[PATCH v5 1/1] drm: sti: Add ASoC generic hdmi codec support.
Arnaud Pouliquen
arnaud.pouliquen at st.com
Mon May 30 13:31:37 UTC 2016
Add the interface needed by audio hdmi-codec driver.
Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen at st.com>
---
drivers/gpu/drm/sti/Kconfig | 1 +
drivers/gpu/drm/sti/sti_hdmi.c | 294 ++++++++++++++++++++++++++++++++++++++---
drivers/gpu/drm/sti/sti_hdmi.h | 13 ++
3 files changed, 291 insertions(+), 17 deletions(-)
diff --git a/drivers/gpu/drm/sti/Kconfig b/drivers/gpu/drm/sti/Kconfig
index 5ad43a1..494ab25 100644
--- a/drivers/gpu/drm/sti/Kconfig
+++ b/drivers/gpu/drm/sti/Kconfig
@@ -7,5 +7,6 @@ config DRM_STI
select DRM_KMS_CMA_HELPER
select DRM_PANEL
select FW_LOADER
+ select SND_SOC_HDMI_CODEC if SND_SOC
help
Choose this option to enable DRM on STM stiH41x chipset
diff --git a/drivers/gpu/drm/sti/sti_hdmi.c b/drivers/gpu/drm/sti/sti_hdmi.c
index 6ef0715..f345c2d 100644
--- a/drivers/gpu/drm/sti/sti_hdmi.c
+++ b/drivers/gpu/drm/sti/sti_hdmi.c
@@ -18,6 +18,8 @@
#include <drm/drm_crtc_helper.h>
#include <drm/drm_edid.h>
+#include <sound/hdmi-codec.h>
+
#include "sti_hdmi.h"
#include "sti_hdmi_tx3g4c28phy.h"
#include "sti_hdmi_tx3g0c55phy.h"
@@ -35,6 +37,8 @@
#define HDMI_DFLT_CHL0_DAT 0x0110
#define HDMI_DFLT_CHL1_DAT 0x0114
#define HDMI_DFLT_CHL2_DAT 0x0118
+#define HDMI_AUDIO_CFG 0x0200
+#define HDMI_SPDIF_FIFO_STATUS 0x0204
#define HDMI_SW_DI_1_HEAD_WORD 0x0210
#define HDMI_SW_DI_1_PKT_WORD0 0x0214
#define HDMI_SW_DI_1_PKT_WORD1 0x0218
@@ -44,6 +48,9 @@
#define HDMI_SW_DI_1_PKT_WORD5 0x0228
#define HDMI_SW_DI_1_PKT_WORD6 0x022C
#define HDMI_SW_DI_CFG 0x0230
+#define HDMI_SAMPLE_FLAT_MASK 0x0244
+#define HDMI_AUDN 0x0400
+#define HDMI_AUD_CTS 0x0404
#define HDMI_SW_DI_2_HEAD_WORD 0x0600
#define HDMI_SW_DI_2_PKT_WORD0 0x0604
#define HDMI_SW_DI_2_PKT_WORD1 0x0608
@@ -103,6 +110,7 @@
#define HDMI_INT_DLL_LCK BIT(5)
#define HDMI_INT_NEW_FRAME BIT(6)
#define HDMI_INT_GENCTRL_PKT BIT(7)
+#define HDMI_INT_AUDIO_FIFO_XRUN BIT(8)
#define HDMI_INT_SINK_TERM_PRESENT BIT(11)
#define HDMI_DEFAULT_INT (HDMI_INT_SINK_TERM_PRESENT \
@@ -111,6 +119,7 @@
| HDMI_INT_GLOBAL)
#define HDMI_WORKING_INT (HDMI_INT_SINK_TERM_PRESENT \
+ | HDMI_INT_AUDIO_FIFO_XRUN \
| HDMI_INT_GENCTRL_PKT \
| HDMI_INT_NEW_FRAME \
| HDMI_INT_DLL_LCK \
@@ -121,6 +130,27 @@
#define HDMI_STA_SW_RST BIT(1)
+#define HDMI_AUD_CFG_8CH BIT(0)
+#define HDMI_AUD_CFG_SPDIF_DIV_2 BIT(1)
+#define HDMI_AUD_CFG_SPDIF_DIV_3 BIT(2)
+#define HDMI_AUD_CFG_SPDIF_CLK_DIV_4 (BIT(1) | BIT(2))
+#define HDMI_AUD_CFG_CTS_CLK_256FS BIT(12)
