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mmc: rtsx_pci: add quirk to disable MMC_CAP_AGGRESSIVE_PM for RTS525A

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Using MMC_CAP_AGGRESSIVE_PM on RTS525A card readers causes game
performance issues when the card reader comes back from idle into active
use. This can be observed in Hades II when loading new sections of the
game or menu after the card reader puts itself into idle, and presents
as a 1-2 second hang.

Add EXTRA_CAPS_NO_AGGRESSIVE_PM quirk to allow cardreader drivers to
opt-out of aggressive PM, and set it for RTS525A.

Closes: https://lore.kernel.org/linux-mmc/ff9a7c20-f465-4afa-bf29-708d4a52974a@linux.dev/
Signed-off-by: Matthew Schwartz <matthew.schwartz@linux.dev>
Link: https://patch.msgid.link/20260103204226.71752-1-matthew.schwartz@linux.dev
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Matthew Schwartz
2026-01-03 12:42:26 -08:00
committed by Greg Kroah-Hartman
parent ed1613fc18
commit 5f0bf80cc5
3 changed files with 6 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

3
drivers/misc/cardreader/rts5249.c
View File

@@ -78,6 +78,9 @@ static void rtsx_base_fetch_vendor_settings(struct rtsx_pcr *pcr)
if (CHK_PCI_PID(pcr, PID_524A) || CHK_PCI_PID(pcr, PID_525A))
pcr->rtd3_en = rtsx_reg_to_rtd3_uhsii(reg);
if (CHK_PCI_PID(pcr, PID_525A))
pcr->extra_caps |= EXTRA_CAPS_NO_AGGRESSIVE_PM;
if (rtsx_check_mmc_support(reg))
pcr->extra_caps |= EXTRA_CAPS_NO_MMC;
pcr->sd30_drive_sel_3v3 = rtsx_reg_to_sd30_drive_sel_3v3(reg);

4
drivers/mmc/host/rtsx_pci_sdmmc.c
View File

@@ -1456,8 +1456,8 @@ static void realtek_init_host(struct realtek_pci_sdmmc *host)
mmc->caps = MMC_CAP_4_BIT_DATA | MMC_CAP_SD_HIGHSPEED |
MMC_CAP_MMC_HIGHSPEED | MMC_CAP_BUS_WIDTH_TEST |
MMC_CAP_UHS_SDR12 | MMC_CAP_UHS_SDR25;
if (pcr->rtd3_en)
mmc->caps = mmc->caps | MMC_CAP_AGGRESSIVE_PM;
if (pcr->rtd3_en && !(pcr->extra_caps & EXTRA_CAPS_NO_AGGRESSIVE_PM))
mmc->caps |= MMC_CAP_AGGRESSIVE_PM;
mmc->caps2 = MMC_CAP2_NO_PRESCAN_POWERUP | MMC_CAP2_FULL_PWR_CYCLE |
MMC_CAP2_NO_SDIO;
mmc->max_current_330 = 400;

1
include/linux/rtsx_pci.h
View File

@@ -1230,6 +1230,7 @@ struct rtsx_pcr {
#define EXTRA_CAPS_MMC_8BIT (1 << 5)
#define EXTRA_CAPS_NO_MMC (1 << 7)
#define EXTRA_CAPS_SD_EXPRESS (1 << 8)
#define EXTRA_CAPS_NO_AGGRESSIVE_PM (1 << 9)
u32 extra_caps;
#define IC_VER_A 0