drm/i915: add pipe_config->has_pch_encoder

This is used way too often in the enable/disable paths. And will
be even more useful in the future.

Note that correct semantics of this change highly depend upon
correct updating of intel_crtc->config: Like with all other
modeset state, we need to call ->disable with the old config,
but ->mode_set and ->enable with the new config.

v2: Do not yet use the flag in the ->disable callbacks - atm we don't
yet have support for the information stored in the pipe_config in the
hw state readout code, so this will be wrong at boot-up/resume.

v3: Rebased on top of the hdmi/dp ddi encoder merging.

v4: Fixup stupid rebase error which lead to a NULL vfunc deref.

v5: On haswell the VGA port is on the PCH!

v6: s/IS_HASWELL/HAS_DDI/, spotted by Paulo Zanoni. Also add a missing
parameter name in a function declaration.

v7: Don't forget to git add ...

Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

8 files changed, 54 insertions, 62 deletions

diff --git a/drivers/gpu/drm/i915/intel_crt.c b/drivers/gpu/drm/i915/intel_crt.c
index 756ae552e7e5..1ae2d7f39c6f 100644
--- a/drivers/gpu/drm/i915/intel_crt.c
+++ b/drivers/gpu/drm/i915/intel_crt.c
@@ -206,10 +206,14 @@ static int intel_crt_mode_valid(struct drm_connector *connector,
         return MODE_OK;
 }
 
-static bool intel_crt_mode_fixup(struct drm_encoder *encoder,
-                                 const struct drm_display_mode *mode,
-                                 struct drm_display_mode *adjusted_mode)
+static bool intel_crt_compute_config(struct intel_encoder *encoder,
+                                     struct intel_crtc_config *pipe_config)
 {
+        struct drm_device *dev = encoder->base.dev;
+
+        if (HAS_PCH_SPLIT(dev))
+                pipe_config->has_pch_encoder = true;
+
         return true;
 }
 
@@ -683,7 +687,6 @@ static void intel_crt_reset(struct drm_connector *connector)
  */
 
 static const struct drm_encoder_helper_funcs crt_encoder_funcs = {
-        .mode_fixup = intel_crt_mode_fixup,
         .mode_set = intel_crt_mode_set,
 };
 
@@ -774,6 +777,7 @@ void intel_crt_init(struct drm_device *dev)
         else
                 crt->adpa_reg = ADPA;
 
+        crt->base.compute_config = intel_crt_compute_config;
         crt->base.disable = intel_disable_crt;
         crt->base.enable = intel_enable_crt;
         if (I915_HAS_HOTPLUG(dev))
diff --git a/drivers/gpu/drm/i915/intel_ddi.c b/drivers/gpu/drm/i915/intel_ddi.c
index 258e38e08b6e..baeb4700e5e6 100644
--- a/drivers/gpu/drm/i915/intel_ddi.c
+++ b/drivers/gpu/drm/i915/intel_ddi.c
@@ -1476,19 +1476,17 @@ static void intel_ddi_destroy(struct drm_encoder *encoder)
         intel_dp_encoder_destroy(encoder);
 }
 
-static bool intel_ddi_mode_fixup(struct drm_encoder *encoder,
-                                 const struct drm_display_mode *mode,
-                                 struct drm_display_mode *adjusted_mode)
+static bool intel_ddi_compute_config(struct intel_encoder *encoder,
+                                     struct intel_crtc_config *pipe_config)
 {
-        struct intel_encoder *intel_encoder = to_intel_encoder(encoder);
-        int type = intel_encoder->type;
+        int type = encoder->type;
 
-        WARN(type == INTEL_OUTPUT_UNKNOWN, "mode_fixup() on unknown output!\n");
+        WARN(type == INTEL_OUTPUT_UNKNOWN, "compute_config() on unknown output!\n");
 
         if (type == INTEL_OUTPUT_HDMI)
-                return intel_hdmi_mode_fixup(encoder, mode, adjusted_mode);
+                return intel_hdmi_compute_config(encoder, pipe_config);
         else
-                return intel_dp_mode_fixup(encoder, mode, adjusted_mode);
+                return intel_dp_compute_config(encoder, pipe_config);
 }
 
 static const struct drm_encoder_funcs intel_ddi_funcs = {
@@ -1496,7 +1494,6 @@ static const struct drm_encoder_funcs intel_ddi_funcs = {
 };
 
 static const struct drm_encoder_helper_funcs intel_ddi_helper_funcs = {
-        .mode_fixup = intel_ddi_mode_fixup,
         .mode_set = intel_ddi_mode_set,
 };
 
