drm/i915: Move number of scalers initialization to runtime init

Commit Message

Nabendu Maiti Nov. 23, 2016, 1:57 p.m. UTC

In future patches, we require greater flexibility in describing
the number of scalers available on each CRTC. To ease that transition
we move the current assignment to intel_device_info. Scaler structure
initialisation is done if scaler is available on the CRTC.

Gen9 check is not required as depending on numbers of scalers we
initialize scalers or return without doing anything in skl_init_scalers.

Signed-off-by: Nabendu Maiti <[e-mail]>
---
 drivers/gpu/drm/i915/i915_debugfs.c      |  2 +-
 drivers/gpu/drm/i915/i915_drv.h          |  1 +
 drivers/gpu/drm/i915/intel_device_info.c |  3 +++
 drivers/gpu/drm/i915/intel_display.c     | 18 ++++++++----------
 4 files changed, 13 insertions(+), 11 deletions(-)

Patch

diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index b7f42c4..8349abe 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -3080,7 +3080,7 @@  static void intel_scaler_info(struct seq_file *m, struct intel_crtc *intel_crtc)
 			   pipe_config->scaler_state.scaler_users,
 			   pipe_config->scaler_state.scaler_id);
 
-		for (i = 0; i < SKL_NUM_SCALERS; i++) {
+		for (i = 0; i < num_scalers; i++) {
 			struct intel_scaler *sc =
 					&pipe_config->scaler_state.scalers[i];
 
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index be67aee..6eed9c2 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -731,6 +731,7 @@  struct intel_device_info {
 	u16 device_id;
 	u8 num_pipes;
 	u8 num_sprites[I915_MAX_PIPES];
+	u8 num_scalers[I915_MAX_PIPES];
 	u8 gen;
 	u16 gen_mask;
 	u8 ring_mask; /* Rings supported by the HW */
diff --git a/drivers/gpu/drm/i915/intel_device_info.c b/drivers/gpu/drm/i915/intel_device_info.c
index 185e3bb..ef26fa8 100644
--- a/drivers/gpu/drm/i915/intel_device_info.c
+++ b/drivers/gpu/drm/i915/intel_device_info.c
@@ -282,6 +282,9 @@  void intel_device_info_runtime_init(struct drm_i915_private *dev_priv)
 		info->num_sprites[PIPE_A] = 2;
 		info->num_sprites[PIPE_B] = 2;
 		info->num_sprites[PIPE_C] = 1;
+		info->num_scalers[PIPE_A] = 2;
+		info->num_scalers[PIPE_B] = 2;
+		info->num_scalers[PIPE_C] = 1;
 	} else if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) {
 		for_each_pipe(dev_priv, pipe)
 			info->num_sprites[pipe] = 2;
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index bd2c99e..331131d 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -15237,6 +15237,11 @@  static void skl_init_scalers(struct drm_i915_private *dev_priv,
 		&crtc_state->scaler_state;
 	int i;
 
+	crtc->num_scalers = dev_priv->info.num_scalers[crtc->pipe];
+
+	if (!crtc->num_scalers)
+		return;
+
 	for (i = 0; i < crtc->num_scalers; i++) {
 		struct intel_scaler *scaler = &scaler_state->scalers[i];
 
@@ -15268,16 +15273,6 @@  static int intel_crtc_init(struct drm_i915_private *dev_priv, enum pipe pipe)
 	intel_crtc->base.state = &crtc_state->base;
 	crtc_state->base.crtc = &intel_crtc->base;
 
-	/* initialize shared scalers */
-	if (INTEL_GEN(dev_priv) >= 9) {
-		if (pipe == PIPE_C)
-			intel_crtc->num_scalers = 1;
-		else
-			intel_crtc->num_scalers = SKL_NUM_SCALERS;
-
-		skl_init_scalers(dev_priv, intel_crtc, crtc_state);
-	}
-
 	primary = intel_primary_plane_create(dev_priv, pipe);
 	if (IS_ERR(primary)) {
 		ret = PTR_ERR(primary);
@@ -15316,6 +15311,9 @@  static int intel_crtc_init(struct drm_i915_private *dev_priv, enum pipe pipe)
 
 	intel_crtc->wm.cxsr_allowed = true;
 
+	/* initialize shared scalers */
+	skl_init_scalers(dev_priv, intel_crtc, crtc_state);
+
 	BUG_ON(pipe >= ARRAY_SIZE(dev_priv->plane_to_crtc_mapping) ||
 	       dev_priv->plane_to_crtc_mapping[intel_crtc->plane] != NULL);
 	dev_priv->plane_to_crtc_mapping[intel_crtc->plane] = intel_crtc;