[PATCH v5 06/20] drm/nouveau/kms: Search for encoders' connectors properly

Lyude Paul
2020-08-26T18:26:02Z

While the way we find the associated connector for an encoder is just
fine for legacy modesetting, it's not correct for nv50+ since that uses
atomic modesetting. For reference, see the drm_encoder kdocs.

Fix this by removing nouveau_encoder_connector_get(), and replacing it
with nv04_encoder_get_connector(), nv50_outp_get_old_connector(), and
nv50_outp_get_new_connector().

v2:
* Don't line-wrap for_each_(old|new)_connector_in_state in
nv50_outp_get_(old|new)_connector() - sravn
v3:
* Fix potential uninitialized usage of nv_connector (needs to be
initialized to NULL at the start). Thanks kernel test robot!
v4:
* Actually fix uninitialized nv_connector usage in
nv50_audio_component_get_eld(). The previous fix wouldn't have worked
since we would have started out with nv_connector == NULL, but
wouldn't clear it after a single drm_for_each_encoder() iteration.
Thanks again Kernel bot!

Signed-off-by: Lyude Paul <lyude@redhat.com>
Reviewed-by: Ben Skeggs <bskeggs@redhat.com>
---
drivers/gpu/drm/nouveau/dispnv04/dac.c | 2 +-
drivers/gpu/drm/nouveau/dispnv04/dfp.c | 7 +-
drivers/gpu/drm/nouveau/dispnv04/disp.c | 18 +++++
drivers/gpu/drm/nouveau/dispnv04/disp.h | 4 +
drivers/gpu/drm/nouveau/dispnv04/tvnv04.c | 2 +-
drivers/gpu/drm/nouveau/dispnv04/tvnv17.c | 2 +-
drivers/gpu/drm/nouveau/dispnv50/disp.c | 88 +++++++++++++++++----
drivers/gpu/drm/nouveau/nouveau_connector.c | 14 ----
drivers/gpu/drm/nouveau/nouveau_encoder.h | 6 +-
9 files changed, 105 insertions(+), 38 deletions(-)

diff --git a/drivers/gpu/drm/nouveau/dispnv04/dac.c b/drivers/gpu/drm/nouveau/dispnv04/dac.c
index ffdd447d87068..22d10f3285597 100644
--- a/drivers/gpu/drm/nouveau/dispnv04/dac.c
+++ b/drivers/gpu/drm/nouveau/dispnv04/dac.c
@@ -419,7 +419,7 @@ static void nv04_dac_commit(struct drm_encoder *encoder)
helper->dpms(encoder, DRM_MODE_DPMS_ON);

NV_DEBUG(drm, "Output %s is running on CRTC %d using output %c\n",
- nouveau_encoder_connector_get(nv_encoder)->base.name,
+ nv04_encoder_get_connector(nv_encoder)->base.name,
nv_crtc->index, '@' + ffs(nv_encoder->dcb->or));
}

diff --git a/drivers/gpu/drm/nouveau/dispnv04/dfp.c b/drivers/gpu/drm/nouveau/dispnv04/dfp.c
index f9f4482c79b54..42687ea2a4ca3 100644
--- a/drivers/gpu/drm/nouveau/dispnv04/dfp.c
+++ b/drivers/gpu/drm/nouveau/dispnv04/dfp.c
@@ -184,7 +184,8 @@ static bool nv04_dfp_mode_fixup(struct drm_encoder *encoder,
struct drm_display_mode *adjusted_mode)
{
struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
- struct nouveau_connector *nv_connector = nouveau_encoder_connector_get(nv_encoder);
+ struct nouveau_connector *nv_connector =
+ nv04_encoder_get_connector(nv_encoder);

if (!nv_connector->native_mode ||
nv_connector->scaling_mode == DRM_MODE_SCALE_NONE ||
@@ -478,7 +479,7 @@ static void nv04_dfp_commit(struct drm_encoder *encoder)
helper->dpms(encoder, DRM_MODE_DPMS_ON);

