From 094864bd0054ea831b573f733cf2a5a0741f7cb5 Mon Sep 17 00:00:00 2001 From: Dave Stevenson Date: Thu, 3 Sep 2020 10:01:37 +0200 Subject: [PATCH] drm/vc4: hdmi: Use reg-names to retrieve the HDMI audio registers The register range used for audio setup in the previous generations of SoC were always the second range in the device tree. However, now that the BCM2711 has way more register ranges, it makes sense to retrieve it by names for it, while preserving the id-based lookup as a fallback. Signed-off-by: Dave Stevenson Signed-off-by: Maxime Ripard Tested-by: Chanwoo Choi Tested-by: Hoegeun Kwon Tested-by: Stefan Wahren Link: https://patchwork.freedesktop.org/patch/msgid/a1ba5605fe1006a1ead5262ef3d66ea5d0750381.1599120059.git-series.maxime@cerno.tech --- drivers/gpu/drm/vc4/vc4_hdmi.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/vc4/vc4_hdmi.c b/drivers/gpu/drm/vc4/vc4_hdmi.c index 487c04d..53c3b5a 100644 --- a/drivers/gpu/drm/vc4/vc4_hdmi.c +++ b/drivers/gpu/drm/vc4/vc4_hdmi.c @@ -953,6 +953,7 @@ static int vc4_hdmi_audio_init(struct vc4_hdmi *vc4_hdmi) struct snd_soc_card *card = &vc4_hdmi->audio.card; struct device *dev = &vc4_hdmi->pdev->dev; const __be32 *addr; + int index; int ret; if (!of_find_property(dev->of_node, "dmas", NULL)) { @@ -973,7 +974,13 @@ static int vc4_hdmi_audio_init(struct vc4_hdmi *vc4_hdmi) * for DMA transfers. * This VC/MMU should probably be exposed to avoid this kind of hacks. */ - addr = of_get_address(dev->of_node, 1, NULL, NULL); + index = of_property_match_string(dev->of_node, "reg-names", "hd"); + /* Before BCM2711, we don't have a named register range */ + if (index < 0) + index = 1; + + addr = of_get_address(dev->of_node, index, NULL, NULL); + vc4_hdmi->audio.dma_data.addr = be32_to_cpup(addr) + mai_data->offset; vc4_hdmi->audio.dma_data.addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES; vc4_hdmi->audio.dma_data.maxburst = 2; -- 2.7.4