search for: msto

From: Colin Ian King <colin.king at canonical.com> The null check on the array msto is incorrect since msto is never null. The null check should be instead on msto[i] since this is being dereferenced in the call to drm_mode_connector_attach_encoder. Thanks to Emil Velikov for pointing out the mistake in my original fix and for suggesting the correct fix. Detected by CoverityScan...

On 17/08/17 23:07, Ilia Mirkin wrote: > On Thu, Aug 17, 2017 at 6:03 PM, Colin King <colin.king at canonical.com> wrote: >> From: Colin Ian King <colin.king at canonical.com> >> >> The null check on the array msto is incorrect since msto is never >> null. The null check should be instead on msto[i] since this is >> being dereferenced in the call to drm_mode_connector_attach_encoder. >> >> Thanks to Emil Velikov for pointing out the mistake in my original >> fix and for suggestin...

On Thu, Aug 17, 2017 at 6:03 PM, Colin King <colin.king at canonical.com> wrote: > From: Colin Ian King <colin.king at canonical.com> > > The null check on the array msto is incorrect since msto is never > null. The null check should be instead on msto[i] since this is > being dereferenced in the call to drm_mode_connector_attach_encoder. > > Thanks to Emil Velikov for pointing out the mistake in my original > fix and for suggesting the correct fix. &...

...2017 08:16 AM, Colin Ian King wrote: > On 17/08/17 23:07, Ilia Mirkin wrote: >> On Thu, Aug 17, 2017 at 6:03 PM, Colin King <colin.king at canonical.com> wrote: >>> From: Colin Ian King <colin.king at canonical.com> >>> >>> The null check on the array msto is incorrect since msto is never >>> null. The null check should be instead on msto[i] since this is >>> being dereferenced in the call to drm_mode_connector_attach_encoder. >>> >>> Thanks to Emil Velikov for pointing out the mistake in my original >>> f...

From: Colin Ian King <colin.king at canonical.com> The check to see if mstm->msto is null is redundant because it is an array and hence can never be null. Remove the redundant check. Detected by CoverityScan, CID#1375915 ("Array compared against 0") Signed-off-by: Colin Ian King <colin.king at canonical.com> --- drivers/gpu/drm/nouveau/nv50_display.c | 2 +-...

...in order to retrieve the relevant payload and VCPI information that it needs to report to the GPU. This is wrong: mstc->port could be destroyed at any point, and additionally the payload could be changed at any point because it doesn't bother trying to grab the payload lock. So; remove nv50_msto_payload entirely and use the new drm_dp_get_payload_info() helper. Signed-off-by: Lyude Paul <lyude at redhat.com> --- drivers/gpu/drm/nouveau/dispnv50/disp.c | 55 ++++++++++--------------- 1 file changed, 21 insertions(+), 34 deletions(-) diff --git a/drivers/gpu/drm/nouveau/dispnv50/dis...

There is no need to look at the port's VCPI allocation before calling drm_dp_mst_deallocate_vcpi(), as we already have msto->disabled to let us avoid cleaning up an msto more then once. The DP MST core will never call drm_dp_mst_deallocate_vcpi() on it's own, which is presumably what these checks are meant to protect against. More importantly though, we're about to stop clearing mstc->port in the next com...

On the ThinkPad P71, we have one eDP connector exposed along with 5 DP connectors, resulting in a total of 11 TMDS encoders. Since the GPU on this system is also capable of MST, we create an additional 4 fake MST encoders for each DP port. Unfortunately, we also do this for the eDP port as well, resulting in: 1 eDP port: +1 TMDS encoder +4 DPMST encoders 5 DP ports: +2 TMDS

On 17 August 2017 at 11:37, Colin King <colin.king at canonical.com> wrote: > From: Colin Ian King <colin.king at canonical.com> > > The check to see if mstm->msto is null is redundant because it is > an array and hence can never be null. Remove the redundant check. > > Detected by CoverityScan, CID#1375915 ("Array compared against 0") > > Signed-off-by: Colin Ian King <colin.king at canonical.com> > --- > drivers/gpu/dr...

...file changed, 5 insertions(+), 13 deletions(-) diff --git a/drivers/gpu/drm/nouveau/dispnv50/disp.c b/drivers/gpu/drm/nouveau/dispnv50/disp.c index 982054bbcc8b..157d208d37b5 100644 --- a/drivers/gpu/drm/nouveau/dispnv50/disp.c +++ b/drivers/gpu/drm/nouveau/dispnv50/disp.c @@ -709,8 +709,7 @@ nv50_msto_cleanup(struct nv50_msto *msto) NV_ATOMIC(drm, "%s: msto cleanup\n", msto->encoder.name); - if (mstc->port) - drm_dp_mst_deallocate_vcpi(&mstm->mgr, mstc->port); + drm_dp_mst_deallocate_vcpi(&mstm->mgr, mstc->port); msto->mstc = NULL; msto->hea...