NV_DEBUG(drm, "Output %s is running on CRTC %d using output %c\n",
- nouveau_encoder_connector_get(nv_encoder)->base.name,
+ nv04_encoder_get_connector(nv_encoder)->base.name,
nv_crtc->index, '@' + ffs(nv_encoder->dcb->or));
}

@@ -591,7 +592,7 @@ static void nv04_dfp_restore(struct drm_encoder *encoder)

if (nv_encoder->dcb->type == DCB_OUTPUT_LVDS) {
struct nouveau_connector *connector =
- nouveau_encoder_connector_get(nv_encoder);
+ nv04_encoder_get_connector(nv_encoder);

if (connector && connector->native_mode)
call_lvds_script(dev, nv_encoder->dcb, head,
diff --git a/drivers/gpu/drm/nouveau/dispnv04/disp.c b/drivers/gpu/drm/nouveau/dispnv04/disp.c
index 900ab69df7e8f..3f046b917c85c 100644
--- a/drivers/gpu/drm/nouveau/dispnv04/disp.c
+++ b/drivers/gpu/drm/nouveau/dispnv04/disp.c
@@ -35,6 +35,24 @@

#include <nvif/if0004.h>

+struct nouveau_connector *
+nv04_encoder_get_connector(struct nouveau_encoder *encoder)
+{
+ struct drm_device *dev = to_drm_encoder(encoder)->dev;
+ struct drm_connector *connector;
+ struct drm_connector_list_iter conn_iter;
+ struct nouveau_connector *nv_connector = NULL;
+
+ drm_connector_list_iter_begin(dev, &conn_iter);
+ drm_for_each_connector_iter(connector, &conn_iter) {
+ if (connector->encoder == to_drm_encoder(encoder))
+ nv_connector = nouveau_connector(connector);
+ }
+ drm_connector_list_iter_end(&conn_iter);
+
+ return nv_connector;
+}
+
static void
nv04_display_fini(struct drm_device *dev, bool suspend)
{
diff --git a/drivers/gpu/drm/nouveau/dispnv04/disp.h b/drivers/gpu/drm/nouveau/dispnv04/disp.h
index 495d3284e8766..5ace5e906949a 100644
--- a/drivers/gpu/drm/nouveau/dispnv04/disp.h
+++ b/drivers/gpu/drm/nouveau/dispnv04/disp.h
@@ -6,6 +6,8 @@

#include "nouveau_display.h"

+struct nouveau_encoder;
+
enum nv04_fp_display_regs {
FP_DISPLAY_END,
FP_TOTAL,
@@ -93,6 +95,8 @@ nv04_display(struct drm_device *dev)

/* nv04_display.c */
int nv04_display_create(struct drm_device *);
+struct nouveau_connector *
+nv04_encoder_get_connector(struct nouveau_encoder *nv_encoder);

/* nv04_crtc.c */
int nv04_crtc_create(struct drm_device *, int index);
diff --git a/drivers/gpu/drm/nouveau/dispnv04/tvnv04.c b/drivers/gpu/drm/nouveau/dispnv04/tvnv04.c
index b701a4d8fe760..3ba7b59580d59 100644
--- a/drivers/gpu/drm/nouveau/dispnv04/tvnv04.c
+++ b/drivers/gpu/drm/nouveau/dispnv04/tvnv04.c
@@ -172,7 +172,7 @@ static void nv04_tv_commit(struct drm_encoder *encoder)
helper->dpms(encoder, DRM_MODE_DPMS_ON);

