From 79af598a5baefc3a92b31ebc5b7aff00b38dc633 Mon Sep 17 00:00:00 2001 From: Lyude Paul Date: Wed, 17 Mar 2021 19:01:46 -0400 Subject: [PATCH] drm/nouveau/kms/nv50-: Always validate LUTs in nv50_head_atomic_check_lut() When it comes to gamma or degamma luts, nouveau will actually skip the calculation of certain LUTs depending on the head and plane states. For instance, when the head is disabled we don't perform any error checking on the gamma LUT, and likewise if no planes are present and enabled in our atomic state we will skip error checking the degamma LUT. This is a bit of a problem though, since the per-head gamma and degamma props in DRM can be changed even while a head is disabled - a situation which can be triggered by the igt testcase mentioned down below. Originally I thought this was a bit silly and was tempted to just fix the igt test to only set gamma/degamma with the head enabled. After a bit of thinking though I realized we should fix this in nouveau. This is because if a program decides to set an invalid LUT for a head before enabling the head, such a property change would succeed while also making it impossible to turn the head back on until the LUT is removed or corrected - something that could be painful for a user to figure out. So, fix this checking both degamma and gamma LUTs unconditionally during atomic checks. We start by calling nv50_head_atomic_check_lut() regardless of whether the head is active or not in nv50_head_atomic_check(). Then we move the ilut error checking into nv50_head_atomic_check_lut() and add a per-head hook for it, primarily because as a per-CRTC property DRM we want the LUT to be error checked by the head any time it's included in an atomic state. Of course though, actual programming of the degamma lut to hardware is still handled in each plane's atomic check and commit. Signed-off-by: Lyude Paul Testcase: igt/kms_color/pipe-invalid-*-lut-sizes Signed-off-by: Ben Skeggs Reviewed-by: Karol Herbst Signed-off-by: Karol Herbst Link: https://gitlab.freedesktop.org/drm/nouveau/-/merge_requests/10 --- drivers/gpu/drm/nouveau/dispnv50/base907c.c | 6 +---- drivers/gpu/drm/nouveau/dispnv50/head.c | 30 +++++++++++++++------ drivers/gpu/drm/nouveau/dispnv50/head.h | 2 ++ drivers/gpu/drm/nouveau/dispnv50/head907d.c | 6 +++++ drivers/gpu/drm/nouveau/dispnv50/head917d.c | 1 + drivers/gpu/drm/nouveau/dispnv50/headc37d.c | 1 + drivers/gpu/drm/nouveau/dispnv50/headc57d.c | 1 + drivers/gpu/drm/nouveau/dispnv50/wndw.c | 5 +--- drivers/gpu/drm/nouveau/dispnv50/wndw.h | 4 +-- drivers/gpu/drm/nouveau/dispnv50/wndwc37e.c | 6 +---- drivers/gpu/drm/nouveau/dispnv50/wndwc57e.c | 7 +++-- 11 files changed, 41 insertions(+), 28 deletions(-) diff --git a/drivers/gpu/drm/nouveau/dispnv50/base907c.c b/drivers/gpu/drm/nouveau/dispnv50/base907c.c index 5396e3707cc44..e6b0417c325ba 100644 --- a/drivers/gpu/drm/nouveau/dispnv50/base907c.c +++ b/drivers/gpu/drm/nouveau/dispnv50/base907c.c @@ -103,12 +103,9 @@ base907c_xlut_set(struct nv50_wndw *wndw, struct nv50_wndw_atom *asyw) return 0; } -static bool +static void base907c_ilut(struct nv50_wndw *wndw, struct nv50_wndw_atom *asyw, int size) { - if (size != 256 && size != 1024) - return false; - if (size == 1024) asyw->xlut.i.mode = NV907C_SET_BASE_LUT_LO_MODE_INTERPOLATE_1025_UNITY_RANGE; else @@ -116,7 +113,6 @@ base907c_ilut(struct nv50_wndw *wndw, struct nv50_wndw_atom *asyw, int size) asyw->xlut.i.enable = NV907C_SET_BASE_LUT_LO_ENABLE_ENABLE; asyw->xlut.i.load = head907d_olut_load; - return true; } static inline u32 diff --git a/drivers/gpu/drm/nouveau/dispnv50/head.c b/drivers/gpu/drm/nouveau/dispnv50/head.c index ca8b292c86389..f8438a886b646 100644 --- a/drivers/gpu/drm/nouveau/dispnv50/head.c +++ b/drivers/gpu/drm/nouveau/dispnv50/head.c @@ -230,9 +230,20 @@ nv50_head_atomic_check_lut(struct nv50_head *head, struct drm_crtc *crtc = &head->base.base; struct nv50_disp *disp = nv50_disp(dev); struct nouveau_drm *drm = nouveau_drm(dev); - struct drm_property_blob *olut = asyh->state.gamma_lut; + struct drm_property_blob *olut = asyh->state.gamma_lut, + *ilut = asyh->state.degamma_lut; int size; + /* Ensure that the ilut is valid */ + if (ilut) { + size = drm_color_lut_size(ilut); + if (!head->func->ilut_check(size)) { + NV_ATOMIC(drm, "Invalid size %d for degamma on [CRTC:%d:%s]\n", + size, crtc->base.id, crtc->name); + return -EINVAL; + } + } + /* Determine whether core output LUT should be enabled. */ if (olut) { /* Check if any window(s) have stolen the core output LUT @@ -334,8 +345,17 @@ nv50_head_atomic_check(struct drm_crtc *crtc, struct drm_atomic_state *state) struct drm_connector_state *conns; struct drm_connector *conn; int i, ret; + bool check_lut = asyh->state.color_mgmt_changed || + memcmp(&armh->wndw, &asyh->wndw, sizeof(asyh->wndw)); NV_ATOMIC(drm, "%s atomic_check %d\n", crtc->name, asyh->state.active); + + if (check_lut) { + ret = nv50_head_atomic_check_lut(head, asyh); + if (ret) + return ret; + } + if (asyh->state.active) { for_each_new_connector_in_state(asyh->state.state, conn, conns, i) { if (conns->crtc == crtc) { @@ -361,14 +381,8 @@ nv50_head_atomic_check(struct drm_crtc *crtc, struct drm_atomic_state *state) if (asyh->state.mode_changed || asyh->state.connectors_changed) nv50_head_atomic_check_mode(head, asyh); - if (asyh->state.color_mgmt_changed || - memcmp(&armh->wndw, &asyh->wndw, sizeof(asyh->wndw))) { - int ret = nv50_head_atomic_check_lut(head, asyh); - if (ret) - return ret; - + if (check_lut) asyh->olut.visible = asyh->olut.handle != 0; - } if (asyc) { if (asyc->set.scaler) diff --git a/drivers/gpu/drm/nouveau/dispnv50/head.h b/drivers/gpu/drm/nouveau/dispnv50/head.h index 0bac6be9ba34d..41c8788dfb312 100644 --- a/drivers/gpu/drm/nouveau/dispnv50/head.h +++ b/drivers/gpu/drm/nouveau/dispnv50/head.h @@ -29,6 +29,7 @@ struct nv50_head_func { int (*view)(struct nv50_head *, struct nv50_head_atom *); int (*mode)(struct nv50_head *, struct nv50_head_atom *); bool (*olut)(struct nv50_head *, struct nv50_head_atom *, int); + bool (*ilut_check)(int size); bool olut_identity; int olut_size; int (*olut_set)(struct nv50_head *, struct nv50_head_atom *); @@ -71,6 +72,7 @@ extern const struct nv50_head_func head907d; int head907d_view(struct nv50_head *, struct nv50_head_atom *); int head907d_mode(struct nv50_head *, struct nv50_head_atom *); bool head907d_olut(struct nv50_head *, struct nv50_head_atom *, int); +bool head907d_ilut_check(int size); int head907d_olut_set(struct nv50_head *, struct nv50_head_atom *); int head907d_olut_clr(struct nv50_head *); int head907d_core_set(struct nv50_head *, struct nv50_head_atom *); diff --git a/drivers/gpu/drm/nouveau/dispnv50/head907d.c b/drivers/gpu/drm/nouveau/dispnv50/head907d.c index 85648d790743f..18fe4c1e2d6a6 100644 --- a/drivers/gpu/drm/nouveau/dispnv50/head907d.c +++ b/drivers/gpu/drm/nouveau/dispnv50/head907d.c @@ -314,6 +314,11 @@ head907d_olut(struct nv50_head *head, struct nv50_head_atom *asyh, int size) return true; } +bool head907d_ilut_check(int size) +{ + return size == 256 || size == 1024; +} + int head907d_mode(struct nv50_head *head, struct nv50_head_atom *asyh) { @@ -409,6 +414,7 @@ head907d = { .view = head907d_view, .mode = head907d_mode, .olut = head907d_olut, + .ilut_check = head907d_ilut_check, .olut_size = 1024, .olut_set = head907d_olut_set, .olut_clr = head907d_olut_clr, diff --git a/drivers/gpu/drm/nouveau/dispnv50/head917d.c b/drivers/gpu/drm/nouveau/dispnv50/head917d.c index ea9f8667305ec..4ce47b55f72c4 100644 --- a/drivers/gpu/drm/nouveau/dispnv50/head917d.c +++ b/drivers/gpu/drm/nouveau/dispnv50/head917d.c @@ -119,6 +119,7 @@ head917d = { .view = head907d_view, .mode = head907d_mode, .olut = head907d_olut, + .ilut_check = head907d_ilut_check, .olut_size = 1024, .olut_set = head907d_olut_set, .olut_clr = head907d_olut_clr, diff --git a/drivers/gpu/drm/nouveau/dispnv50/headc37d.c b/drivers/gpu/drm/nouveau/dispnv50/headc37d.c index 63adfeba50e58..a4a3b78ea42ca 100644 --- a/drivers/gpu/drm/nouveau/dispnv50/headc37d.c +++ b/drivers/gpu/drm/nouveau/dispnv50/headc37d.c @@ -285,6 +285,7 @@ headc37d = { .view = headc37d_view, .mode = headc37d_mode, .olut = headc37d_olut, + .ilut_check = head907d_ilut_check, .olut_size = 1024, .olut_set = headc37d_olut_set, .olut_clr = headc37d_olut_clr, diff --git a/drivers/gpu/drm/nouveau/dispnv50/headc57d.c b/drivers/gpu/drm/nouveau/dispnv50/headc57d.c index fd51527b56b83..fd624eb8a0bbc 100644 --- a/drivers/gpu/drm/nouveau/dispnv50/headc57d.c +++ b/drivers/gpu/drm/nouveau/dispnv50/headc57d.c @@ -236,6 +236,7 @@ headc57d = { .view = headc37d_view, .mode = headc57d_mode, .olut = headc57d_olut, + .ilut_check = head907d_ilut_check, .olut_identity = true, .olut_size = 1024, .olut_set = headc57d_olut_set, diff --git a/drivers/gpu/drm/nouveau/dispnv50/wndw.c b/drivers/gpu/drm/nouveau/dispnv50/wndw.c index 30712a681e2ae..133c8736426a9 100644 --- a/drivers/gpu/drm/nouveau/dispnv50/wndw.c +++ b/drivers/gpu/drm/nouveau/dispnv50/wndw.c @@ -403,10 +403,7 @@ nv50_wndw_atomic_check_lut(struct nv50_wndw *wndw, /* Recalculate LUT state. */ memset(&asyw->xlut, 0x00, sizeof(asyw->xlut)); if ((asyw->ilut = wndw->func->ilut ? ilut : NULL)) { - if (!wndw->func->ilut(wndw, asyw, drm_color_lut_size(ilut))) { - DRM_DEBUG_KMS("Invalid ilut\n"); - return -EINVAL; - } + wndw->func->ilut(wndw, asyw, drm_color_lut_size(ilut)); asyw->xlut.handle = wndw->wndw.vram.handle; asyw->xlut.i.buffer = !asyw->xlut.i.buffer; asyw->set.xlut = true; diff --git a/drivers/gpu/drm/nouveau/dispnv50/wndw.h b/drivers/gpu/drm/nouveau/dispnv50/wndw.h index f4e0c50800344..9c9f2c2a71a50 100644 --- a/drivers/gpu/drm/nouveau/dispnv50/wndw.h +++ b/drivers/gpu/drm/nouveau/dispnv50/wndw.h @@ -64,7 +64,7 @@ struct nv50_wndw_func { int (*ntfy_clr)(struct nv50_wndw *); int (*ntfy_wait_begun)(struct nouveau_bo *, u32 offset, struct nvif_device *); - bool (*ilut)(struct nv50_wndw *, struct nv50_wndw_atom *, int); + void (*ilut)(struct nv50_wndw *wndw, struct nv50_wndw_atom *asyh, int size); void (*csc)(struct nv50_wndw *, struct nv50_wndw_atom *, const struct drm_color_ctm *); int (*csc_set)(struct nv50_wndw *, struct nv50_wndw_atom *); @@ -129,7 +129,7 @@ int wndwc37e_update(struct nv50_wndw *, u32 *); int wndwc57e_new(struct nouveau_drm *, enum drm_plane_type, int, s32, struct nv50_wndw **); -bool wndwc57e_ilut(struct nv50_wndw *, struct nv50_wndw_atom *, int); +void wndwc57e_ilut(struct nv50_wndw *, struct nv50_wndw_atom *, int); int wndwc57e_ilut_set(struct nv50_wndw *, struct nv50_wndw_atom *); int wndwc57e_ilut_clr(struct nv50_wndw *); int wndwc57e_csc_set(struct nv50_wndw *, struct nv50_wndw_atom *); diff --git a/drivers/gpu/drm/nouveau/dispnv50/wndwc37e.c b/drivers/gpu/drm/nouveau/dispnv50/wndwc37e.c index 57df997c5ff38..183d2c0e65b69 100644 --- a/drivers/gpu/drm/nouveau/dispnv50/wndwc37e.c +++ b/drivers/gpu/drm/nouveau/dispnv50/wndwc37e.c @@ -82,18 +82,14 @@ wndwc37e_ilut_set(struct nv50_wndw *wndw, struct nv50_wndw_atom *asyw) return 0; } -static bool +static void wndwc37e_ilut(struct nv50_wndw *wndw, struct nv50_wndw_atom *asyw, int size) { - if (size != 256 && size != 1024) - return false; - asyw->xlut.i.size = size == 1024 ? NVC37E_SET_CONTROL_INPUT_LUT_SIZE_SIZE_1025 : NVC37E_SET_CONTROL_INPUT_LUT_SIZE_SIZE_257; asyw->xlut.i.range = NVC37E_SET_CONTROL_INPUT_LUT_RANGE_UNITY; asyw->xlut.i.output_mode = NVC37E_SET_CONTROL_INPUT_LUT_OUTPUT_MODE_INTERPOLATE; asyw->xlut.i.load = head907d_olut_load; - return true; } int diff --git a/drivers/gpu/drm/nouveau/dispnv50/wndwc57e.c b/drivers/gpu/drm/nouveau/dispnv50/wndwc57e.c index abdd3bb658b38..37f6da8b3f2a1 100644 --- a/drivers/gpu/drm/nouveau/dispnv50/wndwc57e.c +++ b/drivers/gpu/drm/nouveau/dispnv50/wndwc57e.c @@ -179,11 +179,11 @@ wndwc57e_ilut_load(struct drm_color_lut *in, int size, void __iomem *mem) writew(readw(mem - 4), mem + 4); } -bool +void wndwc57e_ilut(struct nv50_wndw *wndw, struct nv50_wndw_atom *asyw, int size) { - if (size = size ? size : 1024, size != 256 && size != 1024) - return false; + if (!size) + size = 1024; if (size == 256) asyw->xlut.i.mode = NVC57E_SET_ILUT_CONTROL_MODE_DIRECT8; @@ -193,7 +193,6 @@ wndwc57e_ilut(struct nv50_wndw *wndw, struct nv50_wndw_atom *asyw, int size) asyw->xlut.i.size = 4 /* VSS header. */ + size + 1 /* Entries. */; asyw->xlut.i.output_mode = NVC57E_SET_ILUT_CONTROL_INTERPOLATE_DISABLE; asyw->xlut.i.load = wndwc57e_ilut_load; - return true; } /**************************************************************** -- 2.30.2