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[media] saa7115: add support for double-rate ASCLK 

Some devices expect a double rate ASCLK. Add a flag to let the driver know
through the s_crystal_freq call.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Hans Verkuil 2013-03-11 03:47:25 -03:00 committed by Mauro Carvalho Chehab
parent c875dee536
commit 1589037f87
2 changed files with 15 additions and 8 deletions
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16
drivers/media/i2c/saa7115.c
View File

@ -83,9 +83,10 @@ struct saa711x_state {
u32 ident;
u32 audclk_freq;
u32 crystal_freq;
u8 ucgc;
bool ucgc;
u8 cgcdiv;
u8 apll;
bool apll;
bool double_asclk;
};
static inline struct saa711x_state *to_state(struct v4l2_subdev *sd)
@ -732,8 +733,12 @@ static int saa711x_s_clock_freq(struct v4l2_subdev *sd, u32 freq)
if (state->apll)
acc |= 0x08;
if (state->double_asclk) {
acpf <<= 1;
acni <<= 1;
}
saa711x_write(sd, R_38_CLK_RATIO_AMXCLK_TO_ASCLK, 0x03);
saa711x_write(sd, R_39_CLK_RATIO_ASCLK_TO_ALRCLK, 0x10);
saa711x_write(sd, R_39_CLK_RATIO_ASCLK_TO_ALRCLK, 0x10 << state->double_asclk);
saa711x_write(sd, R_3A_AUD_CLK_GEN_BASIC_SETUP, acc);
saa711x_write(sd, R_30_AUD_MAST_CLK_CYCLES_PER_FIELD, acpf & 0xff);
@ -1302,9 +1307,10 @@ static int saa711x_s_crystal_freq(struct v4l2_subdev *sd, u32 freq, u32 flags)
if (freq != SAA7115_FREQ_32_11_MHZ && freq != SAA7115_FREQ_24_576_MHZ)
return -EINVAL;
state->crystal_freq = freq;
state->double_asclk = flags & SAA7115_FREQ_FL_DOUBLE_ASCLK;
state->cgcdiv = (flags & SAA7115_FREQ_FL_CGCDIV) ? 3 : 4;
state->ucgc = (flags & SAA7115_FREQ_FL_UCGC) ? 1 : 0;
state->apll = (flags & SAA7115_FREQ_FL_APLL) ? 1 : 0;
state->ucgc = flags & SAA7115_FREQ_FL_UCGC;
state->apll = flags & SAA7115_FREQ_FL_APLL;
saa711x_s_clock_freq(sd, state->audclk_freq);
return 0;
}

7
include/media/saa7115.h
View File

@ -59,9 +59,10 @@
#define SAA7115_FREQ_24_576_MHZ 24576000 /* 24.576 MHz crystal */
/* SAA7115 v4l2_crystal_freq audio clock control flags */
#define SAA7115_FREQ_FL_UCGC (1 << 0) /* SA 3A[7], UCGC, SAA7115 only */
#define SAA7115_FREQ_FL_CGCDIV (1 << 1) /* SA 3A[6], CGCDIV, SAA7115 only */
#define SAA7115_FREQ_FL_APLL (1 << 2) /* SA 3A[3], APLL, SAA7114/5 only */
#define SAA7115_FREQ_FL_UCGC (1 << 0) /* SA 3A[7], UCGC, SAA7115 only */
#define SAA7115_FREQ_FL_CGCDIV (1 << 1) /* SA 3A[6], CGCDIV, SAA7115 only */
#define SAA7115_FREQ_FL_APLL (1 << 2) /* SA 3A[3], APLL, SAA7114/5 only */
#define SAA7115_FREQ_FL_DOUBLE_ASCLK (1 << 3) /* SA 39, LRDIV, SAA7114/5 only */
#endif