From b3e440eef8a842736d63cc6a6594d80dfbb75fd9 Mon Sep 17 00:00:00 2001 From: Theodore Kilgore Date: Fri, 9 Oct 2009 03:54:49 -0300 Subject: [PATCH] V4L/DVB (13139): gspca_mr97310a: Improve VGA sensor type detection Improve (and also simplify :) gspca_mr97310a: VGA sensor type detection. As it was still failing on some machines (not with some cams, but on some machines interesting enough). Signed-off-by: Theodore Kilgore Signed-off-by: Hans de Goede Signed-off-by: Mauro Carvalho Chehab --- drivers/media/video/gspca/mr97310a.c | 89 ++++++++++++++---------------------- 1 file changed, 34 insertions(+), 55 deletions(-) diff --git a/drivers/media/video/gspca/mr97310a.c b/drivers/media/video/gspca/mr97310a.c index f4c83b3..abc56e3 100644 --- a/drivers/media/video/gspca/mr97310a.c +++ b/drivers/media/video/gspca/mr97310a.c @@ -431,12 +431,13 @@ static int sd_config(struct gspca_dev *gspca_dev, if (err_code < 0) return err_code; + err_code = stream_start(gspca_dev); + if (err_code < 0) + return err_code; + if (id->idProduct == 0x010e) { sd->cam_type = CAM_TYPE_CIF; cam->nmodes--; - err_code = stream_start(gspca_dev); - if (err_code < 0) - return err_code; err_code = cam_get_response16(gspca_dev, 0x06, 1); if (err_code < 0) return err_code; @@ -476,74 +477,52 @@ static int sd_config(struct gspca_dev *gspca_dev, } else { sd->cam_type = CAM_TYPE_VGA; - /* - * VGA cams also have two different sensor types. Detection - * requires a two-step process. - * - * Here is a report on the result of the first test for the - * known MR97310a VGA cameras. If you have another to report, - * please do. - * - * Name byte just read sd->sensor_type - * sd->do_lcd_stop - * Aiptek Pencam VGA+ 0x31 0 1 - * ION digital 0x31 0 1 - * Sakar Digital 77379 0x31 0 1 - * Argus DC-1620 0x30 1 0 - * Argus QuickClix 0x30 1 1 (see note) - * Note that this test fails to distinguish sd->sensor_type - * for the two cameras which have reported 0x30. - * Another test will be run on them. - * But the sd->do_lcd_stop setting is needed, too. - */ - - err_code = cam_get_response16(gspca_dev, 0x20, 1); - if (err_code < 0) - return err_code; - sd->sensor_type = gspca_dev->usb_buf[0] & 1; - sd->do_lcd_stop = (~gspca_dev->usb_buf[0]) & 1; - err_code = stream_start(gspca_dev); + err_code = cam_get_response16(gspca_dev, 0x07, 1); if (err_code < 0) return err_code; /* - * A second test can now resolve any remaining ambiguity in the - * identification of the camera's sensor type. Specifically, - * it now gives the correct sensor_type for the Argus DC-1620 - * and the Argus QuickClix. - * - * This second test is only run if needed, - * but additional results from testing some other cameras - * are recorded here, too: + * Here is a table of the responses to the previous command + * from the known MR97310A VGA cameras. * * Name gspca_dev->usb_buf[] sd->sensor_type + * sd->do_lcd_stop + * Aiptek Pencam VGA+ 0300 0 1 + * ION digital 0350 0 1 + * Argus DC-1620 0450 1 0 + * Argus QuickClix 0420 1 1 * - * Aiptek Pencam VGA+ 0300 (test not needed) 1 - * ION digital 0350 (test not needed) 1 - * Argus DC-1620 0450 (remains as type 0) 0 - * Argus QuickClix 0420 (corrected to type 1) 1 + * Based upon these results, we assume default settings + * and then correct as necessary, as follows. * - * This test even seems able to distinguish one VGA cam from - * another which may be useful. However, the CIF type 1 cameras - * do not like it. */ - if (!sd->sensor_type) { - err_code = cam_get_response16(gspca_dev, 0x07, 1); - if (err_code < 0) - return err_code; - + sd->sensor_type = 1; + sd->do_lcd_stop = 0; + if ((gspca_dev->usb_buf[0] != 0x03) && + (gspca_dev->usb_buf[0] != 0x04)) { + PDEBUG(D_ERR, "Unknown VGA Sensor id Byte 0: %02x", + gspca_dev->usb_buf[1]); + PDEBUG(D_ERR, "Defaults assumed, may not work"); + PDEBUG(D_ERR, "Please report this"); + } + if (gspca_dev->usb_buf[0] == 0x04) { + sd->do_lcd_stop = 1; switch (gspca_dev->usb_buf[1]) { case 0x50: + sd->sensor_type = 0; + PDEBUG(D_PROBE, "sensor_type corrected to 0"); break; case 0x20: - sd->sensor_type = 1; - PDEBUG(D_PROBE, "sensor_type corrected to 1"); + /* Nothing to do here. */ break; default: - PDEBUG(D_ERR, "Unknown VGA Sensor id : %02x", - gspca_dev->usb_buf[1]); - return -ENODEV; + PDEBUG(D_ERR, + "Unknown VGA Sensor id Byte 1: %02x", + gspca_dev->usb_buf[1]); + PDEBUG(D_ERR, + "Defaults assumed, may not work"); + PDEBUG(D_ERR, "Please report this"); } } PDEBUG(D_PROBE, "MR97310A VGA camera detected, sensor: %d", -- 2.7.4