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openwrtv4/target/linux/brcm2708/patches-4.4/0131-bcm2835-always-use-2-4-8-channels-for-multichannel-l.patch

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brcm2708: update linux 4.4 patches to latest version As usual these patches were extracted and rebased from the raspberry pi repo: https://github.com/raspberrypi/linux/tree/rpi-4.4.y Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
2016-12-02 10:50:26 +00:00
From 895025420b369c66ed590356ebfd0b787572956a Mon Sep 17 00:00:00 2001
brcm2708: switch to linux 4.4 and update patches As usual these patches were extracted from: https://github.com/raspberrypi/linux/commits/rpi-4.4.y Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com> SVN-Revision: 48765
2016-02-25 10:14:01 +00:00
From: wm4 <wm4@nowhere>
Date: Wed, 13 Jan 2016 19:44:03 +0100
brcm2708: update linux 4.4 patches to latest version As usual these patches were extracted and rebased from the raspberry pi repo: https://github.com/raspberrypi/linux/tree/rpi-4.4.y Also adds support for Raspberry Pi Compute Module 3 (untested). Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
2016-09-10 12:54:26 +00:00
Subject: [PATCH] bcm2835: always use 2/4/8 channels for multichannel layouts
brcm2708: switch to linux 4.4 and update patches As usual these patches were extracted from: https://github.com/raspberrypi/linux/commits/rpi-4.4.y Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com> SVN-Revision: 48765
2016-02-25 10:14:01 +00:00
Pad the unused channels with NA. This means userspace needs to write
additional, silent padding channels, which is not ideal, but better
than noise.
Works around noise at the following channel counts: 3, 5, 6, 7
---
sound/arm/bcm2835-ctl.c | 89 +++++++++++++++++++++++++------------------------
1 file changed, 45 insertions(+), 44 deletions(-)
--- a/sound/arm/bcm2835-ctl.c
+++ b/sound/arm/bcm2835-ctl.c
@@ -349,6 +349,7 @@ struct cea_channel_speaker_allocation {
#define FRW SNDRV_CHMAP_FRW
#define TC SNDRV_CHMAP_TC
#define FCH SNDRV_CHMAP_TFC
+#define NA SNDRV_CHMAP_NA
/*
* CEA-861 channel maps
@@ -356,69 +357,69 @@ struct cea_channel_speaker_allocation {
* Stolen from sound/pci/hda/patch_hdmi.c
* (unlike the source, this uses SNDRV_* constants directly, as by the
* map_tables array in patch_hdmi.c)
- * Unknown entries use 0, which unfortunately is SNDRV_CHMAP_UNKNOWN instead
- * of SNDRV_CHMAP_NA.
+ * Entries which do not have a physical output channel use 0. Entries which
+ * require userspace to output silence use NA (SNDRV_CHMAP_NA).
*/
static struct cea_channel_speaker_allocation channel_allocations[] = {
/* channel: 7 6 5 4 3 2 1 0 */
{ .ca_index = 0x00, .speakers = { 0, 0, 0, 0, 0, 0, FR, FL } },
/* 2.1 */
-{ .ca_index = 0x01, .speakers = { 0, 0, 0, 0, 0, LFE, FR, FL } },
+{ .ca_index = 0x01, .speakers = { 0, 0, 0, 0, NA, LFE, FR, FL } },
/* Dolby Surround */
-{ .ca_index = 0x02, .speakers = { 0, 0, 0, 0, FC, 0, FR, FL } },
+{ .ca_index = 0x02, .speakers = { 0, 0, 0, 0, FC, NA, FR, FL } },
/* surround40 */
-{ .ca_index = 0x08, .speakers = { 0, 0, RR, RL, 0, 0, FR, FL } },
