[PATCH 1/3 v2] drm/i2c/adv7511: Add audio support
Jose Abreu
Jose.Abreu at synopsys.com
Tue Apr 5 11:00:54 UTC 2016
Hi Laurent,
On 04-04-2016 22:41, Laurent Pinchart wrote:
> Hi Jose,
>
> On Monday 04 Apr 2016 10:05:39 Jose Abreu wrote:
>> On 01-04-2016 18:10, Laurent Pinchart wrote:
>>> On Monday 28 Mar 2016 15:36:09 Jose Abreu wrote:
>>>> This patch adds audio support for the ADV7511 HDMI transmitter
>>>> using ALSA SoC.
>>>>
>>>> The code was ported from Analog Devices linux tree from
>>>> commit 1770c4a1e32b ("Merge remote-tracking branch
>>>>
>>>> 'xilinx/master' into xcomm_zynq"), which is available at:
>>>> - https://github.com/analogdevicesinc/linux/
>>>>
>>>> The main core file was renamed from adv7511.c to adv7511_core.c
>>>> so that audio and video compile into a single adv7511.ko module
>>>> and to keep up with Analog Devices kernel tree.
>>>>
>>>> The audio can be disabled using menu-config so it is possible
>>>> to use only video mode.
>>>>
>>>> The HDMI mode is automatically started at boot and the audio
>>>> (when enabled) registers as a codec into ALSA.
>>>>
>>>> SPDIF DAI format was also added to ASoC as it is required
>>>> by adv7511 audio.
>>>>
>>>> Signed-off-by: Jose Abreu <joabreu at synopsys.com>
>>>> ---
>>>>
>>>> No changes v1 -> v2.
>>>>
>>>> drivers/gpu/drm/i2c/Kconfig | 11 +
>>>> drivers/gpu/drm/i2c/Makefile | 2 +
>>>> drivers/gpu/drm/i2c/adv7511.c | 1024 ----------------------------
>>>> drivers/gpu/drm/i2c/adv7511.h | 41 ++
>>>> drivers/gpu/drm/i2c/adv7511_audio.c | 310 +++++++++++
>>>> drivers/gpu/drm/i2c/adv7511_core.c | 1005 ++++++++++++++++++++++++++++
>>> Please use git-format-patch -M to detect renames if you send a new version
>>> of this series, it will help with review.
>> Ok, will do that in next version.
>>
>>>> include/sound/soc-dai.h | 1 +
>>>> 7 files changed, 1370 insertions(+), 1024 deletions(-)
>>>> delete mode 100644 drivers/gpu/drm/i2c/adv7511.c
>>>> create mode 100644 drivers/gpu/drm/i2c/adv7511_audio.c
>>>> create mode 100644 drivers/gpu/drm/i2c/adv7511_core.c
>>> [snip]
>>>
>>>> diff --git a/drivers/gpu/drm/i2c/adv7511_core.c
>>>> b/drivers/gpu/drm/i2c/adv7511_core.c new file mode 100644
>>>> index 0000000..d54256a
>>>> --- /dev/null
>>>> +++ b/drivers/gpu/drm/i2c/adv7511_core.c
>>> [snip]
>>>
>>>> +static int adv7511_probe(struct i2c_client *i2c, const struct
>>>> i2c_device_id *id) +{
>>>> + struct adv7511_link_config link_config;
>>>> + struct adv7511 *adv7511;
>>>> + struct device *dev = &i2c->dev;
>>>> + unsigned int val;
>>>> + int ret;
>>>> +
>>>> + if (!dev->of_node)
>>>> + return -EINVAL;
>>>> +
>>>> + adv7511 = devm_kzalloc(dev, sizeof(*adv7511), GFP_KERNEL);
>>>> + if (!adv7511)
>>>> + return -ENOMEM;
>>>> +
>>>> + adv7511->powered = false;
>>>> + adv7511->status = connector_status_disconnected;
>>>> +
>>>> + ret = adv7511_parse_dt(dev->of_node, &link_config);
>>>> + if (ret)
>>>> + return ret;
>>>> +
>>>> + /*
>>>> + * The power down GPIO is optional. If present, toggle it from active
>>>> to
>>>> + * inactive to wake up the encoder.
