On 18.12.2023 12:32, Dikshita Agarwal wrote:
> Implement vb2 ops for buf queue. Below are the different
> buffer attributes:
> BUF_ATTR_DEFERRED - buffer queued by client but not submitted
> to firmware.
> BUF_ATTR_READ_ONLY - processed buffer received from firmware
> as read only. These buffers are held in firmware as reference
> for future frame processing.
> BUF_ATTR_PENDING_RELEASE - buffers requested to be released
> from firmware.
> BUF_ATTR_QUEUED - buffers submitted to firmware.
> BUF_ATTR_DEQUEUED - buffers received from firmware.
> BUF_ATTR_BUFFER_DONE - buffers sent back to vb2.
>
> Buffers are submitted and received via HFI_CMD_BUFFER.
> Firmware associates below flags during buffer response:
> HFI_BUF_FW_FLAG_RELEASE_DONE - buffer released in firmware.
> HFI_BUF_FW_FLAG_READONLY - buffer used as reference in firmware.
>
> Input buffers dequeued from firmware are sent directly to vb2.
>
> Output buffers if read only, are sent to vb2 and also maintained
> in read only list. If the same read only buffer is received form
> client, HFI_BUF_HOST_FLAG_READONLY is attached to the buffer and
> submitted to firmware. Once the buffer is received from firmware
> as non read only, it is removed from read only list.
>
> Signed-off-by: Dikshita Agarwal <quic_dikshita@xxxxxxxxxxx>
> ---
[...]
>
> +enum iris_buffer_flags {
> + BUF_FLAG_KEYFRAME = 0x00000008,
> + BUF_FLAG_PFRAME = 0x00000010,
> + BUF_FLAG_BFRAME = 0x00000020,
> + BUF_FLAG_ERROR = 0x00000040,
BIT(3), 4, 5, 6?
Konrad
