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Message-ID: <20230919220442.202488-9-lyude@redhat.com>
Date: Tue, 19 Sep 2023 17:56:03 -0400
From: Lyude Paul <lyude@...hat.com>
To: dri-devel@...ts.freedesktop.org, nouveau@...ts.freedesktop.org
Cc: Ben Skeggs <bskeggs@...hat.com>, Danilo Krummrich <me@...r.org>,
Karol Herbst <kherbst@...hat.com>,
David Airlie <airlied@...il.com>,
Daniel Vetter <daniel@...ll.ch>,
Kees Cook <keescook@...omium.org>,
"Gustavo A. R. Silva" <gustavoars@...nel.org>,
linux-kernel@...r.kernel.org (open list)
Subject: [PATCH v3 08/44] drm/nouveau/disp: add output method to fetch edid
From: Ben Skeggs <bskeggs@...hat.com>
- needed to support TMDS EDID on RM
Signed-off-by: Ben Skeggs <bskeggs@...hat.com>
Reviewed-by: Lyude Paul <lyude@...hat.com>
Acked-by: Danilo Krummrich <me@...r.org>
Signed-off-by: Lyude Paul <lyude@...hat.com>
---
drivers/gpu/drm/nouveau/include/nvif/if0012.h | 10 +++++++
drivers/gpu/drm/nouveau/include/nvif/outp.h | 1 +
drivers/gpu/drm/nouveau/nouveau_connector.c | 22 ++++++++------
drivers/gpu/drm/nouveau/nvif/outp.c | 30 +++++++++++++++++++
.../gpu/drm/nouveau/nvkm/engine/disp/outp.h | 1 +
.../gpu/drm/nouveau/nvkm/engine/disp/uoutp.c | 15 ++++++++++
6 files changed, 70 insertions(+), 9 deletions(-)
diff --git a/drivers/gpu/drm/nouveau/include/nvif/if0012.h b/drivers/gpu/drm/nouveau/include/nvif/if0012.h
index 923bc30af2a92..725d6e8e3d2d3 100644
--- a/drivers/gpu/drm/nouveau/include/nvif/if0012.h
+++ b/drivers/gpu/drm/nouveau/include/nvif/if0012.h
@@ -13,6 +13,7 @@ union nvif_outp_args {
};
#define NVIF_OUTP_V0_DETECT 0x00
+#define NVIF_OUTP_V0_EDID_GET 0x01
#define NVIF_OUTP_V0_ACQUIRE 0x11
#define NVIF_OUTP_V0_RELEASE 0x12
@@ -36,6 +37,15 @@ union nvif_outp_detect_args {
} v0;
};
+union nvif_outp_edid_get_args {
+ struct nvif_outp_edid_get_v0 {
+ __u8 version;
+ __u8 pad01;
+ __u16 size;
+ __u8 data[2048];
+ } v0;
+};
+
union nvif_outp_load_detect_args {
struct nvif_outp_load_detect_v0 {
__u8 version;
diff --git a/drivers/gpu/drm/nouveau/include/nvif/outp.h b/drivers/gpu/drm/nouveau/include/nvif/outp.h
index c3e1e4d2f1a11..7c2c34a84fbd8 100644
--- a/drivers/gpu/drm/nouveau/include/nvif/outp.h
+++ b/drivers/gpu/drm/nouveau/include/nvif/outp.h
@@ -25,6 +25,7 @@ enum nvif_outp_detect_status {
};
enum nvif_outp_detect_status nvif_outp_detect(struct nvif_outp *);
+int nvif_outp_edid_get(struct nvif_outp *, u8 **pedid);
int nvif_outp_load_detect(struct nvif_outp *, u32 loadval);
int nvif_outp_acquire_rgb_crt(struct nvif_outp *);
diff --git a/drivers/gpu/drm/nouveau/nouveau_connector.c b/drivers/gpu/drm/nouveau/nouveau_connector.c
index a290a2844547c..c079686fa2408 100644
--- a/drivers/gpu/drm/nouveau/nouveau_connector.c
+++ b/drivers/gpu/drm/nouveau/nouveau_connector.c
@@ -570,7 +570,6 @@ nouveau_connector_detect(struct drm_connector *connector, bool force)
struct nouveau_connector *nv_connector = nouveau_connector(connector);
struct nouveau_encoder *nv_encoder = NULL;
struct nouveau_encoder *nv_partner;
- struct i2c_adapter *i2c;
int type;
int ret;
enum drm_connector_status conn_status = connector_status_disconnected;
@@ -593,15 +592,20 @@ nouveau_connector_detect(struct drm_connector *connector, bool force)
}
nv_encoder = nouveau_connector_ddc_detect(connector);
- if (nv_encoder && (i2c = nv_encoder->i2c) != NULL) {
- struct edid *new_edid;
+ if (nv_encoder) {
+ struct edid *new_edid = NULL;
- if ((vga_switcheroo_handler_flags() &
- VGA_SWITCHEROO_CAN_SWITCH_DDC) &&
- nv_connector->type == DCB_CONNECTOR_LVDS)
