[PATCH v4] drm/nouveau/kms/nv50-: Program notifier offset before requesting disp caps
From: Lyude Paul
Date: Tue Sep 01 2020 - 19:43:30 EST
Not entirely sure why this never came up when I originally tested this
(maybe some BIOSes already have this setup?) but the ->caps_init vfunc
appears to cause the display engine to throw an exception on driver
init, at least on my ThinkPad P72:
nouveau 0000:01:00.0: disp: chid 0 mthd 008c data 00000000 0000508c 0000102b
This is magic nvidia speak for "You need to have the DMA notifier offset
programmed before you can call NV507D_GET_CAPABILITIES." So, let's fix
this by doing that, and also perform an update afterwards to prevent
racing with the GPU when reading capabilities.
v2:
* Don't just program the DMA notifier offset, make sure to actually
perform an update
v3:
* Don't call UPDATE()
* Actually read the correct notifier fields, as apparently the
CAPABILITIES_DONE field lives in a different location than the main
NV_DISP_CORE_NOTIFIER_1 field. As well, 907d+ use a different
CAPABILITIES_DONE field then pre-907d cards.
v4:
* Don't forget to check the return value of core507d_read_caps()
Signed-off-by: Lyude Paul <lyude@xxxxxxxxxx>
Fixes: 4a2cb4181b07 ("drm/nouveau/kms/nv50-: Probe SOR and PIOR caps for DP interlacing support")
Cc: <stable@xxxxxxxxxxxxxxx> # v5.8+
---
drivers/gpu/drm/nouveau/dispnv50/core.h | 2 +
drivers/gpu/drm/nouveau/dispnv50/core507d.c | 37 ++++++++++++++++++-
drivers/gpu/drm/nouveau/dispnv50/core907d.c | 36 +++++++++++++++++-
drivers/gpu/drm/nouveau/dispnv50/core917d.c | 2 +-
drivers/gpu/drm/nouveau/dispnv50/disp.h | 2 +
.../drm/nouveau/include/nvhw/class/cl507d.h | 5 ++-
.../drm/nouveau/include/nvhw/class/cl907d.h | 4 ++
7 files changed, 83 insertions(+), 5 deletions(-)
diff --git a/drivers/gpu/drm/nouveau/dispnv50/core.h b/drivers/gpu/drm/nouveau/dispnv50/core.h
index 498622c0c670d..b789139e5fff6 100644
--- a/drivers/gpu/drm/nouveau/dispnv50/core.h
+++ b/drivers/gpu/drm/nouveau/dispnv50/core.h
@@ -44,6 +44,7 @@ int core507d_new_(const struct nv50_core_func *, struct nouveau_drm *, s32,
struct nv50_core **);
int core507d_init(struct nv50_core *);
void core507d_ntfy_init(struct nouveau_bo *, u32);
+int core507d_read_caps(struct nv50_disp *disp, u32 offset);
int core507d_caps_init(struct nouveau_drm *, struct nv50_disp *);
int core507d_ntfy_wait_done(struct nouveau_bo *, u32, struct nvif_device *);
int core507d_update(struct nv50_core *, u32 *, bool);
@@ -55,6 +56,7 @@ extern const struct nv50_outp_func pior507d;
int core827d_new(struct nouveau_drm *, s32, struct nv50_core **);
int core907d_new(struct nouveau_drm *, s32, struct nv50_core **);
+int core907d_caps_init(struct nouveau_drm *drm, struct nv50_disp *disp);
extern const struct nv50_outp_func dac907d;
extern const struct nv50_outp_func sor907d;
diff --git a/drivers/gpu/drm/nouveau/dispnv50/core507d.c b/drivers/gpu/drm/nouveau/dispnv50/core507d.c
