[PATCH v2] ata: pci: enable bus mastering

[Bin Meng]

On Tue, Apr 11, 2023 at 10:25 PM Christian Gmeiner
<christian.gmeiner at gmail.com> wrote:
>
> The non DM code path already would enable pci bus mastering. Do the
> same for the DM code path.
>
> Fixes AHCI problems I am seeing on an Intel Apollolake device.
>
> v2: Add Bin's R-b and remove the ending '.' from comment.

The changelog should go below --- otherwise it shows up in the commit message :)

>
> Signed-off-by: Christian Gmeiner <christian.gmeiner at gmail.com>
> Reviewed-by: Bin Meng <bmeng.cn at gmail.com>
> ---
>  drivers/ata/ahci.c | 7 ++++++-
>  1 file changed, 6 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c
> index 6998b82aa5..360ac2c060 100644
> --- a/drivers/ata/ahci.c
> +++ b/drivers/ata/ahci.c
> @@ -1152,7 +1152,12 @@ int ahci_probe_scsi(struct udevice *ahci_dev, ulong base)
>  int ahci_probe_scsi_pci(struct udevice *ahci_dev)
>  {
>         ulong base;
> -       u16 vendor, device;
> +       u16 vendor, device, cmd;
> +
> +       /* Enable bus mastering */
> +       dm_pci_read_config16(dev, PCI_COMMAND, &cmd);
> +       cmd |= PCI_COMMAND_MASTER;
> +       dm_pci_write_config16(dev, PCI_COMMAND, cmd);
>
>         base = (ulong)dm_pci_map_bar(ahci_dev, PCI_BASE_ADDRESS_5, 0, 0,
>                                      PCI_REGION_TYPE, PCI_REGION_MEM);

Regards,
Bin