Re: [Intel-gfx] [PATCH v6 27/28] drm/i915/dsc: Add Per connector debugfs node for DSC support/enable
On Mon, Oct 29, 2018 at 02:35:36PM -0700, Manasi Navare wrote:
> On Mon, Oct 29, 2018 at 10:39:21PM +0200, Ville Syrjälä wrote:
> > On Wed, Oct 24, 2018 at 03:28:39PM -0700, Manasi Navare wrote:
> > > DSC can be supported per DP connector. This patch adds a per connector
> > > debugfs node to expose DSC support capability by the kernel.
> > > The same node can be used from userspace to force DSC enable.
> >
> > Why is the force_dsc thing split between two patches so strangely?
>
> This patch just defines the force_dsc and sets it through the debugfs
> node. But how it configures DSC during atomic check is moved to a
> separate patch.
> Would you prefer having that integrated with this patch itself?
Either that or split it in into "read only debugfs status" +
"add dsc_force" patches.
>
> Manasi
>
> >
> > >
> > > v2:
> > > * Use kstrtobool_from_user to avoid explicit error checking (Lyude)
> > > * Rebase on drm-tip (Manasi)
> > >
> > > Cc: Rodrigo Vivi
> > > Cc: Ville Syrjala
> > > Cc: Anusha Srivatsa
> > > Cc: Lyude Paul
> > > Signed-off-by: Manasi Navare
> > > Reviewed-by: Lyude Paul
> > > ---
> > > drivers/gpu/drm/i915/i915_debugfs.c | 71 -
> > > drivers/gpu/drm/i915/intel_dp.c | 1 +
> > > drivers/gpu/drm/i915/intel_drv.h| 3 ++
> > > 3 files changed, 74 insertions(+), 1 deletion(-)
> > >
> > > diff --git a/drivers/gpu/drm/i915/i915_debugfs.c
> > > b/drivers/gpu/drm/i915/i915_debugfs.c
> > > index 5cadfcd03ea9..6e631f08dd4b 100644
> > > --- a/drivers/gpu/drm/i915/i915_debugfs.c
> > > +++ b/drivers/gpu/drm/i915/i915_debugfs.c
> > > @@ -4999,6 +4999,72 @@ static int i915_hdcp_sink_capability_show(struct
> > > seq_file *m, void *data)
> > > }
> > > DEFINE_SHOW_ATTRIBUTE(i915_hdcp_sink_capability);
> > >
> > > +static int i915_dsc_support_show(struct seq_file *m, void *data)
> > > +{
> > > + struct drm_connector *connector = m->private;
> > > + struct intel_encoder *encoder = intel_attached_encoder(connector);
> > > + struct intel_dp *intel_dp =
> > > + enc_to_intel_dp(>base);
> > > + struct intel_crtc *crtc;
> > > + struct intel_crtc_state *crtc_state;
> > > +
> > > + crtc = to_intel_crtc(encoder->base.crtc);
> > > + crtc_state = to_intel_crtc_state(crtc->base.state);
> > > + drm_modeset_lock(>base.mutex, NULL);
> > > + seq_printf(m, "Enabled: %s\n",
> > > +yesno(crtc_state->dsc_params.compression_enable));
> > > + seq_printf(m, "Supported: %s\n",
> > > +yesno(drm_dp_sink_supports_dsc(intel_dp->dsc_dpcd)));
> > > + drm_modeset_unlock(>base.mutex);
> > > +
> > > + return 0;
> > > +}
> > > +
> > > +static ssize_t i915_dsc_support_write(struct file *file,
> > > + const char __user *ubuf,