@@ -1536,6 +1533,7 @@ void intel_ddi_init(struct drm_device *dev, enum port port)
                          DRM_MODE_ENCODER_TMDS);
         drm_encoder_helper_add(encoder, &intel_ddi_helper_funcs);
 
+        intel_encoder->compute_config = intel_ddi_compute_config;
         intel_encoder->enable = intel_enable_ddi;
         intel_encoder->pre_enable = intel_ddi_pre_enable;
         intel_encoder->disable = intel_disable_ddi;
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 7335ec2733de..14e7e919ca51 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -2977,27 +2977,6 @@ static void intel_crtc_wait_for_pending_flips(struct drm_crtc *crtc)
         mutex_unlock(&dev->struct_mutex);
 }
 
-static bool ironlake_crtc_driving_pch(struct drm_crtc *crtc)
-{
-        struct drm_device *dev = crtc->dev;
-        struct intel_encoder *intel_encoder;
-
-        /*
-         * If there's a non-PCH eDP on this crtc, it must be DP_A, and that
-         * must be driven by its own crtc; no sharing is possible.
-         */
-        for_each_encoder_on_crtc(dev, crtc, intel_encoder) {
-                switch (intel_encoder->type) {
-                case INTEL_OUTPUT_EDP:
-                        if (!intel_encoder_is_pch_edp(&intel_encoder->base))
-                                return false;
-                        continue;
-                }
-        }
-
-        return true;
-}
-
 static bool haswell_crtc_driving_pch(struct drm_crtc *crtc)
 {
         return intel_pipe_has_type(crtc, INTEL_OUTPUT_ANALOG);
@@ -3338,7 +3317,6 @@ static void ironlake_crtc_enable(struct drm_crtc *crtc)
         int pipe = intel_crtc->pipe;
         int plane = intel_crtc->plane;
         u32 temp;
-        bool is_pch_port;
 
         WARN_ON(!crtc->enabled);
 
@@ -3354,9 +3332,8 @@ static void ironlake_crtc_enable(struct drm_crtc *crtc)
                         I915_WRITE(PCH_LVDS, temp | LVDS_PORT_EN);
         }
 
-        is_pch_port = ironlake_crtc_driving_pch(crtc);
 
-        if (is_pch_port) {
+        if (intel_crtc->config.has_pch_encoder) {
                 /* Note: FDI PLL enabling _must_ be done before we enable the
                  * cpu pipes, hence this is separate from all the other fdi/pch
                  * enabling. */
@@ -3393,10 +3370,11 @@ static void ironlake_crtc_enable(struct drm_crtc *crtc)
          */
         intel_crtc_load_lut(crtc);
 
-        intel_enable_pipe(dev_priv, pipe, is_pch_port);
+        intel_enable_pipe(dev_priv, pipe,
+                          intel_crtc->config.has_pch_encoder);
         intel_enable_plane(dev_priv, plane, pipe);
 
-        if (is_pch_port)
+        if (intel_crtc->config.has_pch_encoder)
                 ironlake_pch_enable(crtc);
 
         mutex_lock(&dev->struct_mutex);
@@ -3430,7 +3408,6 @@ static void haswell_crtc_enable(struct drm_crtc *crtc)
         struct intel_encoder *encoder;
         int pipe = intel_crtc->pipe;
         int plane = intel_crtc->plane;
-        bool is_pch_port;
 
         WARN_ON(!crtc->enabled);
 
@@ -3440,9 +3417,7 @@ static void haswell_crtc_enable(struct drm_crtc *crtc)
         intel_crtc->active = true;
         intel_update_watermarks(dev);
 
-        is_pch_port = haswell_crtc_driving_pch(crtc);
-
-        if (is_pch_port)
+        if (intel_crtc->config.has_pch_encoder)
                 dev_priv->display.fdi_link_train(crtc);
 
         for_each_encoder_on_crtc(dev, crtc, encoder)
@@ -3473,10 +3448,11 @@ static void haswell_crtc_enable(struct drm_crtc *crtc)
         intel_ddi_set_pipe_settings(crtc);
         intel_ddi_enable_transcoder_func(crtc);
 
-        intel_enable_pipe(dev_priv, pipe, is_pch_port);
+        intel_enable_pipe(dev_priv, pipe,
+                          intel_crtc->config.has_pch_encoder);
         intel_enable_plane(dev_priv, plane, pipe);
 
