[PATCH v2] drm: exynos: hdmi: sending AVI and AUI info frames
Rahul Sharma
rahul.sharma at samsung.com
Fri Nov 23 04:04:19 PST 2012
This patch adds code for composing AVI and AUI info frames
and send them every VSYNC.
This patch is important for hdmi certification.
v1:
- Remove un-necessary blank lines.
- Change the case of hex constants.
v2:
- Added few blank lines.
- Corrected comments format.
- Added comments for 2's Complement calculation for check sum.
Signed-off-by: Rahul Sharma <rahul.sharma at samsung.com>
Signed-off-by: Fahad Kunnathadi <fahad.k at samsung.com>
Signed-off-by: Shirish S <s.shirish at samsung.com>
---
Based on exynos-drm-next branch of
http://git.kernel.org/?p=linux/kernel/git/daeinki/drm-exynos.git
drivers/gpu/drm/exynos/exynos_hdmi.c | 142 +++++++++++++++++++++++++++++-----
drivers/gpu/drm/exynos/exynos_hdmi.h | 23 ++++++
drivers/gpu/drm/exynos/regs-hdmi.h | 17 ++++-
3 files changed, 161 insertions(+), 21 deletions(-)
diff --git a/drivers/gpu/drm/exynos/exynos_hdmi.c b/drivers/gpu/drm/exynos/exynos_hdmi.c
index 59839cc..af956c7 100644
--- a/drivers/gpu/drm/exynos/exynos_hdmi.c
+++ b/drivers/gpu/drm/exynos/exynos_hdmi.c
@@ -183,6 +183,7 @@ struct hdmi_v13_conf {
int height;
int vrefresh;
bool interlace;
+ int cea_video_id;
const u8 *hdmiphy_data;
const struct hdmi_v13_preset_conf *conf;
};
@@ -354,15 +355,20 @@ static const struct hdmi_v13_preset_conf hdmi_v13_conf_1080p60 = {
};
static const struct hdmi_v13_conf hdmi_v13_confs[] = {
- { 1280, 720, 60, false, hdmiphy_v13_conf74_25, &hdmi_v13_conf_720p60 },
- { 1280, 720, 50, false, hdmiphy_v13_conf74_25, &hdmi_v13_conf_720p60 },
- { 720, 480, 60, false, hdmiphy_v13_conf27_027, &hdmi_v13_conf_480p },
- { 1920, 1080, 50, true, hdmiphy_v13_conf74_25, &hdmi_v13_conf_1080i50 },
- { 1920, 1080, 50, false, hdmiphy_v13_conf148_5,
- &hdmi_v13_conf_1080p50 },
- { 1920, 1080, 60, true, hdmiphy_v13_conf74_25, &hdmi_v13_conf_1080i60 },
- { 1920, 1080, 60, false, hdmiphy_v13_conf148_5,
- &hdmi_v13_conf_1080p60 },
+ { 1280, 720, 60, false, 4, hdmiphy_v13_conf74_25,
+ &hdmi_v13_conf_720p60 },
+ { 1280, 720, 50, false, 19, hdmiphy_v13_conf74_25,
+ &hdmi_v13_conf_720p60 },
+ { 720, 480, 60, false, 3, hdmiphy_v13_conf27_027,
+ &hdmi_v13_conf_480p },
+ { 1920, 1080, 50, true, 20, hdmiphy_v13_conf74_25,
+ &hdmi_v13_conf_1080i50 },
+ { 1920, 1080, 50, false, 31, hdmiphy_v13_conf148_5,
+ &hdmi_v13_conf_1080p50 },
+ { 1920, 1080, 60, true, 5, hdmiphy_v13_conf74_25,
+ &hdmi_v13_conf_1080i60 },
+ { 1920, 1080, 60, false, 16, hdmiphy_v13_conf148_5,
+ &hdmi_v13_conf_1080p60 },
};
/* HDMI Version 1.4 */
@@ -480,6 +486,7 @@ struct hdmi_conf {
int height;
int vrefresh;