> > > + size_t len, loff_t *offp)
> > > +{
> > > + bool dsc_enable = false;
> > > + int ret;
> > > + struct drm_connector *connector =
> > > + ((struct seq_file *)file->private_data)->private;
> > > + struct intel_encoder *encoder = intel_attached_encoder(connector);
> > > + struct intel_dp *intel_dp = enc_to_intel_dp(>base);
> > > +
> > > + if (len == 0)
> > > + return 0;
> > > +
> > > + DRM_DEBUG_DRIVER("Copied %d bytes from user to force DSC\n",
> > > + (unsigned int)len);
> > > +
> > > + ret = kstrtobool_from_user(ubuf, len, _enable);
> > > + if (ret < 0)
> > > + return ret;
> > > +
> > > + DRM_DEBUG_DRIVER("Got %s for DSC Enable\n",
> > > + (dsc_enable) ? "true" : "false");
> > > + intel_dp->force_dsc_en = dsc_enable;
> > > +
> > > + *offp += len;
> > > + return len;
> > > +}
> > > +
> > > +static int i915_dsc_support_open(struct inode *inode,
> > > + struct file *file)
> > > +{
> > > + return single_open(file, i915_dsc_support_show,
> > > +inode->i_private);
> > > +}
> > > +
> > > +static const struct file_operations i915_dsc_support_fops = {
> > > + .owner = THIS_MODULE,
> > > + .open = i915_dsc_support_open,
> > > + .read = seq_read,
> > > + .llseek = seq_lseek,
> > > + .release = single_release,
> > > + .write = i915_dsc_support_write
> > > +};
> > > +
> > > /**
> > > * i915_debugfs_connector_add - add i915 specific connector debugfs files
> > > * @connector: pointer to a registered drm_connector
> > > @@ -5017,9 +5083,12 @@ int i915_debugfs_connector_add(struct
> > > drm_connector *connector)
> > > return -ENODEV;
> > >
> > > if (connector->connector_type == DRM_MODE_CONNECTOR_DisplayPort ||
> > > - connector->connector_type == DRM_MODE_CONNECTOR_eDP)
> > > + connector->connector_type == DRM_MODE_CONNECTOR_eDP) {
> > > debugfs_create_file("i915_dpcd", S_IRUGO, root,
> > > connector, _dpcd_fops);
> > > + debugfs_create_file("i915_dsc_support", S_IRUGO, root,
> > > + connector, _dsc_support_fops);
> > > + }
> > >
> > > if (connector->connector_type ==
Re: [Intel-gfx] [PATCH v6 27/28] drm/i915/dsc: Add Per connector debugfs node for DSC support/enable
On Mon, Oct 29, 2018 at 10:39:21PM +0200, Ville Syrjälä wrote:
> On Wed, Oct 24, 2018 at 03:28:39PM -0700, Manasi Navare wrote:
> > DSC can be supported per DP connector. This patch adds a per connector
> > debugfs node to expose DSC support capability by the kernel.
> > The same node can be used from userspace to force DSC enable.
>
> Why is the force_dsc thing split between two patches so strangely?
This patch just defines the force_dsc and sets it through the debugfs
node. But how it configures DSC during atomic check is moved to a
separate patch.
Would you prefer having that integrated with this patch itself?
