[PATCH 2/2] drm/vc4: hdmi: Remove drm_encoder->crtc usage

[Maxime Ripard]

The drm_encoder crtc pointer isn't really fit for an atomic driver,
let's rely on the connector state instead.

Signed-off-by: Maxime Ripard <maxime at cerno.tech>
---
 drivers/gpu/drm/vc4/vc4_hdmi.c | 50 ++++++++++++++++++++++++----------
 1 file changed, 36 insertions(+), 14 deletions(-)

diff --git a/drivers/gpu/drm/vc4/vc4_hdmi.c b/drivers/gpu/drm/vc4/vc4_hdmi.c
index 74f9df38815e..4bd01178ef9a 100644
--- a/drivers/gpu/drm/vc4/vc4_hdmi.c
+++ b/drivers/gpu/drm/vc4/vc4_hdmi.c
@@ -432,7 +432,7 @@ static void vc4_hdmi_set_avi_infoframe(struct drm_encoder *encoder)
 	struct vc4_hdmi_encoder *vc4_encoder = to_vc4_hdmi_encoder(encoder);
 	struct drm_connector *connector = &vc4_hdmi->connector;
 	struct drm_connector_state *cstate = connector->state;
-	struct drm_crtc *crtc = encoder->crtc;
+	struct drm_crtc *crtc = cstate->crtc;
 	const struct drm_display_mode *mode = &crtc->state->adjusted_mode;
 	union hdmi_infoframe frame;
 	int ret;
@@ -537,8 +537,11 @@ static bool vc4_hdmi_supports_scrambling(struct drm_encoder *encoder,
 
 static void vc4_hdmi_enable_scrambling(struct drm_encoder *encoder)
 {
-	struct drm_display_mode *mode = &encoder->crtc->state->adjusted_mode;
 	struct vc4_hdmi *vc4_hdmi = encoder_to_vc4_hdmi(encoder);
+	struct drm_connector *connector = &vc4_hdmi->connector;
+	struct drm_connector_state *cstate = connector->state;
+	struct drm_crtc *crtc = cstate->crtc;
+	struct drm_display_mode *mode = &crtc->state->adjusted_mode;
 
 	if (!vc4_hdmi_supports_scrambling(encoder, mode))
 		return;
@@ -559,17 +562,18 @@ static void vc4_hdmi_enable_scrambling(struct drm_encoder *encoder)
 static void vc4_hdmi_disable_scrambling(struct drm_encoder *encoder)
 {
 	struct vc4_hdmi *vc4_hdmi = encoder_to_vc4_hdmi(encoder);
-	struct drm_crtc *crtc = encoder->crtc;
+	struct drm_connector *connector = &vc4_hdmi->connector;
+	struct drm_connector_state *cstate = connector->state;
 
 	/*
-	 * At boot, encoder->crtc will be NULL. Since we don't know the
+	 * At boot, connector->state will be NULL. Since we don't know the
 	 * state of the scrambler and in order to avoid any
 	 * inconsistency, let's disable it all the time.
 	 */
-	if (crtc && !vc4_hdmi_supports_scrambling(encoder, &crtc->mode))
+	if (cstate && !vc4_hdmi_supports_scrambling(encoder, &cstate->crtc->mode))
 		return;
 
-	if (crtc && !vc4_hdmi_mode_needs_scrambling(&crtc->mode))
+	if (cstate && !vc4_hdmi_mode_needs_scrambling(&cstate->crtc->mode))
 		return;
 
