[Intel-gfx] [PATCH] drm/i915: make encoder enable and disable hooks optional

[Jani Nikula]

Encoders are not alike, make enable and disable hooks optional like
other hooks. Utilize this in DSI code, and remove the silly nop hook.

v2: Add the check also to intel_sanitize_encoder() (Madhav)

Reviewed-by: Madhav Chauhan <madhav.chau...@intel.com>
Signed-off-by: Jani Nikula <jani.nik...@intel.com>
---
 drivers/gpu/drm/i915/intel_display.c |  9 ++++++---
 drivers/gpu/drm/i915/vlv_dsi.c       | 16 ++++------------
 2 files changed, 10 insertions(+), 15 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_display.c 
b/drivers/gpu/drm/i915/intel_display.c
index 41abd03ce6a6..de6b4e734292 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -5461,7 +5461,8 @@ static void intel_encoders_enable(struct drm_crtc *crtc,
                if (conn_state->crtc != crtc)
                        continue;
 
-               encoder->enable(encoder, crtc_state, conn_state);
+               if (encoder->enable)
+                       encoder->enable(encoder, crtc_state, conn_state);
                intel_opregion_notify_encoder(encoder, true);
        }
 }
@@ -5482,7 +5483,8 @@ static void intel_encoders_disable(struct drm_crtc *crtc,
                        continue;
 
                intel_opregion_notify_encoder(encoder, false);
-               encoder->disable(encoder, old_crtc_state, old_conn_state);
+               if (encoder->disable)
+                       encoder->disable(encoder, old_crtc_state, 
old_conn_state);
        }
 }
 
@@ -15442,7 +15444,8 @@ static void intel_sanitize_encoder(struct intel_encoder 
*encoder)
                        DRM_DEBUG_KMS("[ENCODER:%d:%s] manually disabled\n",
                                      encoder->base.base.id,
                                      encoder->base.name);
-                       encoder->disable(encoder, 
to_intel_crtc_state(crtc_state), connector->base.state);
+                       if (encoder->disable)
+                               encoder->disable(encoder, 
to_intel_crtc_state(crtc_state), connector->base.state);
                        if (encoder->post_disable)
                                encoder->post_disable(encoder, 
to_intel_crtc_state(crtc_state), connector->base.state);
                }
diff --git a/drivers/gpu/drm/i915/vlv_dsi.c b/drivers/gpu/drm/i915/vlv_dsi.c
index bafeb2a19b90..dbca30460a6b 100644
--- a/drivers/gpu/drm/i915/vlv_dsi.c
+++ b/drivers/gpu/drm/i915/vlv_dsi.c
@@ -794,6 +794,10 @@ static void intel_dsi_msleep(struct intel_dsi *intel_dsi, 
int msec)
  * - wait t4                                           - wait t4
  */
 
+/*
+ * DSI port enable has to be done before pipe and plane enable, so we do it in
+ * the pre_enable hook instead of the enable hook.
+ */
 static void intel_dsi_pre_enable(struct intel_encoder *encoder,
                                 const struct intel_crtc_state *pipe_config,
                                 const struct drm_connector_state *conn_state)
@@ -896,17 +900,6 @@ static void intel_dsi_pre_enable(struct intel_encoder 
*encoder,
 }
 
 /*
- * DSI port enable has to be done before pipe and plane enable, so we do it in
- * the pre_enable hook.
- */
-static void intel_dsi_enable_nop(struct intel_encoder *encoder,
-                                const struct intel_crtc_state *pipe_config,
-                                const struct drm_connector_state *conn_state)
-{
-       DRM_DEBUG_KMS("\n");
-}
-
-/*
  * DSI port disable has to be done after pipe and plane disable, so we do it in
  * the post_disable hook.
  */
@@ -1764,7 +1757,6 @@ void vlv_dsi_init(struct drm_i915_private *dev_priv)
 
        intel_encoder->compute_config = intel_dsi_compute_config;
        intel_encoder->pre_enable = intel_dsi_pre_enable;
-       intel_encoder->enable = intel_dsi_enable_nop;
        intel_encoder->disable = intel_dsi_disable;
        intel_encoder->post_disable = intel_dsi_post_disable;
        intel_encoder->get_hw_state = intel_dsi_get_hw_state;
-- 
2.11.0

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