Re: [PATCH 0/2] mmc: sdhci-pci-gli: GL9755: Quirks for Apple ARM platforms

[Hector Martin]

Argh, forgot to Cc Ben...

Ben, please let me know what you think about this series. I can resend 
it CCing you if you want, or you can also find it here:

https://lore.kernel.org/all/20211207064019.61444-1-marcan@xxxxxxxxx/

Sorry for missing the Cc...

-Hector

On 07/12/2021 15.40, Hector Martin wrote:
> Hi folks,
>
> This short series adds a few quirks needed to make the card readers in
> Apple M1 Pro/Max MacBook laptops work properly.
>
> The first patch should be straightforward; it just allows configuring
> the CD/WP polarity based on device tree settings. There is already a
> standard DT binding for this.
>
> The second patch bugs me. I don't understand why this problem happens
> on these machines, and not on e.g. x86 laptops (which presumably work
> with this driver). 8/16-bit MMIO reads work fine on other PCIe devices
> on these machines, so it is not a generalized problem with the PCIe
> controller in these SoCs. The problem also happens when running macOS
> (it also uses 32-bit reads). Ben, is there any chance you might know
> of some vendor-specific knob somewhere that can fix this issue without
> requiring the MMIO read workaround? Interestingly, 8/16-bit writes
> work perfectly fine.
>
> Hector Martin (2):
>    mmc: sdhci-pci-gli: GL9755: Support for CD/WP inversion on OF
>      platforms
>    mmc: sdhci-pci-gli: GL9755: Issue 8/16-bit MMIO reads as 32-bit reads.
>
>   drivers/mmc/host/sdhci-pci-gli.c | 38 ++++++++++++++++++++++++++++++--
>   1 file changed, 36 insertions(+), 2 deletions(-)

--
Hector Martin (marcan@xxxxxxxxx)
Public Key: https://mrcn.st/pub