diff options
Diffstat (limited to 'drivers/media/platform/renesas/vsp1/vsp1_pipe.c')
| -rw-r--r-- | drivers/media/platform/renesas/vsp1/vsp1_pipe.c | 85 |
1 files changed, 81 insertions, 4 deletions
diff --git a/drivers/media/platform/renesas/vsp1/vsp1_pipe.c b/drivers/media/platform/renesas/vsp1/vsp1_pipe.c index 68d05243c3ee..fc66dcfdb838 100644 --- a/drivers/media/platform/renesas/vsp1/vsp1_pipe.c +++ b/drivers/media/platform/renesas/vsp1/vsp1_pipe.c @@ -444,6 +444,10 @@ void vsp1_pipeline_propagate_alpha(struct vsp1_pipeline *pipe, vsp1_uds_set_alpha(pipe->uds, dlb, alpha); } +/* ----------------------------------------------------------------------------- + * VSP1 Partition Algorithm support + */ + /* * Propagate the partition calculations through the pipeline * @@ -452,10 +456,10 @@ void vsp1_pipeline_propagate_alpha(struct vsp1_pipeline *pipe, * source. Each entity must produce the partition required for the previous * entity in the pipeline. */ -void vsp1_pipeline_propagate_partition(struct vsp1_pipeline *pipe, - struct vsp1_partition *partition, - unsigned int index, - struct vsp1_partition_window *window) +static void vsp1_pipeline_propagate_partition(struct vsp1_pipeline *pipe, + struct vsp1_partition *partition, + unsigned int index, + struct vsp1_partition_window *window) { struct vsp1_entity *entity; @@ -466,3 +470,76 @@ void vsp1_pipeline_propagate_partition(struct vsp1_pipeline *pipe, } } +/* + * vsp1_pipeline_calculate_partition - Calculate pipeline configuration for a + * partition + * + * @pipe: the pipeline + * @partition: partition that will hold the calculated values + * @div_size: pre-determined maximum partition division size + * @index: partition index + */ +void vsp1_pipeline_calculate_partition(struct vsp1_pipeline *pipe, + struct vsp1_partition *partition, + unsigned int div_size, + unsigned int index) +{ + const struct v4l2_mbus_framefmt *format; + struct vsp1_partition_window window; + unsigned int modulus; + + /* + * Partitions are computed on the size before rotation, use the format + * at the WPF sink. + */ + format = v4l2_subdev_state_get_format(pipe->output->entity.state, + RWPF_PAD_SINK); + + /* A single partition simply processes the output size in full. */ + if (pipe->partitions <= 1) { + window.left = 0; + window.width = format->width; + + vsp1_pipeline_propagate_partition(pipe, partition, index, + &window); + return; + } + + /* Initialise the partition with sane starting conditions. */ + window.left = index * div_size; + window.width = div_size; + + modulus = format->width % div_size; + + /* + * We need to prevent the last partition from being smaller than the + * *minimum* width of the hardware capabilities. + * + * If the modulus is less than half of the partition size, + * the penultimate partition is reduced to half, which is added + * to the final partition: |1234|1234|1234|12|341| + * to prevent this: |1234|1234|1234|1234|1|. + */ + if (modulus) { + /* + * pipe->partitions is 1 based, whilst index is a 0 based index. + * Normalise this locally. + */ + unsigned int partitions = pipe->partitions - 1; + + if (modulus < div_size / 2) { + if (index == partitions - 1) { + /* Halve the penultimate partition. */ + window.width = div_size / 2; + } else if (index == partitions) { + /* Increase the final partition. */ + window.width = (div_size / 2) + modulus; + window.left -= div_size / 2; + } + } else if (index == partitions) { + window.width = modulus; + } + } + + vsp1_pipeline_propagate_partition(pipe, partition, index, &window); +} |