bool interlace;
+ int cea_video_id;
const u8 *hdmiphy_data;
const struct hdmi_preset_conf *conf;
};
@@ -935,16 +942,21 @@ static const struct hdmi_preset_conf hdmi_conf_1080p60 = {
};
static const struct hdmi_conf hdmi_confs[] = {
- { 720, 480, 60, false, hdmiphy_conf27_027, &hdmi_conf_480p60 },
- { 1280, 720, 50, false, hdmiphy_conf74_25, &hdmi_conf_720p50 },
- { 1280, 720, 60, false, hdmiphy_conf74_25, &hdmi_conf_720p60 },
- { 1920, 1080, 50, true, hdmiphy_conf74_25, &hdmi_conf_1080i50 },
- { 1920, 1080, 60, true, hdmiphy_conf74_25, &hdmi_conf_1080i60 },
- { 1920, 1080, 30, false, hdmiphy_conf74_176, &hdmi_conf_1080p30 },
- { 1920, 1080, 50, false, hdmiphy_conf148_5, &hdmi_conf_1080p50 },
- { 1920, 1080, 60, false, hdmiphy_conf148_5, &hdmi_conf_1080p60 },
+ { 720, 480, 60, false, 3, hdmiphy_conf27_027, &hdmi_conf_480p60 },
+ { 1280, 720, 50, false, 19, hdmiphy_conf74_25, &hdmi_conf_720p50 },
+ { 1280, 720, 60, false, 4, hdmiphy_conf74_25, &hdmi_conf_720p60 },
+ { 1920, 1080, 50, true, 20, hdmiphy_conf74_25, &hdmi_conf_1080i50 },
+ { 1920, 1080, 60, true, 5, hdmiphy_conf74_25, &hdmi_conf_1080i60 },
+ { 1920, 1080, 30, false, 34, hdmiphy_conf74_176, &hdmi_conf_1080p30 },
+ { 1920, 1080, 50, false, 31, hdmiphy_conf148_5, &hdmi_conf_1080p50 },
+ { 1920, 1080, 60, false, 16, hdmiphy_conf148_5, &hdmi_conf_1080p60 },
};
+struct hdmi_infoframe {
+ enum HDMI_PACKET_TYPE type;
+ u8 ver;
+ u8 len;
+};
static inline u32 hdmi_reg_read(struct hdmi_context *hdata, u32 reg_id)
{
@@ -1268,6 +1280,88 @@ static int hdmi_conf_index(struct hdmi_context *hdata,
return hdmi_v14_conf_index(mode);
}
+static u8 hdmi_chksum(struct hdmi_context *hdata,
+ u32 start, u8 len, u32 hdr_sum)
+{
+ int i;
+
+ /* hdr_sum : header0 + header1 + header2
+ * start : start address of packet byte1
+ * len : packet bytes - 1 */
+ for (i = 0; i < len; ++i)
+ hdr_sum += 0xff & hdmi_reg_read(hdata, start + i * 4);
+
+ /* return 2's complement of 8 bit hdr_sum */
+ return (u8)(~(hdr_sum & 0xff) + 1);
+}
+
+void hdmi_reg_infoframe(struct hdmi_context *hdata,
+ struct hdmi_infoframe *infoframe)
+{
+ u32 hdr_sum;
+ u8 chksum;
+ u32 aspect_ratio;
+ u32 mod;
+ u32 vic;
+
+ DRM_DEBUG_KMS("[%d] %s\n", __LINE__, __func__);
+
+ mod = hdmi_reg_read(hdata, HDMI_MODE_SEL);
+ if (hdata->dvi_mode) {
+ hdmi_reg_writeb(hdata, HDMI_VSI_CON,
+ HDMI_VSI_CON_DO_NOT_TRANSMIT);
+ hdmi_reg_writeb(hdata, HDMI_AVI_CON,
+ HDMI_AVI_CON_DO_NOT_TRANSMIT);
+ hdmi_reg_writeb(hdata, HDMI_AUI_CON, HDMI_AUI_CON_NO_TRAN);
+ return;
+ }
+
+ switch (infoframe->type) {
+ case HDMI_PACKET_TYPE_AVI:
+ hdmi_reg_writeb(hdata, HDMI_AVI_CON, HDMI_AVI_CON_EVERY_VSYNC);
+ hdmi_reg_writeb(hdata, HDMI_AVI_HEADER0, infoframe->type);