Manasi
>
> >
> > v2:
> > * Use kstrtobool_from_user to avoid explicit error checking (Lyude)
> > * Rebase on drm-tip (Manasi)
> >
> > Cc: Rodrigo Vivi
> > Cc: Ville Syrjala
> > Cc: Anusha Srivatsa
> > Cc: Lyude Paul
> > Signed-off-by: Manasi Navare
> > Reviewed-by: Lyude Paul
> > ---
> > drivers/gpu/drm/i915/i915_debugfs.c | 71 -
> > drivers/gpu/drm/i915/intel_dp.c | 1 +
> > drivers/gpu/drm/i915/intel_drv.h| 3 ++
> > 3 files changed, 74 insertions(+), 1 deletion(-)
> >
> > diff --git a/drivers/gpu/drm/i915/i915_debugfs.c
> > b/drivers/gpu/drm/i915/i915_debugfs.c
> > index 5cadfcd03ea9..6e631f08dd4b 100644
> > --- a/drivers/gpu/drm/i915/i915_debugfs.c
> > +++ b/drivers/gpu/drm/i915/i915_debugfs.c
> > @@ -4999,6 +4999,72 @@ static int i915_hdcp_sink_capability_show(struct
> > seq_file *m, void *data)
> > }
> > DEFINE_SHOW_ATTRIBUTE(i915_hdcp_sink_capability);
> >
> > +static int i915_dsc_support_show(struct seq_file *m, void *data)
> > +{
> > + struct drm_connector *connector = m->private;
> > + struct intel_encoder *encoder = intel_attached_encoder(connector);
> > + struct intel_dp *intel_dp =
> > + enc_to_intel_dp(>base);
> > + struct intel_crtc *crtc;
> > + struct intel_crtc_state *crtc_state;
> > +
> > + crtc = to_intel_crtc(encoder->base.crtc);
> > + crtc_state = to_intel_crtc_state(crtc->base.state);
> > + drm_modeset_lock(>base.mutex, NULL);
> > + seq_printf(m, "Enabled: %s\n",
> > + yesno(crtc_state->dsc_params.compression_enable));
> > + seq_printf(m, "Supported: %s\n",
> > + yesno(drm_dp_sink_supports_dsc(intel_dp->dsc_dpcd)));
> > + drm_modeset_unlock(>base.mutex);
> > +
> > + return 0;
> > +}
> > +
> > +static ssize_t i915_dsc_support_write(struct file *file,
> > + const char __user *ubuf,
> > + size_t len, loff_t *offp)
> > +{
> > + bool dsc_enable = false;
> > + int ret;
> > + struct drm_connector *connector =
> > + ((struct seq_file *)file->private_data)->private;
> > + struct intel_encoder *encoder = intel_attached_encoder(connector);
> > + struct intel_dp *intel_dp = enc_to_intel_dp(>base);
> > +
> > + if (len == 0)
> > + return 0;
> > +
> > + DRM_DEBUG_DRIVER("Copied %d bytes from user to force DSC\n",
> > +(unsigned int)len);
> > +
> > + ret = kstrtobool_from_user(ubuf, len, _enable);
> > + if (ret < 0)
> > + return ret;
> > +
> > + DRM_DEBUG_DRIVER("Got %s for DSC Enable\n",
> > +(dsc_enable) ? "true" : "false");
> > + intel_dp->force_dsc_en = dsc_enable;
> > +
> > + *offp += len;
> > + return len;
> > +}
> > +
> > +static int i915_dsc_support_open(struct inode *inode,
> > +struct file *file)
> > +{
> > + return single_open(file, i915_dsc_support_show,
> > + inode->i_private);
> > +}
> > +
> > +static const struct file_operations i915_dsc_support_fops = {
> > + .owner = THIS_MODULE,
> > + .open = i915_dsc_support_open,
> > + .read = seq_read,
> > + .llseek = seq_lseek,
> > + .release = single_release,
> > + .write = i915_dsc_support_write
> > +};
> > +
> > /**
> > * i915_debugfs_connector_add - add i915 specific connector debugfs files
> > * @connector: pointer to a registered drm_connector
> > @@ -5017,9 +5083,12 @@ int i915_debugfs_connector_add(struct drm_connector
> > *connector)
> > return -ENODEV;
> >
> > if (connector->connector_type == DRM_MODE_CONNECTOR_DisplayPort ||
> > - connector->connector_type == DRM_MODE_CONNECTOR_eDP)
> > + connector->connector_type == DRM_MODE_CONNECTOR_eDP) {
> > debugfs_create_file("i915_dpcd", S_IRUGO, root,
> > connector, _dpcd_fops);
> > + debugfs_create_file("i915_dsc_support", S_IRUGO, root,
> > + connector, _dsc_support_fops);
> > + }
> >
> > if (connector->connector_type == DRM_MODE_CONNECTOR_eDP) {
> > debugfs_create_file("i915_panel_timings", S_IRUGO, root,
> > diff --git a/drivers/gpu/drm/i915/intel_dp.c
> > b/drivers/gpu/drm/i915/intel_dp.c
> > index 72e6605f0ed7..0b5939992c2b 100644
> > --- a/drivers/gpu/drm/i915/intel_dp.c
> > +++
Re: [Intel-gfx] [PATCH v6 27/28] drm/i915/dsc: Add Per connector debugfs node for DSC support/enable
On Wed, Oct 24, 2018 at 03:28:39PM -0700, Manasi Navare wrote:
> DSC can be supported per DP connector. This patch adds a per connector
> debugfs node to expose DSC support capability by the kernel.
