Add bridge timing information so that bridge users can figure out the
timing parameters that are necessary for TDA998x.
Signed-off-by: Russell King <rmk+kernel@xxxxxxxxxxxxxxx>
---
drivers/gpu/drm/i2c/tda998x_drv.c | 23 +++++++++++++++++++++++
1 file changed, 23 insertions(+)
diff --git a/drivers/gpu/drm/i2c/tda998x_drv.c b/drivers/gpu/drm/i2c/tda998x_drv.c
index a7bc3b7a9bcc..c399a7b73e2b 100644
--- a/drivers/gpu/drm/i2c/tda998x_drv.c
+++ b/drivers/gpu/drm/i2c/tda998x_drv.c
@@ -1572,6 +1572,18 @@ static const struct drm_bridge_funcs tda998x_bridge_funcs = {
.enable = tda998x_bridge_enable,
};
+static const struct drm_bridge_timings tda9989_timings = {
+ .sampling_edge = DRM_BUS_FLAG_PIXDATA_POSEDGE,
+ .setup_time_ps = 1500,
+ .hold_time_ps = 1000,
+};
+
+static const struct drm_bridge_timings tda19988_timings = {
+ .sampling_edge = DRM_BUS_FLAG_PIXDATA_POSEDGE,
+ .setup_time_ps = 1600,
+ .hold_time_ps = 1200,
+};
+
/* I2C driver functions */
static int tda998x_get_audio_ports(struct tda998x_priv *priv,
@@ -1842,6 +1854,17 @@ static int tda998x_create(struct device *dev)
priv->bridge.of_node = dev->of_node;
#endif
+ switch (priv->rev) {
+ case TDA9989N2:
+ case TDA19989:
+ case TDA19989N2:
+ priv->bridge.timings = &tda9989_timings;
+ break;
+ case TDA19988:
+ priv->bridge.timings = &tda19988_timings;
+ break;
+ }
+
drm_bridge_add(&priv->bridge);
return 0;
--
2.7.4
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