 	if (delayed_work_pending(&vc4_hdmi->scrambling_work))
@@ -891,7 +895,9 @@ static void vc4_hdmi_encoder_pre_crtc_configure(struct drm_encoder *encoder,
 		vc4_hdmi_encoder_get_connector_state(encoder, state);
 	struct vc4_hdmi_connector_state *vc4_conn_state =
 		conn_state_to_vc4_hdmi_conn_state(conn_state);
-	struct drm_display_mode *mode = &encoder->crtc->state->adjusted_mode;
+	struct drm_crtc_state *crtc_state =
+		drm_atomic_get_new_crtc_state(state, conn_state->crtc);
+	struct drm_display_mode *mode = &crtc_state->adjusted_mode;
 	struct vc4_hdmi *vc4_hdmi = encoder_to_vc4_hdmi(encoder);
 	unsigned long bvb_rate, pixel_rate, hsm_rate;
 	int ret;
@@ -985,7 +991,11 @@ static void vc4_hdmi_encoder_pre_crtc_configure(struct drm_encoder *encoder,
 static void vc4_hdmi_encoder_pre_crtc_enable(struct drm_encoder *encoder,
 					     struct drm_atomic_state *state)
 {
-	struct drm_display_mode *mode = &encoder->crtc->state->adjusted_mode;
+	struct drm_connector_state *conn_state =
+		vc4_hdmi_encoder_get_connector_state(encoder, state);
+	struct drm_crtc_state *crtc_state =
+		drm_atomic_get_new_crtc_state(state, conn_state->crtc);
+	struct drm_display_mode *mode = &crtc_state->adjusted_mode;
 	struct vc4_hdmi_encoder *vc4_encoder = to_vc4_hdmi_encoder(encoder);
 	struct vc4_hdmi *vc4_hdmi = encoder_to_vc4_hdmi(encoder);
 
@@ -1008,7 +1018,11 @@ static void vc4_hdmi_encoder_pre_crtc_enable(struct drm_encoder *encoder,
 static void vc4_hdmi_encoder_post_crtc_enable(struct drm_encoder *encoder,
 					      struct drm_atomic_state *state)
 {
-	struct drm_display_mode *mode = &encoder->crtc->state->adjusted_mode;
+	struct drm_connector_state *conn_state =
+		vc4_hdmi_encoder_get_connector_state(encoder, state);
+	struct drm_crtc_state *crtc_state =
+		drm_atomic_get_new_crtc_state(state, conn_state->crtc);
+	struct drm_display_mode *mode = &crtc_state->adjusted_mode;
 	struct vc4_hdmi *vc4_hdmi = encoder_to_vc4_hdmi(encoder);
 	struct vc4_hdmi_encoder *vc4_encoder = to_vc4_hdmi_encoder(encoder);
 	bool hsync_pos = mode->flags & DRM_MODE_FLAG_PHSYNC;
@@ -1196,8 +1210,8 @@ static void vc4_hdmi_audio_set_mai_clock(struct vc4_hdmi *vc4_hdmi,
 
 static void vc4_hdmi_set_n_cts(struct vc4_hdmi *vc4_hdmi, unsigned int samplerate)
 {
-	struct drm_encoder *encoder = &vc4_hdmi->encoder.base.base;
-	struct drm_crtc *crtc = encoder->crtc;
+	struct drm_connector *connector = &vc4_hdmi->connector;
+	struct drm_crtc *crtc = connector->state->crtc;
 	const struct drm_display_mode *mode = &crtc->state->adjusted_mode;
 	u32 n, cts;
 	u64 tmp;
@@ -1229,12 +1243,20 @@ static inline struct vc4_hdmi *dai_to_hdmi(struct snd_soc_dai *dai)
 
 static bool vc4_hdmi_audio_can_stream(struct vc4_hdmi *vc4_hdmi)
 {
-	struct drm_encoder *encoder = &vc4_hdmi->encoder.base.base;
+	struct drm_connector *connector = &vc4_hdmi->connector;
 
 	/*
-	 * The encoder doesn't have a CRTC until the first modeset.
+	 * The HDMI connector doesn't have a state until
+	 * drm_mode_config_reset() is called.
 	 */
-	if (!encoder->crtc)
+	if (!connector->state)
+		return false;
+
+	/*
+	 * If the connector is disabled, its state won't have a pointer
+	 * to the CRTC.
+	 */
+	if (!connector->state->crtc)
 		return false;
 
 	/*
-- 
2.31.1