drm/i915: Constify states passed to enable/disable/etc. encoder hooks

The enable/disable/etc. encoder hooks aren't supposed to alter the
state(s), so pass them as const. Unfortunately C lacks any kind of deep
const thingy, so this can't catch all abuses. But at least it acts as a
hint to the reader telling them not to mess about with the state(s).

v2: Update intel_tv_mode_find() and ironlake_edp_pll_on() as well
v3: Deal with intel_sdvo_connector_state

Acked-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20170818134958.15502-9-ville.syrjala@linux.intel.com

1 files changed, 35 insertions, 35 deletions

diff --git a/drivers/gpu/drm/i915/intel_hdmi.c b/drivers/gpu/drm/i915/intel_hdmi.c
index 65083876294d..e6f8f30ce7bd 100644
--- a/drivers/gpu/drm/i915/intel_hdmi.c
+++ b/drivers/gpu/drm/i915/intel_hdmi.c
@@ -992,8 +992,8 @@ static void intel_hdmi_get_config(struct intel_encoder *encoder,
 }
 
 static void intel_enable_hdmi_audio(struct intel_encoder *encoder,
-				    struct intel_crtc_state *pipe_config,
-				    struct drm_connector_state *conn_state)
+				    const struct intel_crtc_state *pipe_config,
+				    const struct drm_connector_state *conn_state)
 {
 	struct intel_crtc *crtc = to_intel_crtc(pipe_config->base.crtc);
 
@@ -1004,8 +1004,8 @@ static void intel_enable_hdmi_audio(struct intel_encoder *encoder,
 }
 
 static void g4x_enable_hdmi(struct intel_encoder *encoder,
-			    struct intel_crtc_state *pipe_config,
-			    struct drm_connector_state *conn_state)
+			    const struct intel_crtc_state *pipe_config,
+			    const struct drm_connector_state *conn_state)
 {
 	struct drm_device *dev = encoder->base.dev;
 	struct drm_i915_private *dev_priv = to_i915(dev);
@@ -1026,8 +1026,8 @@ static void g4x_enable_hdmi(struct intel_encoder *encoder,
 }
 
 static void ibx_enable_hdmi(struct intel_encoder *encoder,
-			    struct intel_crtc_state *pipe_config,
-			    struct drm_connector_state *conn_state)
+			    const struct intel_crtc_state *pipe_config,
+			    const struct drm_connector_state *conn_state)
 {
 	struct drm_device *dev = encoder->base.dev;
 	struct drm_i915_private *dev_priv = to_i915(dev);
@@ -1076,8 +1076,8 @@ static void ibx_enable_hdmi(struct intel_encoder *encoder,
 }
 
 static void cpt_enable_hdmi(struct intel_encoder *encoder,
-			    struct intel_crtc_state *pipe_config,
-			    struct drm_connector_state *conn_state)
+			    const struct intel_crtc_state *pipe_config,
+			    const struct drm_connector_state *conn_state)
 {
 	struct drm_device *dev = encoder->base.dev;
 	struct drm_i915_private *dev_priv = to_i915(dev);
@@ -1131,14 +1131,14 @@ static void cpt_enable_hdmi(struct intel_encoder *encoder,
 }
 
 static void vlv_enable_hdmi(struct intel_encoder *encoder,
-			    struct intel_crtc_state *pipe_config,
-			    struct drm_connector_state *conn_state)
+			    const struct intel_crtc_state *pipe_config,
+			    const struct drm_connector_state *conn_state)
 {
 }
 
 static void intel_disable_hdmi(struct intel_encoder *encoder,
-			       struct intel_crtc_state *old_crtc_state,
-			       struct drm_connector_state *old_conn_state)
+			       const struct intel_crtc_state *old_crtc_state,
+			       const struct drm_connector_state *old_conn_state)
 {
 	struct drm_device *dev = encoder->base.dev;
 	struct drm_i915_private *dev_priv = to_i915(dev);
@@ -1194,8 +1194,8 @@ static void intel_disable_hdmi(struct intel_encoder *encoder,
 }
 
 static void g4x_disable_hdmi(struct intel_encoder *encoder,
-			     struct intel_crtc_state *old_crtc_state,
-			     struct drm_connector_state *old_conn_state)
+			     const struct intel_crtc_state *old_crtc_state,
+			     const struct drm_connector_state *old_conn_state)
 {
 	if (old_crtc_state->has_audio)
 		intel_audio_codec_disable(encoder);
@@ -1204,16 +1204,16 @@ static void g4x_disable_hdmi(struct intel_encoder *encoder,
 }
 
 static void pch_disable_hdmi(struct intel_encoder *encoder,
-			     struct intel_crtc_state *old_crtc_state,
-			     struct drm_connector_state *old_conn_state)
+			     const struct intel_crtc_state *old_crtc_state,
+			     const struct drm_connector_state *old_conn_state)
 {
 	if (old_crtc_state->has_audio)
 		intel_audio_codec_disable(encoder);
 }
 
 static void pch_post_disable_hdmi(struct intel_encoder *encoder,
-				  struct intel_crtc_state *old_crtc_state,
-				  struct drm_connector_state *old_conn_state)
+				  const struct intel_crtc_state *old_crtc_state,
+				  const struct drm_connector_state *old_conn_state)
 {
 	intel_disable_hdmi(encoder, old_crtc_state, old_conn_state);
 }
@@ -1318,7 +1318,7 @@ intel_hdmi_mode_valid(struct drm_connector *connector,
 	return status;
 }
 
