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Date: Wed, 7 Jan 2015 10:10:49 +0100
From: Jean-Francois Moine <moinejf@...e.fr>
To: Mark Brown <broonie@...nel.org>,
Russell King - ARM Linux <linux@....linux.org.uk>
Cc: Dave Airlie <airlied@...il.com>,
Andrew Jackson <Andrew.Jackson@....com>,
Jyri Sarha <jsarha@...com>, alsa-devel@...a-project.org,
devicetree@...r.kernel.org, dri-devel@...ts.freedesktop.org,
linux-kernel@...r.kernel.org
Subject: [PATCH v9 1/4] drm/i2c: tda998x: Add DT support for audio
This patch permits the definition of the audio ports from the device tree.
Signed-off-by: Jean-Francois Moine <moinejf@...e.fr>
---
.../devicetree/bindings/drm/i2c/tda998x.txt | 18 +++++++
drivers/gpu/drm/i2c/tda998x_drv.c | 60 ++++++++++++++++++----
2 files changed, 69 insertions(+), 9 deletions(-)
diff --git a/Documentation/devicetree/bindings/drm/i2c/tda998x.txt b/Documentation/devicetree/bindings/drm/i2c/tda998x.txt
index e9e4bce..e50e7cd 100644
--- a/Documentation/devicetree/bindings/drm/i2c/tda998x.txt
+++ b/Documentation/devicetree/bindings/drm/i2c/tda998x.txt
@@ -17,6 +17,20 @@ Optional properties:
- video-ports: 24 bits value which defines how the video controller
output is wired to the TDA998x input - default: <0x230145>
+ - audio-ports: must contain one or two values selecting the source
+ in the audio port.
+ The source type is given by the corresponding entry in
+ the audio-port-names property.
+
+ - audio-port-names: must contain entries matching the entries in
+ the audio-ports property.
+ Each value may be "i2s" or "spdif", giving the type of
+ the audio source.
+
+ - #sound-dai-cells: must be set to <1> for use with the simple-card.
+ The TDA998x audio CODEC always defines two DAIs.
+ The DAI 0 is the S/PDIF input and the DAI 1 is the I2S input.
+
Example:
tda998x: hdmi-encoder {
@@ -26,4 +40,8 @@ Example:
interrupts = <27 2>; /* falling edge */
pinctrl-0 = <&pmx_camera>;
pinctrl-names = "default";
+
+ audio-ports = <0x04>, <0x03>;
+ audio-port-names = "spdif", "i2s";
+ #sound-dai-cells = <1>;
};
diff --git a/drivers/gpu/drm/i2c/tda998x_drv.c b/drivers/gpu/drm/i2c/tda998x_drv.c
index 70658af..9d9b072 100644
--- a/drivers/gpu/drm/i2c/tda998x_drv.c
+++ b/drivers/gpu/drm/i2c/tda998x_drv.c
@@ -20,6 +20,7 @@
#include <linux/module.h>
#include <linux/irq.h>
#include <sound/asoundef.h>
+#include <linux/platform_device.h>
#include <drm/drmP.h>
#include <drm/drm_crtc_helper.h>
@@ -44,6 +45,8 @@ struct tda998x_priv {
wait_queue_head_t wq_edid;
volatile int wq_edid_wait;
struct drm_encoder *encoder;
+
+ u8 audio_ports[2];
};
#define to_tda998x_priv(x) ((struct tda998x_priv *)to_encoder_slave(x)->slave_priv)
@@ -1254,12 +1257,16 @@ static int tda998x_create(struct i2c_client *client, struct tda998x_priv *priv)
{
struct device_node *np = client->dev.of_node;
u32 video;
- int rev_lo, rev_hi, ret;
+ int i, rev_lo, rev_hi, ret;
+ const char *p;
priv->vip_cntrl_0 = VIP_CNTRL_0_SWAP_A(2) | VIP_CNTRL_0_SWAP_B(3);
priv->vip_cntrl_1 = VIP_CNTRL_1_SWAP_C(0) | VIP_CNTRL_1_SWAP_D(1);
priv->vip_cntrl_2 = VIP_CNTRL_2_SWAP_E(4) | VIP_CNTRL_2_SWAP_F(5);
+ priv->params.audio_frame[1] = 1; /* channels - 1 */
+ priv->params.audio_sample_rate = 48000; /* 48kHz */
+
priv->current_page = 0xff;
priv->hdmi = client;
priv->cec = i2c_new_dummy(client->adapter, 0x34);
@@ -1351,15 +1358,50 @@ static int tda998x_create(struct i2c_client *client, struct tda998x_priv *priv)
/* enable EDID read irq: */
reg_set(priv, REG_INT_FLAGS_2, INT_FLAGS_2_EDID_BLK_RD);
- if (!np)
- return 0; /* non-DT */
+ /* get the device tree parameters */
+ if (np) {
+
+ /* optional video properties */
+ ret = of_property_read_u32(np, "video-ports", &video);
+ if (ret == 0) {
+ priv->vip_cntrl_0 = video >> 16;
+ priv->vip_cntrl_1 = video >> 8;
+ priv->vip_cntrl_2 = video;
+ }
+
+ /* optional audio properties */
+ for (i = 0; i < 2; i++) {
+ u32 port;
- /* get the optional video properties */
- ret = of_property_read_u32(np, "video-ports", &video);
- if (ret == 0) {
- priv->vip_cntrl_0 = video >> 16;
- priv->vip_cntrl_1 = video >> 8;
- priv->vip_cntrl_2 = video;
+ ret = of_property_read_u32_index(np, "audio-ports", i, &port);
+ if (ret)
+ break;
+ ret = of_property_read_string_index(np, "audio-port-names",
+ i, &p);
+ if (ret) {
+ dev_err(&client->dev,
+ "missing audio-port-names[%d]\n", i);
+ break;
+ }
+ if (strcmp(p, "spdif") == 0) {
+ priv->audio_ports[0] = port;
+ } else if (strcmp(p, "i2s") == 0) {
+ priv->audio_ports[1] = port;
+ } else {
+ dev_err(&client->dev,
+ "bad audio-port-names '%s'\n", p);
+ break;
+ }
+ }
+ if (priv->audio_ports[0]) {
+ priv->params.audio_cfg = priv->audio_ports[0];
+ priv->params.audio_format = AFMT_SPDIF;
+ priv->params.audio_clk_cfg = 0;
+ } else {
+ priv->params.audio_cfg = priv->audio_ports[1];
+ priv->params.audio_format = AFMT_I2S;
+ priv->params.audio_clk_cfg = 1;
+ }
}
return 0;
--
2.1.4
--
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