+ hdmi_reg_writeb(hdata, HDMI_AVI_HEADER1, infoframe->ver);
+ hdmi_reg_writeb(hdata, HDMI_AVI_HEADER2, infoframe->len);
+ hdr_sum = infoframe->type + infoframe->ver + infoframe->len;
+
+ /* Output format zero hardcoded ,RGB YBCR selection */
+ hdmi_reg_writeb(hdata, HDMI_AVI_BYTE(1), 0 << 5 |
+ AVI_ACTIVE_FORMAT_VALID |
+ AVI_UNDERSCANNED_DISPLAY_VALID);
+
+ aspect_ratio = AVI_PIC_ASPECT_RATIO_16_9;
+
+ hdmi_reg_writeb(hdata, HDMI_AVI_BYTE(2), aspect_ratio |
+ AVI_SAME_AS_PIC_ASPECT_RATIO);
+
+ if (hdata->type == HDMI_TYPE13)
+ vic = hdmi_v13_confs[hdata->cur_conf].cea_video_id;
+ else
+ vic = hdmi_confs[hdata->cur_conf].cea_video_id;
+
+ hdmi_reg_writeb(hdata, HDMI_AVI_BYTE(4), vic);
+
+ chksum = hdmi_chksum(hdata, HDMI_AVI_BYTE(1),
+ infoframe->len, hdr_sum);
+ DRM_DEBUG_KMS("AVI checksum = 0x%x\n", chksum);
+ hdmi_reg_writeb(hdata, HDMI_AVI_CHECK_SUM, chksum);
+ break;
+ case HDMI_PACKET_TYPE_AUI:
+ hdmi_reg_writeb(hdata, HDMI_AUI_CON, 0x02);
+ hdmi_reg_writeb(hdata, HDMI_AUI_HEADER0, infoframe->type);
+ hdmi_reg_writeb(hdata, HDMI_AUI_HEADER1, infoframe->ver);
+ hdmi_reg_writeb(hdata, HDMI_AUI_HEADER2, infoframe->len);
+ hdr_sum = infoframe->type + infoframe->ver + infoframe->len;
+ chksum = hdmi_chksum(hdata, HDMI_AUI_BYTE(1),
+ infoframe->len, hdr_sum);
+ DRM_DEBUG_KMS("AUI checksum = 0x%x\n", chksum);
+ hdmi_reg_writeb(hdata, HDMI_AUI_CHECK_SUM, chksum);
+ break;
+ default:
+ break;
+ }
+}
+
static bool hdmi_is_connected(void *ctx)
{
struct hdmi_context *hdata = ctx;
@@ -1543,6 +1637,8 @@ static void hdmi_conf_reset(struct hdmi_context *hdata)
static void hdmi_conf_init(struct hdmi_context *hdata)
{
+ struct hdmi_infoframe infoframe;
+
/* disable HPD interrupts */
hdmi_reg_writemask(hdata, HDMI_INTC_CON, 0, HDMI_INTC_EN_GLOBAL |
HDMI_INTC_EN_HPD_PLUG | HDMI_INTC_EN_HPD_UNPLUG);
@@ -1577,9 +1673,17 @@ static void hdmi_conf_init(struct hdmi_context *hdata)
hdmi_reg_writeb(hdata, HDMI_V13_AUI_CON, 0x02);
hdmi_reg_writeb(hdata, HDMI_V13_ACR_CON, 0x04);
} else {
+ infoframe.type = HDMI_PACKET_TYPE_AVI;
+ infoframe.ver = HDMI_AVI_VERSION;
+ infoframe.len = HDMI_AVI_LENGTH;
+ hdmi_reg_infoframe(hdata, &infoframe);
+
+ infoframe.type = HDMI_PACKET_TYPE_AUI;
+ infoframe.ver = HDMI_AUI_VERSION;
+ infoframe.len = HDMI_AUI_LENGTH;
+ hdmi_reg_infoframe(hdata, &infoframe);
+
/* enable AVI packet every vsync, fixes purple line problem */
- hdmi_reg_writeb(hdata, HDMI_AVI_CON, 0x02);
- hdmi_reg_writeb(hdata, HDMI_AVI_BYTE(1), 2 << 5);
hdmi_reg_writemask(hdata, HDMI_CON_1, 2, 3 << 5);
}
}
diff --git a/drivers/gpu/drm/exynos/exynos_hdmi.h b/drivers/gpu/drm/exynos/exynos_hdmi.h
index 1c3b6d8..315f53c 100644
