@@ -127,12 +127,9 @@ static int isc_buffer_prepare(struct vb2_buffer *vb)
return 0;
}
-static void isc_start_dma(struct isc_device *isc)
+static void isc_crop_pfe(struct isc_device *isc)
{
struct regmap *regmap = isc->regmap;
- u32 sizeimage = isc->fmt.fmt.pix.sizeimage;
- u32 dctrl_dview;
- dma_addr_t addr0;
u32 h, w;
h = isc->fmt.fmt.pix.height;
@@ -167,6 +164,14 @@ static void isc_start_dma(struct isc_device *isc)
regmap_update_bits(regmap, ISC_PFE_CFG0,
ISC_PFE_CFG0_COLEN | ISC_PFE_CFG0_ROWEN,
ISC_PFE_CFG0_COLEN | ISC_PFE_CFG0_ROWEN);
+}
+
+static void isc_start_dma(struct isc_device *isc)
+{
+ struct regmap *regmap = isc->regmap;
+ u32 sizeimage = isc->fmt.fmt.pix.sizeimage;
+ u32 dctrl_dview;
+ dma_addr_t addr0;
addr0 = vb2_dma_contig_plane_dma_addr(&isc->cur_frm->vb.vb2_buf, 0);
regmap_write(regmap, ISC_DAD0 + isc->offsets.dma, addr0);
@@ -371,6 +376,7 @@ static int isc_start_streaming(struct vb2_queue *vq, unsigned int count)
struct isc_buffer, list);
list_del(&isc->cur_frm->list);
+ isc_crop_pfe(isc);
isc_start_dma(isc);
spin_unlock_irqrestore(&isc->dma_queue_lock, flags);
The cropping configuration of the Parallel Front Engine (PFE) can be done just once when the streaming starts. The ISC configuration is in place and will not be changed while streaming. It is not effective to keep rewriting the crop registers configuration everytime start_dma is called, as this can be called for each queued buffer. Thus we can configure the cropping at start_streaming time. This change moves the code to a dedicated function. Signed-off-by: Eugen Hristev <eugen.hristev@microchip.com> --- drivers/media/platform/atmel/atmel-isc-base.c | 14 ++++++++++---- 1 file changed, 10 insertions(+), 4 deletions(-)