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V4L/DVB (13008): gspca - stv06xx-hdcs: Fixup exposure 

Initialize image size before it's used to initialize exposure.
Work around lack of exposure set hardware latch with a sequence of
register writes in a single I2C command packet.

Signed-off-by: James Blanford <jhblanford@gmail.com>
Signed-off-by: Erik Andrén <erik.andren@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
James Blanford 2009-09-18 14:53:09 -03:00 committed by Mauro Carvalho Chehab
parent 4fac17b4e7
commit 4711ca823b
1 changed files with 31 additions and 18 deletions
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49
drivers/media/video/gspca/stv06xx/stv06xx_hdcs.c
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@ -280,7 +280,7 @@ static int hdcs_set_exposure(struct gspca_dev *gspca_dev, __s32 val)
within the column processing period */
int mnct;
int cycles, err;
u8 exp[4];
u8 exp[14];
cycles = val * HDCS_CLK_FREQ_MHZ;
@ -316,24 +316,37 @@ static int hdcs_set_exposure(struct gspca_dev *gspca_dev, __s32 val)
srowexp = max_srowexp;
if (IS_1020(sd)) {
exp[0] = rowexp & 0xff;
exp[1] = rowexp >> 8;
exp[2] = (srowexp >> 2) & 0xff;
/* this clears exposure error flag */
exp[3] = 0x1;
err = hdcs_reg_write_seq(sd, HDCS_ROWEXPL, exp, 4);
exp[0] = HDCS20_CONTROL;
exp[1] = 0x00; /* Stop streaming */
exp[2] = HDCS_ROWEXPL;
exp[3] = rowexp & 0xff;
exp[4] = HDCS_ROWEXPH;
exp[5] = rowexp >> 8;
exp[6] = HDCS20_SROWEXP;
exp[7] = (srowexp >> 2) & 0xff;
exp[8] = HDCS20_ERROR;
exp[9] = 0x10; /* Clear exposure error flag*/
exp[10] = HDCS20_CONTROL;
exp[11] = 0x04; /* Restart streaming */
err = stv06xx_write_sensor_bytes(sd, exp, 6);
} else {
exp[0] = rowexp & 0xff;
exp[1] = rowexp >> 8;
exp[2] = srowexp & 0xff;
exp[3] = srowexp >> 8;
err = hdcs_reg_write_seq(sd, HDCS_ROWEXPL, exp, 4);
exp[0] = HDCS00_CONTROL;
exp[1] = 0x00; /* Stop streaming */
exp[2] = HDCS_ROWEXPL;
exp[3] = rowexp & 0xff;
exp[4] = HDCS_ROWEXPH;
exp[5] = rowexp >> 8;
exp[6] = HDCS00_SROWEXPL;
exp[7] = srowexp & 0xff;
exp[8] = HDCS00_SROWEXPH;
exp[9] = srowexp >> 8;
exp[10] = HDCS_STATUS;
exp[11] = 0x10; /* Clear exposure error flag*/
exp[12] = HDCS00_CONTROL;
exp[13] = 0x04; /* Restart streaming */
err = stv06xx_write_sensor_bytes(sd, exp, 7);
if (err < 0)
return err;
/* clear exposure error flag */
err = stv06xx_write_sensor(sd,
HDCS_STATUS, BIT(4));
}
PDEBUG(D_V4L2, "Writing exposure %d, rowexp %d, srowexp %d",
val, rowexp, srowexp);
@ -605,11 +618,11 @@ static int hdcs_init(struct sd *sd)
if (err < 0)
return err;
err = hdcs_set_exposure(&sd->gspca_dev, HDCS_DEFAULT_EXPOSURE);
err = hdcs_set_size(sd, hdcs->array.width, hdcs->array.height);
if (err < 0)
return err;
err = hdcs_set_size(sd, hdcs->array.width, hdcs->array.height);
err = hdcs_set_exposure(&sd->gspca_dev, HDCS_DEFAULT_EXPOSURE);
return err;
}