intel_fb_drv: Aperture exhaustion and display IRQ patch

* display an error in case the aperture is too small for all
  framebuffers
* handle display engine IRQs only

issue #4233

repos/dde_linux/patches/intel_fb_aperture_de_irq.patch

@@ -0,0 +1,26 @@
+Exit upon exhaustion of aperature and handle display engine IRQs only.
+
+--- a/drivers/gpu/drm/i915/i915_gem_gtt.c
++++ b/drivers/gpu/drm/i915/i915_gem_gtt.c
+@@ -4007,6 +4007,8 @@
+ 	if (flags & PIN_NOEVICT)
+ 		return -ENOSPC;
+ 
++	aperture_exit();
++
+ 	/* No free space, pick a slot at random.
+ 	 *
+ 	 * There is a pathological case here using a GTT shared between
+--- a/drivers/gpu/drm/i915/i915_irq.c
++++ b/drivers/gpu/drm/i915/i915_irq.c
+@@ -2699,8 +2699,8 @@
+ 	disable_rpm_wakeref_asserts(dev_priv);
+ 
+ 	/* Find, clear, then process each source of interrupt */
+-	ret = gen8_gt_irq_ack(dev_priv, master_ctl, gt_iir);
+-	gen8_gt_irq_handler(dev_priv, gt_iir);
++	//ret = gen8_gt_irq_ack(dev_priv, master_ctl, gt_iir);
++	//gen8_gt_irq_handler(dev_priv, gt_iir);
+ 	ret |= gen8_de_irq_handler(dev_priv, master_ctl);
+ 
+ 	I915_WRITE_FW(GEN8_MASTER_IRQ, GEN8_MASTER_IRQ_CONTROL);

repos/dde_linux/ports/dde_linux.hash

@@ -1 +1 @@
-8a88c22df242631ae38c2bf58d6d7b24a6fa18d1
+017ed559d35da47f9df49d5ac1c3c7ef26b0491e

repos/dde_linux/ports/dde_linux.port

@@ -207,6 +207,7 @@ PATCH_OPT(patches/intel_fb_drm.patch)       := -p1 -d$(SRC_DIR_INTEL_FB)
 PATCH_OPT(patches/intel_fb_early.patch)     := -p1 -d$(SRC_DIR_INTEL_FB)
 # drop it when https://bugs.freedesktop.org/show_bug.cgi?id=107125 gets fixed
 PATCH_OPT(patches/intel_fb_hotplug.patch)   := -p1 -d$(SRC_DIR_INTEL_FB)
+PATCH_OPT(patches/intel_fb_aperture_de_irq.patch):= -p1 -d$(SRC_DIR_INTEL_FB)
 
 # Freescale NIC
 PATCH_OPT(patches/fec_skbuff_cast.patch) := -p1 -d$(SRC_DIR_FEC)

repos/dde_linux/src/drivers/framebuffer/intel/include/lx_emul.h

@@ -2725,6 +2725,8 @@ void tasklet_disable(struct tasklet_struct *);
 void enable_irq(unsigned int);
 void disable_irq(unsigned int);
 
+void aperture_exit(void);
+
 #include <linux/math64.h>
 
 #include <legacy/lx_emul/extern_c_end.h>

repos/dde_linux/src/drivers/framebuffer/intel/lx_emul.cc

@@ -1994,4 +1994,11 @@ int acpi_reconfig_notifier_register(struct notifier_block *nb)
 	return 0;
 }
 
+
+void aperture_exit()
+{
+	Genode::error("Error: no space in aperture left");
+	Lx_kit::env().env().parent().exit(1);
+}
+
 } /* extern "C" */