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drm/nouveau/hdmi: enable sending of avi/audio infoframes 

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
This commit is contained in:
Ben Skeggs 2011-10-05 14:59:14 +10:00
parent 52c7bcdb67
commit b2337f2333
1 changed files with 103 additions and 0 deletions
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103
drivers/gpu/drm/nouveau/nouveau_hdmi.c
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@ -110,10 +110,107 @@ nouveau_audio_mode_set(struct drm_encoder *encoder,
}
}
static void
nouveau_hdmi_infoframe(struct drm_encoder *encoder, u32 ctrl, u8 *frame)
{
/* calculate checksum for the infoframe */
u8 sum = 0, i;
for (i = 0; i < frame[2]; i++)
sum += frame[i];
frame[3] = 256 - sum;
/* disable infoframe, and write header */
hdmi_mask(encoder, ctrl + 0x00, 0x00000001, 0x00000000);
hdmi_wr32(encoder, ctrl + 0x08, *(u32 *)frame & 0xffffff);
/* register scans tell me the audio infoframe has only one set of
* subpack regs, according to tegra (gee nvidia, it'd be nice if we
* could get those docs too!), the hdmi block pads out the rest of
* the packet on its own.
*/
if (ctrl == 0x020)
frame[2] = 6;
/* write out checksum and data, weird weird 7 byte register pairs */
for (i = 0; i < frame[2] + 1; i += 7) {
u32 rsubpack = ctrl + 0x0c + ((i / 7) * 8);
u32 *subpack = (u32 *)&frame[3 + i];
hdmi_wr32(encoder, rsubpack + 0, subpack[0]);
hdmi_wr32(encoder, rsubpack + 4, subpack[1] & 0xffffff);
}
/* enable the infoframe */
hdmi_mask(encoder, ctrl, 0x00000001, 0x00000001);
}
static void
nouveau_hdmi_video_infoframe(struct drm_encoder *encoder,
struct drm_display_mode *mode)
{
const u8 Y = 0, A = 0, B = 0, S = 0, C = 0, M = 0, R = 0;
const u8 ITC = 0, EC = 0, Q = 0, SC = 0, VIC = 0, PR = 0;
const u8 bar_top = 0, bar_bottom = 0, bar_left = 0, bar_right = 0;
u8 frame[20];
frame[0x00] = 0x82; /* AVI infoframe */
frame[0x01] = 0x02; /* version */
frame[0x02] = 0x0d; /* length */
frame[0x03] = 0x00;
frame[0x04] = (Y << 5) | (A << 4) | (B << 2) | S;
frame[0x05] = (C << 6) | (M << 4) | R;
frame[0x06] = (ITC << 7) | (EC << 4) | (Q << 2) | SC;
frame[0x07] = VIC;
frame[0x08] = PR;
frame[0x09] = bar_top & 0xff;
frame[0x0a] = bar_top >> 8;
frame[0x0b] = bar_bottom & 0xff;
frame[0x0c] = bar_bottom >> 8;
frame[0x0d] = bar_left & 0xff;
frame[0x0e] = bar_left >> 8;
frame[0x0f] = bar_right & 0xff;
frame[0x10] = bar_right >> 8;
frame[0x11] = 0x00;
frame[0x12] = 0x00;
frame[0x13] = 0x00;
nouveau_hdmi_infoframe(encoder, 0x020, frame);
}
static void
nouveau_hdmi_audio_infoframe(struct drm_encoder *encoder,
struct drm_display_mode *mode)
{
const u8 CT = 0x00, CC = 0x01, ceaSS = 0x00, SF = 0x00, FMT = 0x00;
const u8 CA = 0x00, DM_INH = 0, LSV = 0x00;
u8 frame[12];
frame[0x00] = 0x84; /* Audio infoframe */
frame[0x01] = 0x01; /* version */
frame[0x02] = 0x0a; /* length */
frame[0x03] = 0x00;
frame[0x04] = (CT << 4) | CC;
frame[0x05] = (SF << 2) | ceaSS;
frame[0x06] = FMT;
frame[0x07] = CA;
frame[0x08] = (DM_INH << 7) | (LSV << 3);
frame[0x09] = 0x00;
frame[0x0a] = 0x00;
frame[0x0b] = 0x00;
nouveau_hdmi_infoframe(encoder, 0x000, frame);
}
static void
nouveau_hdmi_disconnect(struct drm_encoder *encoder)
{
nouveau_audio_disconnect(encoder);
/* disable audio and avi infoframes */
hdmi_mask(encoder, 0x000, 0x00000001, 0x00000000);
hdmi_mask(encoder, 0x020, 0x00000001, 0x00000000);
/* disable hdmi */
hdmi_mask(encoder, 0x0a4, 0x40000000, 0x00000000);
}
void
@ -130,5 +227,11 @@ nouveau_hdmi_mode_set(struct drm_encoder *encoder,
return;
}
/* enable hdmi */
hdmi_mask(encoder, 0x0a4, 0x40000000, 0x40000000);
nouveau_hdmi_video_infoframe(encoder, mode);
nouveau_hdmi_audio_infoframe(encoder, mode);
nouveau_audio_mode_set(encoder, mode);
}