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authorRicardo Neri <ricardo.neri@ti.com>2012-05-03 19:27:12 +0200
committerTomi Valkeinen <tomi.valkeinen@ti.com>2012-05-11 14:17:09 +0200
commit24ccfc5541b11f1e6ffcf10f5ce94370440d6c75 (patch)
tree6657224dc42aa28ad885ca5ae9c399579bda669e /drivers/video
parentOMAPDSS: HDMI: Add an audio configuration function (diff)
downloadlinux-24ccfc5541b11f1e6ffcf10f5ce94370440d6c75.tar.xz
linux-24ccfc5541b11f1e6ffcf10f5ce94370440d6c75.zip
OMAPDSS: HDMI: OMAP4: Remap speaker order to match ALSA order
As of today, the only know user of the DSS HDMI audio support is ASoC. Hence, it makes sense to remap the speaker order to match the ALSA speaker order. In the future, a dynamic mapping mechanism may be implemented. Remapping is needed as the HDMI speaker order is FL/FR/LFE/C/RL/RR/ RLC-FLC/RRC-FLC while the ALSA order is FL/FR/RL/RR/C/LFE/SL/SR. Refer to CEA-861 Section 6.6.2 for further details. Signed-off-by: Ricardo Neri <ricardo.neri@ti.com>
Diffstat (limited to 'drivers/video')
-rw-r--r--drivers/video/omap2/dss/ti_hdmi_4xxx_ip.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/video/omap2/dss/ti_hdmi_4xxx_ip.c b/drivers/video/omap2/dss/ti_hdmi_4xxx_ip.c
index 1ce77f37ab50..667c960e10b9 100644
--- a/drivers/video/omap2/dss/ti_hdmi_4xxx_ip.c
+++ b/drivers/video/omap2/dss/ti_hdmi_4xxx_ip.c
@@ -1152,6 +1152,14 @@ static void ti_hdmi_4xxx_core_audio_config(struct hdmi_ip_data *ip_data,
r = FLD_MOD(r, cfg->en_parallel_aud_input, 2, 2);
r = FLD_MOD(r, cfg->en_spdif, 1, 1);
hdmi_write_reg(av_base, HDMI_CORE_AV_AUD_MODE, r);
+
+ /* Audio channel mappings */
+ /* TODO: Make channel mapping dynamic. For now, map channels
+ * in the ALSA order: FL/FR/RL/RR/C/LFE/SL/SR. Remapping is needed as
+ * HDMI speaker order is different. See CEA-861 Section 6.6.2.
+ */
+ hdmi_write_reg(av_base, HDMI_CORE_AV_I2S_IN_MAP, 0x78);
+ REG_FLD_MOD(av_base, HDMI_CORE_AV_SWAP_I2S, 1, 5, 5);
}
static void ti_hdmi_4xxx_core_audio_infoframe_cfg(struct hdmi_ip_data *ip_data,