On 06/03/2025 08:55, Jagadeesh Kona wrote:
In some of the recent chipsets, PLLs require more than one power domain
to be kept ON to configure the PLL. But the current code doesn't enable
all the required power domains while configuring the PLLs, this leads
to functional issues due to suboptimal settings of PLLs.
To address this, add support for handling runtime power management,
configuring plls and enabling critical clocks from qcom_cc_really_probe.
The clock controller can specify PLLs, critical clocks, and runtime PM
requirements in the descriptor data. The code in qcom_cc_really_probe()
ensures all necessary power domains are enabled before configuring PLLs
or critical clocks.
This series updates SM8450 & SM8550 videocc drivers to handle rpm,
configure PLLs and enable critical clocks from within qcom_cc_really_probe()
using above support, so video PLLs are configured properly.
This series fixes the below warning reported in SM8550 venus testing due
to video_cc_pll0 not properly getting configured during videocc probe
[ 46.535132] Lucid PLL latch failed. Output may be unstable!
The patch adding support to configure the PLLs from common code is
picked from below series and updated it.
https://lore.kernel.org/all/20250113-support-pll-reconfigure-v1-0-1fae6bc1062d@xxxxxxxxxxx/
Signed-off-by: Jagadeesh Kona <quic_jkona@xxxxxxxxxxx>
---
Changes in v2:
- Added support to handle rpm, PLL configuration and enable critical
clocks from qcom_cc_really_probe() in common code as per v1 commments
from Bryan, Konrad and Dmitry
- Added patches to configure PLLs from common code
- Updated the SM8450, SM8550 videocc patches to use the newly
added support to handle rpm, configure PLLs from common code
- Split the DT change for each target separately as per
Dmitry comments
- Added R-By and A-By tags received on v1
- Link to v1: https://lore.kernel.org/r/20250218-videocc-pll-multi-pd-voting-v1-0-cfe6289ea29b@xxxxxxxxxxx
---
Jagadeesh Kona (7):
dt-bindings: clock: qcom,sm8450-videocc: Add MXC power domain
clk: qcom: common: Manage rpm, configure PLLs & AON clks in really probe
clk: qcom: videocc-sm8450: Move PLL & clk configuration to really probe
clk: qcom: videocc-sm8550: Move PLL & clk configuration to really probe
arm64: dts: qcom: Add MXC power domain to videocc node on SM8450
arm64: dts: qcom: Add MXC power domain to videocc node on SM8550
arm64: dts: qcom: Add MXC power domain to videocc node on SM8650
This list looks sparse.
- camcc is missing
- x1e is missing
- sm8650 and sm8750 and both also missing
If we are going in with the knife, lets cut once and make a
comprehensive change.
Could you please add those platforms and clock controllers to your V3 to
save other people having to do the extra work.
---
bod
