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Message-id: <1511968368-30884-2-git-send-email-m.purski@samsung.com>
Date: Wed, 29 Nov 2017 16:12:48 +0100
From: Maciej Purski <m.purski@...sung.com>
To: dri-devel@...ts.freedesktop.org
Cc: Archit Taneja <architt@...eaurora.org>,
Andrzej Hajda <a.hajda@...sung.com>,
Laurent Pinchart <Laurent.pinchart@...asonboard.com>,
David Airlie <airlied@...ux.ie>,
Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
Marek Szyprowski <m.szyprowski@...sung.com>,
linux-kernel@...r.kernel.org, Maciej Purski <m.purski@...sung.com>
Subject: [PATCH 2/2] drm/bridge/sii8620: fix HDMI cable connection to dongle
MHL bridge is usually connected to TV via MHL dongle. Currently plugging
HDMI cable to dongle is handled improperly. This patch fixes it.
Signed-off-by: Maciej Purski <m.purski@...sung.com>
---
drivers/gpu/drm/bridge/sil-sii8620.c | 49 ++++++++++++++++++++----------------
1 file changed, 27 insertions(+), 22 deletions(-)
diff --git a/drivers/gpu/drm/bridge/sil-sii8620.c b/drivers/gpu/drm/bridge/sil-sii8620.c
index 35ccc90..857d2cb5 100644
--- a/drivers/gpu/drm/bridge/sil-sii8620.c
+++ b/drivers/gpu/drm/bridge/sil-sii8620.c
@@ -78,6 +78,7 @@ struct sii8620 {
u8 devcap[MHL_DCAP_SIZE];
u8 xdevcap[MHL_XDC_SIZE];
u8 avif[HDMI_INFOFRAME_SIZE(AVI)];
+ bool feature_complete;
struct edid *edid;
unsigned int gen2_write_burst:1;
enum sii8620_mt_state mt_state;
@@ -470,7 +471,7 @@ static void sii8620_update_array(u8 *dst, u8 *src, int count)
}
}
-static void sii8620_sink_detected(struct sii8620 *ctx, int ret)
+static void sii8620_hpd_plugged(struct sii8620 *ctx)
{
static const char * const sink_str[] = {
[SINK_NONE] = "NONE",
@@ -481,15 +482,13 @@ static void sii8620_sink_detected(struct sii8620 *ctx, int ret)
char sink_name[20];
struct device *dev = ctx->dev;
- if (ret < 0)
- return;
-
sii8620_fetch_edid(ctx);
if (!ctx->edid) {
dev_err(ctx->dev, "Cannot fetch EDID\n");
sii8620_mhl_disconnected(ctx);
return;
}
+ sii8620_set_upstream_edid(ctx);
if (drm_detect_hdmi_monitor(ctx->edid))
ctx->sink_type = SINK_HDMI;
@@ -502,15 +501,6 @@ static void sii8620_sink_detected(struct sii8620 *ctx, int ret)
sink_str[ctx->sink_type], sink_name);
}
-static void sii8620_edid_read(struct sii8620 *ctx, int ret)
-{
- if (ret < 0)
- return;
-
- sii8620_set_upstream_edid(ctx);
- sii8620_enable_hpd(ctx);
-}
-
static void sii8620_mr_devcap(struct sii8620 *ctx)
{
u8 dcap[MHL_DCAP_SIZE];
@@ -1490,6 +1480,15 @@ static void sii8620_set_mode(struct sii8620 *ctx, enum sii8620_mode mode)
);
}
+static void sii8620_hpd_unplugged(struct sii8620 *ctx)
+{
+ sii8620_disable_hpd(ctx);
+ ctx->sink_type = SINK_NONE;
+ ctx->feature_complete = false;
+ kfree(ctx->edid);
+ ctx->edid = NULL;
+}
+
static void sii8620_disconnect(struct sii8620 *ctx)
{
sii8620_disable_gen2_write_burst(ctx);
@@ -1517,7 +1516,7 @@ static void sii8620_disconnect(struct sii8620 *ctx)
REG_MHL_DP_CTL6, 0x2A,
REG_MHL_DP_CTL7, 0x03
);
- sii8620_disable_hpd(ctx);
+ sii8620_hpd_unplugged(ctx);
sii8620_write_seq_static(ctx,
REG_M3_CTRL, VAL_M3_CTRL_MHL3_VALUE,
REG_MHL_COC_CTL1, 0x07,
@@ -1566,9 +1565,6 @@ static void sii8620_disconnect(struct sii8620 *ctx)
memset(ctx->devcap, 0, sizeof(ctx->devcap));
memset(ctx->xdevcap, 0, sizeof(ctx->xdevcap));
ctx->cbus_status = 0;
- ctx->sink_type = SINK_NONE;
- kfree(ctx->edid);
- ctx->edid = NULL;
sii8620_mt_cleanup(ctx);
}
@@ -1661,7 +1657,6 @@ static void sii8620_status_changed_path(struct sii8620 *ctx)
| MHL_DST_LM_PATH_ENABLED);
if (!sii8620_is_mhl3(ctx))
sii8620_mt_read_devcap(ctx, false);
- sii8620_mt_set_cont(ctx, sii8620_sink_detected);
} else {
sii8620_mt_write_stat(ctx, MHL_DST_REG(LINK_MODE),
MHL_DST_LM_CLK_MODE_NORMAL);
@@ -1764,8 +1759,11 @@ static void sii8620_msc_mr_set_int(struct sii8620 *ctx)
}
if (ints[MHL_INT_RCHANGE] & MHL_INT_RC_FEAT_REQ)
sii8620_send_features(ctx);
- if (ints[MHL_INT_RCHANGE] & MHL_INT_RC_FEAT_COMPLETE)
- sii8620_edid_read(ctx, 0);
+ if (ints[MHL_INT_RCHANGE] & MHL_INT_RC_FEAT_COMPLETE) {
+ ctx->feature_complete = true;
+ if (ctx->edid)
+ sii8620_enable_hpd(ctx);
+ }
}
static struct sii8620_mt_msg *sii8620_msc_msg_first(struct sii8620 *ctx)
@@ -1840,6 +1838,13 @@ static void sii8620_irq_msc(struct sii8620 *ctx)
if (stat & BIT_CBUS_MSC_MR_WRITE_STAT)
sii8620_msc_mr_write_stat(ctx);
+ if (stat & BIT_CBUS_HPD_CHG) {
+ if (ctx->cbus_status & BIT_CBUS_STATUS_CBUS_HPD)
+ sii8620_hpd_plugged(ctx);
+ else
+ sii8620_hpd_unplugged(ctx);
+ }
+
if (stat & BIT_CBUS_MSC_MR_SET_INT)
sii8620_msc_mr_set_int(ctx);
@@ -1951,11 +1956,11 @@ static void sii8620_irq_ddc(struct sii8620 *ctx)
if (stat & BIT_DDC_CMD_DONE) {
sii8620_write(ctx, REG_INTR3_MASK, 0);
- if (sii8620_is_mhl3(ctx))
+ if (sii8620_is_mhl3(ctx) && !ctx->feature_complete)
sii8620_mt_set_int(ctx, MHL_INT_REG(RCHANGE),
MHL_INT_RC_FEAT_REQ);
else
- sii8620_edid_read(ctx, 0);
+ sii8620_enable_hpd(ctx);
}
sii8620_write(ctx, REG_INTR3, stat);
}
--
2.7.4
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