Merge branch 'drm-tda998x-mali' of git://git.armlinux.org.uk/~rmk/linux-arm into...
[muen/linux.git] / drivers / gpu / drm / i2c / tda998x_drv.c
index 6e6fca20ba8b46e1d51d99b5f1cc99f6cf24983e..027521f30b6ebc3f1c5bf1f9afa5f77a91b8a2c1 100644 (file)
@@ -20,6 +20,7 @@
 #include <linux/module.h>
 #include <linux/irq.h>
 #include <sound/asoundef.h>
+#include <sound/hdmi-codec.h>
 
 #include <drm/drmP.h>
 #include <drm/drm_atomic_helper.h>
 
 #define DBG(fmt, ...) DRM_DEBUG(fmt"\n", ##__VA_ARGS__)
 
+struct tda998x_audio_port {
+       u8 format;              /* AFMT_xxx */
+       u8 config;              /* AP value */
+};
+
 struct tda998x_priv {
        struct i2c_client *cec;
        struct i2c_client *hdmi;
@@ -41,7 +47,10 @@ struct tda998x_priv {
        u8 vip_cntrl_0;
        u8 vip_cntrl_1;
        u8 vip_cntrl_2;
-       struct tda998x_encoder_params params;
+       struct tda998x_audio_params audio_params;
+
+       struct platform_device *audio_pdev;
+       struct mutex audio_mutex;
 
        wait_queue_head_t wq_edid;
        volatile int wq_edid_wait;
@@ -53,6 +62,8 @@ struct tda998x_priv {
 
        struct drm_encoder encoder;
        struct drm_connector connector;
+
+       struct tda998x_audio_port audio_port[2];
 };
 
 #define conn_to_tda998x_priv(x) \
@@ -666,26 +677,16 @@ tda998x_write_if(struct tda998x_priv *priv, u8 bit, u16 addr,
        reg_set(priv, REG_DIP_IF_FLAGS, bit);
 }
 
-static void
-tda998x_write_aif(struct tda998x_priv *priv, struct tda998x_encoder_params *p)
+static int tda998x_write_aif(struct tda998x_priv *priv,
+                            struct hdmi_audio_infoframe *cea)
 {
        union hdmi_infoframe frame;
 
-       hdmi_audio_infoframe_init(&frame.audio);
-
-       frame.audio.channels = p->audio_frame[1] & 0x07;
-       frame.audio.channel_allocation = p->audio_frame[4];
-       frame.audio.level_shift_value = (p->audio_frame[5] & 0x78) >> 3;
-       frame.audio.downmix_inhibit = (p->audio_frame[5] & 0x80) >> 7;
-
-       /*
-        * L-PCM and IEC61937 compressed audio shall always set sample
-        * frequency to "refer to stream".  For others, see the HDMI
-        * specification.
-        */
-       frame.audio.sample_frequency = (p->audio_frame[2] & 0x1c) >> 2;
+       frame.audio = *cea;
 
        tda998x_write_if(priv, DIP_IF_FLAGS_IF4, REG_IF4_HB0, &frame);
+
+       return 0;
 }
 
 static void
@@ -710,20 +711,21 @@ static void tda998x_audio_mute(struct tda998x_priv *priv, bool on)
        }
 }
 
-static void
+static int
 tda998x_configure_audio(struct tda998x_priv *priv,
-               struct drm_display_mode *mode, struct tda998x_encoder_params *p)
+                       struct tda998x_audio_params *params,
+                       unsigned mode_clock)
 {
        u8 buf[6], clksel_aip, clksel_fs, cts_n, adiv;
        u32 n;
 
        /* Enable audio ports */
-       reg_write(priv, REG_ENA_AP, p->audio_cfg);
-       reg_write(priv, REG_ENA_ACLK, p->audio_clk_cfg);
+       reg_write(priv, REG_ENA_AP, params->config);
 
