Messages in this thread | | | Date | Sat, 1 Aug 2009 07:17:16 +0200 | From | Tobias Diedrich <> | Subject | Re: QUIRK_FORCE_HISPD (was: Re: Ricoh R5C822 and QUIRK_FORCE_DMA) |
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Pierre Ossman wrote: > > On a related note, I had a little time to play a bit more with my > > R5C822 and found that I can also force-enable HISPD mode, which > > boost performance further. > > > > This seems odd. What frequency is the controller reporting? > > It could be that they originally wanted the controller to be > high-speed, but that they had stability problems and turned it off. > There is at least one other controller that went through that scenario.
I assume thats host->max_clk? The controller seems to report 33MHz for that value.
[130484.232213] mmc0: Controller vendor_ver=02 sdhci_ver=00. [130484.232213] mmc0: Controller caps=018021a1. [130484.232213] SDHCI_INT_ENABLE: Can toggle bits e1ff01ff [130484.232213] SDHCI_HOST_CONTROL: Can toggle bits 06 [130484.232213] DMA forced on (host quirk) [130484.232213] sdhci-pci 0000:04:00.1: Will use DMA mode even though HW doesn't fully claim to support it. [130484.232213] host->max_clk: 33000000 [130484.232213] HISPD forced on (host quirk) [130484.232213] Verified that HOST_CONTROL bit SDHCI_CTRL_HISPD can be toggled [130484.232213] Could not set SDHCI_CTRL_LED to 1!
-- Tobias PGP: http://9ac7e0bc.uguu.de
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