Commit 9833239e authored by Mats Randgaard's avatar Mats Randgaard Committed by Mauro Carvalho Chehab
Browse files

[media] adv7604: Receive CEA formats as RGB on VGA (RGB) input 



If the input is ADV7604_INPUT_VGA_RGB and RGB quantization range is
set to V4L2_DV_RGB_RANGE_AUTO, video with CEA timings will be
received as RGB. For ADV7604_INPUT_VGA_COMP, automatic CSC mode
will be selected.

See table 44 on page 205 in "ADV7604 Hardware Manual, Rev. F, August 2010"
for details.

Signed-off-by: default avatarMats Randgaard <matrandg@cisco.com>
Signed-off-by: default avatarHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: default avatarMauro Carvalho Chehab <m.chehab@samsung.com>
parent 1577461b

drivers/media/i2c/adv7604.c

+33 −17
Original line number Diff line number Diff line
@@ -911,26 +911,42 @@ static void set_rgb_quantization_range(struct v4l2_subdev *sd) 
{

	struct adv7604_state *state = to_state(sd);



	v4l2_dbg(2, debug, sd, "%s: rgb_quantization_range = %d\n",

		       __func__, state->rgb_quantization_range);



	switch (state->rgb_quantization_range) {

	case V4L2_DV_RGB_RANGE_AUTO:

		/* automatic */

		if (is_digital_input(sd) && !(hdmi_read(sd, 0x05) & 0x80)) {

			/* receiving DVI-D signal */

		if (state->selected_input == ADV7604_INPUT_VGA_RGB) {

			/* Receiving analog RGB signal

			 * Set RGB full range (0-255) */

			io_write_and_or(sd, 0x02, 0x0f, 0x10);

			break;

		}



		if (state->selected_input == ADV7604_INPUT_VGA_COMP) {

			/* Receiving analog YPbPr signal

			 * Set automode */

			io_write_and_or(sd, 0x02, 0x0f, 0xf0);

			break;

		}



			/* ADV7604 selects RGB limited range regardless of

			   input format (CE/IT) in automatic mode */

		if (hdmi_read(sd, 0x05) & 0x80) {

			/* Receiving HDMI signal

			 * Set automode */

			io_write_and_or(sd, 0x02, 0x0f, 0xf0);

			break;

		}



		/* Receiving DVI-D signal

		 * ADV7604 selects RGB limited range regardless of

		 * input format (CE/IT) in automatic mode */

		if (state->timings.bt.standards & V4L2_DV_BT_STD_CEA861) {

			/* RGB limited range (16-235) */

			io_write_and_or(sd, 0x02, 0x0f, 0x00);



		} else {

			/* RGB full range (0-255) */

			io_write_and_or(sd, 0x02, 0x0f, 0x10);

		}

		} else {

			/* receiving HDMI or analog signal, set automode */

			io_write_and_or(sd, 0x02, 0x0f, 0xf0);

		}

		break;

	case V4L2_DV_RGB_RANGE_LIMITED:

		/* RGB limited range (16-235) */
@@ -1709,7 +1725,7 @@ static int adv7604_log_status(struct v4l2_subdev *sd) 
	char *input_color_space_txt[16] = {

		"RGB limited range (16-235)", "RGB full range (0-255)",

		"YCbCr Bt.601 (16-235)", "YCbCr Bt.709 (16-235)",

		"XvYCC Bt.601", "XvYCC Bt.709",

		"xvYCC Bt.601", "xvYCC Bt.709",

		"YCbCr Bt.601 (0-255)", "YCbCr Bt.709 (0-255)",

		"invalid", "invalid", "invalid", "invalid", "invalid",

		"invalid", "invalid", "automatic"