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* [PATCH 0/2] mmc: sdhci-acpi: Introduce device specific quirks, fix issues on 2 device models
@ 2020-01-08  9:39 Hans de Goede
  2020-01-08  9:39 ` [PATCH 1/2] mmc: sdhci-acpi: Disable 1.8V modes on external microSD on Lenovo Miix 320 Hans de Goede
                   ` (2 more replies)
  0 siblings, 3 replies; 24+ messages in thread
From: Hans de Goede @ 2020-01-08  9:39 UTC (permalink / raw)
  To: Adrian Hunter, Ulf Hansson
  Cc: Hans de Goede, russianneuromancer @ ya . ru, linux-mmc

Hi Adrian,

I know you have sofar mostly resisted adding device specific (DMI based)
quirks to the sdhci-acpi.c driver and I agree with you that whenever
possible, those should be avoided.

But yesterday I was debugging an issue where using the microSD slot
causes the LCD panel of a tablet to go black. This turns out to be a
bug in the DSDT which gets triggered when using 1.8V modes, see the first
patch for details. In this case I really so no other option then disabling
1.8V modes and only doing so only on the affected device model.

Another issue which I had on my TODO list of things to fix is the Acer
SW5-012 version of the Acer Switch 10 models always reporting the microSD
as being write-protected. Here too I see no other option then a model
specific quirk, since some BYT devices may use a normal SD slot with
actual write-protect capabilities and we do not want to disable
write-protect checking everywhere just because it is broken on one model.
The workaround for this is the second patch in this series.

Regards,

Hans


^ permalink raw reply	[flat|nested] 24+ messages in thread

end of thread, other threads:[~2020-03-06 14:10 UTC | newest]

Thread overview: 24+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2020-01-08  9:39 [PATCH 0/2] mmc: sdhci-acpi: Introduce device specific quirks, fix issues on 2 device models Hans de Goede
2020-01-08  9:39 ` [PATCH 1/2] mmc: sdhci-acpi: Disable 1.8V modes on external microSD on Lenovo Miix 320 Hans de Goede
2020-01-15 12:57   ` Adrian Hunter
2020-01-15 13:31     ` Hans de Goede
2020-01-15 13:48       ` Adrian Hunter
2020-01-15 15:31         ` Hans de Goede
2020-01-16  7:59           ` Adrian Hunter
2020-01-16 11:05             ` [FSL P5020 P5040 PPC] Onboard SD card doesn't work anymore after the 'mmc-v5.4-2' updates Christian Zigotzky
2020-01-16 15:46               ` Ulf Hansson
2020-01-20  9:17                 ` Christian Zigotzky
2020-01-20 11:18                   ` Ulf Hansson
2020-01-24 11:42                 ` Michael Ellerman
2020-01-25 13:26                   ` Christian Zigotzky
2020-01-28 11:55                     ` Michael Ellerman
2020-01-28  7:58                   ` [PASEMI PA6T PPC] Onboard CF card device with new SanDisk High (>8G) CF cards Christian Zigotzky
2020-01-28  8:08                     ` Christoph Hellwig
2020-01-28 14:16                     ` Rob Herring
2020-01-28 14:48                       ` Christian Zigotzky
2020-01-16 13:26             ` [PATCH 1/2] mmc: sdhci-acpi: Disable 1.8V modes on external microSD on Lenovo Miix 320 Hans de Goede
2020-01-17  9:16               ` Adrian Hunter
2020-03-06 14:07                 ` Hans de Goede
2020-03-06 14:10         ` Hans de Goede
2020-01-08  9:39 ` [PATCH 2/2] mmc: sdhci-acpi: Disable write protect detection on Acer Aspire Switch 10 (SW5-012) Hans de Goede
2020-01-15 12:51 ` [PATCH 0/2] mmc: sdhci-acpi: Introduce device specific quirks, fix issues on 2 device models Adrian Hunter

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