Freezer: make kernel threads nonfreezable by default

[safe/jmp/linux-2.6] / drivers / media / video / msp3400-kthreads.c

diff --git a/drivers/media/video/msp3400-kthreads.c b/drivers/media/video/msp3400-kthreads.c
index b41ee9a..d5ee262 100644 (file)
--- a/drivers/media/video/msp3400-kthreads.c
+++ b/drivers/media/video/msp3400-kthreads.c
@@ -23,6 +23,7 @@
 #include <linux/module.h>
 #include <linux/slab.h>
 #include <linux/i2c.h>
+#include <linux/freezer.h>
 #include <linux/videodev.h>
 #include <linux/videodev2.h>
 #include <media/v4l2-common.h>
@@ -244,19 +245,21 @@ static void msp3400c_set_audmode(struct i2c_client *client)
           the hardware does not support SAP. So the rxsubchans combination
           of STEREO | LANG2 does not occur. */
 
-       /* switch to mono if only mono is available */
-       if (state->rxsubchans == V4L2_TUNER_SUB_MONO)
-               audmode = V4L2_TUNER_MODE_MONO;
-       /* if bilingual */
-       else if (state->rxsubchans & V4L2_TUNER_SUB_LANG2) {
-               /* and mono or stereo, then fallback to lang1 */
-               if (audmode == V4L2_TUNER_MODE_MONO ||
-                   audmode == V4L2_TUNER_MODE_STEREO)
-                       audmode = V4L2_TUNER_MODE_LANG1;
+       if (state->mode != MSP_MODE_EXTERN) {
+               /* switch to mono if only mono is available */
+               if (state->rxsubchans == V4L2_TUNER_SUB_MONO)
+                       audmode = V4L2_TUNER_MODE_MONO;
+               /* if bilingual */
+               else if (state->rxsubchans & V4L2_TUNER_SUB_LANG2) {
+                       /* and mono or stereo, then fallback to lang1 */
+                       if (audmode == V4L2_TUNER_MODE_MONO ||
+                           audmode == V4L2_TUNER_MODE_STEREO)
+                               audmode = V4L2_TUNER_MODE_LANG1;
+               }
+               /* if stereo, and audmode is not mono, then switch to stereo */
+               else if (audmode != V4L2_TUNER_MODE_MONO)
+                       audmode = V4L2_TUNER_MODE_STEREO;
        }
-       /* if stereo, and audmode is not mono, then switch to stereo */
-       else if (audmode != V4L2_TUNER_MODE_MONO)
-               audmode = V4L2_TUNER_MODE_STEREO;
 
        /* switch demodulator */
        switch (state->mode) {
@@ -466,6 +469,7 @@ int msp3400c_thread(void *data)
 
 
        v4l_dbg(1, msp_debug, client, "msp3400 daemon started\n");
+       set_freezable();
        for (;;) {
                v4l_dbg(2, msp_debug, client, "msp3400 thread: sleep\n");
                msp_sleep(state, -1);
@@ -644,7 +648,7 @@ int msp3410d_thread(void *data)
        int val, i, std, count;
 
        v4l_dbg(1, msp_debug, client, "msp3410 daemon started\n");
-
+       set_freezable();
        for (;;) {
                v4l_dbg(2, msp_debug, client, "msp3410 thread: sleep\n");
                msp_sleep(state,-1);
@@ -848,19 +852,22 @@ static void msp34xxg_set_source(struct i2c_client *client, u16 reg, int in)
                source = 1; /* stereo or A|B */
                matrix = 0x20;
                break;
-       case V4L2_TUNER_MODE_STEREO:
        case V4L2_TUNER_MODE_LANG1:
-       default:
                source = 3; /* stereo or A */
                matrix = 0x00;
                break;
+       case V4L2_TUNER_MODE_STEREO:
+       default:
+               source = 3; /* stereo or A */
+               matrix = 0x20;
+               break;
        }
 
-       if (in == MSP_DSP_OUT_TUNER)
+       if (in == MSP_DSP_IN_TUNER)
                source = (source << 8) | 0x20;
        /* the msp34x2g puts the MAIN_AVC, MAIN and AUX sources in 12, 13, 14
           instead of 11, 12, 13. So we add one for that msp version. */
-       else if (in >= MSP_DSP_OUT_MAIN_AVC && state->has_dolby_pro_logic)
+       else if (in >= MSP_DSP_IN_MAIN_AVC && state->has_dolby_pro_logic)
                source = ((in + 1) << 8) | matrix;
        else
                source = (in << 8) | matrix;
@@ -935,7 +942,7 @@ int msp34xxg_thread(void *data)
        int val, i;
 
        v4l_dbg(1, msp_debug, client, "msp34xxg daemon started\n");
-
+       set_freezable();
        for (;;) {
                v4l_dbg(2, msp_debug, client, "msp34xxg thread: sleep\n");
                msp_sleep(state, -1);
@@ -947,13 +954,22 @@ int msp34xxg_thread(void *data)
                if (kthread_should_stop())
                        break;
 
+               if (state->mode == MSP_MODE_EXTERN) {
+                       /* no carrier scan needed, just unmute */
+                       v4l_dbg(1, msp_debug, client, "thread: no carrier scan\n");
+                       state->scan_in_progress = 0;
+                       msp_set_audio(client);
+                       continue;
+               }
+
                /* setup the chip*/
                msp34xxg_reset(client);
-               state->std = state->radio ? 0x40 : msp_standard;
+               state->std = state->radio ? 0x40 :
+                       (state->force_btsc && msp_standard == 1) ? 32 : msp_standard;
+               msp_write_dem(client, 0x20, state->std);
+               /* start autodetect */
                if (state->std != 1)
                        goto unmute;
-               /* start autodetect */
-               msp_write_dem(client, 0x20, state->std);
 
                /* watch autodetect */
                v4l_dbg(1, msp_debug, client, "started autodetect, waiting for result\n");
@@ -978,6 +994,11 @@ int msp34xxg_thread(void *data)
                v4l_dbg(1, msp_debug, client, "detected standard: %s (0x%04x)\n",
                        msp_standard_std_name(state->std), state->std);
 
+               if (state->std == 9) {
+                       /* AM NICAM mode */
+                       msp_write_dsp(client, 0x0e, 0x7c00);
+               }
+
                /* unmute: dispatch sound to scart output, set scart volume */
                msp_set_audio(client);
 
@@ -1013,6 +1034,9 @@ static int msp34xxg_detect_stereo(struct i2c_client *client)
        int is_stereo = status & 0x40;
        int oldrx = state->rxsubchans;
 
+       if (state->mode == MSP_MODE_EXTERN)
+               return 0;
+
        state->rxsubchans = 0;
        if (is_stereo)
                state->rxsubchans = V4L2_TUNER_SUB_STEREO;