+#define HDMI_AUD_CFG_DTS_INVALID BIT(16)
+#define HDMI_AUD_CFG_ONE_BIT_INVALID (BIT(18) | BIT(19) | BIT(20) | BIT(21))
+#define HDMI_AUD_CFG_CH12_VALID BIT(28)
+#define HDMI_AUD_CFG_CH34_VALID BIT(29)
+#define HDMI_AUD_CFG_CH56_VALID BIT(30)
+#define HDMI_AUD_CFG_CH78_VALID BIT(31)
+
+/* sample flat mask */
+#define HDMI_SAMPLE_FLAT_NO 0
+#define HDMI_SAMPLE_FLAT_SP0 BIT(0)
+#define HDMI_SAMPLE_FLAT_SP1 BIT(1)
+#define HDMI_SAMPLE_FLAT_SP2 BIT(2)
+#define HDMI_SAMPLE_FLAT_SP3 BIT(3)
+#define HDMI_SAMPLE_FLAT_ALL (HDMI_SAMPLE_FLAT_SP0 | HDMI_SAMPLE_FLAT_SP1 |\
+ HDMI_SAMPLE_FLAT_SP2 | HDMI_SAMPLE_FLAT_SP3)
+
#define HDMI_INFOFRAME_HEADER_TYPE(x) (((x) & 0xff) << 0)
#define HDMI_INFOFRAME_HEADER_VERSION(x) (((x) & 0xff) << 8)
#define HDMI_INFOFRAME_HEADER_LEN(x) (((x) & 0x0f) << 16)
@@ -171,6 +201,10 @@ static irqreturn_t hdmi_irq_thread(int irq, void *arg)
wake_up_interruptible(&hdmi->wait_event);
}
+ /* Audio FIFO underrun IRQ */
+ if (hdmi->irq_status & HDMI_INT_AUDIO_FIFO_XRUN)
+ DRM_INFO("Warning: audio FIFO underrun occurs!");
+
return IRQ_HANDLED;
}
@@ -441,26 +475,29 @@ static int hdmi_avi_infoframe_config(struct sti_hdmi *hdmi)
*/
static int hdmi_audio_infoframe_config(struct sti_hdmi *hdmi)
{
- struct hdmi_audio_infoframe infofame;
+ struct hdmi_audio_params *audio = &hdmi->audio;
u8 buffer[HDMI_INFOFRAME_SIZE(AUDIO)];
- int ret;
-
- ret = hdmi_audio_infoframe_init(&infofame);
- if (ret < 0) {
- DRM_ERROR("failed to setup audio infoframe: %d\n", ret);
- return ret;
- }
-
- infofame.channels = 2;
-
- ret = hdmi_audio_infoframe_pack(&infofame, buffer, sizeof(buffer));
- if (ret < 0) {
- DRM_ERROR("failed to pack audio infoframe: %d\n", ret);
- return ret;
+ int ret, val;
+
+ DRM_DEBUG_DRIVER("enter %s, AIF %s\n", __func__,
+ audio->enabled ? "enable" : "disable");
+ if (audio->enabled) {
+ /* set audio parameters stored*/
+ ret = hdmi_audio_infoframe_pack(&audio->cea, buffer,
+ sizeof(buffer));
+ if (ret < 0) {
+ DRM_ERROR("failed to pack audio infoframe: %d\n", ret);
+ return ret;
+ }
+ hdmi_infoframe_write_infopack(hdmi, buffer, ret);
+ } else {
+ /*disable audio info frame transmission */
+ val = hdmi_read(hdmi, HDMI_SW_DI_CFG);
+ val &= ~HDMI_IFRAME_CFG_DI_N(HDMI_IFRAME_MASK,
+ HDMI_IFRAME_SLOT_AUDIO);
+ hdmi_write(hdmi, val, HDMI_SW_DI_CFG);
}
- hdmi_infoframe_write_infopack(hdmi, buffer, ret);
-
return 0;
}
@@ -656,6 +693,10 @@ static int hdmi_dbg_show(struct seq_file *s, void *data)
DBGFS_DUMP("", HDMI_SW_DI_CFG);
hdmi_dbg_sw_di_cfg(s, hdmi_read(hdmi, HDMI_SW_DI_CFG));
+ DBGFS_DUMP("\n", HDMI_AUDIO_CFG);
