bcm27xx: import latest patches from the RPi foundation

bcm2708: boot tested on RPi B+ v1.2
bcm2709: boot tested on RPi 3B v1.2 and RPi 4B v1.1 4G
bcm2710: boot tested on RPi 3B v1.2
bcm2711: boot tested on RPi 4B v1.1 4G

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>

1 files changed, 124 insertions, 0 deletions

diff --git a/target/linux/bcm27xx/patches-5.4/950-0891-vc4_hdmi-Set-HDMI_MAI_FMT.patch b/target/linux/bcm27xx/patches-5.4/950-0891-vc4_hdmi-Set-HDMI_MAI_FMT.patch
new file mode 100644
index 0000000000..2c305a0bff
--- /dev/null
+++ b/target/linux/bcm27xx/patches-5.4/950-0891-vc4_hdmi-Set-HDMI_MAI_FMT.patch
@@ -0,0 +1,124 @@
+From c9ba62745ba17d21542db28bf7dc28a39e19f7c2 Mon Sep 17 00:00:00 2001
+From: popcornmix <popcornmix@gmail.com>
+Date: Tue, 10 Mar 2020 22:21:15 +0000
+Subject: [PATCH] vc4_hdmi: Set HDMI_MAI_FMT
+
+The hardware uses this for generating the right audio
+data island packets when using formats other than PCM
+
+Signed-off-by: Dom Cobley <popcornmix@gmail.com>
+---
+ drivers/gpu/drm/vc4/vc4_hdmi.c | 47 ++++++++++++++++++++++++++++++++++
+ drivers/gpu/drm/vc4/vc4_regs.h | 31 ++++++++++++++++++++++
+ 2 files changed, 78 insertions(+)
+
+--- a/drivers/gpu/drm/vc4/vc4_hdmi.c
++++ b/drivers/gpu/drm/vc4/vc4_hdmi.c
+@@ -917,6 +917,45 @@ static void vc4_hdmi_audio_shutdown(stru
+ 	vc4_hdmi->audio.substream = NULL;
+ }
+ 
++static int sample_rate_to_mai_fmt(int samplerate)
++{
++   switch(samplerate)
++   {
++      case 8000:
++         return VC4_HDMI_MAI_SAMPLE_RATE_8000;
++      case 11025:
++         return VC4_HDMI_MAI_SAMPLE_RATE_11025;
++      case 12000:
++         return VC4_HDMI_MAI_SAMPLE_RATE_12000;
++      case 16000:
++         return VC4_HDMI_MAI_SAMPLE_RATE_16000;
++      case 22050:
++         return VC4_HDMI_MAI_SAMPLE_RATE_22050;
++      case 24000:
++         return VC4_HDMI_MAI_SAMPLE_RATE_24000;
++      case 32000:
++         return VC4_HDMI_MAI_SAMPLE_RATE_32000;
++      case 44100:
++         return VC4_HDMI_MAI_SAMPLE_RATE_44100;
++      case 48000:
++         return VC4_HDMI_MAI_SAMPLE_RATE_48000;
++      case 64000:
++         return VC4_HDMI_MAI_SAMPLE_RATE_64000;
++      case 88200:
++         return VC4_HDMI_MAI_SAMPLE_RATE_88200;
++      case 96000:
++         return VC4_HDMI_MAI_SAMPLE_RATE_96000;
++      case 128000:
++         return VC4_HDMI_MAI_SAMPLE_RATE_128000;
++      case 176400:
++         return VC4_HDMI_MAI_SAMPLE_RATE_176400;
++      case 192000:
