linux-kernel - [PATCH 0/3] drm/msm: use firmware-name to find zap fw

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Date:   Tue,  7 Jan 2020 17:38:41 -0800
From:   Rob Clark <robdclark@...il.com>
To:     dri-devel@...ts.freedesktop.org
Cc:     devicetree@...r.kernel.org, freedreno@...ts.freedesktop.org,
        linux-arm-msm@...r.kernel.org,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Jordan Crouse <jcrouse@...eaurora.org>,
        Sharat Masetty <smasetty@...eaurora.org>,
        Rob Clark <robdclark@...omium.org>,
        Brian Masney <masneyb@...tation.org>,
        Douglas Anderson <dianders@...omium.org>,
        Fabio Estevam <festevam@...il.com>,
        Jeffrey Hugo <jeffrey.l.hugo@...il.com>,
        linux-kernel@...r.kernel.org (open list),
        Thomas Gleixner <tglx@...utronix.de>
Subject: [PATCH 0/3] drm/msm: use firmware-name to find zap fw

From: Rob Clark <robdclark@...omium.org>

For devices which use zap fw to take the GPU out of secure mode on
reset, the firmware is likely to be signed with a device specific key.
Meaning that we can't have a single filesystem (or /lib/firmware) that
works on multiple devices.

So allow a firmware-name to be specified in the zap-shader node in dt.
This moves the zap-shader node out of the core sdm845.dtsi and into per-
device dts files.  Which also removes the need for /delete-node/ in
sdm845-cheza.dtsi (as cheza devices do not use zap).

This aligns with how Bjorn has been handling the similar situation with
adsp/cdsp/mpss fw:

   https://patchwork.kernel.org/patch/11160089/

Rob Clark (3):
  drm/msm: support firmware-name for zap fw
  dt-bindings: drm/msm/gpu: Document firmware-name
  arm64: dts: sdm845: move gpu zap nodes to per-device dts

 .../devicetree/bindings/display/msm/gpu.txt   |  3 ++
 arch/arm64/boot/dts/qcom/sdm845-cheza.dtsi    |  1 -
 arch/arm64/boot/dts/qcom/sdm845-db845c.dts    |  7 ++++
 arch/arm64/boot/dts/qcom/sdm845-mtp.dts       |  8 +++++
 arch/arm64/boot/dts/qcom/sdm845.dtsi          |  6 +---
 .../boot/dts/qcom/sdm850-lenovo-yoga-c630.dts |  7 ++++
 drivers/gpu/drm/msm/adreno/adreno_gpu.c       | 32 +++++++++++++++++--
 7 files changed, 55 insertions(+), 9 deletions(-)

-- 
2.24.1