-        if (is_pch_port)
+        if (intel_crtc->config.has_pch_encoder)
                 lpt_pch_enable(crtc);
 
         mutex_lock(&dev->struct_mutex);
diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index ad6bba3ba06a..65550e467464 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -689,12 +689,13 @@ intel_dp_i2c_init(struct intel_dp *intel_dp,
 }
 
 bool
-intel_dp_mode_fixup(struct drm_encoder *encoder,
-                    const struct drm_display_mode *mode,
-                    struct drm_display_mode *adjusted_mode)
+intel_dp_compute_config(struct intel_encoder *encoder,
+                        struct intel_crtc_config *pipe_config)
 {
-        struct drm_device *dev = encoder->dev;
-        struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
+        struct drm_device *dev = encoder->base.dev;
+        struct drm_display_mode *adjusted_mode = &pipe_config->adjusted_mode;
+        struct drm_display_mode *mode = &pipe_config->requested_mode;
+        struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base);
         struct intel_connector *intel_connector = intel_dp->attached_connector;
         int lane_count, clock;
         int max_lane_count = drm_dp_max_lane_count(intel_dp->dpcd);
@@ -702,6 +703,9 @@ intel_dp_mode_fixup(struct drm_encoder *encoder,
         int bpp, mode_rate;
         static int bws[2] = { DP_LINK_BW_1_62, DP_LINK_BW_2_7 };
 
+        if (HAS_PCH_SPLIT(dev) && !HAS_DDI(dev) && !is_cpu_edp(intel_dp))
+                pipe_config->has_pch_encoder = true;
+
         if (is_edp(intel_dp) && intel_connector->panel.fixed_mode) {
                 intel_fixed_panel_mode(intel_connector->panel.fixed_mode,
                                        adjusted_mode);
@@ -2527,7 +2531,6 @@ void intel_dp_encoder_destroy(struct drm_encoder *encoder)
 }
 
 static const struct drm_encoder_helper_funcs intel_dp_helper_funcs = {
-        .mode_fixup = intel_dp_mode_fixup,
         .mode_set = intel_dp_mode_set,
 };
 
@@ -2947,6 +2950,7 @@ intel_dp_init(struct drm_device *dev, int output_reg, enum port port)
                          DRM_MODE_ENCODER_TMDS);
         drm_encoder_helper_add(&intel_encoder->base, &intel_dp_helper_funcs);
 
+        intel_encoder->compute_config = intel_dp_compute_config;
         intel_encoder->enable = intel_enable_dp;
         intel_encoder->pre_enable = intel_pre_enable_dp;
         intel_encoder->disable = intel_disable_dp;
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index f0e5462c665b..8de1855f5872 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -190,6 +190,9 @@ struct intel_crtc_config {
          * changes the crtc timings in the mode to prevent the crtc fixup from
          * overwriting them.  Currently only lvds needs that. */
         bool timings_set;
+        /* Whether to set up the PCH/FDI. Note that we never allow sharing
+         * between pch encoders and cpu encoders. */
+        bool has_pch_encoder;
         /* Used by SDVO (and if we ever fix it, HDMI). */
         unsigned pixel_multiplier;
 };
@@ -449,9 +452,8 @@ extern void intel_hdmi_init(struct drm_device *dev,
 extern void intel_hdmi_init_connector(struct intel_digital_port *intel_dig_port,
                                       struct intel_connector *intel_connector);
 extern struct intel_hdmi *enc_to_intel_hdmi(struct drm_encoder *encoder);
-extern bool intel_hdmi_mode_fixup(struct drm_encoder *encoder,
-                                  const struct drm_display_mode *mode,
-                                  struct drm_display_mode *adjusted_mode);
+extern bool intel_hdmi_compute_config(struct intel_encoder *encoder,
+                                      struct intel_crtc_config *pipe_config);
 extern void intel_dip_infoframe_csum(struct dip_infoframe *avi_if);
 extern bool intel_sdvo_init(struct drm_device *dev, uint32_t sdvo_reg,
                             bool is_sdvob);
@@ -475,9 +477,8 @@ extern void intel_dp_complete_link_train(struct intel_dp *intel_dp);
 extern void intel_dp_sink_dpms(struct intel_dp *intel_dp, int mode);
 extern void intel_dp_encoder_destroy(struct drm_encoder *encoder);
 extern void intel_dp_check_link_status(struct intel_dp *intel_dp);
-extern bool intel_dp_mode_fixup(struct drm_encoder *encoder,
-                                const struct drm_display_mode *mode,
-                                struct drm_display_mode *adjusted_mode);
+extern bool intel_dp_compute_config(struct intel_encoder *encoder,
+                                    struct intel_crtc_config *pipe_config);
 extern bool intel_dpd_is_edp(struct drm_device *dev);
 extern void ironlake_edp_backlight_on(struct intel_dp *intel_dp);
 extern void ironlake_edp_backlight_off(struct intel_dp *intel_dp);
diff --git a/drivers/gpu/drm/i915/intel_hdmi.c b/drivers/gpu/drm/i915/intel_hdmi.c
index b9a83d7c804b..b588e6c547e2 100644
--- a/drivers/gpu/drm/i915/intel_hdmi.c
+++ b/drivers/gpu/drm/i915/intel_hdmi.c
@@ -768,11 +768,12 @@ static int intel_hdmi_mode_valid(struct drm_connector *connector,
         return MODE_OK;
 }
 
