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Xilinx ZynqMP DisplayPort Subsystem driver

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Merge tag 'drm-xilinx-dpsub-20200718' of git://linuxtv.org/pinchartl/media into drm-next

Xilinx ZynqMP DisplayPort Subsystem driver

Signed-off-by: Dave Airlie <airlied@redhat.com>

From: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200718001755.GA5962@pendragon.ideasonboard.com
This commit is contained in:
Dave Airlie 2020-07-23 15:31:29 +10:00
commit 959ed53808
21 changed files with 5984 additions and 1 deletions
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17
include/linux/dmaengine.h
View file

@ -61,6 +61,8 @@ enum dma_transaction_type {
DMA_SLAVE,
DMA_CYCLIC,
DMA_INTERLEAVE,
DMA_REPEAT,
DMA_LOAD_EOT,
/* last transaction type for creation of the capabilities mask */
DMA_TX_TYPE_END,
};
@ -176,6 +178,16 @@ struct dma_interleaved_template {
* @DMA_PREP_CMD: tell the driver that the data passed to DMA API is command
* data and the descriptor should be in different format from normal
* data descriptors.
* @DMA_PREP_REPEAT: tell the driver that the transaction shall be automatically
* repeated when it ends until a transaction is issued on the same channel
* with the DMA_PREP_LOAD_EOT flag set. This flag is only applicable to
* interleaved transactions and is ignored for all other transaction types.
* @DMA_PREP_LOAD_EOT: tell the driver that the transaction shall replace any
* active repeated (as indicated by DMA_PREP_REPEAT) transaction when the
* repeated transaction ends. Not setting this flag when the previously queued
* transaction is marked with DMA_PREP_REPEAT will cause the new transaction
* to never be processed and stay in the issued queue forever. The flag is
* ignored if the previous transaction is not a repeated transaction.
*/
enum dma_ctrl_flags {
DMA_PREP_INTERRUPT = (1 << 0),
@ -186,6 +198,8 @@ enum dma_ctrl_flags {
DMA_PREP_FENCE = (1 << 5),
DMA_CTRL_REUSE = (1 << 6),
DMA_PREP_CMD = (1 << 7),
DMA_PREP_REPEAT = (1 << 8),
DMA_PREP_LOAD_EOT = (1 << 9),
};
/**
@ -980,6 +994,9 @@ static inline struct dma_async_tx_descriptor *dmaengine_prep_interleaved_dma(
{
if (!chan || !chan->device || !chan->device->device_prep_interleaved_dma)
return NULL;
if (flags & DMA_PREP_REPEAT &&
!test_bit(DMA_REPEAT, chan->device->cap_mask.bits))
return NULL;
return chan->device->device_prep_interleaved_dma(chan, xt, flags);
}