Hi Maxime,
Am 24.04.20 um 17:35 schrieb Maxime Ripard:
> The HDMI driver was registering a single debugfs file so far with the name
> hdmi_regs.
>
> Obviously, this is not going to work anymore when will have multiple HDMI
> controllers since we will end up trying to register two files with the same
> name.
>
> Let's use the ID to avoid that name conflict.
even with this patch there is a name conflict in debugfs using Linux
5.7-rc1. Dave Stevenson addressed this by using different card names
[1]. Since this patch won't apply anymore here is my suggestion:
diff --git a/drivers/gpu/drm/vc4/vc4_hdmi.c b/drivers/gpu/drm/vc4/vc4_hdmi.c
index 29287ab..7209397 100644
--- a/drivers/gpu/drm/vc4/vc4_hdmi.c
+++ b/drivers/gpu/drm/vc4/vc4_hdmi.c
@@ -1181,9 +1181,14 @@ static int vc4_hdmi_audio_init(struct vc4_hdmi
*vc4_hdmi)
card->dai_link = dai_link;
card->num_links = 1;
- card->name = "vc4-hdmi";
card->dev = dev;
+ if (vc4_hdmi->variant->encoder_type == VC4_ENCODER_TYPE_HDMI1) {
+ card->name = "vc4-hdmi1";
+ } else {
+ card->name = "vc4-hdmi";
+ }
+
/*
* Be careful, snd_soc_register_card() calls dev_set_drvdata() and
* stores a pointer to the snd card object in dev->driver_data. This
--
2.7.4
[1] -
https://github.com/raspberrypi/linux/pull/3515/commits/82fe6c16811e5acc9bdbbf298db1b30f84b820d2
>
> Signed-off-by: Maxime Ripard <maxime@xxxxxxxxxx>
> ---
> drivers/gpu/drm/vc4/vc4_hdmi.c | 5 ++++-
> drivers/gpu/drm/vc4/vc4_hdmi.h | 3 +++
> 2 files changed, 7 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/vc4/vc4_hdmi.c b/drivers/gpu/drm/vc4/vc4_hdmi.c
> index aaf96420d0ec..aae5b10a2d11 100644
> --- a/drivers/gpu/drm/vc4/vc4_hdmi.c
> +++ b/drivers/gpu/drm/vc4/vc4_hdmi.c
> @@ -1377,7 +1377,9 @@ static int vc4_hdmi_bind(struct device *dev, struct device *master, void *data)
> if (ret)
> goto err_destroy_encoder;
>
> - vc4_debugfs_add_file(drm, "hdmi_regs", vc4_hdmi_debugfs_regs, vc4_hdmi);
> + vc4_debugfs_add_file(drm, variant->debugfs_name,
> + vc4_hdmi_debugfs_regs,
> + vc4_hdmi);
>
> return 0;
>
> @@ -1439,6 +1441,7 @@ static int vc4_hdmi_dev_remove(struct platform_device *pdev)
>
> static const struct vc4_hdmi_variant bcm2835_variant = {
> .encoder_type = VC4_ENCODER_TYPE_HDMI0,
> + .debugfs_name = "hdmi_regs",
> .registers = vc4_hdmi_fields,
> .num_registers = ARRAY_SIZE(vc4_hdmi_fields),
>
> diff --git a/drivers/gpu/drm/vc4/vc4_hdmi.h b/drivers/gpu/drm/vc4/vc4_hdmi.h
> index 4240c5ea7fde..22100820c81b 100644
> --- a/drivers/gpu/drm/vc4/vc4_hdmi.h
> +++ b/drivers/gpu/drm/vc4/vc4_hdmi.h
> @@ -30,6 +30,9 @@ struct vc4_hdmi_variant {
> /* Encoder Type for that controller */
> enum vc4_encoder_type encoder_type;
>
> + /* Filename to expose the registers in debugfs */
> + const char *debugfs_name;
> +
> /* List of the registers available on that variant */
> const struct vc4_hdmi_register *registers;
>
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