diff options
| author | Ben Skeggs <bskeggs@redhat.com> | 2011-10-14 16:19:42 +1000 |
|---|---|---|
| committer | Ben Skeggs <bskeggs@redhat.com> | 2011-12-21 19:01:19 +1000 |
| commit | 0f6ea564dec79271878b03884a978062bf86eb2a (patch) | |
| tree | 55297ac38860af281bac58068dc67619e7498829 /drivers/gpu/drm/nouveau/nv50_display.c | |
| parent | b98e3f5c9e42f70c171f67331773a575441eab3b (diff) | |
drm/nv50/disp: completely reset disp if master evo channel active at init
Should fix issues with kexec, and as a nice side bonus, the code to avoid
having PDISP disappear will also fix hibernate on those effected systems.
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Diffstat (limited to 'drivers/gpu/drm/nouveau/nv50_display.c')
| -rw-r--r-- | drivers/gpu/drm/nouveau/nv50_display.c | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/nv50_display.c b/drivers/gpu/drm/nouveau/nv50_display.c index a37e32e00ec..cfd7a827847 100644 --- a/drivers/gpu/drm/nouveau/nv50_display.c +++ b/drivers/gpu/drm/nouveau/nv50_display.c @@ -50,9 +50,50 @@ nv50_sor_nr(struct drm_device *dev) return 4; } +static int +evo_icmd(struct drm_device *dev, int ch, u32 mthd, u32 data) +{ + int ret = 0; + if (nouveau_reg_debug & NOUVEAU_REG_DEBUG_EVO) + NV_INFO(dev, "EvoPIO: %d 0x%04x 0x%08x\n", ch, mthd, data); + nv_mask(dev, 0x610300 + (ch * 0x08), 0x00000001, 0x00000001); + nv_wr32(dev, 0x610304 + (ch * 0x08), data); + nv_wr32(dev, 0x610300 + (ch * 0x08), 0x80000001 | mthd); + if (!nv_wait(dev, 0x610300 + (ch * 0x08), 0x80000000, 0x00000000)) + ret = -EBUSY; + nv_mask(dev, 0x610300 + (ch * 0x08), 0x00000001, 0x00000000); + return ret; +} + int nv50_display_early_init(struct drm_device *dev) { + int i; + /* check if master evo channel is already active, a good a sign as any + * that the display engine is in a weird state (hibernate/kexec), if + * it is, do our best to reset the display engine... + */ + if (nv_rd32(dev, 0x610200) & 0x00000001) { + NV_INFO(dev, "PDISP: already active, attempting to reset...\n"); + + /* deactivate both heads first, PDISP will disappear forever + * (well, until you power cycle) on some boards as soon as + * PMC_ENABLE is hit unless they are.. + */ + for (i = 0; i < 2; i++) { + evo_icmd(dev, 0, 0x0880 + (i * 0x400), 0x05000000); + evo_icmd(dev, 0, 0x089c + (i * 0x400), 0); + evo_icmd(dev, 0, 0x0840 + (i * 0x400), 0); + evo_icmd(dev, 0, 0x0844 + (i * 0x400), 0); + evo_icmd(dev, 0, 0x085c + (i * 0x400), 0); + evo_icmd(dev, 0, 0x0874 + (i * 0x400), 0); + } + evo_icmd(dev, 0, 0x0080, 0); + + /* reset PDISP */ + nv_mask(dev, 0x000200, 0x40000000, 0x00000000); + nv_mask(dev, 0x000200, 0x40000000, 0x40000000); + } return 0; } |