[SRU] [Bionic] [PATCH 0/1] Add missing firmware info for Intel GLK

Kai-Heng Feng kai.heng.feng at canonical.com
Mon Oct 8 05:35:57 UTC 2018

BugLink: https://bugs.launchpad.net/bugs/1760545

i915 lacks information about the glk_dmc_ver1_04.bin firmware file in
modinfo, so it is not included in the initrd along with the i915 driver.
Thus the firmware does not get loaded. Loading the firmware is said to
prevent a hang.

In addition to that, this also causes GLK's HDMI audio codec stops
working after S3.

Add a MODULE_FIRMWARE statement for the firmware.

This information is required to let initramfs-tools includes the

[Test Case]
Without the firmware there will be a "Direct firmware load for
i915/glk_dmc_ver1_04.bin failed with error -2" line in dmesg. With the
firmware there is no such message.

I can confirm the GLK HDMI audio issue is gone when firmware is loaded.

[Regression Potential]
Minimal. Will only be loaded by i915 for specific hardware, and loading
the firmware is known to fix a hang.

  drm/i915/glk: Add MODULE_FIRMWARE for Geminilake

 drivers/gpu/drm/i915/intel_csr.c | 1 +
 1 file changed, 1 insertion(+)


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