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drm/sti: reset infoframe transmission when HDMI is stopped

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Clear all infoframe registers when the HDMI link is stopped.

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 10:32:42 +01:00
parent 50f2138a1c
commit 181975a2dc
1 changed files with 43 additions and 0 deletions
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43
drivers/gpu/drm/sti/sti_hdmi.c
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@ -65,6 +65,8 @@
#define HDMI_SW_DI_N_PKT_WORD5(x) XCAT(HDMI_SW_DI_, x, _PKT_WORD5)
#define HDMI_SW_DI_N_PKT_WORD6(x) XCAT(HDMI_SW_DI_, x, _PKT_WORD6)
#define HDMI_SW_DI_MAX_WORD 7
#define HDMI_IFRAME_DISABLED 0x0
#define HDMI_IFRAME_SINGLE_SHOT 0x1
#define HDMI_IFRAME_FIELD 0x2
@ -241,6 +243,43 @@ static void hdmi_config(struct sti_hdmi *hdmi)
hdmi_write(hdmi, conf, HDMI_CFG);
}
/*
* Helper to reset info frame
*
* @hdmi: pointer on the hdmi internal structure
* @slot: infoframe to reset
*/
static void hdmi_infoframe_reset(struct sti_hdmi *hdmi,
u32 slot)
{
u32 val, i;
u32 head_offset, pack_offset;
switch (slot) {
case HDMI_IFRAME_SLOT_AVI:
head_offset = HDMI_SW_DI_N_HEAD_WORD(HDMI_IFRAME_SLOT_AVI);
pack_offset = HDMI_SW_DI_N_PKT_WORD0(HDMI_IFRAME_SLOT_AVI);
break;
case HDMI_IFRAME_SLOT_AUDIO:
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;
default:
DRM_ERROR("unsupported infoframe slot: %#x\n", slot);
return;
}
/* Disable transmission for the selected slot */
val = hdmi_read(hdmi, HDMI_SW_DI_CFG);
val &= ~HDMI_IFRAME_CFG_DI_N(HDMI_IFRAME_MASK, slot);
hdmi_write(hdmi, val, HDMI_SW_DI_CFG);
/* Reset info frame registers */
hdmi_write(hdmi, 0x0, head_offset);
for (i = 0; i < HDMI_SW_DI_MAX_WORD; i += sizeof(u32))
hdmi_write(hdmi, 0x0, pack_offset + i);
}
/**
* Helper to concatenate infoframe in 32 bits word
*
@ -468,6 +507,10 @@ static void sti_hdmi_disable(struct drm_bridge *bridge)
/* Stop the phy */
hdmi->phy_ops->stop(hdmi);
/* Reset info frame transmission */
hdmi_infoframe_reset(hdmi, HDMI_IFRAME_SLOT_AVI);
hdmi_infoframe_reset(hdmi, HDMI_IFRAME_SLOT_AUDIO);
/* Set the default channel data to be a dark red */
hdmi_write(hdmi, 0x0000, HDMI_DFLT_CHL0_DAT);
hdmi_write(hdmi, 0x0000, HDMI_DFLT_CHL1_DAT);