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Add eDP display overlays for hamoa and purwa IoT EVKs - #1706

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qualcomm-linux:tech/all/dt/hamoafrom
anan-tiwa:edp_overlay_hamoa
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anan-tiwa wants to merge 5 commits into
qualcomm-linux:tech/all/dt/hamoafrom
anan-tiwa:edp_overlay_hamoa

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Both Hamoa and Purwa IoT EVKs are available in headed and headless
variants. The headed variants use an eDP display panel connected via
the DP3 controller, while the headless variants do not include a
display.

The existing DT is causing the eDP-panel driver to probe an unavailable
panel, resulting in AUX probe timeouts and missing display modes.
Userspace then attempts display commits through the eDP connector,
causing repeated DPU vblank, frame-done, and IRQ timeout errors.

Move the eDP-specific nodes out of the base DTS files into separate
DTBO overlays for each board. This allows the base DTBs to be used
as-is for headless variants, while the composite DTBs enable eDP
support on headed variants.

CRs-Fixed: 4543794, 4543797

@qcomlnxci
qcomlnxci requested review from a team, aiquny, Amit Kucheria (idlethread) and Kaushal Kumar (quic-kaushalk) and removed request for a team August 18, 2026 14:25
@qcomlnxci
qcomlnxci requested a review from a team August 26, 2026 10:06
LXQUALCOMM and others added 5 commits September 25, 2026 16:39
Add support for SYSTEM_RESET2 vendor-specific resets as
reboot-modes in the psci node.  Describe the resets: "bootloader"
will cause device to reboot and stop in the bootloader's fastboot
mode.  "edl" will cause device to reboot into "emergency download
mode", which permits loading images via the Firehose protocol.

Signed-off-by: Xin Liu <xin.liu@oss.qualcomm.com>
Link: https://lore.kernel.org/all/20260226054113.4156874-1-xin.liu@oss.qualcomm.com/
On Qualcomm Hamoa SoCs, the memlat governor and the mechanism
to control the LLCC and DDR/DDR_QOS is hosted on the CPU Control
Processor (CPUCP). Add the vendor protocol node to the existing
SCMI transport to enable QCOM SCMI Generic Extension protocol on
Hamoa SoCs.

Link: https://lore.kernel.org/lkml/20260507062237.78051-9-sibi.sankar@oss.qualcomm.com/
Signed-off-by: Sibi Sankar <sibi.sankar@oss.qualcomm.com>
Add Battery Current Limiting (BCL) hardware monitor node for pm8550
PMIC. The BCL monitors battery voltage and current, providing hardware
interrupts when configurable thresholds are violated.

Signed-off-by: Manaf Meethalavalappu Pallikunhi <manaf.pallikunhi@oss.qualcomm.com>
Link: https://lore.kernel.org/r/20260722-qcom-bcl-hwmon-v2-7-febe2805e17b@oss.qualcomm.com
Hamoa IoT EVKs are available with and without an eDP panel. When the
panel is absent, DP3 is unused, but the base DTS still describes the
eDP panel and display path.

This causes the eDP driver to probe an unavailable panel, resulting in
AUX probe timeouts and missing display modes. Userspace then attempts
display commits through the eDP connector, causing repeated DPU vblank,
frame-done, and IRQ timeout errors.

Move the eDP-specific nodes into an overlay so the base DTB describes
the configuration without the panel, while the overlay enables eDP for
boards with the panel connected.

DT overlays cannot remove properties from a node defined in the base
DTB, so the /delete-property/ of #sound-dai-cells is moved into the
base DTS instead of the overlay, where it takes effect.

Link: https://lore.kernel.org/all/20260818-edp_overlay_for-next-v2-1-bd811d378fb7@oss.qualcomm.com/

Signed-off-by: Anand Tiwari <anand.tiwari@oss.qualcomm.com>
Purwa IoT EVKs are available with and without an eDP panel. When the
panel is absent, DP3 is unused, but the base DTS still describes the
eDP panel and display path.

This causes the eDP driver to probe an unavailable panel, resulting in
AUX probe timeouts and missing display modes. Userspace then attempts
display commits through the eDP connector, causing repeated DPU vblank,
frame-done, and IRQ timeout errors.

Move the eDP-specific nodes into an overlay so the base DTB describes
the configuration without the panel, while the overlay enables eDP for
boards with the panel connected.

DT overlays cannot remove properties from a node defined in the base
DTB, so the /delete-property/ of #sound-dai-cells is moved into the
base DTS instead of the overlay, where it takes effect.

Link: https://lore.kernel.org/all/20260818-edp_overlay_for-next-v2-2-bd811d378fb7@oss.qualcomm.com/

Signed-off-by: Anand Tiwari <anand.tiwari@oss.qualcomm.com>
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4 participants