Implement the .atomic_get_input_bus_fmts callback to let the bridge
indicate the pixel format it requires on the parallel bus to the LCDIF.
Based on Marek's commit db8b7ca5b232 ("drm/bridge: ti-sn65dsi83: Replace
connector format patching with atomic_get_input_bus_fmts").
Tested on a imx6sx-udoo-neo board.
Suggested-by: Marek Vasut <marex@xxxxxxx>
Signed-off-by: Fabio Estevam <festevam@xxxxxxxxx>
---
drivers/gpu/drm/i2c/tda998x_drv.c | 29 +++++++++++++++++++++++++++++
1 file changed, 29 insertions(+)
diff --git a/drivers/gpu/drm/i2c/tda998x_drv.c b/drivers/gpu/drm/i2c/tda998x_drv.c
index adaa985af87e..d987481e97c1 100644
--- a/drivers/gpu/drm/i2c/tda998x_drv.c
+++ b/drivers/gpu/drm/i2c/tda998x_drv.c
@@ -1678,6 +1678,31 @@ static void tda998x_bridge_mode_set(struct drm_bridge *bridge,
mutex_unlock(&priv->audio_mutex);
}
+#define MAX_INPUT_SEL_FORMATS 1
+
+static u32 *
+tda998x_atomic_get_input_bus_fmts(struct drm_bridge *bridge,
+ struct drm_bridge_state *bridge_state,
+ struct drm_crtc_state *crtc_state,
+ struct drm_connector_state *conn_state,
+ u32 output_fmt,
+ unsigned int *num_input_fmts)
+{
+ u32 *input_fmts;
+
+ *num_input_fmts = 0;
+
+ input_fmts = kcalloc(MAX_INPUT_SEL_FORMATS, sizeof(*input_fmts),
+ GFP_KERNEL);
+ if (!input_fmts)
+ return NULL;
+
+ input_fmts[0] = MEDIA_BUS_FMT_RGB888_1X24;
+ *num_input_fmts = 1;
+
+ return input_fmts;
+}
+
static const struct drm_bridge_funcs tda998x_bridge_funcs = {
.attach = tda998x_bridge_attach,
.detach = tda998x_bridge_detach,
@@ -1685,6 +1710,10 @@ static const struct drm_bridge_funcs tda998x_bridge_funcs = {
.atomic_disable = tda998x_bridge_atomic_disable,
.mode_set = tda998x_bridge_mode_set,
.atomic_enable = tda998x_bridge_atomic_enable,
+ .atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state,
+ .atomic_destroy_state = drm_atomic_helper_bridge_destroy_state,
+ .atomic_reset = drm_atomic_helper_bridge_reset,
+ .atomic_get_input_bus_fmts = tda998x_atomic_get_input_bus_fmts,
};
/* I2C driver functions */
--
2.25.1
