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36 lines
1.3 KiB
Diff
36 lines
1.3 KiB
Diff
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From 7a463d59a0539cdf79ee6f1fe6c52f0a487ee63e Mon Sep 17 00:00:00 2001
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From: Dave Stevenson <dave.stevenson@raspberrypi.com>
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Date: Wed, 25 Mar 2020 18:11:41 +0000
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Subject: [PATCH] drm/vc4: Use reg-names to configure HDMI audio.
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HDMI audio configuration was using fixed index numbers to
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load in DT register settings.
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Switch to using reg-names for flexibility and to match Pi4.
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Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
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---
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drivers/gpu/drm/vc4/vc4_hdmi.c | 5 ++++-
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1 file changed, 4 insertions(+), 1 deletion(-)
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--- a/drivers/gpu/drm/vc4/vc4_hdmi.c
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+++ b/drivers/gpu/drm/vc4/vc4_hdmi.c
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@@ -1097,6 +1097,7 @@ static int vc4_hdmi_audio_init(struct vc
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struct snd_soc_card *card = &vc4_hdmi->audio.card;
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struct device *dev = &vc4_hdmi->pdev->dev;
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const __be32 *addr;
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+ int index;
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int ret;
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int len;
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@@ -1122,7 +1123,9 @@ static int vc4_hdmi_audio_init(struct vc
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* for DMA transfers.
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* This VC/MMU should probably be exposed to avoid this kind of hacks.
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*/
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- addr = of_get_address(dev->of_node, 1, NULL, NULL);
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+ index = of_property_match_string(dev->of_node, "reg-names", "hd");
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+ addr = of_get_address(dev->of_node, index, NULL, NULL);
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+
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vc4_hdmi->audio.dma_data.addr = be32_to_cpup(addr) + mai_data->offset;
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vc4_hdmi->audio.dma_data.addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
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vc4_hdmi->audio.dma_data.maxburst = 2;
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