Now, this change and changes from patch 51 of this series is taken care as part of the below series https://patchwork.freedesktop.org/series/92750/ and merged. Thanks, Vandita > -----Original Message----- > From: Jani Nikula <jani.nikula@xxxxxxxxxxxxxxx> > Sent: Friday, July 2, 2021 1:50 PM > To: Roper, Matthew D <matthew.d.roper@xxxxxxxxx>; intel- > gfx@xxxxxxxxxxxxxxxxxxxxx > Cc: Patnana, Venkata Sai <venkata.sai.patnana@xxxxxxxxx>; Srivatsa, Anusha > <anusha.srivatsa@xxxxxxxxx>; dri-devel@xxxxxxxxxxxxxxxxxxxxx; Navare, > Manasi D <manasi.d.navare@xxxxxxxxx>; Kulkarni, Vandita > <vandita.kulkarni@xxxxxxxxx> > Subject: Re: [PATCH 50/53] drm/i915/display/dsc: Add Per connector debugfs > node for DSC BPP enable > > On Thu, 01 Jul 2021, Matt Roper <matthew.d.roper@xxxxxxxxx> wrote: > > From: Anusha Srivatsa <anusha.srivatsa@xxxxxxxxx> > > > > DSC can be supported per DP connector. This patch creates a per > > connector debugfs node to expose the Input and Compressed BPP. > > > > The same node can be used from userspace to force DSC to a certain > > BPP. > > > > force_dsc_bpp is written through this debugfs node to force DSC BPP to > > all accepted values > > I think this patch needs rework, and it's independent of the rest of the > series. Please just drop this one and the next. > > BR, > Jani. > > > > > Cc: Vandita Kulkarni <vandita.kulkarni@xxxxxxxxx> > > Cc: Manasi Navare <manasi.d.navare@xxxxxxxxx> > > Signed-off-by: Anusha Srivatsa <anusha.srivatsa@xxxxxxxxx> > > Signed-off-by: Patnana Venkata Sai <venkata.sai.patnana@xxxxxxxxx> > > Signed-off-by: Matt Roper <matthew.d.roper@xxxxxxxxx> > > --- > > .../drm/i915/display/intel_display_debugfs.c | 103 +++++++++++++++++- > > .../drm/i915/display/intel_display_types.h | 1 + > > 2 files changed, 103 insertions(+), 1 deletion(-) > > > > diff --git a/drivers/gpu/drm/i915/display/intel_display_debugfs.c > > b/drivers/gpu/drm/i915/display/intel_display_debugfs.c > > index af9e58619667..1805d70ea817 100644 > > --- a/drivers/gpu/drm/i915/display/intel_display_debugfs.c > > +++ b/drivers/gpu/drm/i915/display/intel_display_debugfs.c > > @@ -2389,6 +2389,100 @@ static const struct file_operations > i915_dsc_fec_support_fops = { > > .write = i915_dsc_fec_support_write > > }; > > > > +static int i915_dsc_bpp_support_show(struct seq_file *m, void *data) > > +{ > > + struct drm_connector *connector = m->private; > > + struct drm_device *dev = connector->dev; > > + struct drm_crtc *crtc; > > + struct intel_dp *intel_dp; > > + struct drm_modeset_acquire_ctx ctx; > > + struct intel_crtc_state *crtc_state = NULL; > > + int ret = 0; > > + bool try_again = false; > > + > > + drm_modeset_acquire_init(&ctx, > DRM_MODESET_ACQUIRE_INTERRUPTIBLE); > > + > > + do { > > + try_again = false; > > + ret = drm_modeset_lock(&dev- > >mode_config.connection_mutex, > > + &ctx); > > + if (ret) { > > + ret = -EINTR; > > + break; > > + } > > + crtc = connector->state->crtc; > > + if (connector->status != connector_status_connected || > !crtc) { > > + ret = -ENODEV; > > + break; > > + } > > + ret = drm_modeset_lock(&crtc->mutex, &ctx); > > + if (ret == -EDEADLK) { > > + ret = drm_modeset_backoff(&ctx); > > + if (!ret) { > > + try_again = true; > > + continue; > > + } > > + break; > > + } else if (ret) { > > + break; > > + } > > + intel_dp = > intel_attached_dp(to_intel_connector(connector)); > > + crtc_state = to_intel_crtc_state(crtc->state); > > + seq_printf(m, "Input_BPP: %d\n", crtc_state->pipe_bpp); > > + seq_printf(m, "Compressed_BPP: %d\n", > > + crtc_state->dsc.compressed_bpp); > > + } while (try_again); > > + > > + drm_modeset_drop_locks(&ctx); > > + drm_modeset_acquire_fini(&ctx); > > + > > + return ret; > > +} > > + > > +static ssize_t i915_dsc_bpp_support_write(struct file *file, > > + const char __user *ubuf, > > + size_t len, loff_t *offp) > > +{ > > + int dsc_bpp = 0; > > + int ret; > > + struct drm_connector *connector = > > + ((struct seq_file *)file->private_data)->private; > > + struct intel_encoder *encoder = > intel_attached_encoder(to_intel_connector(connector)); > > + struct drm_i915_private *i915 = to_i915(encoder->base.dev); > > + struct intel_dp *intel_dp = enc_to_intel_dp(encoder); > > + > > + if (len == 0) > > + return 0; > > + > > + drm_dbg(&i915->drm, > > + "Copied %zu bytes from user to force BPP\n", len); > > + > > + ret = kstrtoint_from_user(ubuf, len, 0, &dsc_bpp); > > + > > + intel_dp->force_dsc_bpp = dsc_bpp; > > + if (ret < 0) > > + return ret; > > + > > + *offp += len; > > + return len; > > +} > > + > > +static int i915_dsc_bpp_support_open(struct inode *inode, > > + struct file *file) > > +{ > > + return single_open(file, i915_dsc_bpp_support_show, > > + inode->i_private); > > +} > > + > > +static const struct file_operations i915_dsc_bpp_support_fops = { > > + .owner = THIS_MODULE, > > + .open = i915_dsc_bpp_support_open, > > + .read = seq_read, > > + .llseek = seq_lseek, > > + .release = single_release, > > + .write = i915_dsc_bpp_support_write > > +}; > > + > > /** > > * intel_connector_debugfs_add - add i915 specific connector debugfs files > > * @connector: pointer to a registered drm_connector @@ -2427,9 > > +2521,16 @@ int intel_connector_debugfs_add(struct drm_connector > *connector) > > connector, > &i915_hdcp_sink_capability_fops); > > } > > > > - if ((DISPLAY_VER(dev_priv) >= 11 || IS_CANNONLAKE(dev_priv)) && > ((connector->connector_type == DRM_MODE_CONNECTOR_DisplayPort && > !to_intel_connector(connector)->mst_port) || connector->connector_type > == DRM_MODE_CONNECTOR_eDP)) > > + if ((DISPLAY_VER(dev_priv) >= 11 || IS_CANNONLAKE(dev_priv)) && > > + ((connector->connector_type == > DRM_MODE_CONNECTOR_DisplayPort && > > + !to_intel_connector(connector)->mst_port) || > > + connector->connector_type == DRM_MODE_CONNECTOR_eDP)) > { > > debugfs_create_file("i915_dsc_fec_support", S_IRUGO, > root, > > connector, &i915_dsc_fec_support_fops); > > + debugfs_create_file("i915_dsc_bpp_support", 0444, > > + root, connector, > > + &i915_dsc_bpp_support_fops); > > + } > > > > /* Legacy panels doesn't lpsp on any platform */ > > if ((DISPLAY_VER(dev_priv) >= 9 || IS_HASWELL(dev_priv) || diff > > --git a/drivers/gpu/drm/i915/display/intel_display_types.h > > b/drivers/gpu/drm/i915/display/intel_display_types.h > > index 29ae1d9b5abc..00320d89d266 100644 > > --- a/drivers/gpu/drm/i915/display/intel_display_types.h > > +++ b/drivers/gpu/drm/i915/display/intel_display_types.h > > @@ -1627,6 +1627,7 @@ struct intel_dp { > > > > /* Display stream compression testing */ > > bool force_dsc_en; > > + int force_dsc_bpp; > > > > bool hobl_failed; > > bool hobl_active; > > -- > Jani Nikula, Intel Open Source Graphics Center
