linux-kernel - [RFC PATCH v2 0/4] arm64: dts: qcom: sm8150: display support for Microsoft Surface Duo

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Date:   Tue, 16 Nov 2021 17:35:12 -0800
From:   Katherine Perez <kaperez@...ux.microsoft.com>
To:     Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Rob Herring <robh+dt@...nel.org>, Vinod Koul <vkoul@...nel.org>
Cc:     linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [RFC PATCH v2 0/4] arm64: dts: qcom: sm8150: display support for Microsoft Surface Duo

Hi Bjorn and Vinod,

I'm trying to enable the display subsystem on SM8150 but am having
trouble enabling the DISP_CC_MDSS_AHB_CLK. Trace shows "disp_cc_mdss_ahb_clk
status stuck at off". Do you have any pointers on enabling this clock?

msm_dsi_phy ae94400.dsi-phy: [drm:dsi_phy_driver_probe [msm]] *ERROR* dsi_phy_driver_probe: Unable to get ahb clk
disp_cc-sm8250 af00000.clock-controller: supply mmcx not found, using dummy regulator
platform ae96000.dsi: Fixing up cyclic dependency with ae00000.mdss:mdp@...10000
------------[ cut here ]------------
disp_cc_mdss_ahb_clk status stuck at 'off'
WARNING: CPU: 6 PID: 76 at drivers/clk/qcom/clk-branch.c:91 clk_branch_wait+0x14c/0x164
CPU: 6 PID: 76 Comm: kworker/u16:2 Not tainted 5.15.0 #17
Hardware name: Microsoft Surface Duo (DT)
Workqueue: events_unbound deferred_probe_work_func
pstate: 604000c5 (nZCv daIF +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : clk_branch_wait+0x14c/0x164
lr : clk_branch_wait+0x14c/0x164
sp : ffff80001078ba40
x29: ffff80001078ba40 x28: 0000000000000000 x27: ffff65e6008e2100
x26: ffffb8630ec8e278 x25: ffff65e60005e005 x24: ffffb8630ebc0f98
x23: ffffb8630e234dd8 x22: 0000000000000001 x21: ffffb8630d5b8b60
x20: 0000000000000000 x19: ffffb8630eb5e7b8 x18: 0000000000000030
x17: 2e726f74616c7567 x16: ffffb8630d5a3800 x15: ffffffffffffffff
x14: 0000000000000000 x13: 6f27207461206b63 x12: 7574732073757461
x11: 77705f313439386d x10: 0000000000000027 x9 : ffffb8630cf974bc
x8 : 0000000000000027 x7 : 0000000000000002 x6 : 0000000000000027
x5 : ffff65e6f93cc9a8 x4 : ffff80001078b890 x3 : 0000000000000001
x2 : 0000000000000000 x1 : 0000000000000000 x0 : ffff65e600851d80
Call trace:
 clk_branch_wait+0x14c/0x164
 clk_branch2_enable+0x3c/0x60
 clk_core_enable+0x78/0x220
 clk_enable+0x38/0x60
 dsi_phy_enable_resource+0x98/0xac [msm]
 dsi_phy_driver_probe+0x29c/0x4f8 [msm]
 platform_probe+0x74/0xe4
 really_probe.part.0+0xa4/0x328
 __driver_probe_device+0xa0/0x150
 driver_probe_device+0x4c/0x164
 __device_attach_driver+0xc0/0x128
 bus_for_each_drv+0x84/0xe0
 __device_attach+0xe0/0x188
 device_initial_probe+0x20/0x2c
 bus_probe_device+0xa8/0xbc
 deferred_probe_work_func+0x90/0xc8
 process_one_work+0x1f4/0x43c
 worker_thread+0x78/0x4f0
 kthread+0x154/0x160
 ret_from_fork+0x10/0x20
---[ end trace 734ed75908fc6b0e ]---

Katherine Perez (4):
  arm64: dts: qcom: sm8150: add dispcc node
  arm64: dts: qcom: sm8150: add display nodes
  arm64: dts: qcom: sm8150: add DSI display nodes
  arm64: dts: qcom: sm8150: display support for Microsoft Surface Duo

 .../dts/qcom/sm8150-microsoft-surface-duo.dts |  26 ++
 arch/arm64/boot/dts/qcom/sm8150.dtsi          | 292 ++++++++++++++++++
 2 files changed, 318 insertions(+)

--
2.31.1