>>>> + */
>>>> + adv7511->gpio_pd = devm_gpiod_get_optional(dev, "pd",
> GPIOD_OUT_HIGH);
>>>> + if (IS_ERR(adv7511->gpio_pd))
>>>> + return PTR_ERR(adv7511->gpio_pd);
>>>> +
>>>> + if (adv7511->gpio_pd) {
>>>> + mdelay(5);
>>>> + gpiod_set_value_cansleep(adv7511->gpio_pd, 0);
>>>> + }
>>>> +
>>>> + adv7511->regmap = devm_regmap_init_i2c(i2c, &adv7511_regmap_config);
>>>> + if (IS_ERR(adv7511->regmap))
>>>> + return PTR_ERR(adv7511->regmap);
>>>> +
>>>> + ret = regmap_read(adv7511->regmap, ADV7511_REG_CHIP_REVISION, &val);
>>>> + if (ret)
>>>> + return ret;
>>>> + dev_dbg(dev, "Rev. %d\n", val);
>>>> +
>>>> + ret = regmap_register_patch(adv7511->regmap, adv7511_fixed_registers,
>>>> + ARRAY_SIZE(adv7511_fixed_registers));
>>>> + if (ret)
>>>> + return ret;
>>>> +
>>>> + regmap_write(adv7511->regmap, ADV7511_REG_EDID_I2C_ADDR,
>>>> edid_i2c_addr);
>>>> + regmap_write(adv7511->regmap, ADV7511_REG_PACKET_I2C_ADDR,
>>>> + packet_i2c_addr);
>>>> + regmap_write(adv7511->regmap, ADV7511_REG_CEC_I2C_ADDR,
> cec_i2c_addr);
>>>> + adv7511_packet_disable(adv7511, 0xffff);
>>>> +
>>>> + adv7511->i2c_main = i2c;
>>>> + adv7511->i2c_edid = i2c_new_dummy(i2c->adapter, edid_i2c_addr >> 1);
>>>> + if (!adv7511->i2c_edid)
>>>> + return -ENOMEM;
>>>> +
>>>> + if (i2c->irq) {
>>>> + init_waitqueue_head(&adv7511->wq);
>>>> +
>>>> + ret = devm_request_threaded_irq(dev, i2c->irq, NULL,
>>>> + adv7511_irq_handler,
>>>> + IRQF_ONESHOT, dev_name(dev),
>>>> + adv7511);
>>>> + if (ret)
>>>> + goto err_i2c_unregister_device;
>>>> + }
>>>> +
>>>> + /* CEC is unused for now */
>>>> + regmap_write(adv7511->regmap, ADV7511_REG_CEC_CTRL,
>>>> + ADV7511_CEC_CTRL_POWER_DOWN);
>>>> +
>>>> + adv7511_power_off(adv7511);
>>>> +
>>>> + i2c_set_clientdata(i2c, adv7511);
>>>> +
>>>> +#ifdef CONFIG_DRM_I2C_ADV7511_AUDIO
>>>> + adv7511_audio_init(&i2c->dev);
>>>> +#endif
>>> Shouldn't we condition this to the audio channel being somehow described
>>> in DT ? If a board doesn't route audio signals to the ADV7511 audio
>>> input, there's no need to register an audio codec.
>> I can do this but the audio is already conditionally compiled using
>> menuconfig. Is it really necessary to add this extra layer of condition?
> The idea is that enabling support for ADV7511 audio in the kernel isn't
> coupled with whether the system includes audio support. It would be confusing,
> and would also waste resources, to create a Linux sound device when no sound
> channel is routed on the board.
Ok, will do that in next version. Another question: I am facing a problem when
compiling ALSA as a module, as the ADV7511 audio is not embedded into ALSA the
compilation fails with undefined references to ALSA functions. The solution that
I am planning to use is to add a default value to the ADV7511 kconfig entry so
that the driver is compiled as module when ALSA is a module and as embedded if
ALSA is embedded. Is this okay or is there another solution without moving the
ADV7511 audio to the ALSA directory?
>
>>>> +
>>>> + adv7511_set_link_config(adv7511, &link_config);
>>>> +
>>>> + /* Enable HDMI mode */
>>>> + regmap_update_bits(adv7511->regmap, ADV7511_REG_HDCP_HDMI_CFG,
>>>> + ADV7511_HDMI_CFG_MODE_MASK,
>>>> + ADV7511_HDMI_CFG_MODE_HDMI);
>>>> +
>>>> + return 0;
>>>> +
>>>> +err_i2c_unregister_device:
>>>> + i2c_unregister_device(adv7511->i2c_edid);
>>>> +
>>>> + return ret;
>>>> +}
Best regards,
Jose Miguel Abreu
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