Re: [PATCH v3 3/5] ufs: rockchip: Enable SDRAM-only DMA quirk

[Neil Armstrong]

On 1/6/26 14:57, Alexey Charkov wrote:

Rockchip RK3576 can boot fully from UFS, but as part of the boot
process the SPL needs to place part of the ATF code into PMU SRAM,
which is outside the SDRAM range that the UFSHC can access.

Enable a quirk to force bounce operation for this case.

Signed-off-by: Alexey Charkov <alch...@gmail.com>
---
  drivers/ufs/Kconfig        | 1 +
  drivers/ufs/ufs-rockchip.c | 1 +
  2 files changed, 2 insertions(+)

diff --git a/drivers/ufs/Kconfig b/drivers/ufs/Kconfig
index 6c75bb2a0790..2543b5d47c04 100644
--- a/drivers/ufs/Kconfig
+++ b/drivers/ufs/Kconfig
@@ -76,6 +76,7 @@ config UFS_RENESAS_GEN5
  config UFS_ROCKCHIP
        bool "Rockchip specific hooks to UFS controller platform driver"
        depends on UFS
+       select BOUNCE_BUFFER
        help
          This selects the Rockchip specific additions to UFSHCD platform 
driver.

diff --git a/drivers/ufs/ufs-rockchip.c b/drivers/ufs/ufs-rockchip.c

index 0384244387da..699460fc4d15 100644
--- a/drivers/ufs/ufs-rockchip.c
+++ b/drivers/ufs/ufs-rockchip.c
@@ -153,6 +153,7 @@ static int ufs_rockchip_common_init(struct ufs_hba *hba)
                return err;
        }

+ hba->quirks |= UFSHCD_QUIRK_DMA_SDRAM_ONLY;

So you really want to enable this quirk for non-SPL builds aswell ?

Neil

        host->hba = hba;

return 0;