[PATCH v5 69/80] drm/vc4: hdmi: Deal with multiple ALSA cards

[Maxime Ripard]

The HDMI driver was registering a single ALSA card so far with the name
vc4-hdmi.

Obviously, this is not going to work anymore when we will have multiple
HDMI controllers since we will end up trying to register two files with the
same name.

Let's use the variant to avoid that name conflict.

Reviewed-by: Dave Stevenson <dave.stevenson@xxxxxxxxxxxxxxx>
Tested-by: Chanwoo Choi <cw00.choi@xxxxxxxxxxx>
Tested-by: Hoegeun Kwon <hoegeun.kwon@xxxxxxxxxxx>
Tested-by: Stefan Wahren <stefan.wahren@xxxxxxxx>
Signed-off-by: Maxime Ripard <maxime@xxxxxxxxxx>
---
 drivers/gpu/drm/vc4/vc4_hdmi.c | 3 ++-
 drivers/gpu/drm/vc4/vc4_hdmi.h | 3 +++
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/vc4/vc4_hdmi.c b/drivers/gpu/drm/vc4/vc4_hdmi.c
index 20cfc85449ca..5e479647559f 100644
--- a/drivers/gpu/drm/vc4/vc4_hdmi.c
+++ b/drivers/gpu/drm/vc4/vc4_hdmi.c
@@ -1043,7 +1043,7 @@ 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->name = vc4_hdmi->variant->card_name;
 	card->dev = dev;
 
 	/*
@@ -1502,6 +1502,7 @@ 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",
+	.card_name		= "vc4-hdmi",
 	.max_pixel_clock	= 162000000,
 	.cec_available		= true,
 	.registers		= vc4_hdmi_fields,
diff --git a/drivers/gpu/drm/vc4/vc4_hdmi.h b/drivers/gpu/drm/vc4/vc4_hdmi.h
index 4aea5ee8a91d..34138e0dd4a6 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;
 
+	/* ALSA card name */
+	const char *card_name;
+
 	/* Filename to expose the registers in debugfs */
 	const char *debugfs_name;
 
-- 
git-series 0.9.1