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Dss ds docs#732

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akashdeep-ti wants to merge 3 commits into
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akashdeep-ti:dss_ds_docs
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Dss ds docs#732
akashdeep-ti wants to merge 3 commits into
TexasInstruments:masterfrom
akashdeep-ti:dss_ds_docs

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@akashdeep-ti

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github-actions Bot commented Jul 3, 2026

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New warnings found with rstcheck:

source/linux/Foundational_Components/Power_Management/pm_am62lx_low_power_modes.rst:177: (WARNING/2) Title underline too short.
source/linux/Foundational_Components/Power_Management/pm_am62lx_low_power_modes.rst:223: (WARNING/2) Title underline too short.
source/linux/Foundational_Components/Power_Management/pm_am62lx_low_power_modes.rst:311: (WARNING/2) Title underline too short.
source/linux/Foundational_Components/Power_Management/pm_am62lx_low_power_modes.rst:335: (ERROR/3) Malformed table.

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Vale comments about passive voice and such

Add DSS plus Deep Sleep low power mode, a new suspend mode where the
Display Subsystem remains powered to show a static image while the
rest of the system enters Deep Sleep.

Signed-off-by: Akashdeep Kaur <a-kaur@ti.com>
Add power consumption data for DSS plus Deep Sleep mode. This mode
consumes more power than standard Deep Sleep (14.07 mW) due to the
active display subsystem with FIFO replay.

Signed-off-by: Akashdeep Kaur <a-kaur@ti.com>
Add DSS plus Deep Sleep mode to Key Release References section,
highlighting the new display subsystem self-refresh capability that
allows showing static images during system suspend.

Signed-off-by: Akashdeep Kaur <a-kaur@ti.com>
@akashdeep-ti

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Addressed code review feedback

@cshilwant cshilwant requested a review from StaticRocket July 10, 2026 19:20
DSS plus Deep Sleep
*******************

DSS plus Deep Sleep is a low-power mode where the Display Subsystem (DSS) is on to display

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Maybe "on" should be bolded or in uppercase to make sure the reader understands that it is being used to describe a state

on-chip memory (a small FIFO buffer) instead of continuously fetching from DDR. This
significantly reduces memory bandwidth and power consumption during suspend.

The AM62L-DSS has a 20 KB FIFO buffer. For the self-refresh feature to work, your static

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s/your/the

**Width × Height × 3 ≤ 20,480 bytes**

For example, a 50×50 RGB image requires 50 × 50 × 3 = 7,500 bytes, which fits comfortably
within the limit. If your frame is too large, self-refresh will not activate.

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s/your/the


.. code-block:: console

root@am62lxx-evm:~# systemctl stop emptty.service

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nit: I think you can just do systemctl stop emptty so its a little less to type :)

Comment on lines +219 to +220
Using both properties together enables DSS plus Deep Sleep mode: the display shows
a static frame from internal memory while the rest of the system suspends.

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nit: if you wanted to, you could remove these lines since the last sentence of the previous paragraph says the same thing

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