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Date: Tue, 3 Feb 2015 10:16:03 -0500
From: Yakir Yang <ykk@...k-chips.com>
To: David Airlie <airlied@...ux.ie>,
Russell King <rmk+kernel@....linux.org.uk>,
Philipp Zabel <p.zabel@...gutronix.de>
Cc: Fabio Estevam <fabio.estevam@...escale.com>,
Shawn Guo <shawn.guo@...aro.org>,
Rob Clark <robdclark@...il.com>,
Mark Yao <mark.yao@...k-chips.com>,
Daniel Vetter <daniel@...ll.ch>,
dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
Arnd Bergmann <arnd@...db.de>, Sean Cross <xobs@...agi.com>,
Jyri Sarha <jsarha@...com>, Ben Zhang <benzh@...omium.org>,
alsa-devel@...a-project.org, Heiko Stuebner <heiko@...ech.de>,
linux-arm-kernel@...ts.infradead.org,
Rob Herring <robh+dt@...nel.org>,
Pawel Moll <pawel.moll@....com>,
Mark Rutland <mark.rutland@....com>,
Ian Campbell <ijc+devicetree@...lion.org.uk>,
Kumar Gala <galak@...eaurora.org>, devicetree@...r.kernel.org,
djkurtz@...omium.org, mmind00@...glemail.com,
dianders@...omium.org, marcheu@...omium.org,
linux-rockchip@...ts.infradead.org, Yakir Yang <ykk@...k-chips.com>
Subject: [PATCH v3 10/15] drm: bridge/dw_hdmi: add audio sample channel status setting
When transmitting IEC60985 linear PCM audio, we configure the
Aduio Sample Channel Status information of all the channel
status bits in the IEC60958 frame.
(am from https://patchwork.kernel.org/patch/5749101/)
Signed-off-by: Yakir Yang <ykk@...k-chips.com>
---
Changes in v3:
- Determine whether sample channel should set by desig_id.
Changes in v2:
- Add audio sample channel status setting
drivers/gpu/drm/bridge/dw_hdmi.c | 44 ++++++++++++++++++++++++++++++++++++++++
drivers/gpu/drm/bridge/dw_hdmi.h | 20 ++++++++++++++++++
2 files changed, 64 insertions(+)
diff --git a/drivers/gpu/drm/bridge/dw_hdmi.c b/drivers/gpu/drm/bridge/dw_hdmi.c
index 0bee5ea..44e95f3 100644
--- a/drivers/gpu/drm/bridge/dw_hdmi.c
+++ b/drivers/gpu/drm/bridge/dw_hdmi.c
@@ -196,6 +196,47 @@ static void hdmi_mask_writeb(struct dw_hdmi *hdmi, u8 data, unsigned int reg,
hdmi_modb(hdmi, data << shift, mask, reg);
}
+static void hdmi_set_schnl(struct dw_hdmi *hdmi)
+{
+ u8 aud_schnl_samplerate;
+
+ switch (hdmi->sample_rate) {
+ case 32000:
+ aud_schnl_samplerate = HDMI_FC_AUDSCHNLS7_SMPRATE_32K;
+ break;
+ case 44100:
+ aud_schnl_samplerate = HDMI_FC_AUDSCHNLS7_SMPRATE_44K1;
+ break;
+ case 48000:
+ aud_schnl_samplerate = HDMI_FC_AUDSCHNLS7_SMPRATE_48K;
+ break;
+ case 88200:
+ aud_schnl_samplerate = HDMI_FC_AUDSCHNLS7_SMPRATE_88K2;
