drm/i915: Fix wrongly populated plane possible_crtcs bit mask

As a disabled pipe in pipe_mask is not having a valid intel crtc,
driver wrongly populates the possible_crtcs mask while initializing
the plane for a CRTC. Fixing up the plane possible_crtcs mask.

changes since RFC:
- Simplify the possible_crtcs initialization. [Ville]
v2:
- Removed the unnecessary stack garbage possible_crtcs to
  drm_universal_plane_init. [Ville]
v3:
- Combine the intel_crtc assignment and declaration. [Ville]
v4:
- Fix possible_crtcs abused bits from
  intel_{primary,curosr,sprite}_plane_create(). [Ville]

Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Anshuman Gupta <anshuman.gupta@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200226163517.31234-1-anshuman.gupta@intel.com

diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
index ab2e245..97fa170 100644 (file)
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -16331,7 +16331,6 @@ intel_primary_plane_create(struct drm_i915_private *dev_priv, enum pipe pipe)
        struct intel_plane *plane;
        const struct drm_plane_funcs *plane_funcs;
        unsigned int supported_rotations;
-       unsigned int possible_crtcs;
        const u32 *formats;
        int num_formats;
        int ret, zpos;
@@ -16412,18 +16411,16 @@ intel_primary_plane_create(struct drm_i915_private *dev_priv, enum pipe pipe)
        plane->get_hw_state = i9xx_plane_get_hw_state;
        plane->check_plane = i9xx_plane_check;
 
-       possible_crtcs = BIT(pipe);
-
        if (INTEL_GEN(dev_priv) >= 5 || IS_G4X(dev_priv))
                ret = drm_universal_plane_init(&dev_priv->drm, &plane->base,
-                                              possible_crtcs, plane_funcs,
+                                              0, plane_funcs,
                                               formats, num_formats,
                                               i9xx_format_modifiers,
                                               DRM_PLANE_TYPE_PRIMARY,
                                               "primary %c", pipe_name(pipe));
        else
                ret = drm_universal_plane_init(&dev_priv->drm, &plane->base,
-                                              possible_crtcs, plane_funcs,
+                                              0, plane_funcs,
                                               formats, num_formats,
                                               i9xx_format_modifiers,
                                               DRM_PLANE_TYPE_PRIMARY,
@@ -16465,7 +16462,6 @@ static struct intel_plane *
 intel_cursor_plane_create(struct drm_i915_private *dev_priv,
                          enum pipe pipe)
 {
-       unsigned int possible_crtcs;
        struct intel_plane *cursor;
        int ret, zpos;
 
@@ -16498,10 +16494,8 @@ intel_cursor_plane_create(struct drm_i915_private *dev_priv,
        if (IS_I845G(dev_priv) || IS_I865G(dev_priv) || HAS_CUR_FBC(dev_priv))
                cursor->cursor.size = ~0;
 
-       possible_crtcs = BIT(pipe);
-
        ret = drm_universal_plane_init(&dev_priv->drm, &cursor->base,
-                                      possible_crtcs, &intel_cursor_plane_funcs,
+                                      0, &intel_cursor_plane_funcs,
                                       intel_cursor_formats,
                                       ARRAY_SIZE(intel_cursor_formats),
                                       cursor_format_modifiers,
@@ -16623,6 +16617,18 @@ static void intel_crtc_free(struct intel_crtc *crtc)
        kfree(crtc);
 }
 
+static void intel_plane_possible_crtcs_init(struct drm_i915_private *dev_priv)
+{
+       struct intel_plane *plane;
+
+       for_each_intel_plane(&dev_priv->drm, plane) {
+               struct intel_crtc *crtc = intel_get_crtc_for_pipe(dev_priv,
+                                                                 plane->pipe);
+
+               plane->base.possible_crtcs = drm_crtc_mask(&crtc->base);
+       }
+}
+
 static int intel_crtc_init(struct drm_i915_private *dev_priv, enum pipe pipe)
 {
        struct intel_plane *primary, *cursor;
@@ -17847,6 +17853,7 @@ int intel_modeset_init(struct drm_i915_private *i915)
                }
        }
 
+       intel_plane_possible_crtcs_init(i915);
        intel_shared_dpll_init(dev);
        intel_update_fdi_pll_freq(i915);
 

diff --git a/drivers/gpu/drm/i915/display/intel_sprite.c b/drivers/gpu/drm/i915/display/intel_sprite.c
index 22ad6dd..db80367 100644 (file)
--- a/drivers/gpu/drm/i915/display/intel_sprite.c
+++ b/drivers/gpu/drm/i915/display/intel_sprite.c
@@ -3031,7 +3031,6 @@ skl_universal_plane_create(struct drm_i915_private *dev_priv,
        struct intel_plane *plane;
        enum drm_plane_type plane_type;
        unsigned int supported_rotations;
-       unsigned int possible_crtcs;
        const u64 *modifiers;
        const u32 *formats;
        int num_formats;
@@ -3086,10 +3085,8 @@ skl_universal_plane_create(struct drm_i915_private *dev_priv,
        else
                plane_type = DRM_PLANE_TYPE_OVERLAY;
 
-       possible_crtcs = BIT(pipe);
-
        ret = drm_universal_plane_init(&dev_priv->drm, &plane->base,
-                                      possible_crtcs, plane_funcs,
+                                      0, plane_funcs,
                                       formats, num_formats, modifiers,
                                       plane_type,
                                       "plane %d%c", plane_id + 1,
@@ -3140,7 +3137,6 @@ intel_sprite_plane_create(struct drm_i915_private *dev_priv,
 {
        struct intel_plane *plane;
        const struct drm_plane_funcs *plane_funcs;
-       unsigned long possible_crtcs;
        unsigned int supported_rotations;
        const u64 *modifiers;
        const u32 *formats;
@@ -3225,10 +3221,8 @@ intel_sprite_plane_create(struct drm_i915_private *dev_priv,
        plane->id = PLANE_SPRITE0 + sprite;
        plane->frontbuffer_bit = INTEL_FRONTBUFFER(pipe, plane->id);
 
-       possible_crtcs = BIT(pipe);
-
        ret = drm_universal_plane_init(&dev_priv->drm, &plane->base,
-                                      possible_crtcs, plane_funcs,
+                                      0, plane_funcs,
                                       formats, num_formats, modifiers,
                                       DRM_PLANE_TYPE_OVERLAY,
                                       "sprite %c", sprite_name(pipe, sprite));