V4L/DVB (6051): cx25840: make proper use of SOFT_RESET

Whenever the 0x80b register is used the microcontroller should be reset.

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

2 files changed, 12 insertions, 17 deletions

diff --git a/drivers/media/video/cx25840/cx25840-audio.c b/drivers/media/video/cx25840/cx25840-audio.c
index f93b5160bb4f..3d46a776df36 100644
--- a/drivers/media/video/cx25840/cx25840-audio.c
+++ b/drivers/media/video/cx25840/cx25840-audio.c
@@ -157,13 +157,12 @@ void cx25840_audio_set_path(struct i2c_client *client)
 {
         struct cx25840_state *state = i2c_get_clientdata(client);
 
+        /* assert soft reset */
+        cx25840_and_or(client, 0x810, ~0x1, 0x01);
+
         /* stop microcontroller */
         cx25840_and_or(client, 0x803, ~0x10, 0);
 
-        /* assert soft reset */
-        if (!state->is_cx25836)
-                cx25840_and_or(client, 0x810, ~0x1, 0x01);
-
         /* Mute everything to prevent the PFFT! */
         cx25840_write(client, 0x8d3, 0x1f);
 
@@ -181,15 +180,14 @@ void cx25840_audio_set_path(struct i2c_client *client)
 
         set_audclk_freq(client, state->audclk_freq);
 
-        /* deassert soft reset */
-        if (!state->is_cx25836)
-                cx25840_and_or(client, 0x810, ~0x1, 0x00);
-
         if (state->aud_input != CX25840_AUDIO_SERIAL) {
                 /* When the microcontroller detects the
                  * audio format, it will unmute the lines */
                 cx25840_and_or(client, 0x803, ~0x10, 0x10);
         }
+
+        /* deassert soft reset */
+        cx25840_and_or(client, 0x810, ~0x1, 0x00);
 }
 
 static int get_volume(struct i2c_client *client)
@@ -330,18 +328,18 @@ int cx25840_audio(struct i2c_client *client, unsigned int cmd, void *arg)
 
         switch (cmd) {
         case VIDIOC_INT_AUDIO_CLOCK_FREQ:
+                if (!state->is_cx25836)
+                        cx25840_and_or(client, 0x810, ~0x1, 1);
                 if (state->aud_input != CX25840_AUDIO_SERIAL) {
                         cx25840_and_or(client, 0x803, ~0x10, 0);
                         cx25840_write(client, 0x8d3, 0x1f);
                 }
-                if (!state->is_cx25836)
-                        cx25840_and_or(client, 0x810, ~0x1, 1);
                 retval = set_audclk_freq(client, *(u32 *)arg);
-                if (!state->is_cx25836)
-                        cx25840_and_or(client, 0x810, ~0x1, 0);
                 if (state->aud_input != CX25840_AUDIO_SERIAL) {
                         cx25840_and_or(client, 0x803, ~0x10, 0x10);
                 }
+                if (!state->is_cx25836)
+                        cx25840_and_or(client, 0x810, ~0x1, 0);
                 return retval;
 
         case VIDIOC_G_CTRL:
diff --git a/drivers/media/video/cx25840/cx25840-core.c b/drivers/media/video/cx25840/cx25840-core.c
index 8f9c32613b45..ae90d1c3d12b 100644
--- a/drivers/media/video/cx25840/cx25840-core.c
+++ b/drivers/media/video/cx25840/cx25840-core.c
@@ -250,6 +250,7 @@ static void input_change(struct i2c_client *client)
         }
         cx25840_and_or(client, 0x401, ~0x60, 0);
         cx25840_and_or(client, 0x401, ~0x60, 0x60);
+        cx25840_and_or(client, 0x810, ~0x01, 1);
 
         if (state->radio) {
                 cx25840_write(client, 0x808, 0xf9);
@@ -284,11 +285,7 @@ static void input_change(struct i2c_client *client)
                 cx25840_write(client, 0x80b, 0x10);
         }
 
-        if (cx25840_read(client, 0x803) & 0x10) {
-                /* restart audio decoder microcontroller */
-                cx25840_and_or(client, 0x803, ~0x10, 0x00);
-                cx25840_and_or(client, 0x803, ~0x10, 0x10);
-        }
+        cx25840_and_or(client, 0x810, ~0x01, 0);
 }
 
 static int set_input(struct i2c_client *client, enum cx25840_video_input vid_input,