From ff5f26b40ab43a6c263834665bfa10d6114a27cd Mon Sep 17 00:00:00 2001 From: Hans Verkuil Date: Sat, 6 Sep 2008 07:00:24 -0300 Subject: [PATCH] V4L/DVB (8918): saa6752hs: simplify writing to registers Add some utility functions to set registers. Signed-off-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab --- drivers/media/video/saa7134/saa6752hs.c | 127 +++++++++--------------- 1 file changed, 49 insertions(+), 78 deletions(-) diff --git a/drivers/media/video/saa7134/saa6752hs.c b/drivers/media/video/saa7134/saa6752hs.c index f40cb0b479b..1fb6eccdade 100644 --- a/drivers/media/video/saa7134/saa6752hs.c +++ b/drivers/media/video/saa7134/saa6752hs.c @@ -224,7 +224,7 @@ static struct saa6752hs_mpeg_params param_defaults = /* ---------------------------------------------------------------------- */ -static int saa6752hs_chip_command(struct i2c_client* client, +static int saa6752hs_chip_command(struct i2c_client *client, enum saa6752hs_command command) { unsigned char buf[3]; @@ -291,54 +291,61 @@ static int saa6752hs_chip_command(struct i2c_client* client, } -static int saa6752hs_set_bitrate(struct i2c_client* client, +static inline void set_reg8(struct i2c_client *client, uint8_t reg, uint8_t val) +{ + u8 buf[2]; + + buf[0] = reg; + buf[1] = val; + i2c_master_send(client, buf, 2); +} + +static inline void set_reg16(struct i2c_client *client, uint8_t reg, uint16_t val) +{ + u8 buf[3]; + + buf[0] = reg; + buf[1] = val >> 8; + buf[2] = val & 0xff; + i2c_master_send(client, buf, 3); +} + +static int saa6752hs_set_bitrate(struct i2c_client *client, struct saa6752hs_state *h) { struct saa6752hs_mpeg_params *params = &h->params; - u8 buf[3]; int tot_bitrate; + int is_384k; /* set the bitrate mode */ - buf[0] = 0x71; - buf[1] = (params->vi_bitrate_mode == V4L2_MPEG_VIDEO_BITRATE_MODE_VBR) ? 0 : 1; - i2c_master_send(client, buf, 2); + set_reg8(client, 0x71, + params->vi_bitrate_mode != V4L2_MPEG_VIDEO_BITRATE_MODE_VBR); /* set the video bitrate */ if (params->vi_bitrate_mode == V4L2_MPEG_VIDEO_BITRATE_MODE_VBR) { /* set the target bitrate */ - buf[0] = 0x80; - buf[1] = params->vi_bitrate >> 8; - buf[2] = params->vi_bitrate & 0xff; - i2c_master_send(client, buf, 3); + set_reg16(client, 0x80, params->vi_bitrate); /* set the max bitrate */ - buf[0] = 0x81; - buf[1] = params->vi_bitrate_peak >> 8; - buf[2] = params->vi_bitrate_peak & 0xff; - i2c_master_send(client, buf, 3); + set_reg16(client, 0x81, params->vi_bitrate_peak); tot_bitrate = params->vi_bitrate_peak; } else { /* set the target bitrate (no max bitrate for CBR) */ - buf[0] = 0x81; - buf[1] = params->vi_bitrate >> 8; - buf[2] = params->vi_bitrate & 0xff; - i2c_master_send(client, buf, 3); + set_reg16(client, 0x81, params->vi_bitrate); tot_bitrate = params->vi_bitrate; } /* set the audio encoding */ - buf[0] = 0x93; - buf[1] = (params->au_encoding == V4L2_MPEG_AUDIO_ENCODING_AC3); - i2c_master_send(client, buf, 2); + set_reg8(client, 0x93, + params->au_encoding == V4L2_MPEG_AUDIO_ENCODING_AC3); /* set the audio bitrate */ - buf[0] = 0x94; if (params->au_encoding == V4L2_MPEG_AUDIO_ENCODING_AC3) - buf[1] = V4L2_MPEG_AUDIO_AC3_BITRATE_384K == params->au_ac3_bitrate; + is_384k = V4L2_MPEG_AUDIO_AC3_BITRATE_384K == params->au_ac3_bitrate; else - buf[1] = V4L2_MPEG_AUDIO_L2_BITRATE_384K == params->au_l2_bitrate; - tot_bitrate += buf[1] ? 384 : 256; - i2c_master_send(client, buf, 2); + is_384k = V4L2_MPEG_AUDIO_L2_BITRATE_384K == params->au_l2_bitrate; + set_reg8(client, 0x94, is_384k); + tot_bitrate += is_384k ? 