[PATCH v2 3/6] mmc: rtsx_usb_sdmmc: advertise UHS SDR104 and DDR50

[Sean Rhodes <sean@starlabs.systems>]

The rtsx_usb_sdmmc driver already implements UHS-I voltage switching,
timing setup and tuning, but it only advertises support up to SDR50.

Like the old rts5139 driver, also advertise SDR104 and DDR50 so the MMC
core can pick the best mode supported by the card.

Tested: Realtek RTS5129 (0bda:0129) + tray + Lexar 2TB SDXC
Tested: timing spec SDR104 @ 208 MHz, signal voltage 1.8 V (2026-02-24)
Signed-off-by: Sean Rhodes <sean@starlabs.systems>
---
 drivers/mmc/host/rtsx_usb_sdmmc.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/mmc/host/rtsx_usb_sdmmc.c b/drivers/mmc/host/rtsx_usb_sdmmc.c
index 6be98926387d..8d5ebe92018e 100644
--- a/drivers/mmc/host/rtsx_usb_sdmmc.c
+++ b/drivers/mmc/host/rtsx_usb_sdmmc.c
@@ -1487,6 +1487,7 @@ static void rtsx_usb_init_host(struct rtsx_usb_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 | MMC_CAP_UHS_SDR50 |
+		MMC_CAP_UHS_DDR50 | MMC_CAP_UHS_SDR104 |
 		MMC_CAP_SYNC_RUNTIME_PM;
 	mmc->caps2 = MMC_CAP2_NO_PRESCAN_POWERUP | MMC_CAP2_FULL_PWR_CYCLE |
 		MMC_CAP2_NO_SDIO;
-- 
2.51.0