+{ .ca_index = 0x08, .speakers = { NA, NA, RR, RL, NA, NA, FR, FL } },
/* surround41 */
-{ .ca_index = 0x09, .speakers = { 0, 0, RR, RL, 0, LFE, FR, FL } },
+{ .ca_index = 0x09, .speakers = { NA, NA, RR, RL, NA, LFE, FR, FL } },
/* surround50 */
-{ .ca_index = 0x0a, .speakers = { 0, 0, RR, RL, FC, 0, FR, FL } },
+{ .ca_index = 0x0a, .speakers = { NA, NA, RR, RL, FC, NA, FR, FL } },
/* surround51 */
-{ .ca_index = 0x0b, .speakers = { 0, 0, RR, RL, FC, LFE, FR, FL } },
+{ .ca_index = 0x0b, .speakers = { NA, NA, RR, RL, FC, LFE, FR, FL } },
/* 6.1 */
-{ .ca_index = 0x0f, .speakers = { 0, RC, RR, RL, FC, LFE, FR, FL } },
+{ .ca_index = 0x0f, .speakers = { NA, RC, RR, RL, FC, LFE, FR, FL } },
/* surround71 */
{ .ca_index = 0x13, .speakers = { RRC, RLC, RR, RL, FC, LFE, FR, FL } },
-{ .ca_index = 0x03, .speakers = { 0, 0, 0, 0, FC, LFE, FR, FL } },
-{ .ca_index = 0x04, .speakers = { 0, 0, 0, RC, 0, 0, FR, FL } },
-{ .ca_index = 0x05, .speakers = { 0, 0, 0, RC, 0, LFE, FR, FL } },
-{ .ca_index = 0x06, .speakers = { 0, 0, 0, RC, FC, 0, FR, FL } },
-{ .ca_index = 0x07, .speakers = { 0, 0, 0, RC, FC, LFE, FR, FL } },
-{ .ca_index = 0x0c, .speakers = { 0, RC, RR, RL, 0, 0, FR, FL } },
-{ .ca_index = 0x0d, .speakers = { 0, RC, RR, RL, 0, LFE, FR, FL } },
-{ .ca_index = 0x0e, .speakers = { 0, RC, RR, RL, FC, 0, FR, FL } },
-{ .ca_index = 0x10, .speakers = { RRC, RLC, RR, RL, 0, 0, FR, FL } },
-{ .ca_index = 0x11, .speakers = { RRC, RLC, RR, RL, 0, LFE, FR, FL } },
-{ .ca_index = 0x12, .speakers = { RRC, RLC, RR, RL, FC, 0, FR, FL } },
-{ .ca_index = 0x14, .speakers = { FRC, FLC, 0, 0, 0, 0, FR, FL } },
-{ .ca_index = 0x15, .speakers = { FRC, FLC, 0, 0, 0, LFE, FR, FL } },
-{ .ca_index = 0x16, .speakers = { FRC, FLC, 0, 0, FC, 0, FR, FL } },
-{ .ca_index = 0x17, .speakers = { FRC, FLC, 0, 0, FC, LFE, FR, FL } },
-{ .ca_index = 0x18, .speakers = { FRC, FLC, 0, RC, 0, 0, FR, FL } },
-{ .ca_index = 0x19, .speakers = { FRC, FLC, 0, RC, 0, LFE, FR, FL } },
-{ .ca_index = 0x1a, .speakers = { FRC, FLC, 0, RC, FC, 0, FR, FL } },
-{ .ca_index = 0x1b, .speakers = { FRC, FLC, 0, RC, FC, LFE, FR, FL } },
-{ .ca_index = 0x1c, .speakers = { FRC, FLC, RR, RL, 0, 0, FR, FL } },
-{ .ca_index = 0x1d, .speakers = { FRC, FLC, RR, RL, 0, LFE, FR, FL } },
-{ .ca_index = 0x1e, .speakers = { FRC, FLC, RR, RL, FC, 0, FR, FL } },
+{ .ca_index = 0x03, .speakers = { NA, NA, NA, NA, FC, LFE, FR, FL } },
+{ .ca_index = 0x04, .speakers = { NA, NA, NA, RC, NA, NA, FR, FL } },
+{ .ca_index = 0x05, .speakers = { NA, NA, NA, RC, NA, LFE, FR, FL } },
+{ .ca_index = 0x06, .speakers = { NA, NA, NA, RC, FC, NA, FR, FL } },
+{ .ca_index = 0x07, .speakers = { NA, NA, NA, RC, FC, LFE, FR, FL } },
+{ .ca_index = 0x0c, .speakers = { NA, RC, RR, RL, NA, NA, FR, FL } },
+{ .ca_index = 0x0d, .speakers = { NA, RC, RR, RL, NA, LFE, FR, FL } },
+{ .ca_index = 0x0e, .speakers = { NA, RC, RR, RL, FC, NA, FR, FL } },
+{ .ca_index = 0x10, .speakers = { RRC, RLC, RR, RL, NA, NA, FR, FL } },
+{ .ca_index = 0x11, .speakers = { RRC, RLC, RR, RL, NA, LFE, FR, FL } },
+{ .ca_index = 0x12, .speakers = { RRC, RLC, RR, RL, FC, NA, FR, FL } },
