Heya
On 12/12/2018 08:16, jacopo mondi wrote:
> Hi Kieran,
> thanks for review
>
> On Tue, Dec 11, 2018 at 11:52:03PM +0000, Kieran Bingham wrote:
>> Hi Jacopo,
>>
>> On 11/12/2018 15:16, Jacopo Mondi wrote:
>>> Re-work the chip reset procedure to configure the CP (HDMI) and SD (AFE)
>>> cores
>>> before resetting the MIPI CSI-2 TXs.
>>>
>>> Signed-off-by: Jacopo Mondi <[email protected]>
>>> ---
>>> drivers/media/i2c/adv748x/adv748x-core.c | 24 ++++++++++--------------
>>> 1 file changed, 10 insertions(+), 14 deletions(-)
>>>
>>> diff --git a/drivers/media/i2c/adv748x/adv748x-core.c
>>> b/drivers/media/i2c/adv748x/adv748x-core.c
>>> index d94c63cb6a2e..5495dc7891e8 100644
>>> --- a/drivers/media/i2c/adv748x/adv748x-core.c
>>> +++ b/drivers/media/i2c/adv748x/adv748x-core.c
>>> @@ -353,9 +353,8 @@ static const struct adv748x_reg_value
>>> adv748x_sw_reset[] = {
>>> {ADV748X_PAGE_EOR, 0xff, 0xff} /* End of register table */
>>> };
>>>
>>> -/* Supported Formats For Script Below */
>>> -/* - 01-29 HDMI to MIPI TxA CSI 4-Lane - RGB888: */
>>
>> Is this information redundant ? (CSI-4Lane, RGB888 configuration?)
>>
>
> The CSI-2 data lane configuration has been break out from this table
> by Niklas' patches. I've tried also moving the format configuration
> out of this, but I haven't sent that change. The HDMI video direction
> is now handled at link setup time, so I guess the only relevant
> information is about the RGB888 format configured on the CP backend.
> I'll keep that.
>
Thanks for the clarification.
>>> -static const struct adv748x_reg_value adv748x_init_txa_4lane[] = {
>>> +/* Initialize CP Core. */
>>> +static const struct adv748x_reg_value adv748x_init_hdmi[] = {
>>
>> While we're here - is there much scope - or value in changing these
>> tables to functions with parameters using Niklas' adv748x_write_check() ?
>>
>> The suggestion only has value if there are parameters that we would need
>> to configure. So it might be reasonable to leave these tables.
>>
>
> Right now I don't see much value in that. I would prefer breaking out
> the format configuration from this static tables, but that's for
> later.
Perfect - I agree - doesn't need to happen in this patch.
If the format configuration can be broken out from the table later then
that's great news.
>> A general Ack on renaming to the function instead of the
>> TX/configuration though - as that makes the purpose clearer.
>>
>>
>>> /* Disable chip powerdown & Enable HDMI Rx block */
>>> {ADV748X_PAGE_IO, 0x00, 0x40},
>>>
>>> @@ -399,10 +398,8 @@ static const struct adv748x_reg_value
>>> adv748x_init_txa_4lane[] = {
>>> {ADV748X_PAGE_EOR, 0xff, 0xff} /* End of register table */
>>> };
>>>
>>> -/* 02-01 Analog CVBS to MIPI TX-B CSI 1-Lane - */
>>> -/* Autodetect CVBS Single Ended In Ain 1 - MIPI Out */
>>> -static const struct adv748x_reg_value adv748x_init_txb_1lane[] = {
>>> -
>>
>> Same comments as above really :)
>>
>
> I'll see what I can keep.
>
> Thanks
> j
>
>>> +/* Initialize AFE core. */
>>> +static const struct adv748x_reg_value adv748x_init_afe[] = {
>>> {ADV748X_PAGE_IO, 0x00, 0x30}, /* Disable chip powerdown Rx */
>>> {ADV748X_PAGE_IO, 0xf2, 0x01}, /* Enable I2C Read Auto-Increment */
>>>
>>> @@ -445,19 +442,18 @@ static int adv748x_reset(struct adv748x_state *state)
>>> if (ret < 0)
>>> return ret;
>>>
>>> - /* Init and power down TXA */
>>> - ret = adv748x_write_regs(state, adv748x_init_txa_4lane);
>>> + /* Initialize CP and AFE cores. */
>>> + ret = adv748x_write_regs(state, adv748x_init_hdmi);
>>> if (ret)
>>> return ret;
>>>
>>> - adv748x_tx_power(&state->txa, 1);
>>> - adv748x_tx_power(&state->txa, 0);
>>> -
>>> - /* Init and power down TXB */
>>> - ret = adv748x_write_regs(state, adv748x_init_txb_1lane);
>>> + ret = adv748x_write_regs(state, adv748x_init_afe);
>>> if (ret)
>>> return ret;
>>>
>>> + /* Reset TXA and TXB */
>>> + adv748x_tx_power(&state->txa, 1);
>>> + adv748x_tx_power(&state->txa, 0);
>>> adv748x_tx_power(&state->txb, 1);
>>> adv748x_tx_power(&state->txb, 0);
>>>
>>> --
>>> 2.7.4
>>>
>>
>> --
>> Regards
>> --
>> Kieran
--
Regards
--
Kieran
