[RFC 03/11] drm/meson: meson_dw_hdmi: switch to drm_bridge_funcs

[Neil Armstrong]

Switch the dw-hdmi driver to drm_bridge_funcs, and add the default supported
YUV444 bus format to the encoder output_bus_caps.

Signed-off-by: Neil Armstrong <narmstrong at baylibre.com>
---
 drivers/gpu/drm/meson/meson_dw_hdmi.c | 37 +++++++++++++++++----------
 1 file changed, 24 insertions(+), 13 deletions(-)

diff --git a/drivers/gpu/drm/meson/meson_dw_hdmi.c b/drivers/gpu/drm/meson/meson_dw_hdmi.c
index 9f0b08eaf003..9a99d3920610 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);
@@ -670,15 +670,17 @@ 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 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;
 
@@ -691,8 +693,9 @@ 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;
 
@@ -704,10 +707,11 @@ 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);
@@ -724,11 +728,10 @@ 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,
 	.mode_set	= meson_venc_hdmi_encoder_mode_set,
 };
 
@@ -800,6 +803,10 @@ static bool meson_hdmi_connector_is_available(struct device *dev)
 	return false;
 }
 
+static const u32 meson_dw_hdmi_out_bus_fmts[] = {
+	MEDIA_BUS_FMT_YUV8_1X24,
+};
+
 static int meson_dw_hdmi_bind(struct device *dev, struct device *master,
 				void *data)
 {
@@ -810,6 +817,7 @@ static int meson_dw_hdmi_bind(struct device *dev, struct device *master,
 	struct meson_drm *priv = drm->dev_private;
 	struct dw_hdmi_plat_data *dw_plat_data;
 	struct drm_encoder *encoder;
+	struct drm_bus_caps *bus_caps;
 	struct resource *res;
 	int irq;
 	int ret;
@@ -837,6 +845,7 @@ static int meson_dw_hdmi_bind(struct device *dev, struct device *master,
 	meson_dw_hdmi->data = match;
 	dw_plat_data = &meson_dw_hdmi->dw_plat_data;
 	encoder = &meson_dw_hdmi->encoder;
+	bus_caps = &encoder->bridge.output_bus_caps;
 
 	meson_dw_hdmi->hdmi_supply = devm_regulator_get_optional(dev, "hdmi");
 	if (IS_ERR(meson_dw_hdmi->hdmi_supply)) {
@@ -910,8 +919,7 @@ 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) {
@@ -919,6 +927,9 @@ static int meson_dw_hdmi_bind(struct device *dev, struct device *master,
 		return ret;
 	}
 
+	bus_caps->supported_fmts = meson_dw_hdmi_out_bus_fmts;
+	bus_caps->num_supported_fmts = ARRAY_SIZE(meson_dw_hdmi_out_bus_fmts);
+
 	encoder->possible_crtcs = BIT(0);
 
 	DRM_DEBUG_DRIVER("encoder initialized\n");
-- 
2.22.0