[PATCH RFC v2 2/8] drm/meson: meson_dw_hdmi: switch to drm_bridge_funcs

[Neil Armstrong]

Switch the dw-hdmi driver to drm_bridge_funcs, and implement the
atomic_get_input_bus_fmts/atomic_get_output_bus_fmts.

Signed-off-by: Neil Armstrong <narmstrong@xxxxxxxxxxxx>
---
 drivers/gpu/drm/meson/meson_dw_hdmi.c | 67 +++++++++++++++++++++------
 1 file changed, 54 insertions(+), 13 deletions(-)

diff --git a/drivers/gpu/drm/meson/meson_dw_hdmi.c b/drivers/gpu/drm/meson/meson_dw_hdmi.c
index f893ebd0b799..333583ef3ab9 100644
--- a/drivers/gpu/drm/meson/meson_dw_hdmi.c
+++ b/drivers/gpu/drm/meson/meson_dw_hdmi.c
@@ -368,7 +368,7 @@ static inline void meson_dw_hdmi_phy_reset(struct meson_dw_hdmi *dw_hdmi)
 }
 
 static void dw_hdmi_set_vclk(struct meson_dw_hdmi *dw_hdmi,
-			     struct drm_display_mode *mode)
+			     const struct drm_display_mode *mode)
 {
 	struct meson_drm *priv = dw_hdmi->priv;
 	int vic = drm_match_cea_mode(mode);
@@ -663,6 +663,10 @@ dw_hdmi_mode_valid(struct drm_connector *connector,
 
 /* Encoder */
 
+static const u32 meson_dw_hdmi_out_bus_fmts[] = {
+	MEDIA_BUS_FMT_YUV8_1X24,
+};
+
 static void meson_venc_hdmi_encoder_destroy(struct drm_encoder *encoder)
 {
 	drm_encoder_cleanup(encoder);
@@ -672,15 +676,50 @@ static const struct drm_encoder_funcs meson_venc_hdmi_encoder_funcs = {
 	.destroy        = meson_venc_hdmi_encoder_destroy,
 };
 
-static int meson_venc_hdmi_encoder_atomic_check(struct drm_encoder *encoder,
+static void
+meson_venc_hdmi_encoder_get_out_bus_fmts(struct drm_bridge *bridge,
+					 struct drm_bridge_state *bridge_state,
+					 struct drm_crtc_state *crtc_state,
+					 struct drm_connector_state *conn_state,
+					 unsigned int *num_output_fmts,
+					 u32 *output_fmts)
+{
+	*num_output_fmts = ARRAY_SIZE(meson_dw_hdmi_out_bus_fmts);
+
+	if (output_fmts)
+		memcpy(output_fmts, meson_dw_hdmi_out_bus_fmts,
+		       ARRAY_SIZE(meson_dw_hdmi_out_bus_fmts));
+}
+
+static void
+meson_venc_hdmi_encoder_get_inp_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)
+{
+	if (output_fmt == meson_dw_hdmi_out_bus_fmts[0]) {
+		*num_input_fmts = 1;
+		if (input_fmts)
+			input_fmts[0] = output_fmt;
+	}
+	else
+		*num_input_fmts = 0;
+}
+
+static int meson_venc_hdmi_encoder_atomic_check(struct drm_bridge *bridge,
+					struct drm_bridge_state *bridge_state,
 					struct drm_crtc_state *crtc_state,
 					struct drm_connector_state *conn_state)
 {
 	return 0;
 }
 
-static void meson_venc_hdmi_encoder_disable(struct drm_encoder *encoder)
+static void meson_venc_hdmi_encoder_disable(struct drm_bridge *bridge)
 {
+	struct drm_encoder *encoder = bridge_to_encoder(bridge);
 	struct meson_dw_hdmi *dw_hdmi = encoder_to_meson_dw_hdmi(encoder);
 	struct meson_drm *priv = dw_hdmi->priv;
 
@@ -693,8 +732,9 @@ static void meson_venc_hdmi_encoder_disable(struct drm_encoder *encoder)
 	writel_relaxed(0, priv->io_base + _REG(ENCP_VIDEO_EN));
 }
 
-static void meson_venc_hdmi_encoder_enable(struct drm_encoder *encoder)
+static void meson_venc_hdmi_encoder_enable(struct drm_bridge *bridge)
 {
+	struct drm_encoder *encoder = bridge_to_encoder(bridge);
 	struct meson_dw_hdmi *dw_hdmi = encoder_to_meson_dw_hdmi(encoder);
 	struct meson_drm *priv = dw_hdmi->priv;
 
@@ -706,10 +746,11 @@ static void meson_venc_hdmi_encoder_enable(struct drm_encoder *encoder)
 		writel_relaxed(1, priv->io_base + _REG(ENCP_VIDEO_EN));
 }
 
-static void meson_venc_hdmi_encoder_mode_set(struct drm_encoder *encoder,
-				   struct drm_display_mode *mode,
-				   struct drm_display_mode *adjusted_mode)
+static void meson_venc_hdmi_encoder_mode_set(struct drm_bridge *bridge,
+				   const struct drm_display_mode *mode,
+				   const struct drm_display_mode *adjusted_mode)
 {
+	struct drm_encoder *encoder = bridge_to_encoder(bridge);
 	struct meson_dw_hdmi *dw_hdmi = encoder_to_meson_dw_hdmi(encoder);
 	struct meson_drm *priv = dw_hdmi->priv;
 	int vic = drm_match_cea_mode(mode);
@@ -726,11 +767,12 @@ static void meson_venc_hdmi_encoder_mode_set(struct drm_encoder *encoder,
 	writel_relaxed(0, priv->io_base + _REG(VPU_HDMI_FMT_CTRL));
 }
 
-static const struct drm_encoder_helper_funcs
-				meson_venc_hdmi_encoder_helper_funcs = {
-	.atomic_check	= meson_venc_hdmi_encoder_atomic_check,
-	.disable	= meson_venc_hdmi_encoder_disable,
+static const struct drm_bridge_funcs meson_venc_hdmi_encoder_bridge_funcs = {
 	.enable		= meson_venc_hdmi_encoder_enable,
+	.disable	= meson_venc_hdmi_encoder_disable,
+	.atomic_check	= meson_venc_hdmi_encoder_atomic_check,
+	.atomic_get_output_bus_fmts = meson_venc_hdmi_encoder_get_out_bus_fmts,
+	.atomic_get_input_bus_fmts = meson_venc_hdmi_encoder_get_inp_bus_fmts,
 	.mode_set	= meson_venc_hdmi_encoder_mode_set,
 };
 
@@ -912,8 +954,7 @@ static int meson_dw_hdmi_bind(struct device *dev, struct device *master,
 
 	/* Encoder */
 
-	drm_encoder_helper_add(encoder, &meson_venc_hdmi_encoder_helper_funcs);
-
+	encoder->bridge.funcs = &meson_venc_hdmi_encoder_bridge_funcs;
 	ret = drm_encoder_init(drm, encoder, &meson_venc_hdmi_encoder_funcs,
 			       DRM_MODE_ENCODER_TMDS, "meson_hdmi");
 	if (ret) {
-- 
2.22.0