diff options
Diffstat (limited to 'drivers/media/i2c/adv7842.c')
| -rw-r--r-- | drivers/media/i2c/adv7842.c | 109 |
1 files changed, 99 insertions, 10 deletions
diff --git a/drivers/media/i2c/adv7842.c b/drivers/media/i2c/adv7842.c index 1effc21e1cdd..f7a4d79ea991 100644 --- a/drivers/media/i2c/adv7842.c +++ b/drivers/media/i2c/adv7842.c @@ -546,6 +546,14 @@ static void main_reset(struct v4l2_subdev *sd) /* ----------------------------------------------------------------------- */ +static inline bool is_analog_input(struct v4l2_subdev *sd) +{ + struct adv7842_state *state = to_state(sd); + + return ((state->mode == ADV7842_MODE_RGB) || + (state->mode == ADV7842_MODE_COMP)); +} + static inline bool is_digital_input(struct v4l2_subdev *sd) { struct adv7842_state *state = to_state(sd); @@ -1027,12 +1035,72 @@ static void configure_custom_video_timings(struct v4l2_subdev *sd, cp_write(sd, 0xac, (height & 0x0f) << 4); } +static void adv7842_set_offset(struct v4l2_subdev *sd, bool auto_offset, u16 offset_a, u16 offset_b, u16 offset_c) +{ + struct adv7842_state *state = to_state(sd); + u8 offset_buf[4]; + + if (auto_offset) { + offset_a = 0x3ff; + offset_b = 0x3ff; + offset_c = 0x3ff; + } + + v4l2_dbg(2, debug, sd, "%s: %s offset: a = 0x%x, b = 0x%x, c = 0x%x\n", + __func__, auto_offset ? "Auto" : "Manual", + offset_a, offset_b, offset_c); + + offset_buf[0]= (cp_read(sd, 0x77) & 0xc0) | ((offset_a & 0x3f0) >> 4); + offset_buf[1] = ((offset_a & 0x00f) << 4) | ((offset_b & 0x3c0) >> 6); + offset_buf[2] = ((offset_b & 0x03f) << 2) | ((offset_c & 0x300) >> 8); + offset_buf[3] = offset_c & 0x0ff; + + /* Registers must be written in this order with no i2c access in between */ + if (adv_smbus_write_i2c_block_data(state->i2c_cp, 0x77, 4, offset_buf)) + v4l2_err(sd, "%s: i2c error writing to CP reg 0x77, 0x78, 0x79, 0x7a\n", __func__); +} + +static void adv7842_set_gain(struct v4l2_subdev *sd, bool auto_gain, u16 gain_a, u16 gain_b, u16 gain_c) +{ + struct adv7842_state *state = to_state(sd); + u8 gain_buf[4]; + u8 gain_man = 1; + u8 agc_mode_man = 1; + + if (auto_gain) { + gain_man = 0; + agc_mode_man = 0; + gain_a = 0x100; + gain_b = 0x100; + gain_c = 0x100; + } + + v4l2_dbg(2, debug, sd, "%s: %s gain: a = 0x%x, b = 0x%x, c = 0x%x\n", + __func__, auto_gain ? "Auto" : "Manual", + gain_a, gain_b, gain_c); + + gain_buf[0] = ((gain_man << 7) | (agc_mode_man << 6) | ((gain_a & 0x3f0) >> 4)); + gain_buf[1] = (((gain_a & 0x00f) << 4) | ((gain_b & 0x3c0) >> 6)); + gain_buf[2] = (((gain_b & 0x03f) << 2) | ((gain_c & 0x300) >> 8)); + gain_buf[3] = ((gain_c & 0x0ff)); + + /* Registers must be written in this order with no i2c access in between */ + if (adv_smbus_write_i2c_block_data(state->i2c_cp, 0x73, 4, gain_buf)) + v4l2_err(sd, "%s: i2c error writing to CP reg 0x73, 0x74, 0x75, 0x76\n", __func__); +} + static void set_rgb_quantization_range(struct v4l2_subdev *sd) { struct adv7842_state *state = to_state(sd); + bool rgb_output = io_read(sd, 0x02) & 0x02; + bool hdmi_signal = hdmi_read(sd, 0x05) & 0x80; + + v4l2_dbg(2, debug, sd, "%s: RGB quantization range: %d, RGB out: %d, HDMI: %d\n", + __func__, state->rgb_quantization_range, + rgb_output, hdmi_signal); - v4l2_dbg(2, debug, sd, "%s: rgb_quantization_range = %d\n", - __func__, state->rgb_quantization_range); + adv7842_set_gain(sd, true, 0x0, 0x0, 0x0); + adv7842_set_offset(sd, true, 0x0, 0x0, 0x0); switch (state->rgb_quantization_range) { case V4L2_DV_RGB_RANGE_AUTO: @@ -1050,7 +1118,7 @@ static void set_rgb_quantization_range(struct v4l2_subdev *sd) break; } - if (hdmi_read(sd, 0x05) & 0x80) { + if (hdmi_signal) { /* Receiving HDMI signal * Set automode */ io_write_and_or(sd, 0x02, 0x0f, 0xf0); @@ -1066,24 +1134,45 @@ static void set_rgb_quantization_range(struct v4l2_subdev *sd) } else { /* RGB full range (0-255) */ io_write_and_or(sd, 0x02, 0x0f, 0x10); + + if (is_digital_input(sd) && rgb_output) { + adv7842_set_offset(sd, false, 0x40, 0x40, 0x40); + } else { + adv7842_set_gain(sd, false, 0xe0, 0xe0, 0xe0); + adv7842_set_offset(sd, false, 0x70, 0x70, 0x70); + } } break; case V4L2_DV_RGB_RANGE_LIMITED: if (state->mode == ADV7842_MODE_COMP) { /* YCrCb limited range (16-235) */ io_write_and_or(sd, 0x02, 0x0f, 0x20); - } else { - /* RGB limited range (16-235) */ - io_write_and_or(sd, 0x02, 0x0f, 0x00); + break; } + + /* RGB limited range (16-235) */ + io_write_and_or(sd, 0x02, 0x0f, 0x00); + break; case V4L2_DV_RGB_RANGE_FULL: if (state->mode == ADV7842_MODE_COMP) { /* YCrCb full range (0-255) */ io_write_and_or(sd, 0x02, 0x0f, 0x60); + break; + } + + /* RGB full range (0-255) */ + io_write_and_or(sd, 0x02, 0x0f, 0x10); + + if (is_analog_input(sd) || hdmi_signal) + break; + + /* Adjust gain/offset for DVI-D signals only */ + if (rgb_output) { + adv7842_set_offset(sd, false, 0x40, 0x40, 0x40); } else { - /* RGB full range (0-255) */ - io_write_and_or(sd, 0x02, 0x0f, 0x10); + adv7842_set_gain(sd, false, 0xe0, 0xe0, 0xe0); + adv7842_set_offset(sd, false, 0x70, 0x70, 0x70); } break; } @@ -1717,8 +1806,8 @@ static void select_input(struct v4l2_subdev *sd, * (rev. 2.5, June 2010)" p. 17. */ afe_write(sd, 0x12, 0xfb); /* ADC noise shaping filter controls */ afe_write(sd, 0x0c, 0x0d); /* CP core gain controls */ - cp_write(sd, 0x3e, 0x80); /* CP core pre-gain control, - enable color control */ + cp_write(sd, 0x3e, 0x00); /* CP core pre-gain control */ + /* CP coast control */ cp_write(sd, 0xc3, 0x33); /* Component mode */ |