V4L/DVB (7344): cx25840: better PAL-M and NTSC-KR handling

Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

diff --git a/drivers/media/video/cx25840/cx25840-core.c b/drivers/media/video/cx25840/cx25840-core.c
index 756a1ee..ae395f8 100644 (file)
--- a/drivers/media/video/cx25840/cx25840-core.c
+++ b/drivers/media/video/cx25840/cx25840-core.c
@@ -352,7 +352,7 @@ static void cx23885_initialize(struct i2c_client *client)
 static void input_change(struct i2c_client *client)
 {
        struct cx25840_state *state = i2c_get_clientdata(client);
-       v4l2_std_id std = cx25840_get_v4lstd(client);
+       v4l2_std_id std = state->std;
 
        /* Follow step 8c and 8d of section 3.16 in the cx25840 datasheet */
        if (std & V4L2_STD_SECAM) {
@@ -523,32 +523,34 @@ static int set_input(struct i2c_client *client, enum cx25840_video_input vid_inp
 
 /* ----------------------------------------------------------------------- */
 
-static int set_v4lstd(struct i2c_client *client, v4l2_std_id std)
+static int set_v4lstd(struct i2c_client *client)
 {
-       u8 fmt=0;       /* zero is autodetect */
+       struct cx25840_state *state = i2c_get_clientdata(client);
+       u8 fmt = 0;     /* zero is autodetect */
+       u8 pal_m = 0;
 
        /* First tests should be against specific std */
-       if (std == V4L2_STD_NTSC_M_JP) {
-               fmt=0x2;
-       } else if (std == V4L2_STD_NTSC_443) {
-               fmt=0x3;
-       } else if (std == V4L2_STD_PAL_M) {
-               fmt=0x5;
-       } else if (std == V4L2_STD_PAL_N) {
-               fmt=0x6;
-       } else if (std == V4L2_STD_PAL_Nc) {
-               fmt=0x7;
-       } else if (std == V4L2_STD_PAL_60) {
-               fmt=0x8;
+       if (state->std == V4L2_STD_NTSC_M_JP) {
+               fmt = 0x2;
+       } else if (state->std == V4L2_STD_NTSC_443) {
+               fmt = 0x3;
+       } else if (state->std == V4L2_STD_PAL_M) {
+               pal_m = 1;
+               fmt = 0x5;
+       } else if (state->std == V4L2_STD_PAL_N) {
+               fmt = 0x6;
+       } else if (state->std == V4L2_STD_PAL_Nc) {
+               fmt = 0x7;
+       } else if (state->std == V4L2_STD_PAL_60) {
+               fmt = 0x8;
        } else {
                /* Then, test against generic ones */
-               if (std & V4L2_STD_NTSC) {
-                       fmt=0x1;
-               } else if (std & V4L2_STD_PAL) {
-                       fmt=0x4;
-               } else if (std & V4L2_STD_SECAM) {
-                       fmt=0xc;
-               }
+               if (state->std & V4L2_STD_NTSC)
+                       fmt = 0x1;
+               else if (state->std & V4L2_STD_PAL)
+                       fmt = 0x4;
+               else if (state->std & V4L2_STD_SECAM)
+                       fmt = 0xc;
        }
 
        v4l_dbg(1, cx25840_debug, client, "changing video std to fmt %i\n",fmt);
@@ -563,42 +565,13 @@ static int set_v4lstd(struct i2c_client *client, v4l2_std_id std)
                cx25840_and_or(client, 0x47b, ~6, 0);
        }
        cx25840_and_or(client, 0x400, ~0xf, fmt);
+       cx25840_and_or(client, 0x403, ~0x3, pal_m);
        cx25840_vbi_setup(client);
+       if (!state->is_cx25836)
+               input_change(client);
        return 0;
 }
 
-v4l2_std_id cx25840_get_v4lstd(struct i2c_client * client)
-{
-       struct cx25840_state *state = i2c_get_clientdata(client);
-       /* check VID_FMT_SEL first */
-       u8 fmt = cx25840_read(client, 0x400) & 0xf;
-
-       if (!fmt) {
-               /* check AFD_FMT_STAT if set to autodetect */
-               fmt = cx25840_read(client, 0x40d) & 0xf;
-       }
-
-       switch (fmt) {
-       case 0x1:
-       {
-               /* if the audio std is A2-M, then this is the South Korean
-                  NTSC standard */
-               if (!state->is_cx25836 && cx25840_read(client, 0x805) == 2)
-                       return V4L2_STD_NTSC_M_KR;
-               return V4L2_STD_NTSC_M;
-       }
-       case 0x2: return V4L2_STD_NTSC_M_JP;
-       case 0x3: return V4L2_STD_NTSC_443;
-       case 0x4: return V4L2_STD_PAL;
-       case 0x5: return V4L2_STD_PAL_M;
-       case 0x6: return V4L2_STD_PAL_N;
-       case 0x7: return V4L2_STD_PAL_Nc;
-       case 0x8: return V4L2_STD_PAL_60;
-       case 0xc: return V4L2_STD_SECAM;
-       default: return V4L2_STD_UNKNOWN;
-       }
-}
-
 /* ----------------------------------------------------------------------- */
 
