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omapdrm: encoder-tpd12s015: keep ls_oe_gpio high

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For OMAP4 CEC support the CEC pin should always be on. So keep
ls_oe_gpio high all the time in order to support CEC.

Background: even if the HPD is low it should still be possible
to use CEC. Some displays will set the HPD low when they go into standby or
when they switch to another input, but CEC is still available and able
to wake up/change input for such a display.

This is explicitly allowed by the CEC standard.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
This commit is contained in:
Hans Verkuil 2017-08-02 10:54:00 +02:00 committed by Tomi Valkeinen
parent 9e66317d3c
commit 3b86b9ec21
1 changed files with 4 additions and 8 deletions
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12
drivers/gpu/drm/omapdrm/displays/encoder-tpd12s015.c
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@ -51,6 +51,8 @@ static int tpd_connect(struct omap_dss_device *dssdev,
dssdev->dst = dst;
gpiod_set_value_cansleep(ddata->ct_cp_hpd_gpio, 1);
gpiod_set_value_cansleep(ddata->ls_oe_gpio, 1);
/* DC-DC converter needs at max 300us to get to 90% of 5V */
udelay(300);
@ -69,6 +71,7 @@ static void tpd_disconnect(struct omap_dss_device *dssdev,
return;
gpiod_set_value_cansleep(ddata->ct_cp_hpd_gpio, 0);
gpiod_set_value_cansleep(ddata->ls_oe_gpio, 0);
dst->src = NULL;
dssdev->dst = NULL;
@ -146,18 +149,11 @@ static int tpd_read_edid(struct omap_dss_device *dssdev,
{
struct panel_drv_data *ddata = to_panel_data(dssdev);
struct omap_dss_device *in = ddata->in;
int r;
if (!gpiod_get_value_cansleep(ddata->hpd_gpio))
return -ENODEV;
gpiod_set_value_cansleep(ddata->ls_oe_gpio, 1);
r = in->ops.hdmi->read_edid(in, edid, len);
gpiod_set_value_cansleep(ddata->ls_oe_gpio, 0);
return r;
return in->ops.hdmi->read_edid(in, edid, len);
}
static bool tpd_detect(struct omap_dss_device *dssdev)