drm/nouveau/pm: improve memtiming mappings

Improvements:
 - Fix bug in switch statement
 - Add parts of 0x10022c, 0x10023c
 - Clean up 0x100234
 - Comment out assumption in 0x100228 until verified

Signed-off-by: Roy Spliet <r.spliet@student.tudelft.nl>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

diff --git a/drivers/gpu/drm/nouveau/nouveau_mem.c b/drivers/gpu/drm/nouveau/nouveau_mem.c
index ac3bec0..fe4a30d 100644 (file)
--- a/drivers/gpu/drm/nouveau/nouveau_mem.c
+++ b/drivers/gpu/drm/nouveau/nouveau_mem.c
@@ -651,6 +651,7 @@ nouveau_mem_gart_init(struct drm_device *dev)
 void
 nouveau_mem_timing_init(struct drm_device *dev)
 {
+       /* cards < NVC0 only */
        struct drm_nouveau_private *dev_priv = dev->dev_private;
        struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
        struct nouveau_pm_memtimings *memtimings = &pm->memtimings;
@@ -717,14 +718,14 @@ nouveau_mem_timing_init(struct drm_device *dev)
                tUNK_19 = 1;
                tUNK_20 = 0;
                tUNK_21 = 0;
-               switch (min(recordlen, 21)) {
-               case 21:
+               switch (min(recordlen, 22)) {
+               case 22:
                        tUNK_21 = entry[21];
-               case 20:
+               case 21:
                        tUNK_20 = entry[20];
-               case 19:
+               case 20:
                        tUNK_19 = entry[19];
-               case 18:
+               case 19:
                        tUNK_18 = entry[18];
                default:
                        tUNK_0  = entry[0];
@@ -754,24 +755,30 @@ nouveau_mem_timing_init(struct drm_device *dev)
                timing->reg_100228 = (tUNK_12 << 16 | tUNK_11 << 8 | tUNK_10);
                if(recordlen > 19) {
                        timing->reg_100228 += (tUNK_19 - 1) << 24;
-               } else {
+               }/* I cannot back-up this else-statement right now
+                        else {
                        timing->reg_100228 += tUNK_12 << 24;
-               }
+               }*/
 
                /* XXX: reg_10022c */
+               timing->reg_10022c = tUNK_2 - 1;
 
                timing->reg_100230 = (tUNK_20 << 24 | tUNK_21 << 16 |
                                      tUNK_13 << 8  | tUNK_13);
 
                /* XXX: +6? */
                timing->reg_100234 = (tRAS << 24 | (tUNK_19 + 6) << 8 | tRC);
-               if(tUNK_10 > tUNK_11) {
-                       timing->reg_100234 += tUNK_10 << 16;
-               } else {
-                       timing->reg_100234 += tUNK_11 << 16;
+               timing->reg_100234 += max(tUNK_10,tUNK_11) << 16;
+
+               /* XXX; reg_100238, reg_10023c
+                * reg: 0x00??????
+                * reg_10023c:
+                *      0 for pre-NV50 cards
+                *      0x????0202 for NV50+ cards (empirical evidence) */
+               if(dev_priv->card_type >= NV_50) {
+                       timing->reg_10023c = 0x202;
                }
 
-               /* XXX; reg_100238, reg_10023c */
                NV_DEBUG(dev, "Entry %d: 220: %08x %08x %08x %08x\n", i,
                         timing->reg_100220, timing->reg_100224,
                         timing->reg_100228, timing->reg_10022c);