_alloc() API
drm/omap: dss: venc: convert to devm_drm_bridge_alloc() API
drm/rcar-du: dsi: convert to devm_drm_bridge_alloc() API
drm/bridge: stm_lvds: convert to devm_drm_bridge_alloc() API
drm/sti: dvo: convert to devm_drm_bridge_alloc() API
drm: zynqmp_dp: convert to devm_drm_bridge_alloc() API
drm/bridge: imx8qxp-pixel-combiner: convert to devm_drm_bridge_alloc() API
drm/bridge: tc358767: convert to devm_drm_bridge_alloc() API
drm/bridge: add devm_drm_put_bridge()
drm/bridge: panel: convert to devm_drm_bridge_alloc() API
drm/todo: add entry to remove devm_drm_put_bridge()
Documentation/gpu/todo.rst | 15 ++++++
drivers/gpu/drm/adp/adp-mipi.c | 8 ++--
drivers/gpu/drm/bridge/adv7511/adv7511_drv.c | 8 ++--
drivers/gpu/drm/bridge/analogix/analogix-anx78xx.c | 9 ++--
drivers/gpu/drm/bridge/analogix/anx7625.c | 7 ++-
drivers/gpu/drm/bridge/aux-bridge.c | 8 ++--
drivers/gpu/drm/bridge/aux-hpd-bridge.c | 9 ++--
drivers/gpu/drm/bridge/cadence/cdns-dsi-core.c | 8 ++--
.../gpu/drm/bridge/cadence/cdns-mhdp8546-core.c | 8 ++--
drivers/gpu/drm/bridge/chipone-icn6211.c | 8 ++--
drivers/gpu/drm/bridge/chrontel-ch7033.c | 8 ++--
drivers/gpu/drm/bridge/cros-ec-anx7688.c | 8 ++--
drivers/gpu/drm/bridge/fsl-ldb.c | 7 ++-
drivers/gpu/drm/bridge/imx/imx-legacy-bridge.c | 8 ++--
drivers/gpu/drm/bridge/imx/imx8mp-hdmi-pvi.c | 8 ++--
.../gpu/drm/bridge/imx/imx8qxp-pixel-combiner.c | 27 ++++++-----
drivers/gpu/drm/bridge/imx/imx8qxp-pixel-link.c | 8 ++--
drivers/gpu/drm/bridge/imx/imx8qxp-pxl2dpi.c | 8 ++--
drivers/gpu/drm/bridge/ite-it6263.c | 8 ++--
drivers/gpu/drm/bridge/ite-it6505.c | 8 ++--
drivers/gpu/drm/bridge/ite-it66121.c | 8 ++--
drivers/gpu/drm/bridge/lontium-lt8912b.c | 8 ++--
drivers/gpu/drm/bridge/lontium-lt9211.c | 7 ++-
drivers/gpu/drm/bridge/lontium-lt9611.c | 8 ++--
drivers/gpu/drm/bridge/lvds-codec.c | 9 ++--
.../drm/bridge/megachips-stdpxxxx-ge-b850v3-fw.c | 11 ++---
drivers/gpu/drm/bridge/microchip-lvds.c | 8 ++--
drivers/gpu/drm/bridge/nwl-dsi.c | 8 ++--
drivers/gpu/drm/bridge/nxp-ptn3460.c | 9 ++--
drivers/gpu/drm/bridge/panel.c | 12 ++---
drivers/gpu/drm/bridge/parade-ps8622.c | 8 ++--
drivers/gpu/drm/bridge/parade-ps8640.c | 8 ++--
drivers/gpu/drm/bridge/sii902x.c | 7 ++-
drivers/gpu/drm/bridge/sii9234.c | 8 ++--
drivers/gpu/drm/bridge/sil-sii8620.c | 8 ++--
drivers/gpu/drm/bridge/simple-bridge.c | 8 ++--
drivers/gpu/drm/bridge/synopsys/dw-hdmi-qp.c | 8 ++--
drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c | 8 ++--
drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi2.c | 8 ++--
drivers/gpu/drm/bridge/tc358762.c | 8 ++--
drivers/gpu/drm/bridge/tc358764.c | 8 ++--
drivers/gpu/drm/bridge/tc358767.c | 56 +++++++++++++++-------
drivers/gpu/drm/bridge/tc358768.c | 8 ++--
drivers/gpu/drm/bridge/tc358775.c | 8 ++--
drivers/gpu/drm/bridge/thc63lvd1024.c | 8 ++--
drivers/gpu/drm/bridge/ti-dlpc3433.c | 8 ++--
drivers/gpu/drm/bridge/ti-tdp158.c | 8 ++--
drivers/gpu/drm/bridge/ti-tfp410.c | 8 ++--
drivers/gpu/drm/bridge/ti-tpd12s015.c | 8 ++--
drivers/gpu/drm/drm_bridge.c | 17 +++++++
drivers/gpu/drm/exynos/exynos_drm_mic.c | 7 +--
drivers/gpu/drm/mediatek/mtk_dp.c | 8 ++--
drivers/gpu/drm/mediatek/mtk_dpi.c | 8 ++--
drivers/gpu/drm/mediatek/mtk_dsi.c | 8 ++--
drivers/gpu/drm/mediatek/mtk_hdmi.c | 8 ++--
drivers/gpu/drm/meson/meson_encoder_cvbs.c | 10 ++--
drivers/gpu/drm/meson/meson_encoder_dsi.c | 10 ++--
drivers/gpu/drm/meson/meson_encoder_hdmi.c | 10 ++--
drivers/gpu/drm/omapdrm/dss/dpi.c | 7 ++-
drivers/gpu/drm/omapdrm/dss/dsi.c | 7 ++-
drivers/gpu/drm/omapdrm/dss/hdmi4.c | 26 ++++------
drivers/gpu/drm/omapdrm/dss/hdmi5.c | 26 ++++------
drivers/gpu/drm/omapdrm/dss/sdi.c | 25 ++++------
drivers/gpu/drm/omapdrm/dss/venc.c | 23 ++++-----
drivers/gpu/drm/renesas/rcar-du/rcar_lvds.c | 8 ++--
drivers/gpu/drm/renesas/rcar-du/rcar_mipi_dsi.c | 8 ++--
drivers/gpu/drm/renesas/rz-du/rzg2l_mipi_dsi.c | 8 ++--
drivers/gpu/drm/sti/sti_dvo.c | 29 +++++------
drivers/gpu/drm/stm/lvds.c | 7 ++-
drivers/gpu/drm/xlnx/zynqmp_dp.c | 31 +++++-------
drivers/gpu/drm/xlnx/zynqmp_dpsub.c | 1 -
include/drm/drm_bridge.h | 4 ++
72 files changed, 390 insertions(+), 379 deletions(-)
---
base-commit: 94c60d3c1079fc044e356a78ffc68ca7b0603039
change-id: 20250404-drm-bridge-convert-to-alloc-api-614becf62294
Best regards,
--
Luca Ceresoli <luca.ceres...@bootlin.com>