-bool intel_hdmi_mode_fixup(struct drm_encoder *encoder,
-                           const struct drm_display_mode *mode,
-                           struct drm_display_mode *adjusted_mode)
+bool intel_hdmi_compute_config(struct intel_encoder *encoder,
+                               struct intel_crtc_config *pipe_config)
 {
-        struct intel_hdmi *intel_hdmi = enc_to_intel_hdmi(encoder);
+        struct intel_hdmi *intel_hdmi = enc_to_intel_hdmi(&encoder->base);
+        struct drm_device *dev = encoder->base.dev;
+        struct drm_display_mode *adjusted_mode = &pipe_config->adjusted_mode;
 
         if (intel_hdmi->color_range_auto) {
                 /* See CEA-861-E - 5.1 Default Encoding Parameters */
@@ -786,6 +787,9 @@ bool intel_hdmi_mode_fixup(struct drm_encoder *encoder,
         if (intel_hdmi->color_range)
                 adjusted_mode->private_flags |= INTEL_MODE_LIMITED_COLOR_RANGE;
 
+        if (HAS_PCH_SPLIT(dev) && !HAS_DDI(dev))
+                pipe_config->has_pch_encoder = true;
+
         return true;
 }
 
@@ -937,7 +941,6 @@ static void intel_hdmi_destroy(struct drm_connector *connector)
 }
 
 static const struct drm_encoder_helper_funcs intel_hdmi_helper_funcs = {
-        .mode_fixup = intel_hdmi_mode_fixup,
         .mode_set = intel_hdmi_mode_set,
 };
 
@@ -1066,6 +1069,7 @@ void intel_hdmi_init(struct drm_device *dev, int hdmi_reg, enum port port)
                          DRM_MODE_ENCODER_TMDS);
         drm_encoder_helper_add(&intel_encoder->base, &intel_hdmi_helper_funcs);
 
+        intel_encoder->compute_config = intel_hdmi_compute_config;
         intel_encoder->enable = intel_enable_hdmi;
         intel_encoder->disable = intel_disable_hdmi;
         intel_encoder->get_hw_state = intel_hdmi_get_hw_state;
diff --git a/drivers/gpu/drm/i915/intel_lvds.c b/drivers/gpu/drm/i915/intel_lvds.c
index a2c516c116cb..9d6ed91b443d 100644
--- a/drivers/gpu/drm/i915/intel_lvds.c
+++ b/drivers/gpu/drm/i915/intel_lvds.c
@@ -331,6 +331,8 @@ static bool intel_lvds_compute_config(struct intel_encoder *intel_encoder,
                                adjusted_mode);
 
         if (HAS_PCH_SPLIT(dev)) {
+                pipe_config->has_pch_encoder = true;
+
                 intel_pch_panel_fitting(dev,
                                         intel_connector->panel.fitting_mode,
                                         mode, adjusted_mode);
diff --git a/drivers/gpu/drm/i915/intel_sdvo.c b/drivers/gpu/drm/i915/intel_sdvo.c
index 6912742378a1..5f3f9e9e661e 100644
--- a/drivers/gpu/drm/i915/intel_sdvo.c
+++ b/drivers/gpu/drm/i915/intel_sdvo.c
@@ -1047,6 +1047,9 @@ static bool intel_sdvo_compute_config(struct intel_encoder *encoder,
         struct drm_display_mode *adjusted_mode = &pipe_config->adjusted_mode;
         struct drm_display_mode *mode = &pipe_config->requested_mode;
 
+        if (HAS_PCH_SPLIT(encoder->base.dev))
+                pipe_config->has_pch_encoder = true;
+
         /* We need to construct preferred input timings based on our
          * output timings.  To do that, we have to set the output
          * timings, even though this isn't really the right place in