NV_DEBUG(drm, "Output %s is running on CRTC %d using output %c\n",
- nouveau_encoder_connector_get(nv_encoder)->base.name,
+ nv04_encoder_get_connector(nv_encoder)->base.name,
nv_crtc->index, '@' + ffs(nv_encoder->dcb->or));
}

diff --git a/drivers/gpu/drm/nouveau/dispnv04/tvnv17.c b/drivers/gpu/drm/nouveau/dispnv04/tvnv17.c
index 3a9489ed6544f..be28e7bd74903 100644
--- a/drivers/gpu/drm/nouveau/dispnv04/tvnv17.c
+++ b/drivers/gpu/drm/nouveau/dispnv04/tvnv17.c
@@ -599,7 +599,7 @@ static void nv17_tv_commit(struct drm_encoder *encoder)
helper->dpms(encoder, DRM_MODE_DPMS_ON);

NV_INFO(drm, "Output %s is running on CRTC %d using output %c\n",
- nouveau_encoder_connector_get(nv_encoder)->base.name,
+ nv04_encoder_get_connector(nv_encoder)->base.name,
nv_crtc->index, '@' + ffs(nv_encoder->dcb->or));
}

diff --git a/drivers/gpu/drm/nouveau/dispnv50/disp.c b/drivers/gpu/drm/nouveau/dispnv50/disp.c
index c4d138f0ca054..255a281249bc8 100644
--- a/drivers/gpu/drm/nouveau/dispnv50/disp.c
+++ b/drivers/gpu/drm/nouveau/dispnv50/disp.c
@@ -411,6 +411,40 @@ nv50_outp_atomic_check(struct drm_encoder *encoder,
return 0;
}

+struct nouveau_connector *
+nv50_outp_get_new_connector(struct nouveau_encoder *outp,
+ struct drm_atomic_state *state)
+{
+ struct drm_connector *connector;
+ struct drm_connector_state *connector_state;
+ struct drm_encoder *encoder = to_drm_encoder(outp);
+ int i;
+
+ for_each_new_connector_in_state(state, connector, connector_state, i) {
+ if (connector_state->best_encoder == encoder)
+ return nouveau_connector(connector);
+ }
+
+ return NULL;
+}
+
+struct nouveau_connector *
+nv50_outp_get_old_connector(struct nouveau_encoder *outp,
+ struct drm_atomic_state *state)
+{
+ struct drm_connector *connector;
+ struct drm_connector_state *connector_state;
+ struct drm_encoder *encoder = to_drm_encoder(outp);
+ int i;
+
+ for_each_old_connector_in_state(state, connector, connector_state, i) {
+ if (connector_state->best_encoder == encoder)
+ return nouveau_connector(connector);
+ }
+
+ return NULL;
+}
+
/******************************************************************************
* DAC
*****************************************************************************/
@@ -552,16 +586,31 @@ nv50_audio_component_get_eld(struct device *kdev, int port, int dev_id,
struct nouveau_drm *drm = nouveau_drm(drm_dev);
struct drm_encoder *encoder;
struct nouveau_encoder *nv_encoder;
- struct nouveau_connector *nv_connector;
+ struct drm_connector *connector;
struct nouveau_crtc *nv_crtc;
+ struct drm_connector_list_iter conn_iter;
int ret = 0;

*enabled = false;
+
drm_for_each_encoder(encoder, drm->dev) {
+ struct nouveau_connector *nv_connector = NULL;
+
nv_encoder = nouveau_encoder(encoder);
- nv_connector = nouveau_encoder_connector_get(nv_encoder);
+
+ drm_connector_list_iter_begin(drm_dev, &conn_iter);
+ drm_for_each_connector_iter(connector, &conn_iter) {
+ if (connector->state->best_encoder == encoder) {
+ nv_connector = nouveau_connector(connector);
+ break;
+ }
+ }
+ drm_connector_list_iter_end(&conn_iter);
+ if (!nv_connector)
+ continue;
+
nv_crtc = nouveau_crtc(encoder->crtc);
- if (!nv_connector || !nv_crtc || nv_encoder->or != port ||
+ if (!nv_crtc || nv_encoder->or != port ||
nv_crtc->index != dev_id)
continue;
*enabled = nv_encoder->audio;
@@ -572,6 +621,7 @@ nv50_audio_component_get_eld(struct device *kdev, int port, int dev_id,
}
break;
}
+
return ret;
}

