redonkable/alistair23-linux
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drm/sti: add HDMI vendor specific infoframe

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Vendor specific infoframe is mandatory for 4K2K resolution.
Without this, the HDMI protocol compliance fails.

Signed-off-by: Vincent Abriou <vincent.abriou@st.com>
Reviewed-by: Benjamin Gaignard <benjamin.gaignard@linaro.org>
This commit is contained in:
Vincent Abriou 2016-02-01 10:35:26 +01:00
parent 181975a2dc
commit e42e7bd7ee
1 changed files with 73 additions and 9 deletions
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82
drivers/gpu/drm/sti/sti_hdmi.c
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@ -51,9 +51,18 @@
#define HDMI_SW_DI_2_PKT_WORD4 0x0614
#define HDMI_SW_DI_2_PKT_WORD5 0x0618
#define HDMI_SW_DI_2_PKT_WORD6 0x061C
#define HDMI_SW_DI_3_HEAD_WORD 0x0620
#define HDMI_SW_DI_3_PKT_WORD0 0x0624
#define HDMI_SW_DI_3_PKT_WORD1 0x0628
#define HDMI_SW_DI_3_PKT_WORD2 0x062C
#define HDMI_SW_DI_3_PKT_WORD3 0x0630
#define HDMI_SW_DI_3_PKT_WORD4 0x0634
#define HDMI_SW_DI_3_PKT_WORD5 0x0638
#define HDMI_SW_DI_3_PKT_WORD6 0x063C
#define HDMI_IFRAME_SLOT_AVI 1
#define HDMI_IFRAME_SLOT_AUDIO 2
#define HDMI_IFRAME_SLOT_VENDOR 3
#define XCAT(prefix, x, suffix) prefix ## x ## suffix
#define HDMI_SW_DI_N_HEAD_WORD(x) XCAT(HDMI_SW_DI_, x, _HEAD_WORD)
@ -264,6 +273,10 @@ static void hdmi_infoframe_reset(struct sti_hdmi *hdmi,
head_offset = HDMI_SW_DI_N_HEAD_WORD(HDMI_IFRAME_SLOT_AUDIO);
pack_offset = HDMI_SW_DI_N_PKT_WORD0(HDMI_IFRAME_SLOT_AUDIO);
break;
case HDMI_IFRAME_SLOT_VENDOR:
head_offset = HDMI_SW_DI_N_HEAD_WORD(HDMI_IFRAME_SLOT_VENDOR);
pack_offset = HDMI_SW_DI_N_PKT_WORD0(HDMI_IFRAME_SLOT_VENDOR);
break;
default:
DRM_ERROR("unsupported infoframe slot: %#x\n", slot);
return;
@ -305,12 +318,13 @@ static inline unsigned int hdmi_infoframe_subpack(const u8 *ptr, size_t size)
* @data: infoframe to write
* @size: size to write
*/
static void hdmi_infoframe_write_infopack(struct sti_hdmi *hdmi, const u8 *data)
static void hdmi_infoframe_write_infopack(struct sti_hdmi *hdmi,
const u8 *data,
size_t size)
{
const u8 *ptr = data;
u32 val, slot, mode, i;
u32 head_offset, pack_offset;
size_t size;
switch (*ptr) {
case HDMI_INFOFRAME_TYPE_AVI:
@ -318,17 +332,19 @@ static void hdmi_infoframe_write_infopack(struct sti_hdmi *hdmi, const u8 *data)
mode = HDMI_IFRAME_FIELD;
head_offset = HDMI_SW_DI_N_HEAD_WORD(HDMI_IFRAME_SLOT_AVI);
pack_offset = HDMI_SW_DI_N_PKT_WORD0(HDMI_IFRAME_SLOT_AVI);
size = HDMI_AVI_INFOFRAME_SIZE;
break;
case HDMI_INFOFRAME_TYPE_AUDIO:
slot = HDMI_IFRAME_SLOT_AUDIO;
mode = HDMI_IFRAME_FRAME;
head_offset = HDMI_SW_DI_N_HEAD_WORD(HDMI_IFRAME_SLOT_AUDIO);
pack_offset = HDMI_SW_DI_N_PKT_WORD0(HDMI_IFRAME_SLOT_AUDIO);
size = HDMI_AUDIO_INFOFRAME_SIZE;
break;
case HDMI_INFOFRAME_TYPE_VENDOR:
slot = HDMI_IFRAME_SLOT_VENDOR;
mode = HDMI_IFRAME_FRAME;
head_offset = HDMI_SW_DI_N_HEAD_WORD(HDMI_IFRAME_SLOT_VENDOR);
pack_offset = HDMI_SW_DI_N_PKT_WORD0(HDMI_IFRAME_SLOT_VENDOR);
break;
default:
DRM_ERROR("unsupported infoframe type: %#x\n", *ptr);
return;
@ -347,8 +363,9 @@ static void hdmi_infoframe_write_infopack(struct sti_hdmi *hdmi, const u8 *data)
/*
* Each subpack contains 4 bytes
* The First Bytes of the first subpacket must contain the checksum
* Packet size in increase by one.