        /* Set audio input source */
-       switch (p->audio_format) {
+       switch (params->format) {
        case AFMT_SPDIF:
+               reg_write(priv, REG_ENA_ACLK, 0);
                reg_write(priv, REG_MUX_AP, MUX_AP_SELECT_SPDIF);
                clksel_aip = AIP_CLKSEL_AIP_SPDIF;
                clksel_fs = AIP_CLKSEL_FS_FS64SPDIF;
@@ -731,15 +733,29 @@ tda998x_configure_audio(struct tda998x_priv *priv,
                break;
 
        case AFMT_I2S:
+               reg_write(priv, REG_ENA_ACLK, 1);
                reg_write(priv, REG_MUX_AP, MUX_AP_SELECT_I2S);
                clksel_aip = AIP_CLKSEL_AIP_I2S;
                clksel_fs = AIP_CLKSEL_FS_ACLK;
-               cts_n = CTS_N_M(3) | CTS_N_K(3);
+               switch (params->sample_width) {
+               case 16:
+                       cts_n = CTS_N_M(3) | CTS_N_K(1);
+                       break;
+               case 18:
+               case 20:
+               case 24:
+                       cts_n = CTS_N_M(3) | CTS_N_K(2);
+                       break;
+               default:
+               case 32:
+                       cts_n = CTS_N_M(3) | CTS_N_K(3);
+                       break;
+               }
                break;
 
        default:
-               BUG();
-               return;
+               dev_err(&priv->hdmi->dev, "Unsupported I2S format\n");
+               return -EINVAL;
        }
 
        reg_write(priv, REG_AIP_CLKSEL, clksel_aip);
@@ -755,11 +771,11 @@ tda998x_configure_audio(struct tda998x_priv *priv,
         * assume 100MHz requires larger divider.
         */
        adiv = AUDIO_DIV_SERCLK_8;
-       if (mode->clock > 100000)
+       if (mode_clock > 100000)
                adiv++;                 /* AUDIO_DIV_SERCLK_16 */
 
        /* S/PDIF asks for a larger divider */
-       if (p->audio_format == AFMT_SPDIF)
+       if (params->format == AFMT_SPDIF)
                adiv++;                 /* AUDIO_DIV_SERCLK_16 or _32 */
 
        reg_write(priv, REG_AUDIO_DIV, adiv);
@@ -768,7 +784,7 @@ tda998x_configure_audio(struct tda998x_priv *priv,
         * This is the approximate value of N, which happens to be
         * the recommended values for non-coherent clocks.
         */
-       n = 128 * p->audio_sample_rate / 1000;
+       n = 128 * params->sample_rate / 1000;
 
        /* Write the CTS and N values */
        buf[0] = 0x44;
@@ -786,20 +802,21 @@ tda998x_configure_audio(struct tda998x_priv *priv,
        reg_set(priv, REG_AIP_CNTRL_0, AIP_CNTRL_0_RST_CTS);
        reg_clear(priv, REG_AIP_CNTRL_0, AIP_CNTRL_0_RST_CTS);
 
-       /* Write the channel status */
-       buf[0] = IEC958_AES0_CON_NOT_COPYRIGHT;
-       buf[1] = 0x00;
-       buf[2] = IEC958_AES3_CON_FS_NOTID;
-       buf[3] = IEC958_AES4_CON_ORIGFS_NOTID |
-                       IEC958_AES4_CON_MAX_WORDLEN_24;
+       /* Write the channel status
+        * The REG_CH_STAT_B-registers skip IEC958 AES2 byte, because
+        * there is a separate register for each I2S wire.
+        */
+       buf[0] = params->status[0];
+       buf[1] = params->status[1];
+       buf[2] = params->status[3];
+       buf[3] = params->status[4];
        reg_write_range(priv, REG_CH_STAT_B(0), buf, 4);
 
        tda998x_audio_mute(priv, true);
        msleep(20);
        tda998x_audio_mute(priv, false);
 
-       /* Write the audio information packet */
-       tda998x_write_aif(priv, p);
+       return tda998x_write_aif(priv, &params->cea);
 }
 
 /* DRM encoder functions */
@@ -820,7 +837,7 @@ static void tda998x_encoder_set_config(struct tda998x_priv *priv,
                            VIP_CNTRL_2_SWAP_F(p->swap_f) |
                            (p->mirr_f ? VIP_CNTRL_2_MIRR_F : 0);
 
-       priv->params = *p;
+       priv->audio_params = p->audio_params;
 }
 
 static void tda998x_encoder_dpms(struct drm_encoder *encoder, int mode)
@@ -1057,9 +1074,13 @@ tda998x_encoder_mode_set(struct drm_encoder *encoder,
 
                tda998x_write_avi(priv, adjusted_mode);
 
-               if (priv->params.audio_cfg)
-                       tda998x_configure_audio(priv, adjusted_mode,
-                                               &priv->params);
+               if (priv->audio_params.format != AFMT_UNUSED) {
+                       mutex_lock(&priv->audio_mutex);
+                       tda998x_configure_audio(priv,
+                                               &priv->audio_params,
+                                               adjusted_mode->clock);
+                       mutex_unlock(&priv->audio_mutex);
+               }
        }
 }
 