+ DBGFS_DUMP("\n", HDMI_SPDIF_FIFO_STATUS);
+ DBGFS_DUMP("\n", HDMI_AUDN);
+
seq_printf(s, "\n AVI Infoframe (Data Island slot N=%d):",
HDMI_IFRAME_SLOT_AVI);
DBGFS_DUMP_DI(HDMI_SW_DI_N_HEAD_WORD, HDMI_IFRAME_SLOT_AVI);
@@ -861,6 +902,7 @@ static int sti_hdmi_connector_get_modes(struct drm_connector *connector)
count = drm_add_edid_modes(connector, edid);
drm_mode_connector_update_edid_property(connector, edid);
+ drm_edid_to_eld(connector, edid);
kfree(edid);
return count;
@@ -1049,6 +1091,206 @@ static struct drm_encoder *sti_hdmi_find_encoder(struct drm_device *dev)
return NULL;
}
+/**
+ * sti_hdmi_audio_get_non_coherent_n() - get N parameter for non-coherent
+ * clocks. None-coherent clocks means that audio and TMDS clocks have not the
+ * same source (drifts between clocks). In this case assumption is that CTS is
+ * automatically calculated by hardware.
+ *
+ * @audio_fs: audio frame clock frequency in Hz
+ *
+ * Values computed are based on table described in HDMI specification 1.4b
+ *
+ * Returns n value.
+ */
+static int sti_hdmi_audio_get_non_coherent_n(unsigned int audio_fs)
+{
+ unsigned int n;
+
+ switch (audio_fs) {
+ case 32000:
+ n = 4096;
+ break;
+ case 44100:
+ n = 6272;
+ break;
+ case 48000:
+ n = 6144;
+ break;
+ case 88200:
+ n = 6272 * 2;
+ break;
+ case 96000:
+ n = 6144 * 2;
+ break;
+ case 176400:
+ n = 6272 * 4;
+ break;
+ case 192000:
+ n = 6144 * 4;
+ break;
+ default:
+ /* Not pre-defined, recommended value: 128 * fs / 1000 */
+ n = (audio_fs * 128) / 1000;
+ }
+
+ return n;
+}
+
+static int hdmi_audio_configure(struct sti_hdmi *hdmi,
+ struct hdmi_audio_params *params)
+{
+ int audio_cfg, n;
+ struct hdmi_audio_infoframe *info = ¶ms->cea;
+
+ DRM_DEBUG_DRIVER("\n");
+
+ if (!hdmi->enabled)
+ return 0;
+
+ /* update N parameter */
+ n = sti_hdmi_audio_get_non_coherent_n(params->sample_rate);
+
+ DRM_DEBUG_DRIVER("Audio rate = %d Hz, TMDS clock = %d Hz, n = %d\n",
+ params->sample_rate, hdmi->mode.clock * 1000, n);
+ hdmi_write(hdmi, n, HDMI_AUDN);
+
+ /* update HDMI registers according to configuration */
+ audio_cfg = HDMI_AUD_CFG_SPDIF_DIV_2 | HDMI_AUD_CFG_DTS_INVALID |
+ HDMI_AUD_CFG_ONE_BIT_INVALID;
+
+ switch (info->channels) {
+ case 8:
+ audio_cfg |= HDMI_AUD_CFG_CH78_VALID;
+ case 6:
+ audio_cfg |= HDMI_AUD_CFG_CH56_VALID;
+ case 4:
+ audio_cfg |= HDMI_AUD_CFG_CH34_VALID | HDMI_AUD_CFG_8CH;
+ case 2:
+ audio_cfg |= HDMI_AUD_CFG_CH12_VALID;
+ break;
+ default:
+ DRM_ERROR("ERROR: Unsupported number of channels (%d)!\n",
+ info->channels);
+ return -EINVAL;
+ }
+
