kernel/linux.git/include/linux/soc/qcom/ubwc.h, branch linux-7.1.y

soc: qcom: ubwc: add helpers to get programmable values

2026-03-30T17:44:58+00:00

Currently the database stores macrotile_mode in the data. However it can be derived from the rest of the data: it should be used for UBWC encoding >= 3.0 except for several corner cases (SM8150 and SC8180X). The ubwc_bank_spread field seems to be based on the impreside data we had for the MDSS and DPU programming. In some cases UBWC engine inside the display controller doesn't need to program it, although bank spread is to be enabled. Bank swizzle is also currently stored as is, but it is almost standard (banks 1-3 for UBWC 1.0 and 2-3 for other versions), the only exception being Lemans (it uses only bank 3). Add helpers returning values from the config for now. They will be rewritten later, in a separate series, but having the helper now simplifies refacroring the code later. Tested-by: Wangao Wang Signed-off-by: Dmitry Baryshkov Link: https://lore.kernel.org/r/20260125-iris-ubwc-v4-2-1ff30644ac81@oss.qualcomm.com Signed-off-by: Bjorn Andersson

soc: qcom: ubwc: add helper to get min_acc length

2026-03-30T17:44:58+00:00

MDSS and GPU drivers use different approaches to get min_acc length. Add helper function that can be used by all the drivers. The helper reflects our current best guess, it blindly copies the approach adopted by the MDSS drivers and it matches current values selected by the GPU driver. Reviewed-by: Bryan O'Donoghue Acked-by: Bjorn Andersson Reviewed-by: Konrad Dybcio Reviewed-by: Dikshita Agarwal Tested-by: Wangao Wang Signed-off-by: Dmitry Baryshkov Link: https://lore.kernel.org/r/20260125-iris-ubwc-v4-1-1ff30644ac81@oss.qualcomm.com Signed-off-by: Bjorn Andersson

soc: qcom: ubwc: add missing include

2026-01-14T22:22:13+00:00

The header has a function which calls pr_err(). Don't require users of the header to include and include it here. Fixes: 87cfc79dcd60 ("drm/msm/a6xx: Resolve the meaning of UBWC_MODE") Signed-off-by: Dmitry Baryshkov Reviewed-by: Bryan O'Donoghue Link: https://lore.kernel.org/r/20260110-iris-ubwc-v1-1-dd70494dcd7b@oss.qualcomm.com Signed-off-by: Bjorn Andersson

soc: qcom: ubwc: Add config for Kaanapali

2025-11-04T03:11:17+00:00

Add the ubwc configuration for Kaanapali chipset. This chipset brings support for UBWC v6 version. The rest of the configurations remains as usual. Signed-off-by: Akhil P Oommen Reviewed-by: Konrad Dybcio Reviewed-by: Dmitry Baryshkov Link: https://lore.kernel.org/r/20250930-kaana-gpu-support-v1-1-73530b0700ed@oss.qualcomm.com Signed-off-by: Bjorn Andersson

soc: qcom: ubwc: Add #defines for UBWC swizzle bits

2025-07-05T00:48:40+00:00

Make the values a bit more meaningful. This commit is intentionally cross-subsystem to ease review, as the patchset is intended to be merged together, with a maintainer consensus. Reviewed-by: Dmitry Baryshkov Signed-off-by: Konrad Dybcio Patchwork: https://patchwork.freedesktop.org/patch/660981/ Signed-off-by: Rob Clark

drm/msm/a6xx: Resolve the meaning of UBWC_MODE

2025-07-05T00:48:40+00:00

This bit is set iff the UBWC version is 1.0. That notably does not include QCM2290's "no UBWC". This commit is intentionally cross-subsystem to ease review, as the patchset is intended to be merged together, with a maintainer consensus. Reviewed-by: Dmitry Baryshkov Signed-off-by: Konrad Dybcio Patchwork: https://patchwork.freedesktop.org/patch/660971/ Signed-off-by: Rob Clark

drm/msm: Use the central UBWC config database

2025-07-05T00:48:39+00:00

As discussed a lot in the past, the UBWC config must be coherent across a number of IP blocks (currently display and GPU, but it also may/will concern camera/video as the drivers evolve). So far, we've been trying to keep the values reasonable in each of the two drivers separately, but it really make sense to do so centrally, especially given certain fields (e.g. HBB) may need to be gathered dynamically. To reduce room for error, move to fetching the config from a central source, so that the data programmed into the hardware is consistent across all multimedia blocks that request it. Reviewed-by: Dmitry Baryshkov Signed-off-by: Konrad Dybcio Patchwork: https://patchwork.freedesktop.org/patch/660963/ Signed-off-by: Rob Clark

soc: qcom: Add UBWC config provider

2025-07-05T00:48:39+00:00

Add a file that will serve as a single source of truth for UBWC configuration data for various multimedia blocks. Reviewed-by: Dmitry Baryshkov Signed-off-by: Konrad Dybcio Patchwork: https://patchwork.freedesktop.org/patch/660959/ Signed-off-by: Rob Clark