@@ -1159,6 +1180,8 @@ static int tda998x_connector_get_modes(struct drm_connector *connector)
        drm_mode_connector_update_edid_property(connector, edid);
        n = drm_add_edid_modes(connector, edid);
        priv->is_hdmi_sink = drm_detect_hdmi_monitor(edid);
+       drm_edid_to_eld(connector, edid);
+
        kfree(edid);
 
        return n;
@@ -1180,6 +1203,9 @@ static void tda998x_destroy(struct tda998x_priv *priv)
        cec_write(priv, REG_CEC_RXSHPDINTENA, 0);
        reg_clear(priv, REG_INT_FLAGS_2, INT_FLAGS_2_EDID_BLK_RD);
 
+       if (priv->audio_pdev)
+               platform_device_unregister(priv->audio_pdev);
+
        if (priv->hdmi->irq)
                free_irq(priv->hdmi->irq, priv);
 
@@ -1189,8 +1215,190 @@ static void tda998x_destroy(struct tda998x_priv *priv)
        i2c_unregister_device(priv->cec);
 }
 
+static int tda998x_audio_hw_params(struct device *dev, void *data,
+                                  struct hdmi_codec_daifmt *daifmt,
+                                  struct hdmi_codec_params *params)
+{
+       struct tda998x_priv *priv = dev_get_drvdata(dev);
+       int i, ret;
+       struct tda998x_audio_params audio = {
+               .sample_width = params->sample_width,
+               .sample_rate = params->sample_rate,
+               .cea = params->cea,
+       };
+
+       if (!priv->encoder.crtc)
+               return -ENODEV;
+
+       memcpy(audio.status, params->iec.status,
+              min(sizeof(audio.status), sizeof(params->iec.status)));
+
+       switch (daifmt->fmt) {
+       case HDMI_I2S:
+               if (daifmt->bit_clk_inv || daifmt->frame_clk_inv ||
+                   daifmt->bit_clk_master || daifmt->frame_clk_master) {
+                       dev_err(dev, "%s: Bad flags %d %d %d %d\n", __func__,
+                               daifmt->bit_clk_inv, daifmt->frame_clk_inv,
+                               daifmt->bit_clk_master,
+                               daifmt->frame_clk_master);
+                       return -EINVAL;
+               }
+               for (i = 0; i < ARRAY_SIZE(priv->audio_port); i++)
+                       if (priv->audio_port[i].format == AFMT_I2S)
+                               audio.config = priv->audio_port[i].config;
+               audio.format = AFMT_I2S;
+               break;
+       case HDMI_SPDIF:
+               for (i = 0; i < ARRAY_SIZE(priv->audio_port); i++)
+                       if (priv->audio_port[i].format == AFMT_SPDIF)
+                               audio.config = priv->audio_port[i].config;
+               audio.format = AFMT_SPDIF;
+               break;
+       default:
+               dev_err(dev, "%s: Invalid format %d\n", __func__, daifmt->fmt);
+               return -EINVAL;
+       }
+
+       if (audio.config == 0) {
+               dev_err(dev, "%s: No audio configutation found\n", __func__);
+               return -EINVAL;
+       }
+
+       mutex_lock(&priv->audio_mutex);
+       ret = tda998x_configure_audio(priv,
+                                     &audio,
+                                     priv->encoder.crtc->hwmode.clock);
+
+       if (ret == 0)
+               priv->audio_params = audio;
+       mutex_unlock(&priv->audio_mutex);
+
+       return ret;
+}
+
+static void tda998x_audio_shutdown(struct device *dev, void *data)
+{
+       struct tda998x_priv *priv = dev_get_drvdata(dev);
+
+       mutex_lock(&priv->audio_mutex);
+
+       reg_write(priv, REG_ENA_AP, 0);
+
+       priv->audio_params.format = AFMT_UNUSED;
+
+       mutex_unlock(&priv->audio_mutex);
+}
+
+static int
+tda998x_audio_digital_mute(struct device *dev, void *data, bool enable)
+{
+       struct tda998x_priv *priv = dev_get_drvdata(dev);
+
+       mutex_lock(&priv->audio_mutex);
+
+       tda998x_audio_mute(priv, enable);
+
+       mutex_unlock(&priv->audio_mutex);
+       return 0;
+}
+
+static int tda998x_audio_get_eld(struct device *dev, void *data,
+                                uint8_t *buf, size_t len)
+{
+       struct tda998x_priv *priv = dev_get_drvdata(dev);
+       struct drm_mode_config *config = &priv->encoder.dev->mode_config;
+       struct drm_connector *connector;
+       int ret = -ENODEV;
+
+       mutex_lock(&config->mutex);
+       list_for_each_entry(connector, &config->connector_list, head) {
+               if (&priv->encoder == connector->encoder) {
+                       memcpy(buf, connector->eld,
+                              min(sizeof(connector->eld), len));
+                       ret = 0;
+               }
+       }
+       mutex_unlock(&config->mutex);
+
+       return ret;
+}
+
+static const struct hdmi_codec_ops audio_codec_ops = {
+       .hw_params = tda998x_audio_hw_params,
+       .audio_shutdown = tda998x_audio_shutdown,
+       .digital_mute = tda998x_audio_digital_mute,
+       .get_eld = tda998x_audio_get_eld,
+};
+
+static int tda998x_audio_codec_init(struct tda998x_priv *priv,
+                                   struct device *dev)
+{
+       struct hdmi_codec_pdata codec_data = {
+               .ops = &audio_codec_ops,
+               .max_i2s_channels = 2,
+       };
+       int i;
+
+       for (i = 0; i < ARRAY_SIZE(priv->audio_port); i++) {
+               if (priv->audio_port[i].format == AFMT_I2S &&
+                   priv->audio_port[i].config != 0)
+                       codec_data.i2s = 1;
+               if (priv->audio_port[i].format == AFMT_SPDIF &&
+                   priv->audio_port[i].config != 0)
+                       codec_data.spdif = 1;
+       }
+
+       priv->audio_pdev = platform_device_register_data(
+               dev, HDMI_CODEC_DRV_NAME, PLATFORM_DEVID_AUTO,
+               &codec_data, sizeof(codec_data));
+
+       return PTR_ERR_OR_ZERO(priv->audio_pdev);
+}
+
 /* I2C driver functions */
 