+ hdmi_write(hdmi, audio_cfg, HDMI_AUDIO_CFG);
+
+ hdmi->audio = *params;
+
+ return hdmi_audio_infoframe_config(hdmi);
+}
+
+static void hdmi_audio_shutdown(struct device *dev)
+{
+ struct sti_hdmi *hdmi = dev_get_drvdata(dev);
+ int audio_cfg;
+
+ DRM_DEBUG_DRIVER("\n");
+
+ /* disable audio */
+ audio_cfg = HDMI_AUD_CFG_SPDIF_DIV_2 | HDMI_AUD_CFG_DTS_INVALID |
+ HDMI_AUD_CFG_ONE_BIT_INVALID;
+ hdmi_write(hdmi, audio_cfg, HDMI_AUDIO_CFG);
+
+ hdmi->audio.enabled = 0;
+ hdmi_audio_infoframe_config(hdmi);
+}
+
+static int hdmi_audio_hw_params(struct device *dev,
+ struct hdmi_codec_daifmt *daifmt,
+ struct hdmi_codec_params *params)
+{
+ struct sti_hdmi *hdmi = dev_get_drvdata(dev);
+ int ret;
+ struct hdmi_audio_params audio = {
+ .sample_width = params->sample_width,
+ .sample_rate = params->sample_rate,
+ .cea = params->cea,
+ };
+
+ DRM_DEBUG_DRIVER("\n");
+
+ if (!hdmi->enabled)
+ return 0;
+
+ if ((daifmt->fmt != HDMI_I2S) || 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;
+ }
+
+ audio.enabled = 1;
+
+ ret = hdmi_audio_configure(hdmi, &audio);
+ if (ret < 0)
+ return ret;
+
+ return 0;
+}
+
+static int hdmi_audio_digital_mute(struct device *dev, bool enable)
+{
+ struct sti_hdmi *hdmi = dev_get_drvdata(dev);
+
+ DRM_DEBUG_DRIVER("%s\n", enable ? "enable" : "disable");
+
+ if (enable)
+ hdmi_write(hdmi, HDMI_SAMPLE_FLAT_ALL, HDMI_SAMPLE_FLAT_MASK);
+ else
+ hdmi_write(hdmi, HDMI_SAMPLE_FLAT_NO, HDMI_SAMPLE_FLAT_MASK);
+
+ return 0;
+}
+
+static int hdmi_audio_get_eld(struct device *dev, uint8_t *buf, size_t len)
+{
+ struct sti_hdmi *hdmi = dev_get_drvdata(dev);
+ struct drm_connector *connector = hdmi->drm_connector;
+
+ DRM_DEBUG_DRIVER("\n");
+ memcpy(buf, connector->eld, min(sizeof(connector->eld), len));
+
+ return 0;
+}
+
+static const struct hdmi_codec_ops audio_codec_ops = {
+ .hw_params = hdmi_audio_hw_params,
+ .audio_shutdown = hdmi_audio_shutdown,
+ .digital_mute = hdmi_audio_digital_mute,
+ .get_eld = hdmi_audio_get_eld,
+};
+
+static int sti_hdmi_register_audio_driver(struct device *dev,
+ struct sti_hdmi *hdmi)
+{
+ struct hdmi_codec_pdata codec_data = {
+ .ops = &audio_codec_ops,
+ .max_i2s_channels = 8,
+ .i2s = 1,
+ };
+
+ DRM_DEBUG_DRIVER("\n");
+
+ hdmi->audio.enabled = 0;
+
+ hdmi->audio_pdev = platform_device_register_data(
+ dev, HDMI_CODEC_DRV_NAME, PLATFORM_DEVID_AUTO,
+ &codec_data, sizeof(codec_data));
+
+ if (IS_ERR(hdmi->audio_pdev))
+ return PTR_ERR(hdmi->audio_pdev);
+
+ DRM_INFO("%s Driver bound %s\n", HDMI_CODEC_DRV_NAME, dev_name(dev));
+
+ return 0;
+}
+
