From: Guillaume Ranquet <granquet@baylibre.com>
To: chunkuang.hu@kernel.org, p.zabel@pengutronix.de,
airlied@linux.ie, daniel@ffwll.ch, robh+dt@kernel.org,
maarten.lankhorst@linux.intel.com, mripard@kernel.org,
tzimmermann@suse.de, matthias.bgg@gmail.com,
chunfeng.yun@mediatek.com, kishon@ti.com, vkoul@kernel.org,
deller@gmx.de, ck.hu@mediatek.com, jitao.shi@mediatek.com,
angelogioacchino.delregno@collabora.com
Cc: dri-devel@lists.freedesktop.org,
linux-mediatek@lists.infradead.org, devicetree@vger.kernel.org,
linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-phy@lists.infradead.org, linux-fbdev@vger.kernel.org,
Markus Schneider-Pargmann <msp@baylibre.com>
Subject: [PATCH v8 04/19] video/hdmi: Add audio_infoframe packing for DP
Date: Fri, 18 Feb 2022 15:54:22 +0100 [thread overview]
Message-ID: <20220218145437.18563-5-granquet@baylibre.com> (raw)
In-Reply-To: <20220218145437.18563-1-granquet@baylibre.com>
From: Markus Schneider-Pargmann <msp@baylibre.com>
Similar to HDMI, DP uses audio infoframes as well which are structured
very similar to the HDMI ones.
This patch adds a helper function to pack the HDMI audio infoframe for
DP, called hdmi_audio_infoframe_pack_for_dp().
hdmi_audio_infoframe_pack_only() is split into two parts. One of them
packs the payload only and can be used for HDMI and DP.
Signed-off-by: Markus Schneider-Pargmann <msp@baylibre.com>
Signed-off-by: Guillaume Ranquet <granquet@baylibre.com>
---
drivers/video/hdmi.c | 83 ++++++++++++++++++++++++++++---------
include/drm/drm_dp_helper.h | 2 +
include/linux/hdmi.h | 7 +++-
3 files changed, 72 insertions(+), 20 deletions(-)
diff --git a/drivers/video/hdmi.c b/drivers/video/hdmi.c
index 947be761dfa40..63e74d9fd210e 100644
--- a/drivers/video/hdmi.c
+++ b/drivers/video/hdmi.c
@@ -21,6 +21,7 @@
* DEALINGS IN THE SOFTWARE.
*/
+#include <drm/drm_dp_helper.h>
#include <linux/bitops.h>
#include <linux/bug.h>
#include <linux/errno.h>
@@ -381,12 +382,34 @@ static int hdmi_audio_infoframe_check_only(const struct hdmi_audio_infoframe *fr
*
* Returns 0 on success or a negative error code on failure.
*/
-int hdmi_audio_infoframe_check(struct hdmi_audio_infoframe *frame)
+int hdmi_audio_infoframe_check(const struct hdmi_audio_infoframe *frame)
{
return hdmi_audio_infoframe_check_only(frame);
}
EXPORT_SYMBOL(hdmi_audio_infoframe_check);
+static void
+hdmi_audio_infoframe_pack_payload(const struct hdmi_audio_infoframe *frame,
+ u8 *buffer)
+{
+ u8 channels;
+
+ if (frame->channels >= 2)
+ channels = frame->channels - 1;
+ else
+ channels = 0;
+
+ buffer[0] = ((frame->coding_type & 0xf) << 4) | (channels & 0x7);
+ buffer[1] = ((frame->sample_frequency & 0x7) << 2) |
+ (frame->sample_size & 0x3);
+ buffer[2] = frame->coding_type_ext & 0x1f;
+ buffer[3] = frame->channel_allocation;
+ buffer[4] = (frame->level_shift_value & 0xf) << 3;
+
+ if (frame->downmix_inhibit)
+ buffer[4] |= BIT(7);
+}
+
/**
* hdmi_audio_infoframe_pack_only() - write HDMI audio infoframe to binary buffer
* @frame: HDMI audio infoframe
@@ -404,7 +427,6 @@ EXPORT_SYMBOL(hdmi_audio_infoframe_check);
ssize_t hdmi_audio_infoframe_pack_only(const struct hdmi_audio_infoframe *frame,
void *buffer, size_t size)
{
- unsigned char channels;
u8 *ptr = buffer;
size_t length;
int ret;
@@ -420,28 +442,13 @@ ssize_t hdmi_audio_infoframe_pack_only(const struct hdmi_audio_infoframe *frame,
memset(buffer, 0, size);
- if (frame->channels >= 2)
- channels = frame->channels - 1;
- else
- channels = 0;
-
ptr[0] = frame->type;
ptr[1] = frame->version;
ptr[2] = frame->length;
ptr[3] = 0; /* checksum */
- /* start infoframe payload */
- ptr += HDMI_INFOFRAME_HEADER_SIZE;
-
- ptr[0] = ((frame->coding_type & 0xf) << 4) | (channels & 0x7);
- ptr[1] = ((frame->sample_frequency & 0x7) << 2) |
- (frame->sample_size & 0x3);
- ptr[2] = frame->coding_type_ext & 0x1f;
- ptr[3] = frame->channel_allocation;
- ptr[4] = (frame->level_shift_value & 0xf) << 3;
-
- if (frame->downmix_inhibit)
- ptr[4] |= BIT(7);
+ hdmi_audio_infoframe_pack_payload(frame,
+ ptr + HDMI_INFOFRAME_HEADER_SIZE);
hdmi_infoframe_set_checksum(buffer, length);
@@ -479,6 +486,44 @@ ssize_t hdmi_audio_infoframe_pack(struct hdmi_audio_infoframe *frame,
}
EXPORT_SYMBOL(hdmi_audio_infoframe_pack);
+/**
+ * hdmi_audio_infoframe_pack_for_dp - Pack a HDMI Audio infoframe for
+ * displayport
+ *
+ * @frame HDMI Audio infoframe
+ * @sdp secondary data packet for display port. This is filled with the
+ * appropriate data
+ * @dp_version Display Port version to be encoded in the header
+ *
+ * Packs a HDMI Audio Infoframe to be sent over Display Port. This function
+ * fills the secondary data packet to be used for Display Port.