index ad1f09a143aa4..d0f2b80a32103 100644
--- a/drivers/gpu/drm/nouveau/dispnv50/core507d.c
+++ b/drivers/gpu/drm/nouveau/dispnv50/core507d.c
@@ -75,18 +75,51 @@ core507d_ntfy_init(struct nouveau_bo *bo, u32 offset)
}
int
-core507d_caps_init(struct nouveau_drm *drm, struct nv50_disp *disp)
+core507d_read_caps(struct nv50_disp *disp, u32 offset)
{
struct nvif_push *push = disp->core->chan.push;
int ret;
- if ((ret = PUSH_WAIT(push, 2)))
+ ret = PUSH_WAIT(push, 4);
+ if (ret)
return ret;
+ PUSH_MTHD(push, NV507D, SET_NOTIFIER_CONTROL,
+ NVDEF(NV507D, SET_NOTIFIER_CONTROL, MODE, WRITE) |
+ NVVAL(NV507D, SET_NOTIFIER_CONTROL, OFFSET, offset >> 2) |
+ NVDEF(NV507D, SET_NOTIFIER_CONTROL, NOTIFY, ENABLE));
PUSH_MTHD(push, NV507D, GET_CAPABILITIES, 0x00000000);
+
return PUSH_KICK(push);
}
+int
+core507d_caps_init(struct nouveau_drm *drm, struct nv50_disp *disp)
+{
+ struct nv50_core *core = disp->core;
+ struct nouveau_bo *bo = disp->sync;
+ s64 time;
+ int ret;
+
+ NVBO_WR32(bo, NV50_DISP_CAPS_NTFY1, NV_DISP_CORE_NOTIFIER_1, CAPABILITIES_1,
+ NVDEF(NV_DISP_CORE_NOTIFIER_1, CAPABILITIES_1, DONE, FALSE));
+
+ ret = core507d_read_caps(disp, NV50_DISP_CAPS_NTFY1);
+ if (ret < 0)
+ return ret;
+
+ time = nvif_msec(core->chan.base.device, 2000ULL,
+ if (NVBO_TD32(bo, NV50_DISP_CAPS_NTFY1,
+ NV_DISP_CORE_NOTIFIER_1, CAPABILITIES_1, DONE, ==, TRUE))
+ break;
+ usleep_range(1, 2);
+ );
+ if (time < 0)
+ NV_ERROR(drm, "core caps notifier timeout\n");
+
+ return 0;
+}
+
int
core507d_init(struct nv50_core *core)
{
diff --git a/drivers/gpu/drm/nouveau/dispnv50/core907d.c b/drivers/gpu/drm/nouveau/dispnv50/core907d.c
index b17c03529c784..45505a18aca17 100644
--- a/drivers/gpu/drm/nouveau/dispnv50/core907d.c
+++ b/drivers/gpu/drm/nouveau/dispnv50/core907d.c
@@ -22,11 +22,45 @@
#include "core.h"
#include "head.h"
+#include <nvif/push507c.h>
+#include <nvif/timer.h>
+
+#include <nvhw/class/cl907d.h>
+
+#include "nouveau_bo.h"
+
+int
+core907d_caps_init(struct nouveau_drm *drm, struct nv50_disp *disp)
+{
+ struct nv50_core *core = disp->core;
+ struct nouveau_bo *bo = disp->sync;
+ s64 time;
+ int ret;
+
+ NVBO_WR32(bo, NV50_DISP_CAPS_NTFY4, NV907D_CORE_NOTIFIER_3, CAPABILITIES_4,
+ NVDEF(NV907D_CORE_NOTIFIER_3, CAPABILITIES_4, DONE, FALSE));
+
+ ret = core507d_read_caps(disp, NV50_DISP_CAPS_NTFY4);
+ if (ret < 0)
+ return ret;
+
+ time = nvif_msec(core->chan.base.device, 2000ULL,
+ if (NVBO_TD32(bo, NV50_DISP_CAPS_NTFY4,
+ NV907D_CORE_NOTIFIER_3, CAPABILITIES_4, DONE, ==, TRUE))
+ break;
+ usleep_range(1, 2);
+ );
+ if (time < 0)
+ NV_ERROR(drm, "core caps notifier timeout\n");
+
+ return 0;
+}
+
static const struct nv50_core_func
core907d = {
.init = core507d_init,
.ntfy_init = core507d_ntfy_init,
- .caps_init = core507d_caps_init,
+ .caps_init = core907d_caps_init,