+static int tda998x_get_audio_ports(struct tda998x_priv *priv,
+                                  struct device_node *np)
+{
+       const u32 *port_data;
+       u32 size;
+       int i;
+
+       port_data = of_get_property(np, "audio-ports", &size);
+       if (!port_data)
+               return 0;
+
+       size /= sizeof(u32);
+       if (size > 2 * ARRAY_SIZE(priv->audio_port) || size % 2 != 0) {
+               dev_err(&priv->hdmi->dev,
+                       "Bad number of elements in audio-ports dt-property\n");
+               return -EINVAL;
+       }
+
+       size /= 2;
+
+       for (i = 0; i < size; i++) {
+               u8 afmt = be32_to_cpup(&port_data[2*i]);
+               u8 ena_ap = be32_to_cpup(&port_data[2*i+1]);
+
+               if (afmt != AFMT_SPDIF && afmt != AFMT_I2S) {
+                       dev_err(&priv->hdmi->dev,
+                               "Bad audio format %u\n", afmt);
+                       return -EINVAL;
+               }
+
+               priv->audio_port[i].format = afmt;
+               priv->audio_port[i].config = ena_ap;
+       }
+
+       if (priv->audio_port[0].format == priv->audio_port[1].format) {
+               dev_err(&priv->hdmi->dev,
+                       "There can only be on I2S port and one SPDIF port\n");
+               return -EINVAL;
+       }
+       return 0;
+}
+
 static int tda998x_create(struct i2c_client *client, struct tda998x_priv *priv)
 {
        struct device_node *np = client->dev.of_node;
@@ -1304,7 +1512,7 @@ static int tda998x_create(struct i2c_client *client, struct tda998x_priv *priv)
        if (!np)
                return 0;               /* non-DT */
 
-       /* get the optional video properties */
+       /* get the device tree parameters */
        ret = of_property_read_u32(np, "video-ports", &video);
        if (ret == 0) {
                priv->vip_cntrl_0 = video >> 16;
@@ -1312,8 +1520,16 @@ static int tda998x_create(struct i2c_client *client, struct tda998x_priv *priv)
                priv->vip_cntrl_2 = video;
        }
 
-       return 0;
+       mutex_init(&priv->audio_mutex); /* Protect access from audio thread */
 
+       ret = tda998x_get_audio_ports(priv, np);
+       if (ret)
+               goto fail;
+
+       if (priv->audio_port[0].format != AFMT_UNUSED)
+               tda998x_audio_codec_init(priv, &client->dev);
+
+       return 0;
 fail:
        /* if encoder_init fails, the encoder slave is never registered,
         * so cleanup here: