[PATCH v3 39/44] drm/nouveau/kms/nv50-: create heads based on nvkm head mask

From: Lyude Paul
Date: Tue Sep 19 2023 - 18:10:53 EST


From: Ben Skeggs <bskeggs@xxxxxxxxxx>

No need to go poking HW directly, and probably shouldn't on GSP-RM.

Signed-off-by: Ben Skeggs <bskeggs@xxxxxxxxxx>
Reviewed-by: Lyude Paul <lyude@xxxxxxxxxx>
Acked-by: Danilo Krummrich <me@xxxxxxxx>
Signed-off-by: Lyude Paul <lyude@xxxxxxxxxx>
---
drivers/gpu/drm/nouveau/dispnv50/disp.c | 18 +++---------------
1 file changed, 3 insertions(+), 15 deletions(-)

diff --git a/drivers/gpu/drm/nouveau/dispnv50/disp.c b/drivers/gpu/drm/nouveau/dispnv50/disp.c
index d6de5ee89d543..2134502ec04e2 100644
--- a/drivers/gpu/drm/nouveau/dispnv50/disp.c
+++ b/drivers/gpu/drm/nouveau/dispnv50/disp.c
@@ -2692,13 +2692,12 @@ nv50_display_destroy(struct drm_device *dev)
int
nv50_display_create(struct drm_device *dev)
{
- struct nvif_device *device = &nouveau_drm(dev)->client.device;
struct nouveau_drm *drm = nouveau_drm(dev);
struct dcb_table *dcb = &drm->vbios.dcb;
struct drm_connector *connector, *tmp;
struct nv50_disp *disp;
struct dcb_output *dcbe;
- int crtcs, ret, i;
+ int ret, i;
bool has_mst = nv50_has_mst(drm);

disp = kzalloc(sizeof(*disp), GFP_KERNEL);
@@ -2776,20 +2775,9 @@ nv50_display_create(struct drm_device *dev)
}

/* create crtc objects to represent the hw heads */
- if (disp->disp->object.oclass >= GV100_DISP)
- crtcs = nvif_rd32(&device->object, 0x610060) & 0xff;
- else
- if (disp->disp->object.oclass >= GF110_DISP)
- crtcs = nvif_rd32(&device->object, 0x612004) & 0xf;
- else
- crtcs = 0x3;
-
- for (i = 0; i < fls(crtcs); i++) {
+ for_each_set_bit(i, &disp->disp->head_mask, sizeof(disp->disp->head_mask) * 8) {
struct nv50_head *head;

- if (!(crtcs & (1 << i)))
- continue;
-
head = nv50_head_create(dev, i);
if (IS_ERR(head)) {
ret = PTR_ERR(head);
@@ -2814,7 +2802,7 @@ nv50_display_create(struct drm_device *dev)
* Once these issues are closed, this should be
* removed
*/
- head->msto->encoder.possible_crtcs = crtcs;
+ head->msto->encoder.possible_crtcs = disp->disp->head_mask;
}
}

--
2.41.0