 static int set_v4lctrl(struct i2c_client *client, struct v4l2_control *ctrl)
@@ -718,9 +691,10 @@ static int get_v4lfmt(struct i2c_client *client, struct v4l2_format *fmt)
 
 static int set_v4lfmt(struct i2c_client *client, struct v4l2_format *fmt)
 {
+       struct cx25840_state *state = i2c_get_clientdata(client);
        struct v4l2_pix_format *pix;
        int HSC, VSC, Vsrc, Hsrc, filter, Vlines;
-       int is_50Hz = !(cx25840_get_v4lstd(client) & V4L2_STD_525_60);
+       int is_50Hz = !(state->std & V4L2_STD_525_60);
 
        switch (fmt->type) {
        case V4L2_BUF_TYPE_VIDEO_CAPTURE:
@@ -1096,12 +1070,15 @@ static int cx25840_command(struct i2c_client *client, unsigned int cmd,
        }
 
        case VIDIOC_G_STD:
-               *(v4l2_std_id *)arg = cx25840_get_v4lstd(client);
+               *(v4l2_std_id *)arg = state->std;
                break;
 
        case VIDIOC_S_STD:
+               if (state->radio == 0 && state->std == *(v4l2_std_id *)arg)
+                       return 0;
                state->radio = 0;
-               return set_v4lstd(client, *(v4l2_std_id *)arg);
+               state->std = *(v4l2_std_id *)arg;
+               return set_v4lstd(client);
 
        case AUDC_SET_RADIO:
                state->radio = 1;

diff --git a/drivers/media/video/cx25840/cx25840-core.h b/drivers/media/video/cx25840/cx25840-core.h
index 95093ed..8bf797f 100644 (file)
--- a/drivers/media/video/cx25840/cx25840-core.h
+++ b/drivers/media/video/cx25840/cx25840-core.h
@@ -38,6 +38,7 @@ struct cx25840_state {
        struct i2c_client *c;
        int pvr150_workaround;
        int radio;
+       v4l2_std_id std;
        enum cx25840_video_input vid_input;
        enum cx25840_audio_input aud_input;
        u32 audclk_freq;
@@ -60,7 +61,6 @@ int cx25840_write4(struct i2c_client *client, u16 addr, u32 value);
 u8 cx25840_read(struct i2c_client *client, u16 addr);
 u32 cx25840_read4(struct i2c_client *client, u16 addr);
 int cx25840_and_or(struct i2c_client *client, u16 addr, unsigned mask, u8 value);
-v4l2_std_id cx25840_get_v4lstd(struct i2c_client *client);
 
 /* ----------------------------------------------------------------------- */
 /* cx25850-firmware.c                                                      */

diff --git a/drivers/media/video/cx25840/cx25840-vbi.c b/drivers/media/video/cx25840/cx25840-vbi.c
index 6828f59..c754b9d 100644 (file)
--- a/drivers/media/video/cx25840/cx25840-vbi.c
+++ b/drivers/media/video/cx25840/cx25840-vbi.c
@@ -85,7 +85,7 @@ static int decode_vps(u8 * dst, u8 * p)
 void cx25840_vbi_setup(struct i2c_client *client)
 {
        struct cx25840_state *state = i2c_get_clientdata(client);
-       v4l2_std_id std = cx25840_get_v4lstd(client);
+       v4l2_std_id std = state->std;
        int hblank,hactive,burst,vblank,vactive,sc,vblank656,src_decimation;
        int luma_lpf,uv_lpf, comb;
        u32 pll_int,pll_frac,pll_post;
@@ -242,7 +242,7 @@ int cx25840_vbi(struct i2c_client *client, unsigned int cmd, void *arg)
                        0, 0, V4L2_SLICED_VPS, 0, 0,    /* 9 */
                        0, 0, 0, 0
                };
-               int is_pal = !(cx25840_get_v4lstd(client) & V4L2_STD_525_60);
+               int is_pal = !(state->std & V4L2_STD_525_60);
                int i;
 
                fmt = arg;
@@ -279,7 +279,7 @@ int cx25840_vbi(struct i2c_client *client, unsigned int cmd, void *arg)
 
        case VIDIOC_S_FMT:
        {
-               int is_pal = !(cx25840_get_v4lstd(client) & V4L2_STD_525_60);
+               int is_pal = !(state->std & V4L2_STD_525_60);
                int vbi_offset = is_pal ? 1 : 0;
                int i, x;
                u8 lcr[24];