384 : 256; /* Note: the total max bitrate is determined by adding the video and audio bitrates together and also adding an extra 768kbit/s to stay on the @@ -349,16 +356,12 @@ static int saa6752hs_set_bitrate(struct i2c_client* client, tot_bitrate = MPEG_TOTAL_TARGET_BITRATE_MAX; /* set the total bitrate */ - buf[0] = 0xb1; - buf[1] = tot_bitrate >> 8; - buf[2] = tot_bitrate & 0xff; - i2c_master_send(client, buf, 3); - + set_reg16(client, 0xb1, tot_bitrate); return 0; } -static void saa6752hs_set_subsampling(struct i2c_client* client, - struct v4l2_format* f) +static void saa6752hs_set_subsampling(struct i2c_client *client, + struct v4l2_format *f) { struct saa6752hs_state *h = i2c_get_clientdata(client); int dist_352, dist_480, dist_720; @@ -665,51 +668,31 @@ static int saa6752hs_init(struct i2c_client *client, u32 leading_null_bytes) h = i2c_get_clientdata(client); /* Set video format - must be done first as it resets other settings */ - buf[0] = 0x41; - buf[1] = h->video_format; - i2c_master_send(client, buf, 2); + set_reg8(client, 0x41, h->video_format); /* Set number of lines in input signal */ - buf[0] = 0x40; - buf[1] = 0x00; - if (h->standard & V4L2_STD_525_60) - buf[1] = 0x01; - i2c_master_send(client, buf, 2); + set_reg8(client, 0x40, (h->standard & V4L2_STD_525_60) ? 1 : 0); /* set bitrate */ saa6752hs_set_bitrate(client, h); /* Set GOP structure {3, 13} */ - buf[0] = 0x72; - buf[1] = 0x03; - buf[2] = 0x0D; - i2c_master_send(client,buf,3); + set_reg16(client, 0x72, 0x030d); /* Set minimum Q-scale {4} */ - buf[0] = 0x82; - buf[1] = 0x04; - i2c_master_send(client,buf,2); + set_reg8(client, 0x82, 0x04); /* Set maximum Q-scale {12} */ - buf[0] = 0x83; - buf[1] = 0x0C; - i2c_master_send(client,buf,2); + set_reg8(client, 0x83, 0x0c); /* Set Output Protocol */ - buf[0] = 0xD0; - buf[1] = 0x81; - i2c_master_send(client,buf,2); + set_reg8(client, 0xd0, 0x81); /* Set video output stream format {TS} */ - buf[0] = 0xB0; - buf[1] = 0x05; - i2c_master_send(client,buf,2); + set_reg8(client, 0xb0, 0x05); /* Set leading null byte for TS */ - buf[0] = 0xF6; - buf[1] = (leading_null_bytes >> 8) & 0xff; - buf[2] = leading_null_bytes & 0xff; - i2c_master_send(client, buf, 3); + set_reg16(client, 0xf6, leading_null_bytes); /* compute PAT */ memcpy(localPAT, PAT, sizeof(PAT)); @@ -744,33 +727,21 @@ static int saa6752hs_init(struct i2c_client *client, u32 leading_null_bytes) localPMT[size - 1] = crc & 0xFF; /* Set Audio PID */ - buf[0] = 0xC1; - buf[1] = (h->params.ts_pid_audio >> 8) & 0xFF; - buf[2] = h->params.ts_pid_audio & 0xFF; - i2c_master_send(client,buf,3); + set_reg16(client, 0xc1, h->params.ts_pid_audio); /* Set Video PID */ - buf[0] = 0xC0; - buf[1] = (h->params.ts_pid_video >> 8) & 0xFF; - buf[2] = h->params.ts_pid_video & 0xFF; - i2c_master_send(client,buf,3); + set_reg16(client, 0xc0, h->params.ts_pid_video); /* Set PCR PID */ - buf[0] = 0xC4; - buf[1] = (h->params.ts_pid_pcr >> 8) & 0xFF; - buf[2] = h->params.ts_pid_pcr & 0xFF; - i2c_master_send(client,buf,3); + set_reg16(client, 0xc4, h->params.ts_pid_pcr); /* Send SI tables */ i2c_master_send(client, localPAT, sizeof(PAT)); i2c_master_send(client, localPMT, size); /* mute then unmute audio. This removes buzzing artefacts */ - buf[0] = 0xa4; - buf[1] = 1; - i2c_master_send(client, buf, 2); - buf[1] = 0; - i2c_master_send(client, buf, 2); + set_reg8(client, 0xa4, 1); + set_reg8(client, 0xa4, 0); /* start it going */ saa6752hs_chip_command(client, SAA6752HS_COMMAND_START); -- 2.41.0