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 v5: - Nit: Remove a duplicate blank line (Krzysztof) 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 | 6 +++++ 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, 83 insertions(+), 4 deletions(-) -- 2.7.4
