From: Hans Verkuil <hans.verkuil@xxxxxxxxx>
As long as there is a valid physical address in the EDID and the omap
CEC support is enabled, then we keep ls_oe_gpio on to ensure the CEC
signal is passed through the tpd12s015.
Signed-off-by: Hans Verkuil <hans.verkuil@xxxxxxxxx>
Suggested-by: Tomi Valkeinen <tomi.valkeinen@xxxxxx>
---
drivers/gpu/drm/omapdrm/displays/encoder-tpd12s015.c | 13 ++++++++++++-
1 file changed, 12 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/omapdrm/displays/encoder-tpd12s015.c b/drivers/gpu/drm/omapdrm/displays/encoder-tpd12s015.c
index 916a899..efbba23 100644
--- a/drivers/gpu/drm/omapdrm/displays/encoder-tpd12s015.c
+++ b/drivers/gpu/drm/omapdrm/displays/encoder-tpd12s015.c
@@ -16,6 +16,7 @@
#include <linux/platform_device.h>
#include <linux/gpio/consumer.h>
+#include <media/cec-edid.h>
#include <video/omapdss.h>
#include <video/omap-panel-data.h>
@@ -65,6 +66,7 @@ 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;
@@ -142,6 +144,7 @@ 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;
+ bool valid_phys_addr = 0;
int r;
if (!gpiod_get_value_cansleep(ddata->hpd_gpio))
@@ -151,7 +154,15 @@ static int tpd_read_edid(struct omap_dss_device *dssdev,
r = in->ops.hdmi->read_edid(in, edid, len);
- gpiod_set_value_cansleep(ddata->ls_oe_gpio, 0);
+#ifdef CONFIG_OMAP2_DSS_HDMI_CEC
+ /*
+ * In order to support CEC this pin should remain high
+ * as long as the EDID has a valid physical address.
+ */
+ valid_phys_addr =
+ cec_get_edid_phys_addr(edid, r, NULL) != CEC_PHYS_ADDR_INVALID;
+#endif
+ gpiod_set_value_cansleep(ddata->ls_oe_gpio, valid_phys_addr);
return r;
}
--
2.8.1
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