** Description changed: Impact: - During boot on a Dragonboard410c using a recent Bionic or Cosmic kernel: + During boot on a Dragonboard410c using a recent Bionic or Cosmic kernel, + there's some noise like: ... [ 3.665431] msm_dsi_phy 1a98300.dsi-phy: Failed to get supply 'vddio': -517 [ 3.669243] msm_dsi_phy 1a98300.dsi-phy: dsi_phy_regulator_init: failed to init regulator, ret=-517 [ 3.676180] msm_dsi_phy 1a98300.dsi-phy: dsi_phy_driver_probe: failed to init regulator ... or ... [ 4.192280] qcom,pm8916-wcd-spmi-codec 200f000.spmi:pm8916@1:codec@f000: Failed to get supply 'vdd-cdc-io': -517 [ 4.195660] qcom,pm8916-wcd-spmi-codec 200f000.spmi:pm8916@1:codec@f000: Failed to get regulator supplies -517 ... - this is mainly because the DRM_MSM* and the SND_QCOM_MSM* were built-in, - and tries to initialize before the voltage regulators are ready, - spamming the boot log with useless noise. + and similar. + + This is mainly due to DRM_MSM* and SND_QCOM_MSM* that were built-in, and + tries to initialize before the voltage regulators are ready to work, + resulting in a noisy bootlog. These patches factor out some code as modules, so when the kmods are loaded and initialized, regulators are already present and ready to attach - all these config changes shave around ~3K bytes from dmesg, - making the bootlog more clear. + making the bootlog easir to parse. Fix: Apply the attached patches and recompile How to test: Boot a patched kernel and check for the above noise in dmesg Regression potential: None, we are just turning some code into kmods, and turning off a couple - of not used feature for this flavour. + of not used feature for this flavour - all the other flavours are + untouched.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1797154 Title: arm64: snapdragon: reduce boot noise To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1797154/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