+ *
+ * Return: Number of total written bytes or a negative errno on failure.
+ */
+ssize_t
+hdmi_audio_infoframe_pack_for_dp(const struct hdmi_audio_infoframe *frame,
+ struct dp_sdp *sdp, u8 dp_version)
+{
+ int ret;
+
+ ret = hdmi_audio_infoframe_check(frame);
+ if (ret)
+ return ret;
+
+ memset(sdp->db, 0, sizeof(sdp->db));
+
+ // Secondary-data packet header
+ sdp->sdp_header.HB0 = 0;
+ sdp->sdp_header.HB1 = frame->type;
+ sdp->sdp_header.HB2 = DP_SDP_AUDIO_INFOFRAME_HB2;
+ sdp->sdp_header.HB3 = (dp_version & 0x3f) << 2;
+
+ hdmi_audio_infoframe_pack_payload(frame, sdp->db);
+
+ return frame->length + 4;
+}
+EXPORT_SYMBOL(hdmi_audio_infoframe_pack_for_dp);
+
/**
* hdmi_vendor_infoframe_init() - initialize an HDMI vendor infoframe
* @frame: HDMI vendor infoframe
diff --git a/include/drm/drm_dp_helper.h b/include/drm/drm_dp_helper.h
index 30359e434c3f3..707927e3e773a 100644
--- a/include/drm/drm_dp_helper.h
+++ b/include/drm/drm_dp_helper.h
@@ -1567,6 +1567,8 @@ int drm_dp_bw_code_to_link_rate(u8 link_bw);
#define DP_SDP_VSC_EXT_CEA 0x21 /* DP 1.4 */
/* 0x80+ CEA-861 infoframe types */
+#define DP_SDP_AUDIO_INFOFRAME_HB2 0x1b
+
/**
* struct dp_sdp_header - DP secondary data packet header
* @HB0: Secondary Data Packet ID
diff --git a/include/linux/hdmi.h b/include/linux/hdmi.h
index c8ec982ff4984..2f4dcc8d060e3 100644
--- a/include/linux/hdmi.h
+++ b/include/linux/hdmi.h
@@ -336,7 +336,12 @@ ssize_t hdmi_audio_infoframe_pack(struct hdmi_audio_infoframe *frame,
void *buffer, size_t size);
ssize_t hdmi_audio_infoframe_pack_only(const struct hdmi_audio_infoframe *frame,
void *buffer, size_t size);
-int hdmi_audio_infoframe_check(struct hdmi_audio_infoframe *frame);
+int hdmi_audio_infoframe_check(const struct hdmi_audio_infoframe *frame);
+
+struct dp_sdp;
+ssize_t
+hdmi_audio_infoframe_pack_for_dp(const struct hdmi_audio_infoframe *frame,
+ struct dp_sdp *sdp, u8 dp_version);
enum hdmi_3d_structure {
HDMI_3D_STRUCTURE_INVALID = -1,
--
2.34.1
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next prev parent reply other threads:[~2022-02-18 15:05 UTC|newest]
Thread overview: 63+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-02-18 14:54 [PATCH v8 0/19] drm/mediatek: Add mt8195 DisplayPort driver Guillaume Ranquet
2022-02-18 14:54 ` [PATCH v8 01/19] dt-bindings: mediatek,dpi: Add DP_INTF compatible Guillaume Ranquet
2022-02-18 14:54 ` [PATCH v8 02/19] dt-bindings: mediatek,dp: Add Display Port binding Guillaume Ranquet
2022-02-21 2:36 ` [PATCH v8 02/19] dt-bindings: mediatek, dp: " Rob Herring
2022-02-18 14:54 ` [PATCH v8 03/19] drm/edid: Add cea_sad helpers for freq/length Guillaume Ranquet
2022-02-21 14:30 ` AngeloGioacchino Del Regno
2022-02-25 10:35 ` Guillaume Ranquet
2022-02-18 14:54 ` Guillaume Ranquet [this message]
2022-02-21 14:30 ` [PATCH v8 04/19] video/hdmi: Add audio_infoframe packing for DP AngeloGioacchino Del Regno
2022-02-25 10:38 ` Guillaume Ranquet