@@ -665,7 +715,8 @@ nv50_audio_disable(struct drm_encoder *encoder, struct nouveau_crtc *nv_crtc)
}

static void
-nv50_audio_enable(struct drm_encoder *encoder, struct drm_display_mode *mode)
+nv50_audio_enable(struct drm_encoder *encoder, struct drm_atomic_state *state,
+ struct drm_display_mode *mode)
{
struct nouveau_drm *drm = nouveau_drm(encoder->dev);
struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
@@ -686,7 +737,7 @@ nv50_audio_enable(struct drm_encoder *encoder, struct drm_display_mode *mode)
(0x0100 << nv_crtc->index),
};

- nv_connector = nouveau_encoder_connector_get(nv_encoder);
+ nv_connector = nv50_outp_get_new_connector(nv_encoder, state);
if (!drm_detect_monitor_audio(nv_connector->edid))
return;

@@ -723,7 +774,8 @@ nv50_hdmi_disable(struct drm_encoder *encoder, struct nouveau_crtc *nv_crtc)
}

static void
-nv50_hdmi_enable(struct drm_encoder *encoder, struct drm_display_mode *mode)
+nv50_hdmi_enable(struct drm_encoder *encoder, struct drm_atomic_state *state,
+ struct drm_display_mode *mode)
{
struct nouveau_drm *drm = nouveau_drm(encoder->dev);
struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
@@ -752,7 +804,7 @@ nv50_hdmi_enable(struct drm_encoder *encoder, struct drm_display_mode *mode)
int ret;
int size;

- nv_connector = nouveau_encoder_connector_get(nv_encoder);
+ nv_connector = nv50_outp_get_new_connector(nv_encoder, state);
if (!drm_detect_hdmi_monitor(nv_connector->edid))
return;

@@ -798,7 +850,7 @@ nv50_hdmi_enable(struct drm_encoder *encoder, struct drm_display_mode *mode)
+ args.pwr.vendor_infoframe_length;
nvif_mthd(&disp->disp->object, 0, &args, size);

- nv50_audio_enable(encoder, mode);
+ nv50_audio_enable(encoder, state, mode);

/* If SCDC is supported by the downstream monitor, update
* divider / scrambling settings to what we programmed above.
@@ -1573,7 +1625,8 @@ nv50_sor_update(struct nouveau_encoder *nv_encoder, u8 head,
}

static void
-nv50_sor_disable(struct drm_encoder *encoder)
+nv50_sor_disable(struct drm_encoder *encoder,
+ struct drm_atomic_state *state)
{
struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
struct nouveau_crtc *nv_crtc = nouveau_crtc(nv_encoder->crtc);
@@ -1601,7 +1654,8 @@ nv50_sor_disable(struct drm_encoder *encoder)
}

static void
-nv50_sor_enable(struct drm_encoder *encoder)
+nv50_sor_enable(struct drm_encoder *encoder,
+ struct drm_atomic_state *state)
{
struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
struct nouveau_crtc *nv_crtc = nouveau_crtc(encoder->crtc);
@@ -1625,7 +1679,7 @@ nv50_sor_enable(struct drm_encoder *encoder)
u8 proto = NV507D_SOR_SET_CONTROL_PROTOCOL_CUSTOM;
u8 depth = NV837D_SOR_SET_CONTROL_PIXEL_DEPTH_DEFAULT;

- nv_connector = nouveau_encoder_connector_get(nv_encoder);
+ nv_connector = nv50_outp_get_new_connector(nv_encoder, state);
nv_encoder->crtc = encoder->crtc;

if ((disp->disp->object.oclass == GT214_DISP ||
@@ -1652,7 +1706,7 @@ nv50_sor_enable(struct drm_encoder *encoder)
proto = NV507D_SOR_SET_CONTROL_PROTOCOL_SINGLE_TMDS_B;
}