.ntfy_wait_done = core507d_ntfy_wait_done,
.update = core507d_update,
.head = &head907d,
diff --git a/drivers/gpu/drm/nouveau/dispnv50/core917d.c b/drivers/gpu/drm/nouveau/dispnv50/core917d.c
index 66846f3720805..1cd3a2a35dfb7 100644
--- a/drivers/gpu/drm/nouveau/dispnv50/core917d.c
+++ b/drivers/gpu/drm/nouveau/dispnv50/core917d.c
@@ -26,7 +26,7 @@ static const struct nv50_core_func
core917d = {
.init = core507d_init,
.ntfy_init = core507d_ntfy_init,
- .caps_init = core507d_caps_init,
+ .caps_init = core907d_caps_init,
.ntfy_wait_done = core507d_ntfy_wait_done,
.update = core507d_update,
.head = &head917d,
diff --git a/drivers/gpu/drm/nouveau/dispnv50/disp.h b/drivers/gpu/drm/nouveau/dispnv50/disp.h
index 92bddc0836171..a59051bd070d7 100644
--- a/drivers/gpu/drm/nouveau/dispnv50/disp.h
+++ b/drivers/gpu/drm/nouveau/dispnv50/disp.h
@@ -16,6 +16,8 @@ struct nv50_disp {
#define NV50_DISP_SYNC(c, o) ((c) * 0x040 + (o))
#define NV50_DISP_CORE_NTFY NV50_DISP_SYNC(0 , 0x00)
+#define NV50_DISP_CAPS_NTFY1 NV50_DISP_SYNC(0 , 0x01)
+#define NV50_DISP_CAPS_NTFY4 NV50_DISP_SYNC(0 , 0x04)
#define NV50_DISP_WNDW_SEM0(c) NV50_DISP_SYNC(1 + (c), 0x00)
#define NV50_DISP_WNDW_SEM1(c) NV50_DISP_SYNC(1 + (c), 0x10)
#define NV50_DISP_WNDW_NTFY(c) NV50_DISP_SYNC(1 + (c), 0x20)
diff --git a/drivers/gpu/drm/nouveau/include/nvhw/class/cl507d.h b/drivers/gpu/drm/nouveau/include/nvhw/class/cl507d.h
index 2e444bac701dd..6a463f308b64f 100644
--- a/drivers/gpu/drm/nouveau/include/nvhw/class/cl507d.h
+++ b/drivers/gpu/drm/nouveau/include/nvhw/class/cl507d.h
@@ -32,7 +32,10 @@
#define NV_DISP_CORE_NOTIFIER_1_COMPLETION_0_DONE_TRUE 0x00000001
#define NV_DISP_CORE_NOTIFIER_1_COMPLETION_0_R0 15:1
#define NV_DISP_CORE_NOTIFIER_1_COMPLETION_0_TIMESTAMP 29:16
-
+#define NV_DISP_CORE_NOTIFIER_1_CAPABILITIES_1 0x00000001
+#define NV_DISP_CORE_NOTIFIER_1_CAPABILITIES_1_DONE 0:0
+#define NV_DISP_CORE_NOTIFIER_1_CAPABILITIES_1_DONE_FALSE 0x00000000
+#define NV_DISP_CORE_NOTIFIER_1_CAPABILITIES_1_DONE_TRUE 0x00000001
// class methods
#define NV507D_UPDATE (0x00000080)
diff --git a/drivers/gpu/drm/nouveau/include/nvhw/class/cl907d.h b/drivers/gpu/drm/nouveau/include/nvhw/class/cl907d.h
index 34bc3eafac7d1..79aff6ff31385 100644
--- a/drivers/gpu/drm/nouveau/include/nvhw/class/cl907d.h
+++ b/drivers/gpu/drm/nouveau/include/nvhw/class/cl907d.h
@@ -24,6 +24,10 @@
#ifndef _cl907d_h_
#define _cl907d_h_
+#define NV907D_CORE_NOTIFIER_3_CAPABILITIES_4 0x00000004
+#define NV907D_CORE_NOTIFIER_3_CAPABILITIES_4_DONE 0:0
+#define NV907D_CORE_NOTIFIER_3_CAPABILITIES_4_DONE_FALSE 0x00000000
+#define NV907D_CORE_NOTIFIER_3_CAPABILITIES_4_DONE_TRUE 0x00000001
#define NV907D_CORE_NOTIFIER_3_CAPABILITIES_CAP_SOR0_20 0x00000014
#define NV907D_CORE_NOTIFIER_3_CAPABILITIES_CAP_SOR0_20_SINGLE_LVDS18 0:0
#define NV907D_CORE_NOTIFIER_3_CAPABILITIES_CAP_SOR0_20_SINGLE_LVDS18_FALSE 0x00000000
--
2.26.2