drm/i915: Decouple i915_gem_dumb_create() from the display a bit

Pass the device argument as drm_device to intel_plane_fb_max_stride()
to decouple i915_gem_dumb_create() vs. the display code a bit.

xe currently doesn't even call this, but it probably should...

v2: s/dev/drm/ (Jani)

Reviewed-by: Jani Nikula <[e-mail]>
Signed-off-by: Ville Syrjälä <[e-mail]>
Link: https://patchwork.freedesktop.org/patch/msgid/[e-mail]

drivers/gpu/drm/i915/display/intel_display.c

···
 	*y += state->view.color_plane[color_plane].y;
 }
 
-u32 intel_plane_fb_max_stride(struct drm_i915_private *dev_priv,
+u32 intel_plane_fb_max_stride(struct drm_device *drm,
 			      u32 pixel_format, u64 modifier)
 {
+	struct intel_display *display = to_intel_display(drm);
+	struct drm_i915_private *dev_priv = to_i915(drm);
 	struct intel_crtc *crtc;
 	struct intel_plane *plane;
 
-	if (!HAS_DISPLAY(dev_priv))
+	if (!HAS_DISPLAY(display))
 		return 0;
 
 	/*

drivers/gpu/drm/i915/display/intel_display.h

···
 			    int pixel_clock, int link_clock,
 			    int bw_overhead,
 			    struct intel_link_m_n *m_n);
-u32 intel_plane_fb_max_stride(struct drm_i915_private *dev_priv,
+u32 intel_plane_fb_max_stride(struct drm_device *drm,
 			      u32 pixel_format, u64 modifier);
 enum drm_mode_status
 intel_mode_valid_max_plane_size(struct drm_i915_private *dev_priv,

drivers/gpu/drm/i915/display/intel_fb.c

···
 	 */
 	if (DISPLAY_VER(dev_priv) < 4 || intel_fb_is_ccs_modifier(modifier) ||
 	    intel_fb_modifier_uses_dpt(dev_priv, modifier))
-		return intel_plane_fb_max_stride(dev_priv, pixel_format, modifier);
+		return intel_plane_fb_max_stride(&dev_priv->drm, pixel_format, modifier);
 	else if (DISPLAY_VER(dev_priv) >= 7)
 		return 256 * 1024;
 	else
···
 	unsigned int tile_width;
 
 	if (is_surface_linear(fb, color_plane)) {
-		unsigned int max_stride = intel_plane_fb_max_stride(dev_priv,
+		unsigned int max_stride = intel_plane_fb_max_stride(&dev_priv->drm,
 								    fb->format->format,
 								    fb->modifier);
 

drivers/gpu/drm/i915/gem/i915_gem_create.c

···
 	args->pitch = ALIGN(args->width * cpp, 64);
 
 	/* align stride to page size so that we can remap */
-	if (args->pitch > intel_plane_fb_max_stride(to_i915(dev), format,
+	if (args->pitch > intel_plane_fb_max_stride(dev, format,
 						    DRM_FORMAT_MOD_LINEAR))
 		args->pitch = ALIGN(args->pitch, 4096);