1 files changed, 46 insertions, 5 deletions

diff --git a/drivers/gpu/drm/radeon/radeon_bios.c b/drivers/gpu/drm/radeon/radeon_bios.c
index 906921740c60..8ad71f701316 100644
--- a/drivers/gpu/drm/radeon/radeon_bios.c
+++ b/drivers/gpu/drm/radeon/radeon_bios.c
@@ -30,6 +30,8 @@
 #include "radeon.h"
 #include "atom.h"
 
+#include <linux/vga_switcheroo.h>
+#include <linux/slab.h>
 /*
  * BIOS.
  */
@@ -62,7 +64,7 @@ static bool igp_read_bios_from_vram(struct radeon_device *rdev)
                 iounmap(bios);
                 return false;
         }
-        memcpy(rdev->bios, bios, size);
+        memcpy_fromio(rdev->bios, bios, size);
         iounmap(bios);
         return true;
 }
@@ -93,6 +95,38 @@ static bool radeon_read_bios(struct radeon_device *rdev)
         return true;
 }
 
+/* ATRM is used to get the BIOS on the discrete cards in
+ * dual-gpu systems.
+ */
+static bool radeon_atrm_get_bios(struct radeon_device *rdev)
+{
+        int ret;
+        int size = 64 * 1024;
+        int i;
+
+        if (!radeon_atrm_supported(rdev->pdev))
+                return false;
+
+        rdev->bios = kmalloc(size, GFP_KERNEL);
+        if (!rdev->bios) {
+                DRM_ERROR("Unable to allocate bios\n");
+                return false;
+        }
+
+        for (i = 0; i < size / ATRM_BIOS_PAGE; i++) {
+                ret = radeon_atrm_get_bios_chunk(rdev->bios,
+                                                 (i * ATRM_BIOS_PAGE),
+                                                 ATRM_BIOS_PAGE);
+                if (ret <= 0)
+                        break;
+        }
+
+        if (i == 0 || rdev->bios[0] != 0x55 || rdev->bios[1] != 0xaa) {
+                kfree(rdev->bios);
+                return false;
+        }
+        return true;
+}
 static bool r700_read_disabled_bios(struct radeon_device *rdev)
 {
         uint32_t viph_control;
@@ -388,16 +422,16 @@ static bool radeon_read_disabled_bios(struct radeon_device *rdev)
                 return legacy_read_disabled_bios(rdev);
 }
 
+
 bool radeon_get_bios(struct radeon_device *rdev)
 {
         bool r;
         uint16_t tmp;
 
-        if (rdev->flags & RADEON_IS_IGP) {
+        r = radeon_atrm_get_bios(rdev);
+        if (r == false)
                 r = igp_read_bios_from_vram(rdev);
-                if (r == false)
-                        r = radeon_read_bios(rdev);
-        } else
+        if (r == false)
                 r = radeon_read_bios(rdev);
         if (r == false) {
                 r = radeon_read_disabled_bios(rdev);
@@ -408,6 +442,13 @@ bool radeon_get_bios(struct radeon_device *rdev)
                 return false;
         }
         if (rdev->bios[0] != 0x55 || rdev->bios[1] != 0xaa) {
+                printk("BIOS signature incorrect %x %x\n", rdev->bios[0], rdev->bios[1]);
+                goto free_bios;
+        }
+
+        tmp = RBIOS16(0x18);
+        if (RBIOS8(tmp + 0x14) != 0x0) {
+                DRM_INFO("Not an x86 BIOS ROM, not using.\n");
                 goto free_bios;
         }