static int sti_hdmi_bind(struct device *dev, struct device *master, void *data)
{
struct sti_hdmi *hdmi = dev_get_drvdata(dev);
@@ -1099,12 +1341,27 @@ static int sti_hdmi_bind(struct device *dev, struct device *master, void *data)
if (err)
goto err_connector;
+ hdmi->drm_connector = drm_connector;
+
err = drm_mode_connector_attach_encoder(drm_connector, encoder);
if (err) {
DRM_ERROR("Failed to attach a connector to a encoder\n");
goto err_sysfs;
}
+ err = sti_hdmi_register_audio_driver(dev, hdmi);
+ if (err) {
+ DRM_ERROR("Failed to attach an audio codec\n");
+ goto err_sysfs;
+ }
+
+ /* Initialize audio infoframe */
+ err = hdmi_audio_infoframe_init(&hdmi->audio.cea);
+ if (err) {
+ DRM_ERROR("Failed to init audio infoframe\n");
+ goto err_sysfs;
+ }
+
/* Enable default interrupts */
hdmi_write(hdmi, HDMI_DEFAULT_INT, HDMI_INT_EN);
@@ -1115,6 +1372,7 @@ static int sti_hdmi_bind(struct device *dev, struct device *master, void *data)
err_sysfs:
drm_connector_unregister(drm_connector);
+ hdmi->drm_connector = NULL;
err_connector:
drm_connector_cleanup(drm_connector);
@@ -1267,6 +1525,8 @@ static int sti_hdmi_remove(struct platform_device *pdev)
struct sti_hdmi *hdmi = dev_get_drvdata(&pdev->dev);
i2c_put_adapter(hdmi->ddc_adapt);
+ if (hdmi->audio_pdev)
+ platform_device_unregister(hdmi->audio_pdev);
component_del(&pdev->dev, &sti_hdmi_ops);
return 0;
diff --git a/drivers/gpu/drm/sti/sti_hdmi.h b/drivers/gpu/drm/sti/sti_hdmi.h
index ef3a945..119bc35 100644
--- a/drivers/gpu/drm/sti/sti_hdmi.h
+++ b/drivers/gpu/drm/sti/sti_hdmi.h
@@ -23,6 +23,13 @@ struct hdmi_phy_ops {
void (*stop)(struct sti_hdmi *hdmi);
};
+struct hdmi_audio_params {
+ bool enabled;
+ unsigned int sample_width;
+ unsigned int sample_rate;
+ struct hdmi_audio_infoframe cea;
+};
+
/* values for the framing mode property */
enum sti_hdmi_modes {
HDMI_MODE_HDMI,
@@ -67,6 +74,9 @@ static const struct drm_prop_enum_list colorspace_mode_names[] = {
* @ddc_adapt: i2c ddc adapter
* @colorspace: current colorspace selected
* @hdmi_mode: select framing for HDMI or DVI
+ * @audio_pdev: ASoC hdmi-codec platform device
+ * @audio: hdmi audio parameters.
+ * @drm_connector: hdmi connector
*/
struct sti_hdmi {
struct device dev;
@@ -89,6 +99,9 @@ struct sti_hdmi {
struct i2c_adapter *ddc_adapt;
enum hdmi_colorspace colorspace;
enum sti_hdmi_modes hdmi_mode;
+ struct platform_device *audio_pdev;
+ struct hdmi_audio_params audio;
+ struct drm_connector *drm_connector;
};
u32 hdmi_read(struct sti_hdmi *hdmi, int offset);
--
1.9.1
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