++         return VC4_HDMI_MAI_SAMPLE_RATE_192000;
++      default:
++         return VC4_HDMI_MAI_SAMPLE_RATE_NOT_INDICATED;
++   }
++}
++
+ /* HDMI audio codec callbacks */
+ static int vc4_hdmi_audio_hw_params(struct snd_pcm_substream *substream,
+ 				    struct snd_pcm_hw_params *params,
+@@ -926,6 +965,8 @@ static int vc4_hdmi_audio_hw_params(stru
+ 	struct device *dev = &vc4_hdmi->pdev->dev;
+ 	u32 audio_packet_config, channel_mask;
+ 	u32 channel_map;
++	u32 mai_audio_format;
++	u32 mai_sample_rate;
+ 
+ 	if (substream != vc4_hdmi->audio.substream)
+ 		return -EINVAL;
+@@ -946,6 +987,12 @@ static int vc4_hdmi_audio_hw_params(stru
+ 
+ 	vc4_hdmi_audio_set_mai_clock(vc4_hdmi);
+ 
++	mai_sample_rate = sample_rate_to_mai_fmt(vc4_hdmi->audio.samplerate);
++	mai_audio_format = VC4_HDMI_MAI_FORMAT_PCM;
++	HDMI_WRITE(HDMI_MAI_FMT,
++		VC4_SET_FIELD(mai_sample_rate, VC4_HDMI_MAI_FORMAT_SAMPLE_RATE) |
++		VC4_SET_FIELD(mai_audio_format, VC4_HDMI_MAI_FORMAT_AUDIO_FORMAT));
++
+ 	/* The B frame identifier should match the value used by alsa-lib (8) */
+ 	audio_packet_config =
+ 		VC4_HDMI_AUDIO_PACKET_ZERO_DATA_ON_SAMPLE_FLAT |
+--- a/drivers/gpu/drm/vc4/vc4_regs.h
++++ b/drivers/gpu/drm/vc4/vc4_regs.h
+@@ -516,6 +516,37 @@
+ # define VC4_HDMI_AUDIO_PACKET_CEA_MASK_MASK			VC4_MASK(7, 0)
+ # define VC4_HDMI_AUDIO_PACKET_CEA_MASK_SHIFT			0
+ 
++
++# define VC4_HDMI_MAI_FORMAT_AUDIO_FORMAT_MASK		VC4_MASK(23, 16)
++# define VC4_HDMI_MAI_FORMAT_AUDIO_FORMAT_SHIFT		16
++
++enum {
++	VC4_HDMI_MAI_FORMAT_PCM = 2,
++	VC4_HDMI_MAI_FORMAT_HBR = 200,
++};
++
++# define VC4_HDMI_MAI_FORMAT_SAMPLE_RATE_MASK		VC4_MASK(15, 8)
++# define VC4_HDMI_MAI_FORMAT_SAMPLE_RATE_SHIFT		8
++
++enum {
++	VC4_HDMI_MAI_SAMPLE_RATE_NOT_INDICATED = 0,
++	VC4_HDMI_MAI_SAMPLE_RATE_8000 = 1,
++	VC4_HDMI_MAI_SAMPLE_RATE_11025 = 2,
++	VC4_HDMI_MAI_SAMPLE_RATE_12000 = 3,
++	VC4_HDMI_MAI_SAMPLE_RATE_16000 = 4,
++	VC4_HDMI_MAI_SAMPLE_RATE_22050 = 5,
++	VC4_HDMI_MAI_SAMPLE_RATE_24000 = 6,
++	VC4_HDMI_MAI_SAMPLE_RATE_32000 = 7,
++	VC4_HDMI_MAI_SAMPLE_RATE_44100 = 8,
++	VC4_HDMI_MAI_SAMPLE_RATE_48000 = 9,
++	VC4_HDMI_MAI_SAMPLE_RATE_64000 = 10,
++	VC4_HDMI_MAI_SAMPLE_RATE_88200 = 11,
++	VC4_HDMI_MAI_SAMPLE_RATE_96000 = 12,
++	VC4_HDMI_MAI_SAMPLE_RATE_128000 = 13,
++	VC4_HDMI_MAI_SAMPLE_RATE_176400 = 14,
++	VC4_HDMI_MAI_SAMPLE_RATE_192000 = 15,
++};
++
+ # define VC4_HDMI_RAM_PACKET_ENABLE		BIT(16)
+ 
+ /* When set, the CTS_PERIOD counts based on MAI bus sync pulse instead