-static bool hdmi_12bpc_possible(struct intel_crtc_state *crtc_state)
+static bool hdmi_12bpc_possible(const struct intel_crtc_state *crtc_state)
 {
 	struct drm_i915_private *dev_priv =
 		to_i915(crtc_state->base.crtc->dev);
@@ -1646,8 +1646,8 @@ static int intel_hdmi_get_modes(struct drm_connector *connector)
 }
 
 static void intel_hdmi_pre_enable(struct intel_encoder *encoder,
-				  struct intel_crtc_state *pipe_config,
-				  struct drm_connector_state *conn_state)
+				  const struct intel_crtc_state *pipe_config,
+				  const struct drm_connector_state *conn_state)
 {
 	struct intel_digital_port *intel_dig_port =
 		enc_to_dig_port(&encoder->base);
@@ -1660,8 +1660,8 @@ static void intel_hdmi_pre_enable(struct intel_encoder *encoder,
 }
 
 static void vlv_hdmi_pre_enable(struct intel_encoder *encoder,
-				struct intel_crtc_state *pipe_config,
-				struct drm_connector_state *conn_state)
+				const struct intel_crtc_state *pipe_config,
+				const struct drm_connector_state *conn_state)
 {
 	struct intel_digital_port *dport = enc_to_dig_port(&encoder->base);
 	struct drm_device *dev = encoder->base.dev;
@@ -1683,8 +1683,8 @@ static void vlv_hdmi_pre_enable(struct intel_encoder *encoder,
 }
 
 static void vlv_hdmi_pre_pll_enable(struct intel_encoder *encoder,
-				    struct intel_crtc_state *pipe_config,
-				    struct drm_connector_state *conn_state)
+				    const struct intel_crtc_state *pipe_config,
+				    const struct drm_connector_state *conn_state)
 {
 	intel_hdmi_prepare(encoder, pipe_config);
 
@@ -1692,8 +1692,8 @@ static void vlv_hdmi_pre_pll_enable(struct intel_encoder *encoder,
 }
 
 static void chv_hdmi_pre_pll_enable(struct intel_encoder *encoder,
-				    struct intel_crtc_state *pipe_config,
-				    struct drm_connector_state *conn_state)
+				    const struct intel_crtc_state *pipe_config,
+				    const struct drm_connector_state *conn_state)
 {
 	intel_hdmi_prepare(encoder, pipe_config);
 
@@ -1701,23 +1701,23 @@ static void chv_hdmi_pre_pll_enable(struct intel_encoder *encoder,
 }
 
 static void chv_hdmi_post_pll_disable(struct intel_encoder *encoder,
-				      struct intel_crtc_state *old_crtc_state,
-				      struct drm_connector_state *old_conn_state)
+				      const struct intel_crtc_state *old_crtc_state,
+				      const struct drm_connector_state *old_conn_state)
 {
 	chv_phy_post_pll_disable(encoder);
 }
 
 static void vlv_hdmi_post_disable(struct intel_encoder *encoder,
-				  struct intel_crtc_state *old_crtc_state,
-				  struct drm_connector_state *old_conn_state)
+				  const struct intel_crtc_state *old_crtc_state,
+				  const struct drm_connector_state *old_conn_state)
 {
 	/* Reset lanes to avoid HDMI flicker (VLV w/a) */
 	vlv_phy_reset_lanes(encoder);
 }
 
 static void chv_hdmi_post_disable(struct intel_encoder *encoder,
-				  struct intel_crtc_state *old_crtc_state,
-				  struct drm_connector_state *old_conn_state)
+				  const struct intel_crtc_state *old_crtc_state,
+				  const struct drm_connector_state *old_conn_state)
 {
 	struct drm_device *dev = encoder->base.dev;
 	struct drm_i915_private *dev_priv = to_i915(dev);
@@ -1731,8 +1731,8 @@ static void chv_hdmi_post_disable(struct intel_encoder *encoder,
 }
 
 static void chv_hdmi_pre_enable(struct intel_encoder *encoder,
-				struct intel_crtc_state *pipe_config,
-				struct drm_connector_state *conn_state)
+				const struct intel_crtc_state *pipe_config,
+				const struct drm_connector_state *conn_state)
 {
 	struct intel_digital_port *dport = enc_to_dig_port(&encoder->base);
 	struct drm_device *dev = encoder->base.dev;