- nv50_hdmi_enable(&nv_encoder->base.base, mode);
+ nv50_hdmi_enable(&nv_encoder->base.base, state, mode);
break;
case DCB_OUTPUT_LVDS:
proto = NV507D_SOR_SET_CONTROL_PROTOCOL_LVDS_CUSTOM;
@@ -1693,7 +1747,7 @@ nv50_sor_enable(struct drm_encoder *encoder)
else
proto = NV887D_SOR_SET_CONTROL_PROTOCOL_DP_B;

- nv50_audio_enable(encoder, mode);
+ nv50_audio_enable(encoder, state, mode);
break;
default:
BUG();
@@ -1706,8 +1760,8 @@ nv50_sor_enable(struct drm_encoder *encoder)
static const struct drm_encoder_helper_funcs
nv50_sor_help = {
.atomic_check = nv50_outp_atomic_check,
- .enable = nv50_sor_enable,
- .disable = nv50_sor_disable,
+ .atomic_enable = nv50_sor_enable,
+ .atomic_disable = nv50_sor_disable,
};

static void
@@ -2066,7 +2120,7 @@ nv50_disp_atomic_commit_tail(struct drm_atomic_state *state)
outp->clr.mask, outp->set.mask);

if (outp->clr.mask) {
- help->disable(encoder);
+ help->atomic_disable(encoder, state);
interlock[NV50_DISP_INTERLOCK_CORE] |= 1;
if (outp->flush_disable) {
nv50_disp_atomic_commit_wndw(state, interlock);
@@ -2105,7 +2159,7 @@ nv50_disp_atomic_commit_tail(struct drm_atomic_state *state)
outp->set.mask, outp->clr.mask);

if (outp->set.mask) {
- help->enable(encoder);
+ help->atomic_enable(encoder, state);
interlock[NV50_DISP_INTERLOCK_CORE] = 1;
}

diff --git a/drivers/gpu/drm/nouveau/nouveau_connector.c b/drivers/gpu/drm/nouveau/nouveau_connector.c
index e12957e6faa7c..1d5696c39792a 100644
--- a/drivers/gpu/drm/nouveau/nouveau_connector.c
+++ b/drivers/gpu/drm/nouveau/nouveau_connector.c
@@ -391,20 +391,6 @@ find_encoder(struct drm_connector *connector, int type)
return NULL;
}

-struct nouveau_connector *
-nouveau_encoder_connector_get(struct nouveau_encoder *encoder)
-{
- struct drm_device *dev = to_drm_encoder(encoder)->dev;
- struct drm_connector *drm_connector;
-
- list_for_each_entry(drm_connector, &dev->mode_config.connector_list, head) {
- if (drm_connector->encoder == to_drm_encoder(encoder))
- return nouveau_connector(drm_connector);
- }
-
- return NULL;
-}
-
static void
nouveau_connector_destroy(struct drm_connector *connector)
{
diff --git a/drivers/gpu/drm/nouveau/nouveau_encoder.h b/drivers/gpu/drm/nouveau/nouveau_encoder.h
index 6424cdcb4913f..b0e1dad2367d6 100644
--- a/drivers/gpu/drm/nouveau/nouveau_encoder.h
+++ b/drivers/gpu/drm/nouveau/nouveau_encoder.h
@@ -113,7 +113,11 @@ enum drm_mode_status nv50_dp_mode_valid(struct drm_connector *,
unsigned *clock);

struct nouveau_connector *
-nouveau_encoder_connector_get(struct nouveau_encoder *encoder);
+nv50_outp_get_new_connector(struct nouveau_encoder *outp,
+ struct drm_atomic_state *state);
+struct nouveau_connector *
+nv50_outp_get_old_connector(struct nouveau_encoder *outp,
+ struct drm_atomic_state *state);

int nv50_mstm_detect(struct nv50_mstm *, u8 dpcd[8], int allow);
void nv50_mstm_remove(struct nv50_mstm *);
--
2.26.2