Going through the currently programmed payloads isn't safe without holding mgr->payload_lock, so actually do that and warn if anyone tries calling nv50_msto_payload() in the future without grabbing the right locks. Signed-off-by: Lyude Paul <lyude at redhat.com> --- drivers/gpu/drm/nouveau/dispnv50/disp.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/gpu/drm/nouveau/dispnv50/disp.c b/drivers/gpu/drm/nouveau/dispnv50/disp.c i...

So we don't ever have to worry about drivers touching drm_dp_mst_port structs without verifying them and crashing again. Lyude Paul (6): drm/dp_mst: Add drm_dp_get_payload_info() drm/nouveau: Use drm_dp_get_payload_info() for getting payload/vcpi drm/nouveau: Stop reading port->mgr in nv50_mstc_get_modes() drm/nouveau: Stop reading port->mgr in nv50_mstc_detect() drm/dp_mst:

...s->atomic_best_encoder is defined, > ->best_encoder is ignored both by the atomic modesetting helpers. That By both the atomic modesetting helpers and ... (usually "both" implies 2 things) > being said, this hook is completely broken anyway - it always returns > the first msto for a given mstc, despite the fact it might already be in > use. > > So, just get rid of it. We'll need this in a moment anyway, when we make > mstos per-head as opposed to per-connector. > > Signed-off-by: Lyude Paul <lyude at redhat.com> > --- > drivers/gpu/drm/...

nv50_msto_disable() does not call nv50_outp_release() to match nv50_outp_acquire() like other disable(). Add the missed call to fix it. Signed-off-by: Chuhong Yuan <hslester96 at gmail.com> --- drivers/gpu/drm/nouveau/dispnv50/disp.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --gi...

Hello Ben Skeggs, The patch f479c0ba4a17: "drm/nouveau/kms/nv50: initial support for DP 1.2 multi-stream" from Nov 4, 2016, leads to the following static checker warning: drivers/gpu/drm/nouveau/nv50_display.c:3158 nv50_mstc_new() warn: this array is probably non-NULL. 'mstm->msto' drivers/gpu/drm/nouveau/nv50_display.c 3155 mstc->connector.funcs->reset(&mstc->connector); 3156 nouveau_conn_attach_properties(&mstc->connector); 3157 3158 for (i = 0; i < ARRAY_SIZE(mstm->msto) && mstm->msto; i++)...

[sorry about the resend-copy pasted the wrong header and I want to make sure this doesn't get missed!] This patchset does some cleaning up of the atomic VCPI helpers for MST, and converts nouveau over to using them. I would have included amdgpu in this patch as well, but at the moment moving them over to the atomic helpers is nontrivial. Cc: Daniel Vetter <daniel at ffwll.ch> Lyude

This patchset does some cleaning up of the atomic VCPI helpers for MST, and converts nouveau over to using them. I would have included amdgpu in this patch as well, but at the moment moving them over to the atomic helpers is nontrivial. Cc: Daniel Vetter <daniel at ffwll.ch> Lyude Paul (5): drm/dp_mst: Add some atomic state iterator macros drm/dp_mst: Start tracking per-port VCPI

...0/disp.c @@ -881,22 +881,16 @@ nv50_mstc_atomic_best_encoder(struct drm_connector *connector, { struct nv50_head *head = nv50_head(connector_state->crtc); struct nv50_mstc *mstc = nv50_mstc(connector); - if (mstc->port) { - struct nv50_mstm *mstm = mstc->mstm; - return &mstm->msto[head->base.index]->encoder; - } - return NULL; + + return &mstc->mstm->msto[head->base.index]->encoder; } static struct drm_encoder * nv50_mstc_best_encoder(struct drm_connector *connector) { struct nv50_mstc *mstc = nv50_mstc(connector); - if (mstc->port) { - stru...

...0/disp.c @@ -881,22 +881,16 @@ nv50_mstc_atomic_best_encoder(struct drm_connector *connector, { struct nv50_head *head = nv50_head(connector_state->crtc); struct nv50_mstc *mstc = nv50_mstc(connector); - if (mstc->port) { - struct nv50_mstm *mstm = mstc->mstm; - return &mstm->msto[head->base.index]->encoder; - } - return NULL; + + return &mstc->mstm->msto[head->base.index]->encoder; } static struct drm_encoder * nv50_mstc_best_encoder(struct drm_connector *connector) { struct nv50_mstc *mstc = nv50_mstc(connector); - if (mstc->port) { - stru...

...0/disp.c @@ -843,22 +843,16 @@ nv50_mstc_atomic_best_encoder(struct drm_connector *connector, { struct nv50_head *head = nv50_head(connector_state->crtc); struct nv50_mstc *mstc = nv50_mstc(connector); - if (mstc->port) { - struct nv50_mstm *mstm = mstc->mstm; - return &mstm->msto[head->base.index]->encoder; - } - return NULL; + + return &mstc->mstm->msto[head->base.index]->encoder; } static struct drm_encoder * nv50_mstc_best_encoder(struct drm_connector *connector) { struct nv50_mstc *mstc = nv50_mstc(connector); - if (mstc->port) { - stru...