[PATCH v4 0/6] clk/qcom: Support gdsc collapse polling using 'reset' interface

From: Akhil P Oommen
Date: Fri Aug 19 2022 - 13:22:49 EST



Some clients like adreno gpu driver would like to ensure that its gdsc
is collapsed at hardware during a gpu reset sequence. This is because it
has a votable gdsc which could be ON due to a vote from another subsystem
like tz, hyp etc or due to an internal hardware signal. To allow
this, gpucc driver can expose an interface to the client driver using
reset framework. Using this the client driver can trigger a polling within
the gdsc driver.

This series is rebased on top of linus's master branch.

Related discussion: https://patchwork.freedesktop.org/patch/493144/

Changes in v4:
- Update gpu dt-binding schema
- Typo fix in commit text

Changes in v3:
- Use pointer to const for "struct qcom_reset_ops" in qcom_reset_map (Krzysztof)

Changes in v2:
- Return error when a particular custom reset op is not implemented. (Dmitry)

Akhil P Oommen (6):
dt-bindings: clk: qcom: Support gpu cx gdsc reset
clk: qcom: Allow custom reset ops
clk: qcom: gdsc: Add a reset op to poll gdsc collapse
clk: qcom: gpucc-sc7280: Add cx collapse reset support
dt-bindings: drm/msm/gpu: Add optional resets
arm64: dts: qcom: sc7280: Add Reset support for gpu

.../devicetree/bindings/display/msm/gpu.yaml | 7 ++++++
arch/arm64/boot/dts/qcom/sc7280.dtsi | 3 +++
drivers/clk/qcom/gdsc.c | 23 ++++++++++++++----
drivers/clk/qcom/gdsc.h | 7 ++++++
drivers/clk/qcom/gpucc-sc7280.c | 10 ++++++++
drivers/clk/qcom/reset.c | 27 ++++++++++++++++++++++
drivers/clk/qcom/reset.h | 8 +++++++
include/dt-bindings/clock/qcom,gpucc-sc7280.h | 3 +++
8 files changed, 84 insertions(+), 4 deletions(-)

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2.7.4