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[media] atmel-isi: correct yuv swap according to different sensor outputs

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we need to configure the YCC_SWAP bits in ISI_CFG2 according to current
sensor output and Atmel ISI output format.

Current there are two cases Atmel ISI supported:
  1. Atmel ISI outputs YUYV format.
     This case we need to setup YCC_SWAP according to sensor output
     format.
  2. Atmel ISI output a pass-through formats, which means no swap.
     Just setup YCC_SWAP as default with no swap.

Signed-off-by: Josh Wu <josh.wu@atmel.com>
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
This commit is contained in:
Josh Wu 2015-11-03 03:45:08 -02:00 committed by Mauro Carvalho Chehab
parent dc51b7d015
commit ba0422bf56
1 changed files with 29 additions and 10 deletions
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39
drivers/media/platform/soc_camera/atmel-isi.c
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@ -103,13 +103,37 @@ static u32 isi_readl(struct atmel_isi *isi, u32 reg)
return readl(isi->regs + reg);
}
static u32 setup_cfg2_yuv_swap(struct atmel_isi *isi,
const struct soc_camera_format_xlate *xlate)
{
if (xlate->host_fmt->fourcc == V4L2_PIX_FMT_YUYV) {
/* all convert to YUYV */
switch (xlate->code) {
case MEDIA_BUS_FMT_VYUY8_2X8:
return ISI_CFG2_YCC_SWAP_MODE_3;
case MEDIA_BUS_FMT_UYVY8_2X8:
return ISI_CFG2_YCC_SWAP_MODE_2;
case MEDIA_BUS_FMT_YVYU8_2X8:
return ISI_CFG2_YCC_SWAP_MODE_1;
}
}
/*
* By default, no swap for the codec path of Atmel ISI. So codec
* output is same as sensor's output.
* For instance, if sensor's output is YUYV, then codec outputs YUYV.
* And if sensor's output is UYVY, then codec outputs UYVY.
*/
return ISI_CFG2_YCC_SWAP_DEFAULT;
}
static void configure_geometry(struct atmel_isi *isi, u32 width,
u32 height, u32 code)
u32 height, const struct soc_camera_format_xlate *xlate)
{
u32 cfg2;
/* According to sensor's output format to set cfg2 */
switch (code) {
switch (xlate->code) {
default:
/* Grey */
case MEDIA_BUS_FMT_Y8_1X8:
@ -117,16 +141,11 @@ static void configure_geometry(struct atmel_isi *isi, u32 width,
break;
/* YUV */
case MEDIA_BUS_FMT_VYUY8_2X8:
cfg2 = ISI_CFG2_YCC_SWAP_MODE_3 | ISI_CFG2_COL_SPACE_YCbCr;
break;
case MEDIA_BUS_FMT_UYVY8_2X8:
cfg2 = ISI_CFG2_YCC_SWAP_MODE_2 | ISI_CFG2_COL_SPACE_YCbCr;
break;
case MEDIA_BUS_FMT_YVYU8_2X8:
cfg2 = ISI_CFG2_YCC_SWAP_MODE_1 | ISI_CFG2_COL_SPACE_YCbCr;
break;
case MEDIA_BUS_FMT_YUYV8_2X8:
cfg2 = ISI_CFG2_YCC_SWAP_DEFAULT | ISI_CFG2_COL_SPACE_YCbCr;
cfg2 = ISI_CFG2_COL_SPACE_YCbCr |
setup_cfg2_yuv_swap(isi, xlate);
break;
/* RGB, TODO */
}
@ -411,7 +430,7 @@ static int start_streaming(struct vb2_queue *vq, unsigned int count)
isi_writel(isi, ISI_INTDIS, (u32)~0UL);
configure_geometry(isi, icd->user_width, icd->user_height,
icd->current_fmt->code);
icd->current_fmt);
spin_lock_irq(&isi->lock);
/* Clear any pending interrupt */