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drm/exynos: sending AVI and AUI info frames
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This patch adds code for composing AVI and AUI info frames
and send them every VSYNC.

This patch is important for hdmi certification.

v3:
- Moved enums, macros to exynos_hdmi.c.
- Corrected hex format.
- Added static to hdmi_reg_infoframe.

v2:
- Added few blank lines.
- Corrected comments format.
- Added comments for 2's Complement calculation for check sum.

v1:
- Remove un-necessary blank lines.
- Change the case of hex constants.

Signed-off-by: Rahul Sharma <rahul.sharma@samsung.com>
Signed-off-by: Fahad Kunnathadi <fahad.k@samsung.com>
Signed-off-by: Shirish S <s.shirish@samsung.com>
Acked-by: Seung-Woo Kim <sw0312.kim@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
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Rahul Sharma authored and Inki Dae committed Dec 5, 2012
1 parent a4d8de5 commit a144c2e
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Showing 2 changed files with 161 additions and 21 deletions.
165 changes: 146 additions & 19 deletions drivers/gpu/drm/exynos/exynos_hdmi.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -50,6 +50,29 @@
#define MAX_HEIGHT 1080
#define get_hdmi_context(dev) platform_get_drvdata(to_platform_device(dev))

/* 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
};

enum hdmi_type {
HDMI_TYPE13,
HDMI_TYPE14,
Expand Down Expand Up @@ -182,6 +205,7 @@ 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;
};
Expand Down Expand Up @@ -353,15 +377,20 @@ 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 */
Expand Down Expand Up @@ -479,6 +508,7 @@ struct hdmi_conf {
int height;
int vrefresh;
bool interlace;
int cea_video_id;
const u8 *hdmiphy_data;
const struct hdmi_preset_conf *conf;
};
Expand Down Expand Up @@ -934,16 +964,21 @@ 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)
{
Expand Down Expand Up @@ -1267,6 +1302,88 @@ 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);
}

static 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;
Expand Down Expand Up @@ -1542,6 +1659,8 @@ 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);
Expand Down Expand Up @@ -1576,9 +1695,17 @@ 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);
}
}
Expand Down
17 changes: 15 additions & 2 deletions drivers/gpu/drm/exynos/regs-hdmi.h
View file
Original file line number Diff line number Diff line change
Expand Up @@ -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)
Expand Down Expand Up @@ -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))
Expand Down

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