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Diffstat (limited to 'target/linux/bcm27xx/patches-5.4/950-0318-Rename-HDMI-ALSA-device-names-check-for-enable-state.patch')
-rw-r--r--target/linux/bcm27xx/patches-5.4/950-0318-Rename-HDMI-ALSA-device-names-check-for-enable-state.patch139
1 files changed, 139 insertions, 0 deletions
diff --git a/target/linux/bcm27xx/patches-5.4/950-0318-Rename-HDMI-ALSA-device-names-check-for-enable-state.patch b/target/linux/bcm27xx/patches-5.4/950-0318-Rename-HDMI-ALSA-device-names-check-for-enable-state.patch
new file mode 100644
index 0000000000..8ec836621d
--- /dev/null
+++ b/target/linux/bcm27xx/patches-5.4/950-0318-Rename-HDMI-ALSA-device-names-check-for-enable-state.patch
@@ -0,0 +1,139 @@
+From 95709d5c58c57f31a70e96fe9ebb8d34c046f877 Mon Sep 17 00:00:00 2001
+From: James Hughes <james.hughes@raspberrypi.org>
+Date: Tue, 24 Sep 2019 18:26:55 +0100
+Subject: [PATCH] Rename HDMI ALSA device names, check for enable state
+
+HDMI Alsa devices renamed to match names used by DRM, to
+HDMI 1 and HDMI 2
+
+Check for which HDMI devices are connected and only create
+devices for those that are present.
+
+The rename of the devices might cause some backwards compatibility
+issues, but since this particular part of the driver needs to be
+specifically enabled, I suspect the number of people who will see
+the problem will be very small.
+
+Signed-off-by: James Hughes <james.hughes@raspberrypi.org>
+---
+ .../vc04_services/bcm2835-audio/bcm2835.c | 70 +++++++++++++++++--
+ 1 file changed, 63 insertions(+), 7 deletions(-)
+
+--- a/drivers/staging/vc04_services/bcm2835-audio/bcm2835.c
++++ b/drivers/staging/vc04_services/bcm2835-audio/bcm2835.c
+@@ -9,8 +9,9 @@
+ #include <linux/of.h>
+
+ #include "bcm2835.h"
++#include <soc/bcm2835/raspberrypi-firmware.h>
+
+-static bool enable_hdmi;
++static bool enable_hdmi, enable_hdmi0, enable_hdmi1;
+ static bool enable_headphones;
+ static bool enable_compat_alsa = true;
+
+@@ -115,8 +116,8 @@ static struct bcm2835_audio_driver bcm28
+ .name = "bcm2835_hdmi",
+ .owner = THIS_MODULE,
+ },
+- .shortname = "bcm2835 HDMI",
+- .longname = "bcm2835 HDMI",
++ .shortname = "bcm2835 HDMI 1",
++ .longname = "bcm2835 HDMI 1",
+ .minchannels = 1,
+ .newpcm = bcm2835_audio_simple_newpcm,
+ .newctl = snd_bcm2835_new_hdmi_ctl,
+@@ -128,8 +129,8 @@ static struct bcm2835_audio_driver bcm28
+ .name = "bcm2835_hdmi",
+ .owner = THIS_MODULE,
+ },
+- .shortname = "bcm2835 HDMI 1",
+- .longname = "bcm2835 HDMI 1",
++ .shortname = "bcm2835 HDMI 2",
++ .longname = "bcm2835 HDMI 2",
+ .minchannels = 1,
+ .newpcm = bcm2835_audio_simple_newpcm,
+ .newctl = snd_bcm2835_new_hdmi_ctl,
+@@ -161,11 +162,11 @@ static struct bcm2835_audio_drivers chil
+ },
+ {
+ .audio_driver = &bcm2835_audio_hdmi0,
+- .is_enabled = &enable_hdmi,
++ .is_enabled = &enable_hdmi0,
+ },
+ {
+ .audio_driver = &bcm2835_audio_hdmi1,
+- .is_enabled = &enable_hdmi,
++ .is_enabled = &enable_hdmi1,
+ },
+ {
+ .audio_driver = &bcm2835_audio_headphones,
+@@ -312,6 +313,53 @@ static int snd_add_child_devices(struct
+ return 0;
+ }
+
++static void set_hdmi_enables(struct device *dev)
++{
++ struct device_node *firmware_node;
++ struct rpi_firmware *firmware;
++ u32 num_displays, i, display_id;
++ int ret;
++
++ firmware_node = of_parse_phandle(dev->of_node, "brcm,firmware", 0);
++ firmware = rpi_firmware_get(firmware_node);
++
++ if (!firmware)
++ return;
++
++ of_node_put(firmware_node);
++
++ ret = rpi_firmware_property(firmware,
++ RPI_FIRMWARE_FRAMEBUFFER_GET_NUM_DISPLAYS,
++ &num_displays, sizeof(u32));
++
++ if (ret)
++ return;
++
++ for (i = 0; i < num_displays; i++) {
++ display_id = i;
++ ret = rpi_firmware_property(firmware,
++ RPI_FIRMWARE_FRAMEBUFFER_GET_DISPLAY_ID,
++ &display_id, sizeof(display_id));
++ if (!ret) {
++ if (display_id == 2)
++ enable_hdmi0 = true;
++ if (display_id == 7)
++ enable_hdmi1 = true;
++ }
++ }
++
++ if (!enable_hdmi0 && enable_hdmi1) {
++ /* Swap them over and reassign route. This means
++ * that if we only have one connected, it is always named
++ * HDMI1, irrespective of if its on port HDMI0 or HDMI1.
++ * This should match with the naming of HDMI ports in DRM
++ */
++ enable_hdmi0 = true;
++ enable_hdmi1 = false;
++ bcm2835_audio_hdmi0.route = AUDIO_DEST_HDMI1;
++ }
++}
++
+ static int snd_bcm2835_alsa_probe(struct platform_device *pdev)
+ {
+ struct device *dev = &pdev->dev;
+@@ -332,6 +380,14 @@ static int snd_bcm2835_alsa_probe(struct
+ numchans);
+ }
+
++ if (!enable_compat_alsa) {
++ set_hdmi_enables(dev);
++ // In this mode, always enable analog output
++ enable_headphones = true;
++ } else {
++ enable_hdmi0 = enable_hdmi;
++ }
++
+ err = bcm2835_devm_add_vchi_ctx(dev);
+ if (err)
+ return err;