+{ .ca_index = 0x14, .speakers = { FRC, FLC, NA, NA, NA, NA, FR, FL } },
+{ .ca_index = 0x15, .speakers = { FRC, FLC, NA, NA, NA, LFE, FR, FL } },
+{ .ca_index = 0x16, .speakers = { FRC, FLC, NA, NA, FC, NA, FR, FL } },
+{ .ca_index = 0x17, .speakers = { FRC, FLC, NA, NA, FC, LFE, FR, FL } },
+{ .ca_index = 0x18, .speakers = { FRC, FLC, NA, RC, NA, NA, FR, FL } },
+{ .ca_index = 0x19, .speakers = { FRC, FLC, NA, RC, NA, LFE, FR, FL } },
+{ .ca_index = 0x1a, .speakers = { FRC, FLC, NA, RC, FC, NA, FR, FL } },
+{ .ca_index = 0x1b, .speakers = { FRC, FLC, NA, RC, FC, LFE, FR, FL } },
+{ .ca_index = 0x1c, .speakers = { FRC, FLC, RR, RL, NA, NA, FR, FL } },
+{ .ca_index = 0x1d, .speakers = { FRC, FLC, RR, RL, NA, LFE, FR, FL } },
+{ .ca_index = 0x1e, .speakers = { FRC, FLC, RR, RL, FC, NA, FR, FL } },
{ .ca_index = 0x1f, .speakers = { FRC, FLC, RR, RL, FC, LFE, FR, FL } },
-{ .ca_index = 0x20, .speakers = { 0, FCH, RR, RL, FC, 0, FR, FL } },
-{ .ca_index = 0x21, .speakers = { 0, FCH, RR, RL, FC, LFE, FR, FL } },
-{ .ca_index = 0x22, .speakers = { TC, 0, RR, RL, FC, 0, FR, FL } },
-{ .ca_index = 0x23, .speakers = { TC, 0, RR, RL, FC, LFE, FR, FL } },
-{ .ca_index = 0x24, .speakers = { FRH, FLH, RR, RL, 0, 0, FR, FL } },
-{ .ca_index = 0x25, .speakers = { FRH, FLH, RR, RL, 0, LFE, FR, FL } },
-{ .ca_index = 0x26, .speakers = { FRW, FLW, RR, RL, 0, 0, FR, FL } },
-{ .ca_index = 0x27, .speakers = { FRW, FLW, RR, RL, 0, LFE, FR, FL } },
-{ .ca_index = 0x28, .speakers = { TC, RC, RR, RL, FC, 0, FR, FL } },
+{ .ca_index = 0x20, .speakers = { NA, FCH, RR, RL, FC, NA, FR, FL } },
+{ .ca_index = 0x21, .speakers = { NA, FCH, RR, RL, FC, LFE, FR, FL } },
+{ .ca_index = 0x22, .speakers = { TC, NA, RR, RL, FC, NA, FR, FL } },
+{ .ca_index = 0x23, .speakers = { TC, NA, RR, RL, FC, LFE, FR, FL } },
+{ .ca_index = 0x24, .speakers = { FRH, FLH, RR, RL, NA, NA, FR, FL } },
+{ .ca_index = 0x25, .speakers = { FRH, FLH, RR, RL, NA, LFE, FR, FL } },
+{ .ca_index = 0x26, .speakers = { FRW, FLW, RR, RL, NA, NA, FR, FL } },
+{ .ca_index = 0x27, .speakers = { FRW, FLW, RR, RL, NA, LFE, FR, FL } },
+{ .ca_index = 0x28, .speakers = { TC, RC, RR, RL, FC, NA, FR, FL } },
{ .ca_index = 0x29, .speakers = { TC, RC, RR, RL, FC, LFE, FR, FL } },
-{ .ca_index = 0x2a, .speakers = { FCH, RC, RR, RL, FC, 0, FR, FL } },
+{ .ca_index = 0x2a, .speakers = { FCH, RC, RR, RL, FC, NA, FR, FL } },
{ .ca_index = 0x2b, .speakers = { FCH, RC, RR, RL, FC, LFE, FR, FL } },
-{ .ca_index = 0x2c, .speakers = { TC, FCH, RR, RL, FC, 0, FR, FL } },
+{ .ca_index = 0x2c, .speakers = { TC, FCH, RR, RL, FC, NA, FR, FL } },
{ .ca_index = 0x2d, .speakers = { TC, FCH, RR, RL, FC, LFE, FR, FL } },
-{ .ca_index = 0x2e, .speakers = { FRH, FLH, RR, RL, FC, 0, FR, FL } },
+{ .ca_index = 0x2e, .speakers = { FRH, FLH, RR, RL, FC, NA, FR, FL } },
{ .ca_index = 0x2f, .speakers = { FRH, FLH, RR, RL, FC, LFE, FR, FL } },
-{ .ca_index = 0x30, .speakers = { FRW, FLW, RR, RL, FC, 0, FR, FL } },
+{ .ca_index = 0x30, .speakers = { FRW, FLW, RR, RL, FC, NA, FR, FL } },
{ .ca_index = 0x31, .speakers = { FRW, FLW, RR, RL, FC, LFE, FR, FL } },
};
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