2022-02-22 15:16 ` AngeloGioacchino Del Regno
2022-02-25 10:40 ` Guillaume Ranquet
2022-02-18 14:54 ` [PATCH v8 05/19] drm/mediatek: dpi: move dpi limits to board config Guillaume Ranquet
2022-02-21 1:46 ` Chun-Kuang Hu
2022-02-25 10:45 ` Guillaume Ranquet
2022-02-21 14:30 ` AngeloGioacchino Del Regno
2022-02-18 14:54 ` [PATCH v8 06/19] drm/mediatek: dpi: implement a CK/DE pol toggle in " Guillaume Ranquet
2022-02-21 2:14 ` Chun-Kuang Hu
2022-02-25 10:52 ` Guillaume Ranquet
2022-02-21 14:30 ` AngeloGioacchino Del Regno
2022-02-18 14:54 ` [PATCH v8 07/19] drm/mediatek: dpi: implement a swap_input " Guillaume Ranquet
2022-02-21 2:32 ` Chun-Kuang Hu
2022-02-25 10:55 ` Guillaume Ranquet
2022-02-18 14:54 ` [PATCH v8 08/19] drm/mediatek: dpi: move dimension mask to " Guillaume Ranquet
2022-02-21 2:40 ` Chun-Kuang Hu
2022-02-21 2:42 ` Chun-Kuang Hu
2022-02-21 14:30 ` AngeloGioacchino Del Regno
2022-02-18 14:54 ` [PATCH v8 09/19] drm/mediatek: dpi: move dimension_mask " Guillaume Ranquet
2022-02-21 2:43 ` Chun-Kuang Hu
2022-02-21 14:31 ` AngeloGioacchino Del Regno
2022-02-18 14:54 ` [PATCH v8 10/19] drm/mediatek: dpi: move swap_shift " Guillaume Ranquet
2022-02-21 3:24 ` Chun-Kuang Hu
2022-02-25 11:10 ` Guillaume Ranquet
2022-02-21 14:31 ` AngeloGioacchino Del Regno
2022-02-18 14:54 ` [PATCH v8 11/19] drm/mediatek: dpi: move the yuv422_en_bit " Guillaume Ranquet
2022-02-21 3:31 ` Chun-Kuang Hu
2022-02-21 14:31 ` AngeloGioacchino Del Regno
2022-02-18 14:54 ` [PATCH v8 12/19] drm/mediatek: dpi: move the csc_enable bit " Guillaume Ranquet
2022-02-21 3:33 ` Chun-Kuang Hu
2022-02-21 14:31 ` AngeloGioacchino Del Regno
2022-02-18 14:54 ` [PATCH v8 13/19] drm/mediatek: dpi: Add dpintf support Guillaume Ranquet
2022-02-21 4:34 ` Chun-Kuang Hu
2022-02-21 9:44 ` Maxime Ripard
2022-02-25 11:25 ` Guillaume Ranquet
2022-02-21 14:30 ` AngeloGioacchino Del Regno
2022-02-18 14:54 ` [PATCH v8 14/19] phy: phy-mtk-dp: Add driver for DP phy Guillaume Ranquet
2022-02-21 14:31 ` AngeloGioacchino Del Regno
2022-02-25 11:49 ` Guillaume Ranquet
2022-02-25 12:06 ` AngeloGioacchino Del Regno
2022-02-18 14:54 ` [PATCH v8 15/19] drm/mediatek: Add mt8195 Embedded DisplayPort driver Guillaume Ranquet
2022-02-21 14:31 ` AngeloGioacchino Del Regno
2022-02-24 13:57 ` AngeloGioacchino Del Regno
2022-02-25 9:45 ` CK Hu
2022-02-25 13:04 ` Guillaume Ranquet
2022-03-04 2:42 ` CK Hu
2022-02-18 14:54 ` [PATCH v8 16/19] drm/mediatek: Add mt8195 External DisplayPort support Guillaume Ranquet
2022-02-18 14:54 ` [PATCH v8 17/19] drm/mediatek: add hpd debounce Guillaume Ranquet
2022-03-16 6:48 ` Rex-BC Chen
2022-03-18 9:03 ` Wei-Shun Chang
2022-03-21 7:24 ` Rex-BC Chen
2022-02-18 14:54 ` [PATCH v8 18/19] drm/mediatek: change the aux retries times when receiving AUX_DEFER Guillaume Ranquet
2022-03-16 13:35 ` Chen-Yu Tsai
2022-02-18 14:54 ` [PATCH v8 19/19] drm/mediatek: DP audio support for mt8195 Guillaume Ranquet
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