+ break;
+ case 96000:
+ aud_schnl_samplerate = HDMI_FC_AUDSCHNLS7_SMPRATE_96K;
+ break;
+ case 176400:
+ aud_schnl_samplerate = HDMI_FC_AUDSCHNLS7_SMPRATE_176K4;
+ break;
+ case 192000:
+ aud_schnl_samplerate = HDMI_FC_AUDSCHNLS7_SMPRATE_192K;
+ break;
+ case 768000:
+ aud_schnl_samplerate = HDMI_FC_AUDSCHNLS7_SMPRATE_768K;
+ break;
+ default:
+ aud_schnl_samplerate = HDMI_FC_AUDSCHNLS7_SMPRATE_44K1;
+ break;
+ }
+
+ /* set channel status register */
+ hdmi_modb(hdmi, aud_schnl_samplerate,
+ HDMI_FC_AUDSCHNLS7_SMPRATE_MASK, HDMI_FC_AUDSCHNLS7);
+ hdmi_writeb(hdmi, ((~aud_schnl_samplerate) << 4) | 0x2,
+ HDMI_FC_AUDSCHNLS8);
+}
+
static void hdmi_set_clock_regenerator(struct dw_hdmi *hdmi,
unsigned int n, unsigned int cts)
{
@@ -439,6 +480,9 @@ static void hdmi_set_clk_regenerator(struct dw_hdmi *hdmi,
pixel_clk, clk_n, clk_cts);
hdmi_set_clock_regenerator(hdmi, clk_n, clk_cts);
+
+ if (hdmi->id.design == 0x20)
+ hdmi_set_schnl(hdmi);
}
static void hdmi_init_clk_regenerator(struct dw_hdmi *hdmi)
diff --git a/drivers/gpu/drm/bridge/dw_hdmi.h b/drivers/gpu/drm/bridge/dw_hdmi.h
index 29e4bee..c2d210f 100644
--- a/drivers/gpu/drm/bridge/dw_hdmi.h
+++ b/drivers/gpu/drm/bridge/dw_hdmi.h
@@ -162,6 +162,17 @@
#define HDMI_FC_SPDDEVICEINF 0x1062
#define HDMI_FC_AUDSCONF 0x1063
#define HDMI_FC_AUDSSTAT 0x1064
+#define HDMI_FC_AUDSV 0x1065
+#define HDMI_FC_AUDSU 0x1066
+#define HDMI_FC_AUDSCHNLS0 0x1067
+#define HDMI_FC_AUDSCHNLS1 0x1068
+#define HDMI_FC_AUDSCHNLS2 0x1069
+#define HDMI_FC_AUDSCHNLS3 0x106a
+#define HDMI_FC_AUDSCHNLS4 0x106b
+#define HDMI_FC_AUDSCHNLS5 0x106c
+#define HDMI_FC_AUDSCHNLS6 0x106d
+#define HDMI_FC_AUDSCHNLS7 0x106e
+#define HDMI_FC_AUDSCHNLS8 0x106f
#define HDMI_FC_DATACH0FILL 0x1070
#define HDMI_FC_DATACH1FILL 0x1071
#define HDMI_FC_DATACH2FILL 0x1072
@@ -754,6 +765,15 @@ enum {
/* HDMI_FC_AUDSCHNLS7 field values */
HDMI_FC_AUDSCHNLS7_ACCURACY_OFFSET = 4,
HDMI_FC_AUDSCHNLS7_ACCURACY_MASK = 0x30,
+ HDMI_FC_AUDSCHNLS7_SMPRATE_MASK = 0x0f,
+ HDMI_FC_AUDSCHNLS7_SMPRATE_192K = 0xe,
+ HDMI_FC_AUDSCHNLS7_SMPRATE_176K4 = 0xc,
+ HDMI_FC_AUDSCHNLS7_SMPRATE_96K = 0xa,
+ HDMI_FC_AUDSCHNLS7_SMPRATE_768K = 0x9,
+ HDMI_FC_AUDSCHNLS7_SMPRATE_88K2 = 0x8,
+ HDMI_FC_AUDSCHNLS7_SMPRATE_32K = 0x3,
+ HDMI_FC_AUDSCHNLS7_SMPRATE_48K = 0x2,
+ HDMI_FC_AUDSCHNLS7_SMPRATE_44K1 = 0x0,
/* HDMI_FC_AUDSCHNLS8 field values */
HDMI_FC_AUDSCHNLS8_ORIGSAMPFREQ_MASK = 0xf0,
--
2.1.2
--
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