[PATCH v5 0/7] media: iris: migrate to using global UBWC config

[Dmitry Baryshkov]

Having UBWC configuration in the driver is error prone. For example, the
driver specifies fixed values for HBB, while the actual value might
depend on the DDR type. Stop defining UBWC data in the iris driver and
use the global UBWC configuration registry.

Merge strategy: either merge SoC bits directly through the media tree
(with Bjorn's ack) or merge to the media tree through the immutable tag.
The drm patches will follow depending on the way the SoC patches are
merged.

Note: the patches are compile-tested only because of the lack of the
Gen2 hardware at hand.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxxxxxxxx>
---
Changes in v5:
- Rebased on next/master, dropping applied patches
- Link to v4: https://lore.kernel.org/r/20260125-iris-ubwc-v4-0-1ff30644ac81@xxxxxxxxxxxxxxxx

Changes in v4:
- Rebased on next/master, fixing the conflicts.
- Link to v3: https://lore.kernel.org/r/20260116-iris-ubwc-v3-0-662ac0e0761f@xxxxxxxxxxxxxxxx

Changes in v3:
- Dropped applied and unrelated patches (they will be posted separately)
- Include printk.h, decoupling the series from fix picked up by Bjorn
- Introduced additional helpers to retrieve the data.
- Link to v2: https://lore.kernel.org/r/20260113-iris-ubwc-v2-0-4346a6ef07a9@xxxxxxxxxxxxxxxx

Changes in v2:
- Extended the commit message and added a comment for the min_acc length
  helper (Konrad)
- Link to v1: https://lore.kernel.org/r/20260110-iris-ubwc-v1-0-dd70494dcd7b@xxxxxxxxxxxxxxxx

---
Dmitry Baryshkov (7):
      media: iris: retrieve UBWC platform configuration
      media: iris: don't specify min_acc_length in the source code
      media: iris: don't specify highest_bank_bit in the source code
      media: iris: don't specify ubwc_swizzle in the source code
      media: iris: don't specify bank_spreading in the source code
      media: iris: don't specify max_channels in the source code
      media: iris: drop remnants of UBWC configuration

 drivers/media/platform/qcom/iris/Kconfig               |  1 +
 drivers/media/platform/qcom/iris/iris_core.h           |  4 ++++
 .../media/platform/qcom/iris/iris_hfi_gen2_packet.c    | 18 +++++++++++-------
 .../media/platform/qcom/iris/iris_platform_common.h    | 11 -----------
 drivers/media/platform/qcom/iris/iris_platform_gen2.c  | 14 --------------
 drivers/media/platform/qcom/iris/iris_probe.c          |  5 +++++
 6 files changed, 21 insertions(+), 32 deletions(-)
---
base-commit: bee6ea30c48788e18348309f891ed8afbf7702ac
change-id: 20260110-iris-ubwc-06f64cbb31ae

Best regards,
--  
With best wishes
Dmitry