* Packet size is increase by one.
*/
size = size - HDMI_INFOFRAME_HEADER_SIZE + 1;
for (i = 0; i < size; i += sizeof(u32)) {
size_t num;
@ -401,7 +418,7 @@ static int hdmi_avi_infoframe_config(struct sti_hdmi *hdmi)
return ret;
}
hdmi_infoframe_write_infopack(hdmi, buffer);
hdmi_infoframe_write_infopack(hdmi, buffer, ret);
return 0;
}
@ -437,7 +454,49 @@ static int hdmi_audio_infoframe_config(struct sti_hdmi *hdmi)
return ret;
}
hdmi_infoframe_write_infopack(hdmi, buffer);
hdmi_infoframe_write_infopack(hdmi, buffer, ret);
return 0;
}
/*
* Prepare and configure the VS infoframe
*
* Vendor Specific infoframe are transmitted once per frame and
* contains vendor specific information.
*
* @hdmi: pointer on the hdmi internal structure
*
* Return negative value if error occurs
*/
#define HDMI_VENDOR_INFOFRAME_MAX_SIZE 6
static int hdmi_vendor_infoframe_config(struct sti_hdmi *hdmi)
{
struct drm_display_mode *mode = &hdmi->mode;
struct hdmi_vendor_infoframe infoframe;
u8 buffer[HDMI_INFOFRAME_HEADER_SIZE + HDMI_VENDOR_INFOFRAME_MAX_SIZE];
int ret;
DRM_DEBUG_DRIVER("\n");
ret = drm_hdmi_vendor_infoframe_from_display_mode(&infoframe, mode);
if (ret < 0) {
/*
* Going into that statement does not means vendor infoframe
* fails. It just informed us that vendor infoframe is not
* needed for the selected mode. Only 4k or stereoscopic 3D
* mode requires vendor infoframe. So just simply return 0.
*/
return 0;
}
ret = hdmi_vendor_infoframe_pack(&infoframe, buffer, sizeof(buffer));
if (ret < 0) {
DRM_ERROR("failed to pack VS infoframe: %d\n", ret);
return ret;
}
hdmi_infoframe_write_infopack(hdmi, buffer, ret);
return 0;
}
@ -510,6 +569,7 @@ static void sti_hdmi_disable(struct drm_bridge *bridge)
/* Reset info frame transmission */
hdmi_infoframe_reset(hdmi, HDMI_IFRAME_SLOT_AVI);
hdmi_infoframe_reset(hdmi, HDMI_IFRAME_SLOT_AUDIO);
hdmi_infoframe_reset(hdmi, HDMI_IFRAME_SLOT_VENDOR);
/* Set the default channel data to be a dark red */
hdmi_write(hdmi, 0x0000, HDMI_DFLT_CHL0_DAT);
@ -566,6 +626,10 @@ static void sti_hdmi_pre_enable(struct drm_bridge *bridge)
if (hdmi_audio_infoframe_config(hdmi))
DRM_ERROR("Unable to configure AUDIO infoframe\n");
/* Program VS infoframe */
if (hdmi_vendor_infoframe_config(hdmi))
DRM_ERROR("Unable to configure VS infoframe\n");
/* Sw reset */
hdmi_swreset(hdmi);
}