On 23/03/16 18:28, Justin Maggard wrote:
On Wed, Mar 23, 2016 at 9:36 AM, Srinivas Kandagatla
<srinivas.kandagatla@xxxxxxxxxx> wrote:
Hi Tejun,
Its bit late but just found that commit 566d18 "libata: disable forced
PORTS_IMPL for >= AHCI 1.3" is breaking AHCI on Qualcomm APQ8064 platforms
in the mainline kernel (arch/arm/boot/dts/qcom-apq8064.dtsi).
This platform uses "generic-ahci" platform driver and reports AHCI version
as 0x10300, and PORTS_IMPL is never set, so the existing workaround was
correct for this platform, however the latest patch broken this.
There are few ways to fix this issue,
1> Add new compatible string to achi_platform driver so that this platform
can force the port_map,
Or
2> Have a generic dt binding to force the port map.
A generic dt binding is probably a better way forward. The Annapurna
Alpine platform seems to have the same issue.
+1 for generic bindings.
I suspected that other platforms would also hit the same issue.
--srini
-Justin
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