drm/i915: Use pipe A primary plane .max_stride() as the global stride limit (645d91f6) · Commits · 戴 / test

drivers/gpu/drm/i915/intel_display.c

+10 −23

Original line number	Diff line number	Diff line
		@@ -14432,31 +14432,18 @@ static
		u32 intel_fb_pitch_limit(struct drm_i915_private *dev_priv,
		uint64_t fb_modifier, uint32_t pixel_format)
		{
		u32 gen = INTEL_GEN(dev_priv);

		if (gen >= 9) {
		int cpp = drm_format_plane_cpp(pixel_format, 0);
		struct intel_crtc *crtc;
		struct intel_plane *plane;

		/* "The stride in bytes must not exceed the of the size of 8K
		* pixels and 32K bytes."
		/*
		* We assume the primary plane for pipe A has
		* the highest stride limits of them all.
		*/
		return min(8192 * cpp, 32768);
		} else if (gen >= 5 && !HAS_GMCH_DISPLAY(dev_priv)) {
		return 32*1024;
		} else if (gen >= 4) {
		if (fb_modifier == I915_FORMAT_MOD_X_TILED)
		return 16*1024;
		else
		return 32*1024;
		} else if (gen >= 3) {
		if (fb_modifier == I915_FORMAT_MOD_X_TILED)
		return 8*1024;
		else
		return 16*1024;
		} else {
		/* XXX DSPC is limited to 4k tiled */
		return 8*1024;
		}
		crtc = intel_get_crtc_for_pipe(dev_priv, PIPE_A);
		plane = to_intel_plane(crtc->base.primary);

		return plane->max_stride(plane, pixel_format, fb_modifier,
		DRM_MODE_ROTATE_0);
		}

		static int intel_framebuffer_init(struct intel_framebuffer *intel_fb,