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gpu: ipu-v3: image-convert: Wait for all EOFs before completing a tile

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Use a bit-mask of EOF irqs to determine when all required idmac
channel EOFs have been received for a tile conversion, and only do
tile completion processing after all EOFs have been received. Otherwise
it was found that a conversion would stall after the completion of a
tile and the start of the next tile, because the input/read idmac
channel had not completed and entered idle state, thus locking up the
channel when attempting to re-start it for the next tile.

Fixes: 0537db801bb01 ("gpu: ipu-v3: image-convert: reconfigure IC per tile")
Signed-off-by: Steve Longerbeam <slongerbeam@gmail.com>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
This commit is contained in:
Steve Longerbeam 2020-06-25 11:13:37 -07:00 committed by Philipp Zabel
parent 0f6245f42c
commit dd81d821d0
1 changed files with 83 additions and 28 deletions
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111
drivers/gpu/ipu-v3/ipu-image-convert.c
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@ -137,6 +137,17 @@ struct ipu_image_convert_ctx;
struct ipu_image_convert_chan;
struct ipu_image_convert_priv;
enum eof_irq_mask {
EOF_IRQ_IN = BIT(0),
EOF_IRQ_ROT_IN = BIT(1),
EOF_IRQ_OUT = BIT(2),
EOF_IRQ_ROT_OUT = BIT(3),
};
#define EOF_IRQ_COMPLETE (EOF_IRQ_IN | EOF_IRQ_OUT)
#define EOF_IRQ_ROT_COMPLETE (EOF_IRQ_IN | EOF_IRQ_OUT | \
EOF_IRQ_ROT_IN | EOF_IRQ_ROT_OUT)
struct ipu_image_convert_ctx {
struct ipu_image_convert_chan *chan;
@ -173,6 +184,9 @@ struct ipu_image_convert_ctx {
/* where to place converted tile in dest image */
unsigned int out_tile_map[MAX_TILES];
/* mask of completed EOF irqs at every tile conversion */
enum eof_irq_mask eof_mask;
struct list_head list;
};
@ -189,6 +203,8 @@ struct ipu_image_convert_chan {
struct ipuv3_channel *rotation_out_chan;
/* the IPU end-of-frame irqs */
int in_eof_irq;
int rot_in_eof_irq;
int out_eof_irq;
int rot_out_eof_irq;
@ -1380,6 +1396,9 @@ static int convert_start(struct ipu_image_convert_run *run, unsigned int tile)
dev_dbg(priv->ipu->dev, "%s: task %u: starting ctx %p run %p tile %u -> %u\n",
__func__, chan->ic_task, ctx, run, tile, dst_tile);
/* clear EOF irq mask */
ctx->eof_mask = 0;
if (ipu_rot_mode_is_irt(ctx->rot_mode)) {
/* swap width/height for resizer */
dest_width = d_image->tile[dst_tile].height;
@ -1615,7 +1634,7 @@ static bool ic_settings_changed(struct ipu_image_convert_ctx *ctx)
}
/* hold irqlock when calling */
static irqreturn_t do_irq(struct ipu_image_convert_run *run)
static irqreturn_t do_tile_complete(struct ipu_image_convert_run *run)
{
struct ipu_image_convert_ctx *ctx = run->ctx;
struct ipu_image_convert_chan *chan = ctx->chan;
@ -1700,6 +1719,7 @@ static irqreturn_t do_irq(struct ipu_image_convert_run *run)
ctx->cur_buf_num ^= 1;
}
ctx->eof_mask = 0; /* clear EOF irq mask for next tile */
ctx->next_tile++;
return IRQ_HANDLED;
done:
@ -1715,8 +1735,9 @@ static irqreturn_t eof_irq(int irq, void *data)
struct ipu_image_convert_priv *priv = chan->priv;
struct ipu_image_convert_ctx *ctx;
struct ipu_image_convert_run *run;
irqreturn_t ret = IRQ_HANDLED;
bool tile_complete = false;
unsigned long flags;
irqreturn_t ret;
spin_lock_irqsave(&chan->irqlock, flags);
@ -1729,27 +1750,33 @@ static irqreturn_t eof_irq(int irq, void *data)
ctx = run->ctx;
if (irq == chan->out_eof_irq) {
if (ipu_rot_mode_is_irt(ctx->rot_mode)) {
/* this is a rotation op, just ignore */
ret = IRQ_HANDLED;
goto out;
}
} else if (irq == chan->rot_out_eof_irq) {
if (irq == chan->in_eof_irq) {
ctx->eof_mask |= EOF_IRQ_IN;
} else if (irq == chan->out_eof_irq) {
ctx->eof_mask |= EOF_IRQ_OUT;
} else if (irq == chan->rot_in_eof_irq ||
irq == chan->rot_out_eof_irq) {
if (!ipu_rot_mode_is_irt(ctx->rot_mode)) {
/* this was NOT a rotation op, shouldn't happen */
dev_err(priv->ipu->dev,
"Unexpected rotation interrupt\n");
ret = IRQ_HANDLED;
goto out;
}
ctx->eof_mask |= (irq == chan->rot_in_eof_irq) ?