- new_edid = drm_get_edid_switcheroo(connector, i2c);
- else
- new_edid = drm_get_edid(connector, i2c);
+ if (nv_encoder->i2c) {
+ if ((vga_switcheroo_handler_flags() & VGA_SWITCHEROO_CAN_SWITCH_DDC) &&
+ nv_connector->type == DCB_CONNECTOR_LVDS)
+ new_edid = drm_get_edid_switcheroo(connector, nv_encoder->i2c);
+ else
+ new_edid = drm_get_edid(connector, nv_encoder->i2c);
+ } else {
+ ret = nvif_outp_edid_get(&nv_encoder->outp, (u8 **)&new_edid);
+ if (ret < 0)
+ return connector_status_disconnected;
+ }
nouveau_connector_set_edid(nv_connector, new_edid);
if (!nv_connector->edid) {
diff --git a/drivers/gpu/drm/nouveau/nvif/outp.c b/drivers/gpu/drm/nouveau/nvif/outp.c
index 7f1daab35a0d2..10480142eea5a 100644
--- a/drivers/gpu/drm/nouveau/nvif/outp.c
+++ b/drivers/gpu/drm/nouveau/nvif/outp.c
@@ -210,6 +210,36 @@ nvif_outp_load_detect(struct nvif_outp *outp, u32 loadval)
return ret < 0 ? ret : args.load;
}
+int
+nvif_outp_edid_get(struct nvif_outp *outp, u8 **pedid)
+{
+ struct nvif_outp_edid_get_v0 *args;
+ int ret;
+
+ args = kmalloc(sizeof(*args), GFP_KERNEL);
+ if (!args)
+ return -ENOMEM;
+
+ args->version = 0;
+
+ ret = nvif_mthd(&outp->object, NVIF_OUTP_V0_EDID_GET, args, sizeof(*args));
+ NVIF_ERRON(ret, &outp->object, "[EDID_GET] size:%d", args->size);
+ if (ret)
+ goto done;
+
+ *pedid = kmalloc(args->size, GFP_KERNEL);
+ if (!*pedid) {
+ ret = -ENOMEM;
+ goto done;
+ }
+
+ memcpy(*pedid, args->data, args->size);
+ ret = args->size;
+done:
+ kfree(args);
+ return ret;
+}
+
enum nvif_outp_detect_status
nvif_outp_detect(struct nvif_outp *outp)
{
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/outp.h b/drivers/gpu/drm/nouveau/nvkm/engine/disp/outp.h
index 8c9fe878f3209..1cd70868f2255 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/disp/outp.h
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/outp.h
@@ -87,6 +87,7 @@ struct nvkm_outp_func {
void (*fini)(struct nvkm_outp *);
int (*detect)(struct nvkm_outp *);
+ int (*edid_get)(struct nvkm_outp *, u8 *data, u16 *size);
int (*acquire)(struct nvkm_outp *);
void (*release)(struct nvkm_outp *);
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/uoutp.c b/drivers/gpu/drm/nouveau/nvkm/engine/disp/uoutp.c
index 43752e216ce88..0c4ffa3ffb288 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/disp/uoutp.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/uoutp.c
@@ -275,6 +275,20 @@ nvkm_uoutp_mthd_load_detect(struct nvkm_outp *outp, void *argv, u32 argc)
return ret;
}
+static int
+nvkm_uoutp_mthd_edid_get(struct nvkm_outp *outp, void *argv, u32 argc)
+{
+ union nvif_outp_edid_get_args *args = argv;
+
+ if (argc != sizeof(args->v0) || args->v0.version != 0)
+ return -ENOSYS;
+ if (!outp->func->edid_get)
+ return -EINVAL;
+
+ args->v0.size = ARRAY_SIZE(args->v0.data);
+ return outp->func->edid_get(outp, args->v0.data, &args->v0.size);
+}
+
static int
nvkm_uoutp_mthd_detect(struct nvkm_outp *outp, void *argv, u32 argc)
{
@@ -319,6 +333,7 @@ nvkm_uoutp_mthd_noacquire(struct nvkm_outp *outp, u32 mthd, void *argv, u32 argc
{
switch (mthd) {
case NVIF_OUTP_V0_DETECT : return nvkm_uoutp_mthd_detect (outp, argv, argc);
+ case NVIF_OUTP_V0_EDID_GET : return nvkm_uoutp_mthd_edid_get (outp, argv, argc);
case NVIF_OUTP_V0_ACQUIRE : return nvkm_uoutp_mthd_acquire (outp, argv, argc);
case NVIF_OUTP_V0_LOAD_DETECT: return nvkm_uoutp_mthd_load_detect(outp, argv, argc);
case NVIF_OUTP_V0_DP_AUX_PWR : return nvkm_uoutp_mthd_dp_aux_pwr (outp, argv, argc);
--
2.41.0
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