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drm/i2c: tda998x: use more HDMI helpers 

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Russell King 2015-08-06 10:52:05 +01:00
parent ec5d3e83d3
commit 96795df15c
1 changed files with 31 additions and 40 deletions
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71
drivers/gpu/drm/i2c/tda998x_drv.c
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@ -640,66 +640,57 @@ static irqreturn_t tda998x_irq_thread(int irq, void *data)
return IRQ_RETVAL(handled);
}
static u8 tda998x_cksum(u8 *buf, size_t bytes)
{
int sum = 0;
while (bytes--)
sum -= *buf++;
return sum;
}
#define HB(x) (x)
#define PB(x) (HB(2) + 1 + (x))
static void
tda998x_write_if(struct tda998x_priv *priv, u8 bit, u16 addr,
u8 *buf, size_t size)
union hdmi_infoframe *frame)
{
u8 buf[32];
ssize_t len;
len = hdmi_infoframe_pack(frame, buf, sizeof(buf));
if (len < 0) {
dev_err(&priv->hdmi->dev,
"hdmi_infoframe_pack() type=0x%02x failed: %zd\n",
frame->any.type, len);
return;
}
reg_clear(priv, REG_DIP_IF_FLAGS, bit);
reg_write_range(priv, addr, buf, size);
reg_write_range(priv, addr, buf, len);
reg_set(priv, REG_DIP_IF_FLAGS, bit);
}
static void
tda998x_write_aif(struct tda998x_priv *priv, struct tda998x_encoder_params *p)
{
u8 buf[PB(HDMI_AUDIO_INFOFRAME_SIZE) + 1];
union hdmi_infoframe frame;
memset(buf, 0, sizeof(buf));
buf[HB(0)] = HDMI_INFOFRAME_TYPE_AUDIO;
buf[HB(1)] = 0x01;
buf[HB(2)] = HDMI_AUDIO_INFOFRAME_SIZE;
buf[PB(1)] = p->audio_frame[1] & 0x07; /* CC */
buf[PB(2)] = p->audio_frame[2] & 0x1c; /* SF */
buf[PB(4)] = p->audio_frame[4];
buf[PB(5)] = p->audio_frame[5] & 0xf8; /* DM_INH + LSV */
hdmi_audio_infoframe_init(&frame.audio);
buf[PB(0)] = tda998x_cksum(buf, sizeof(buf));
frame.audio.channels = p->audio_frame[1] & 0x07;
frame.audio.channel_allocation = p->audio_frame[4];
frame.audio.level_shift_value = (p->audio_frame[5] & 0x78) >> 3;
frame.audio.downmix_inhibit = (p->audio_frame[5] & 0x80) >> 7;
tda998x_write_if(priv, DIP_IF_FLAGS_IF4, REG_IF4_HB0, buf,
sizeof(buf));
/*
* L-PCM and IEC61937 compressed audio shall always set sample
* frequency to "refer to stream". For others, see the HDMI
* specification.
*/
frame.audio.sample_frequency = (p->audio_frame[2] & 0x1c) >> 2;
tda998x_write_if(priv, DIP_IF_FLAGS_IF4, REG_IF4_HB0, &frame);
}
static void
tda998x_write_avi(struct tda998x_priv *priv, struct drm_display_mode *mode)
{
struct hdmi_avi_infoframe frame;
u8 buf[HDMI_INFOFRAME_HEADER_SIZE + HDMI_AVI_INFOFRAME_SIZE];
ssize_t len;
union hdmi_infoframe frame;
drm_hdmi_avi_infoframe_from_display_mode(&frame, mode);
drm_hdmi_avi_infoframe_from_display_mode(&frame.avi, mode);
frame.avi.quantization_range = HDMI_QUANTIZATION_RANGE_FULL;
frame.quantization_range = HDMI_QUANTIZATION_RANGE_FULL;
len = hdmi_avi_infoframe_pack(&frame, buf, sizeof(buf));
if (len < 0) {
dev_err(&priv->hdmi->dev,
"hdmi_avi_infoframe_pack() failed: %zd\n", len);
return;
}
tda998x_write_if(priv, DIP_IF_FLAGS_IF2, REG_IF2_HB0, buf, len);
tda998x_write_if(priv, DIP_IF_FLAGS_IF2, REG_IF2_HB0, &frame);
}
static void tda998x_audio_mute(struct tda998x_priv *priv, bool on)