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Message-ID: <Pine.LNX.4.64.0903231107290.4871@axis700.grange>
Date: Mon, 23 Mar 2009 11:10:52 +0100 (CET)
From: Guennadi Liakhovetski <lg@...x.de>
To: Dan Williams <dan.j.williams@...el.com>
cc: linux-kernel@...r.kernel.org, Sascha Hauer <s.hauer@...gutronix.de>
Subject: [PATCH 1/3 v2] dma: ipu_idmac driver cosmetic clean-up
Remove superfluous semicolons, update comments.
Signed-off-by: Guennadi Liakhovetski <lg@...x.de>
---
drivers/dma/ipu/ipu_idmac.c | 33 ++++++++++++++-------------------
1 files changed, 14 insertions(+), 19 deletions(-)
diff --git a/drivers/dma/ipu/ipu_idmac.c b/drivers/dma/ipu/ipu_idmac.c
index ae50a9d..e929ef3 100644
--- a/drivers/dma/ipu/ipu_idmac.c
+++ b/drivers/dma/ipu/ipu_idmac.c
@@ -107,7 +107,7 @@ static uint32_t bytes_per_pixel(enum pixel_fmt fmt)
}
}
-/* Enable / disable direct write to memory by the Camera Sensor Interface */
+/* Enable direct write to memory by the Camera Sensor Interface */
static void ipu_ic_enable_task(struct ipu *ipu, enum ipu_channel channel)
{
uint32_t ic_conf, mask;
@@ -126,6 +126,7 @@ static void ipu_ic_enable_task(struct ipu *ipu, enum ipu_channel channel)
idmac_write_icreg(ipu, ic_conf, IC_CONF);
}
+/* Called under spin_lock_irqsave(&ipu_data.lock) */
static void ipu_ic_disable_task(struct ipu *ipu, enum ipu_channel channel)
{
uint32_t ic_conf, mask;
@@ -422,7 +423,7 @@ static void ipu_ch_param_set_size(union chan_param_mem *params,
break;
default:
dev_err(ipu_data.dev,
- "mxc ipu: unimplemented pixel format %d\n", pixel_fmt);
+ "mx3 ipu: unimplemented pixel format %d\n", pixel_fmt);
break;
}
@@ -433,20 +434,20 @@ static void ipu_ch_param_set_burst_size(union chan_param_mem *params,
uint16_t burst_pixels)
{
params->pp.npb = burst_pixels - 1;
-};
+}
static void ipu_ch_param_set_buffer(union chan_param_mem *params,
dma_addr_t buf0, dma_addr_t buf1)
{
params->pp.eba0 = buf0;
params->pp.eba1 = buf1;
-};
+}
static void ipu_ch_param_set_rotation(union chan_param_mem *params,
enum ipu_rotate_mode rotate)
{
params->pp.bam = rotate;
-};
+}
static void ipu_write_param_mem(uint32_t addr, uint32_t *data,
uint32_t num_words)
@@ -571,7 +572,7 @@ static uint32_t dma_param_addr(uint32_t dma_ch)
{
/* Channel Parameter Memory */
return 0x10000 | (dma_ch << 4);
-};
+}
static void ipu_channel_set_priority(struct ipu *ipu, enum ipu_channel channel,
bool prio)
@@ -611,7 +612,8 @@ static uint32_t ipu_channel_conf_mask(enum ipu_channel channel)
/**
* ipu_enable_channel() - enable an IPU channel.
- * @channel: channel ID.
+ * @idmac: IPU DMAC context.
+ * @ichan: IDMAC channel.
* @return: 0 on success or negative error code on failure.
*/
static int ipu_enable_channel(struct idmac *idmac, struct idmac_channel *ichan)
@@ -649,7 +651,7 @@ static int ipu_enable_channel(struct idmac *idmac, struct idmac_channel *ichan)
/**
* ipu_init_channel_buffer() - initialize a buffer for logical IPU channel.
- * @channel: channel ID.
+ * @ichan: IDMAC channel.
* @pixel_fmt: pixel format of buffer. Pixel format is a FOURCC ASCII code.
* @width: width of buffer in pixels.
* @height: height of buffer in pixels.
@@ -687,7 +689,7 @@ static int ipu_init_channel_buffer(struct idmac_channel *ichan,
}
/* IC channel's stride must be a multiple of 8 pixels */
- if ((channel <= 13) && (stride % 8)) {
+ if ((channel <= IDMAC_IC_13) && (stride % 8)) {
dev_err(ipu->dev, "Stride must be 8 pixel multiple\n");
return -EINVAL;
}
@@ -752,7 +754,7 @@ static void ipu_select_buffer(enum ipu_channel channel, int buffer_n)
/**
* ipu_update_channel_buffer() - update physical address of a channel buffer.
- * @channel: channel ID.
+ * @ichan: IDMAC channel.
* @buffer_n: buffer number to update.
* 0 or 1 are the only valid values.
* @phyaddr: buffer physical address.
@@ -1341,13 +1343,7 @@ static void ipu_gc_tasklet(unsigned long arg)
}
}
-/*
- * At the time .device_alloc_chan_resources() method is called, we cannot know,
- * whether the client will accept the channel. Thus we must only check, if we
- * can satisfy client's request but the only real criterion to verify, whether
- * the client has accepted our offer is the client_count. That's why we have to
- * perform the rest of our allocation tasks on the first call to this function.
- */
+/* Allocate and initialise a transfer descriptor. */
static struct dma_async_tx_descriptor *idmac_prep_slave_sg(struct dma_chan *chan,
struct scatterlist *sgl, unsigned int sg_len,
enum dma_data_direction direction, unsigned long tx_flags)
@@ -1432,8 +1428,7 @@ static void __idmac_terminate_all(struct dma_chan *chan)
struct idmac_tx_desc *desc = ichan->desc + i;
if (list_empty(&desc->list))
/* Descriptor was prepared, but not submitted */
- list_add(&desc->list,
- &ichan->free_list);
+ list_add(&desc->list, &ichan->free_list);
async_tx_clear_ack(&desc->txd);
}
--
1.5.4
--
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