--- a/drivers/gpu/drm/exynos/exynos_hdmi.h
+++ b/drivers/gpu/drm/exynos/exynos_hdmi.h
@@ -28,6 +28,29 @@
#ifndef _EXYNOS_HDMI_H_
#define _EXYNOS_HDMI_H_
+/* AVI header and aspect ratio */
+#define HDMI_AVI_VERSION 0x02
+#define HDMI_AVI_LENGTH 0x0D
+#define AVI_PIC_ASPECT_RATIO_16_9 (2 << 4)
+#define AVI_SAME_AS_PIC_ASPECT_RATIO 8
+
+/* AUI header info */
+#define HDMI_AUI_VERSION 0x01
+#define HDMI_AUI_LENGTH 0x0A
+
+/* HDMI infoframe to configure HDMI out packet header, AUI and AVI */
+enum HDMI_PACKET_TYPE {
+ /* refer to Table 5-8 Packet Type in HDMI specification v1.4a */
+ /* InfoFrame packet type */
+ HDMI_PACKET_TYPE_INFOFRAME = 0X80,
+ /* Vendor-Specific InfoFrame */
+ HDMI_PACKET_TYPE_VSI = HDMI_PACKET_TYPE_INFOFRAME + 1,
+ /* Auxiliary Video information InfoFrame */
+ HDMI_PACKET_TYPE_AVI = HDMI_PACKET_TYPE_INFOFRAME + 2,
+ /* Audio information InfoFrame */
+ HDMI_PACKET_TYPE_AUI = HDMI_PACKET_TYPE_INFOFRAME + 4
+};
+
void hdmi_attach_ddc_client(struct i2c_client *ddc);
void hdmi_attach_hdmiphy_client(struct i2c_client *hdmiphy);
diff --git a/drivers/gpu/drm/exynos/regs-hdmi.h b/drivers/gpu/drm/exynos/regs-hdmi.h
index 9cc7c5e..970cdb5 100644
--- a/drivers/gpu/drm/exynos/regs-hdmi.h
+++ b/drivers/gpu/drm/exynos/regs-hdmi.h
@@ -298,14 +298,14 @@
#define HDMI_AVI_HEADER1 HDMI_CORE_BASE(0x0714)
#define HDMI_AVI_HEADER2 HDMI_CORE_BASE(0x0718)
#define HDMI_AVI_CHECK_SUM HDMI_CORE_BASE(0x071C)
-#define HDMI_AVI_BYTE(n) HDMI_CORE_BASE(0x0720 + 4 * (n))
+#define HDMI_AVI_BYTE(n) HDMI_CORE_BASE(0x0720 + 4 * (n-1))
#define HDMI_AUI_CON HDMI_CORE_BASE(0x0800)
#define HDMI_AUI_HEADER0 HDMI_CORE_BASE(0x0810)
#define HDMI_AUI_HEADER1 HDMI_CORE_BASE(0x0814)
#define HDMI_AUI_HEADER2 HDMI_CORE_BASE(0x0818)
#define HDMI_AUI_CHECK_SUM HDMI_CORE_BASE(0x081C)
-#define HDMI_AUI_BYTE(n) HDMI_CORE_BASE(0x0820 + 4 * (n))
+#define HDMI_AUI_BYTE(n) HDMI_CORE_BASE(0x0820 + 4 * (n-1))
#define HDMI_MPG_CON HDMI_CORE_BASE(0x0900)
#define HDMI_MPG_CHECK_SUM HDMI_CORE_BASE(0x091C)
@@ -338,6 +338,19 @@
#define HDMI_AN_SEED_2 HDMI_CORE_BASE(0x0E60)
#define HDMI_AN_SEED_3 HDMI_CORE_BASE(0x0E64)
+/* AVI bit definition */
+#define HDMI_AVI_CON_DO_NOT_TRANSMIT (0 << 1)
+#define HDMI_AVI_CON_EVERY_VSYNC (1 << 1)
+
+#define AVI_ACTIVE_FORMAT_VALID (1 << 4)
+#define AVI_UNDERSCANNED_DISPLAY_VALID (1 << 1)
+
+/* AUI bit definition */
+#define HDMI_AUI_CON_NO_TRAN (0 << 0)
+
+/* VSI bit definition */
+#define HDMI_VSI_CON_DO_NOT_TRANSMIT (0 << 0)
+
/* HDCP related registers */
#define HDMI_HDCP_SHA1(n) HDMI_CORE_BASE(0x7000 + 4 * (n))
#define HDMI_HDCP_KSV_LIST(n) HDMI_CORE_BASE(0x7050 + 4 * (n))
--
1.7.0.4
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