> ## Documentation Index
> Fetch the complete documentation index at: https://dragonwingdocs.qualcomm.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Enable SDHCI using kernel configuration

The following table lists the default values of kernel configuration to enable SD card functionality.

| Configuration          | Enabled by default (yes/no) | Comments                                     |
| ---------------------- | --------------------------- | -------------------------------------------- |
| `CONFIG_MMC`           | Yes                         | Enables MMC driver                           |
| `CONFIG_MMC_DEBUG`     | No                          | Enables driver debug messages                |
| `CONFIG_MMC_SDHCI`     | Yes                         | Detects SDHCI driver                         |
| `CONFIG_MMC_CQHCI`     | Yes                         | Enables Command Queue Host Control Interface |
| `CONFIG_MMC_SDHCI_MSM` | Yes                         | Enables MSM SDHCI driver                     |
| `CONFIG_MMC_BLOCK`     | Yes                         | Enables MMC block driver                     |
| `CONFIG_MMC_CRYPTO`    | Yes                         | Enables support for the MMC Crypto Engine    |