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media: vsp1: dl: Allow chained display lists for display pipelines

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Refactor the display list header setup to allow chained display lists
with display pipelines. Chain the display lists as for mem-to-mem
pipelines, but enable the frame end interrupt for every list as display
pipelines have a single list per frame.

This feature will be used to disable writeback exactly one frame after
enabling it by chaining a writeback disable display list.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
Reviewed-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
This commit is contained in:
Laurent Pinchart 2019-03-11 20:16:33 +02:00
parent b36c6049ed
commit 5c7de45a43
1 changed files with 23 additions and 12 deletions
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35
drivers/media/platform/vsp1/vsp1_dl.c
View file

@ -770,17 +770,35 @@ static void vsp1_dl_list_fill_header(struct vsp1_dl_list *dl, bool is_last)
}
dl->header->num_lists = num_lists;
dl->header->flags = 0;
if (!list_empty(&dl->chain) && !is_last) {
/*
* Enable the interrupt for the end of each frame. In continuous mode
* chained lists are used with one list per frame, so enable the
* interrupt for each list. In singleshot mode chained lists are used
* to partition a single frame, so enable the interrupt for the last
* list only.
*/
if (!dlm->singleshot || is_last)
dl->header->flags |= VSP1_DLH_INT_ENABLE;
/*
* In continuous mode enable auto-start for all lists, as the VSP must
* loop on the same list until a new one is queued. In singleshot mode
* enable auto-start for all lists but the last to chain processing of
* partitions without software intervention.
*/
if (!dlm->singleshot || !is_last)
dl->header->flags |= VSP1_DLH_AUTO_START;
if (!is_last) {
/*
* If this display list's chain is not empty, we are on a list,
* and the next item is the display list that we must queue for
* automatic processing by the hardware.
* If this is not the last display list in the chain, queue the
* next item for automatic processing by the hardware.
*/
struct vsp1_dl_list *next = list_next_entry(dl, chain);
dl->header->next_header = next->dma;
dl->header->flags = VSP1_DLH_AUTO_START;
} else if (!dlm->singleshot) {
/*
* if the display list manager works in continuous mode, the VSP
@ -788,13 +806,6 @@ static void vsp1_dl_list_fill_header(struct vsp1_dl_list *dl, bool is_last)
* instructed to do otherwise.
*/
dl->header->next_header = dl->dma;
dl->header->flags = VSP1_DLH_INT_ENABLE | VSP1_DLH_AUTO_START;
} else {
/*
* Otherwise, in mem-to-mem mode, we work in single-shot mode
* and the next display list must not be started automatically.
*/
dl->header->flags = VSP1_DLH_INT_ENABLE;
}
if (!dl->extension)