EOF_IRQ_ROT_IN : EOF_IRQ_ROT_OUT;
} else {
dev_err(priv->ipu->dev, "Received unknown irq %d\n", irq);
ret = IRQ_NONE;
goto out;
}
ret = do_irq(run);
if (ipu_rot_mode_is_irt(ctx->rot_mode))
tile_complete = (ctx->eof_mask == EOF_IRQ_ROT_COMPLETE);
else
tile_complete = (ctx->eof_mask == EOF_IRQ_COMPLETE);
if (tile_complete)
ret = do_tile_complete(run);
out:
spin_unlock_irqrestore(&chan->irqlock, flags);
return ret;
@ -1783,6 +1810,10 @@ static void force_abort(struct ipu_image_convert_ctx *ctx)
static void release_ipu_resources(struct ipu_image_convert_chan *chan)
{
if (chan->in_eof_irq >= 0)
free_irq(chan->in_eof_irq, chan);
if (chan->rot_in_eof_irq >= 0)
free_irq(chan->rot_in_eof_irq, chan);
if (chan->out_eof_irq >= 0)
free_irq(chan->out_eof_irq, chan);
if (chan->rot_out_eof_irq >= 0)
@ -1801,7 +1832,27 @@ static void release_ipu_resources(struct ipu_image_convert_chan *chan)
chan->in_chan = chan->out_chan = chan->rotation_in_chan =
chan->rotation_out_chan = NULL;
chan->out_eof_irq = chan->rot_out_eof_irq = -1;
chan->in_eof_irq = -1;
chan->rot_in_eof_irq = -1;
chan->out_eof_irq = -1;
chan->rot_out_eof_irq = -1;
}
static int get_eof_irq(struct ipu_image_convert_chan *chan,
struct ipuv3_channel *channel)
{
struct ipu_image_convert_priv *priv = chan->priv;
int ret, irq;
irq = ipu_idmac_channel_irq(priv->ipu, channel, IPU_IRQ_EOF);
ret = request_threaded_irq(irq, eof_irq, do_bh, 0, "ipu-ic", chan);
if (ret < 0) {
dev_err(priv->ipu->dev, "could not acquire irq %d\n", irq);
return ret;
}
return irq;
}
static int get_ipu_resources(struct ipu_image_convert_chan *chan)
@ -1837,31 +1888,33 @@ static int get_ipu_resources(struct ipu_image_convert_chan *chan)
}
/* acquire the EOF interrupts */
chan->out_eof_irq = ipu_idmac_channel_irq(priv->ipu,
chan->out_chan,
IPU_IRQ_EOF);
ret = request_threaded_irq(chan->out_eof_irq, eof_irq, do_bh,
0, "ipu-ic", chan);
ret = get_eof_irq(chan, chan->in_chan);
if (ret < 0) {
chan->in_eof_irq = -1;
goto err;
}
chan->in_eof_irq = ret;
ret = get_eof_irq(chan, chan->rotation_in_chan);
if (ret < 0) {
chan->rot_in_eof_irq = -1;
goto err;
}
chan->rot_in_eof_irq = ret;
ret = get_eof_irq(chan, chan->out_chan);
if (ret < 0) {
dev_err(priv->ipu->dev, "could not acquire irq %d\n",
chan->out_eof_irq);
chan->out_eof_irq = -1;
goto err;
}
chan->out_eof_irq = ret;
chan->rot_out_eof_irq = ipu_idmac_channel_irq(priv->ipu,
chan->rotation_out_chan,
IPU_IRQ_EOF);
ret = request_threaded_irq(chan->rot_out_eof_irq, eof_irq, do_bh,
0, "ipu-ic", chan);
ret = get_eof_irq(chan, chan->rotation_out_chan);
if (ret < 0) {
dev_err(priv->ipu->dev, "could not acquire irq %d\n",
chan->rot_out_eof_irq);
chan->rot_out_eof_irq = -1;
goto err;
}
chan->rot_out_eof_irq = ret;
return 0;
err:
@ -2440,6 +2493,8 @@ int ipu_image_convert_init(struct ipu_soc *ipu, struct device *dev)
chan->ic_task = i;
chan->priv = priv;
chan->dma_ch = &image_convert_dma_chan[i];
chan->in_eof_irq = -1;
chan->rot_in_eof_irq = -1;
chan->out_eof_irq = -1;
chan->rot_out_eof_irq = -1;