On 03/30/2015 01:10 PM, Philipp Zabel wrote:
> set_pll not only skips PLL changes but also doesn't enable it in
> the first place if the rate is the same as the default values.
>
> Signed-off-by: Philipp Zabel <p.za...@pengutronix.de> ---
> drivers/media/i2c/tc358743.c | 5 +++-- 1 file changed, 3
> insertions(+), 2 deletions(-)
>
> diff --git a/drivers/media/i2c/tc358743.c
> b/drivers/media/i2c/tc358743.c index 85a0f7a..dd2ea16 100644 ---
> a/drivers/media/i2c/tc358743.c +++ b/drivers/media/i2c/tc358743.c
> @@ -606,6 +606,7 @@ static void tc358743_set_pll(struct v4l2_subdev
> *sd) struct tc358743_state *state = to_state(sd); struct
> tc358743_platform_data *pdata = &state->pdata; u16 pllctl0 =
> i2c_rd16(sd, PLLCTL0); + u16 pllctl1 = i2c_rd16(sd, PLLCTL1);
> u16 pllctl0_new = SET_PLL_PRD(pdata->pll_prd) |
> SET_PLL_FBD(pdata->pll_fbd);
>
> @@ -613,8 +614,8 @@ static void tc358743_set_pll(struct
> v4l2_subdev *sd)
>
> /* Only rewrite when needed, since rewriting triggers another
> format * change event. */ - if (pllctl0 != pllctl0_new) { -
> u32 hsck = (pdata->refclk_hz * pdata->pll_prd) / pdata->pll_fbd; +
> if ((pllctl0 != pllctl0_new) || ((pllctl1 & MASK_PLL_EN) == 0)) { +
> u32 hsck = (pdata->refclk_hz * pdata->pll_fbd) / pdata->pll_prd;
Yes, that is a bug that should be fixed!
The calculation of hsck is fixed in the latest version of the
driver.
Regards,
Mats Randgaard
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