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[media] davinci: vpif: add support for clipping on output data

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add hardware clipping support for VPIF output data. This
is needed as it is possible that the external encoder
might get confused between the FF or 00 which are a part
of the data and that of the SAV or EAV codes.

Signed-off-by: Manjunath Hadli <manjunath.hadli@ti.com>
Signed-off-by: Lad, Prabhakar <prabhakar.lad@ti.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Manjunath Hadli 2012-06-29 03:20:12 -03:00 committed by Mauro Carvalho Chehab
parent 2401dd25c7
commit 6964b10363
3 changed files with 42 additions and 0 deletions
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30
drivers/media/video/davinci/vpif.h
View file

@ -211,6 +211,12 @@ static inline void vpif_clr_bit(u32 reg, u32 bit)
#define VPIF_CH3_INT_CTRL_SHIFT (6)
#define VPIF_CH_INT_CTRL_SHIFT (6)
#define VPIF_CH2_CLIP_ANC_EN 14
#define VPIF_CH2_CLIP_ACTIVE_EN 13
#define VPIF_CH3_CLIP_ANC_EN 14
#define VPIF_CH3_CLIP_ACTIVE_EN 13
/* enabled interrupt on both the fields on vpid_ch0_ctrl register */
#define channel0_intr_assert() (regw((regr(VPIF_CH0_CTRL)|\
(VPIF_INT_BOTH << VPIF_CH0_INT_CTRL_SHIFT)), VPIF_CH0_CTRL))
@ -515,6 +521,30 @@ static inline void channel3_raw_enable(int enable, u8 index)
vpif_clr_bit(VPIF_CH3_CTRL, mask);
}
/* function to enable clipping (for both active and blanking regions) on ch 2 */
static inline void channel2_clipping_enable(int enable)
{
if (enable) {
vpif_set_bit(VPIF_CH2_CTRL, VPIF_CH2_CLIP_ANC_EN);
vpif_set_bit(VPIF_CH2_CTRL, VPIF_CH2_CLIP_ACTIVE_EN);
} else {
vpif_clr_bit(VPIF_CH2_CTRL, VPIF_CH2_CLIP_ANC_EN);
vpif_clr_bit(VPIF_CH2_CTRL, VPIF_CH2_CLIP_ACTIVE_EN);
}
}
/* function to enable clipping (for both active and blanking regions) on ch 2 */
static inline void channel3_clipping_enable(int enable)
{
if (enable) {
vpif_set_bit(VPIF_CH3_CTRL, VPIF_CH3_CLIP_ANC_EN);
vpif_set_bit(VPIF_CH3_CTRL, VPIF_CH3_CLIP_ACTIVE_EN);
} else {
vpif_clr_bit(VPIF_CH3_CTRL, VPIF_CH3_CLIP_ANC_EN);
vpif_clr_bit(VPIF_CH3_CTRL, VPIF_CH3_CLIP_ACTIVE_EN);
}
}
/* inline function to set buffer addresses in case of Y/C non mux mode */
static inline void ch2_set_videobuf_addr_yc_nmux(unsigned long top_strt_luma,
unsigned long btm_strt_luma,

10
drivers/media/video/davinci/vpif_display.c
View file

@ -306,6 +306,8 @@ static int vpif_start_streaming(struct vb2_queue *vq, unsigned int count)
channel2_intr_assert();
channel2_intr_enable(1);
enable_channel2(1);
if (vpif_config_data->ch2_clip_en)
channel2_clipping_enable(1);
}
if ((VPIF_CHANNEL3_VIDEO == ch->channel_id)
@ -313,6 +315,8 @@ static int vpif_start_streaming(struct vb2_queue *vq, unsigned int count)
channel3_intr_assert();
channel3_intr_enable(1);
enable_channel3(1);
if (vpif_config_data->ch3_clip_en)
channel3_clipping_enable(1);
}
channel_first_int[VPIF_VIDEO_INDEX][ch->channel_id] = 1;
@ -1140,6 +1144,8 @@ static int vpif_streamoff(struct file *file, void *priv,
struct vpif_fh *fh = priv;
struct channel_obj *ch = fh->channel;
struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX];
struct vpif_display_config *vpif_config_data =
vpif_dev->platform_data;
if (buftype != V4L2_BUF_TYPE_VIDEO_OUTPUT) {
vpif_err("buffer type not supported\n");
@ -1159,11 +1165,15 @@ static int vpif_streamoff(struct file *file, void *priv,
if (buftype == V4L2_BUF_TYPE_VIDEO_OUTPUT) {
/* disable channel */
if (VPIF_CHANNEL2_VIDEO == ch->channel_id) {
if (vpif_config_data->ch2_clip_en)
channel2_clipping_enable(0);
enable_channel2(0);
channel2_intr_enable(0);
}
if ((VPIF_CHANNEL3_VIDEO == ch->channel_id) ||
(2 == common->started)) {
if (vpif_config_data->ch3_clip_en)
channel3_clipping_enable(0);
enable_channel3(0);
channel3_intr_enable(0);
}

2
include/media/davinci/vpif_types.h
View file

@ -50,6 +50,8 @@ struct vpif_display_config {
const char **output;
int output_count;
const char *card_name;
bool ch2_clip_en;
bool ch3_clip_en;
};
struct vpif_input {