> The same node can be used from userspace to force DSC enable.
Why is the force_dsc thing split between two patches so strangely?
>
> v2:
> * Use kstrtobool_from_user to avoid explicit error checking (Lyude)
> * Rebase on drm-tip (Manasi)
>
> Cc: Rodrigo Vivi
> Cc: Ville Syrjala
> Cc: Anusha Srivatsa
> Cc: Lyude Paul
> Signed-off-by: Manasi Navare
> Reviewed-by: Lyude Paul
> ---
> drivers/gpu/drm/i915/i915_debugfs.c | 71 -
> drivers/gpu/drm/i915/intel_dp.c | 1 +
> drivers/gpu/drm/i915/intel_drv.h| 3 ++
> 3 files changed, 74 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/i915/i915_debugfs.c
> b/drivers/gpu/drm/i915/i915_debugfs.c
> index 5cadfcd03ea9..6e631f08dd4b 100644
> --- a/drivers/gpu/drm/i915/i915_debugfs.c
> +++ b/drivers/gpu/drm/i915/i915_debugfs.c
> @@ -4999,6 +4999,72 @@ static int i915_hdcp_sink_capability_show(struct
> seq_file *m, void *data)
> }
> DEFINE_SHOW_ATTRIBUTE(i915_hdcp_sink_capability);
>
> +static int i915_dsc_support_show(struct seq_file *m, void *data)
> +{
> + struct drm_connector *connector = m->private;
> + struct intel_encoder *encoder = intel_attached_encoder(connector);
> + struct intel_dp *intel_dp =
> + enc_to_intel_dp(>base);
> + struct intel_crtc *crtc;
> + struct intel_crtc_state *crtc_state;
> +
> + crtc = to_intel_crtc(encoder->base.crtc);
> + crtc_state = to_intel_crtc_state(crtc->base.state);
> + drm_modeset_lock(>base.mutex, NULL);
> + seq_printf(m, "Enabled: %s\n",
> +yesno(crtc_state->dsc_params.compression_enable));
> + seq_printf(m, "Supported: %s\n",
> +yesno(drm_dp_sink_supports_dsc(intel_dp->dsc_dpcd)));
> + drm_modeset_unlock(>base.mutex);
> +
> + return 0;
> +}
> +
> +static ssize_t i915_dsc_support_write(struct file *file,
> + const char __user *ubuf,
> + size_t len, loff_t *offp)
> +{
> + bool dsc_enable = false;
> + int ret;
> + struct drm_connector *connector =
> + ((struct seq_file *)file->private_data)->private;
> + struct intel_encoder *encoder = intel_attached_encoder(connector);
> + struct intel_dp *intel_dp = enc_to_intel_dp(>base);
> +
> + if (len == 0)
> + return 0;
> +
> + DRM_DEBUG_DRIVER("Copied %d bytes from user to force DSC\n",
> + (unsigned int)len);
> +
> + ret = kstrtobool_from_user(ubuf, len, _enable);
> + if (ret < 0)
> + return ret;
> +
> + DRM_DEBUG_DRIVER("Got %s for DSC Enable\n",
> + (dsc_enable) ? "true" : "false");
> + intel_dp->force_dsc_en = dsc_enable;
> +
> + *offp += len;
> + return len;
> +}
> +
> +static int i915_dsc_support_open(struct inode *inode,
> + struct file *file)
> +{
> + return single_open(file, i915_dsc_support_show,
> +inode->i_private);
> +}
> +
> +static const struct file_operations i915_dsc_support_fops = {
> + .owner = THIS_MODULE,
> + .open = i915_dsc_support_open,
> + .read = seq_read,
> + .llseek = seq_lseek,
> + .release = single_release,
> + .write = i915_dsc_support_write
> +};
> +
> /**
> * i915_debugfs_connector_add - add i915 specific connector debugfs files
> * @connector: pointer to a registered drm_connector
> @@ -5017,9 +5083,12 @@ int i915_debugfs_connector_add(struct drm_connector
> *connector)
> return -ENODEV;
>
> if (connector->connector_type == DRM_MODE_CONNECTOR_DisplayPort ||
> - connector->connector_type == DRM_MODE_CONNECTOR_eDP)
> + connector->connector_type == DRM_MODE_CONNECTOR_eDP) {
> debugfs_create_file("i915_dpcd", S_IRUGO, root,
> connector, _dpcd_fops);
> + debugfs_create_file("i915_dsc_support", S_IRUGO, root,
> + connector, _dsc_support_fops);
> + }
>
> if (connector->connector_type == DRM_MODE_CONNECTOR_eDP) {
> debugfs_create_file("i915_panel_timings", S_IRUGO, root,
> diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
> index 72e6605f0ed7..0b5939992c2b 100644
> --- a/drivers/gpu/drm/i915/intel_dp.c
> +++ b/drivers/gpu/drm/i915/intel_dp.c
> @@ -2287,6 +2287,7 @@ intel_dp_compute_config(struct intel_encoder *encoder,
> if (adjusted_mode->flags & DRM_MODE_FLAG_DBLCLK)
> return false;
>
> + DRM_DEBUG_KMS("Force DSC en = %d\n", intel_dp->force_dsc_en);
> if (!intel_dp_compute_link_config(encoder, pipe_config))
> return false;
>
> diff --git a/drivers/gpu/drm/i915/intel_drv.h
>
Re: [Intel-gfx] [PATCH v6 27/28] drm/i915/dsc: Add Per connector debugfs node for DSC support/enable
On Wed, Oct 24, 2018 at 06:28:02PM -0400, Lyude Paul wrote:
> On Wed, 2018-10-24 at 15:28 -0700, Manasi Navare wrote:
> > DSC can be supported per DP connector. This patch adds a per connector
> > debugfs node to expose DSC support capability by the kernel.
> > The same node can be used from userspace to force DSC enable.
> >
> > v2:
> > * Use kstrtobool_from_user to avoid explicit error checking (Lyude)
> > * Rebase on drm-tip (Manasi)
> >
> > Cc: Rodrigo Vivi
> > Cc: Ville Syrjala
> > Cc: Anusha Srivatsa
> > Cc: Lyude Paul
> > Signed-off-by: Manasi Navare
> > Reviewed-by: Lyude Paul
>
> (just making a note to anyone passing by this: my R-B here is still valid!)
> (also thanks for the patch :)
Thanks Lyude for thsi note and the initial review feedback! Appreciate your
time and inputs.
Manasi
> > ---
> > drivers/gpu/drm/i915/i915_debugfs.c | 71 -
> > drivers/gpu/drm/i915/intel_dp.c | 1 +
> > drivers/gpu/drm/i915/intel_drv.h| 3 ++
> > 3 files changed, 74 insertions(+), 1 deletion(-)
> >
> > diff --git a/drivers/gpu/drm/i915/i915_debugfs.c
> > b/drivers/gpu/drm/i915/i915_debugfs.c
> > index 5cadfcd03ea9..6e631f08dd4b 100644
> > --- a/drivers/gpu/drm/i915/i915_debugfs.c
> > +++ b/drivers/gpu/drm/i915/i915_debugfs.c
> > @@ -4999,6 +4999,72 @@ static int i915_hdcp_sink_capability_show(struct
> > seq_file *m, void *data)
> > }
> > DEFINE_SHOW_ATTRIBUTE(i915_hdcp_sink_capability);
> >
> > +static int i915_dsc_support_show(struct seq_file *m, void *data)
> > +{
> > + struct drm_connector *connector = m->private;
> > + struct intel_encoder *encoder = intel_attached_encoder(connector);
> > + struct intel_dp *intel_dp =
> > + enc_to_intel_dp(>base);
> > + struct intel_crtc *crtc;
> > + struct intel_crtc_state *crtc_state;
> > +
> > + crtc = to_intel_crtc(encoder->base.crtc);
> > + crtc_state = to_intel_crtc_state(crtc->base.state);
> > + drm_modeset_lock(>base.mutex, NULL);
> > + seq_printf(m, "Enabled: %s\n",
> > + yesno(crtc_state->dsc_params.compression_enable));
> > + seq_printf(m, "Supported: %s\n",
> > + yesno(drm_dp_sink_supports_dsc(intel_dp->dsc_dpcd)));
> > + drm_modeset_unlock(>base.mutex);
> > +
> > + return 0;
> > +}
> > +
> > +static ssize_t i915_dsc_support_write(struct file *file,
> > + const char __user *ubuf,
> > + size_t len, loff_t *offp)
> > +{
> > + bool dsc_enable = false;
> > + int ret;
> > + struct drm_connector *connector =
> > + ((struct seq_file *)file->private_data)->private;
> > + struct intel_encoder *encoder = intel_attached_encoder(connector);
> > + struct intel_dp *intel_dp = enc_to_intel_dp(>base);
> > +
> > + if (len == 0)
> > + return 0;
> > +
> > + DRM_DEBUG_DRIVER("Copied %d bytes from user to force DSC\n",
> > +(unsigned int)len);
> > +
> > + ret = kstrtobool_from_user(ubuf, len, _enable);
> > + if (ret < 0)
> > + return ret;
> > +
> > + DRM_DEBUG_DRIVER("Got %s for DSC Enable\n",
> > +(dsc_enable) ? "true" : "false");
> > + intel_dp->force_dsc_en = dsc_enable;
> > +
> > + *offp += len;
> > + return len;
> > +}
> > +
> > +static int i915_dsc_support_open(struct inode *inode,
> > +struct file *file)
> > +{
> > + return single_open(file, i915_dsc_support_show,
> > + inode->i_private);
> > +}
> > +
> > +static const struct file_operations i915_dsc_support_fops = {
> > + .owner = THIS_MODULE,
> > + .open = i915_dsc_support_open,
> > + .read = seq_read,
> > + .llseek = seq_lseek,
> > + .release = single_release,
> > + .write = i915_dsc_support_write
> > +};
> > +
> > /**
> > * i915_debugfs_connector_add - add i915 specific connector debugfs files
> > * @connector: pointer to a registered drm_connector
> > @@ -5017,9 +5083,12 @@ int i915_debugfs_connector_add(struct drm_connector
> > *connector)
> > return -ENODEV;
> >
> > if (connector->connector_type == DRM_MODE_CONNECTOR_DisplayPort ||
> > - connector->connector_type == DRM_MODE_CONNECTOR_eDP)
> > + connector->connector_type == DRM_MODE_CONNECTOR_eDP) {
> > debugfs_create_file("i915_dpcd", S_IRUGO, root,
> > connector, _dpcd_fops);
> > + debugfs_create_file("i915_dsc_support", S_IRUGO, root,
> > + connector, _dsc_support_fops);
> > + }
> >
> > if (connector->connector_type == DRM_MODE_CONNECTOR_eDP) {
> > debugfs_create_file("i915_panel_timings", S_IRUGO, root,
> > diff --git a/drivers/gpu/drm/i915/intel_dp.c
> > b/drivers/gpu/drm/i915/intel_dp.c
> > index 72e6605f0ed7..0b5939992c2b 100644
> > --- a/drivers/gpu/drm/i915/intel_dp.c
> > +++ b/drivers/gpu/drm/i915/intel_dp.c
> > @@ -2287,6 +2287,7 @@ intel_dp_compute_config(struct intel_encoder *encoder,
> >
Re: [Intel-gfx] [PATCH v6 27/28] drm/i915/dsc: Add Per connector debugfs node for DSC support/enable
On Wed, 2018-10-24 at 15:28 -0700, Manasi Navare wrote:
> DSC can be supported per DP connector. This patch adds a per connector
> debugfs node to expose DSC support capability by the kernel.
> The same node can be used from userspace to force DSC enable.
>
> v2:
> * Use kstrtobool_from_user to avoid explicit error checking (Lyude)
> * Rebase on drm-tip (Manasi)
>
> Cc: Rodrigo Vivi
> Cc: Ville Syrjala
> Cc: Anusha Srivatsa
> Cc: Lyude Paul
> Signed-off-by: Manasi Navare
> Reviewed-by: Lyude Paul
(just making a note to anyone passing by this: my R-B here is still valid!)
(also thanks for the patch :)
> ---
> drivers/gpu/drm/i915/i915_debugfs.c | 71 -
> drivers/gpu/drm/i915/intel_dp.c | 1 +
> drivers/gpu/drm/i915/intel_drv.h| 3 ++
> 3 files changed, 74 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/i915/i915_debugfs.c
> b/drivers/gpu/drm/i915/i915_debugfs.c
> index 5cadfcd03ea9..6e631f08dd4b 100644
> --- a/drivers/gpu/drm/i915/i915_debugfs.c
> +++ b/drivers/gpu/drm/i915/i915_debugfs.c
> @@ -4999,6 +4999,72 @@ static int i915_hdcp_sink_capability_show(struct
> seq_file *m, void *data)
> }
> DEFINE_SHOW_ATTRIBUTE(i915_hdcp_sink_capability);
>
> +static int i915_dsc_support_show(struct seq_file *m, void *data)
> +{
> + struct drm_connector *connector = m->private;
> + struct intel_encoder *encoder = intel_attached_encoder(connector);
> + struct intel_dp *intel_dp =
> + enc_to_intel_dp(>base);
> + struct intel_crtc *crtc;
> + struct intel_crtc_state *crtc_state;
> +
> + crtc = to_intel_crtc(encoder->base.crtc);
> + crtc_state = to_intel_crtc_state(crtc->base.state);
> + drm_modeset_lock(>base.mutex, NULL);
> + seq_printf(m, "Enabled: %s\n",
> +yesno(crtc_state->dsc_params.compression_enable));
> + seq_printf(m, "Supported: %s\n",
> +yesno(drm_dp_sink_supports_dsc(intel_dp->dsc_dpcd)));
> + drm_modeset_unlock(>base.mutex);
> +
> + return 0;
> +}
> +
> +static ssize_t i915_dsc_support_write(struct file *file,
> + const char __user *ubuf,
> + size_t len, loff_t *offp)
> +{
> + bool dsc_enable = false;
> + int ret;
> + struct drm_connector *connector =
> + ((struct seq_file *)file->private_data)->private;
> + struct intel_encoder *encoder = intel_attached_encoder(connector);
> + struct intel_dp *intel_dp = enc_to_intel_dp(>base);
> +
> + if (len == 0)
> + return 0;
> +
> + DRM_DEBUG_DRIVER("Copied %d bytes from user to force DSC\n",
> + (unsigned int)len);
> +
> + ret = kstrtobool_from_user(ubuf, len, _enable);
> + if (ret < 0)
> + return ret;
> +
> + DRM_DEBUG_DRIVER("Got %s for DSC Enable\n",
> + (dsc_enable) ? "true" : "false");
> + intel_dp->force_dsc_en = dsc_enable;
> +
> + *offp += len;
> + return len;
> +}
> +
> +static int i915_dsc_support_open(struct inode *inode,
> + struct file *file)
> +{
> + return single_open(file, i915_dsc_support_show,
> +inode->i_private);
> +}
> +
> +static const struct file_operations i915_dsc_support_fops = {
> + .owner = THIS_MODULE,
> + .open = i915_dsc_support_open,
> + .read = seq_read,
> + .llseek = seq_lseek,
> + .release = single_release,
> + .write = i915_dsc_support_write
> +};
> +
> /**
> * i915_debugfs_connector_add - add i915 specific connector debugfs files
> * @connector: pointer to a registered drm_connector
> @@ -5017,9 +5083,12 @@ int i915_debugfs_connector_add(struct drm_connector
> *connector)
> return -ENODEV;
>
> if (connector->connector_type == DRM_MODE_CONNECTOR_DisplayPort ||
> - connector->connector_type == DRM_MODE_CONNECTOR_eDP)
> + connector->connector_type == DRM_MODE_CONNECTOR_eDP) {
> debugfs_create_file("i915_dpcd", S_IRUGO, root,
> connector, _dpcd_fops);
> + debugfs_create_file("i915_dsc_support", S_IRUGO, root,
> + connector, _dsc_support_fops);
> + }
>
> if (connector->connector_type == DRM_MODE_CONNECTOR_eDP) {
> debugfs_create_file("i915_panel_timings", S_IRUGO, root,
> diff --git a/drivers/gpu/drm/i915/intel_dp.c
> b/drivers/gpu/drm/i915/intel_dp.c
> index 72e6605f0ed7..0b5939992c2b 100644
> --- a/drivers/gpu/drm/i915/intel_dp.c
> +++ b/drivers/gpu/drm/i915/intel_dp.c
> @@ -2287,6 +2287,7 @@ intel_dp_compute_config(struct intel_encoder *encoder,
> if (adjusted_mode->flags & DRM_MODE_FLAG_DBLCLK)
> return false;
>
> + DRM_DEBUG_KMS("Force DSC en = %d\n", intel_dp->force_dsc_en);
> if (!intel_dp_compute_link_config(encoder, pipe_config))
> return false;
>
> diff --git a/drivers/gpu/drm/i915/intel_drv.h
[Intel-gfx] [PATCH v6 27/28] drm/i915/dsc: Add Per connector debugfs node for DSC support/enable
DSC can be supported per DP connector. This patch adds a per connector
debugfs node to expose DSC support capability by the kernel.
The same node can be used from userspace to force DSC enable.
v2:
* Use kstrtobool_from_user to avoid explicit error checking (Lyude)
* Rebase on drm-tip (Manasi)
Cc: Rodrigo Vivi
Cc: Ville Syrjala
Cc: Anusha Srivatsa
Cc: Lyude Paul
Signed-off-by: Manasi Navare
Reviewed-by: Lyude Paul
---
drivers/gpu/drm/i915/i915_debugfs.c | 71 -
drivers/gpu/drm/i915/intel_dp.c | 1 +
drivers/gpu/drm/i915/intel_drv.h| 3 ++
3 files changed, 74 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/i915/i915_debugfs.c
b/drivers/gpu/drm/i915/i915_debugfs.c
index 5cadfcd03ea9..6e631f08dd4b 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -4999,6 +4999,72 @@ static int i915_hdcp_sink_capability_show(struct
seq_file *m, void *data)
}
DEFINE_SHOW_ATTRIBUTE(i915_hdcp_sink_capability);
+static int i915_dsc_support_show(struct seq_file *m, void *data)
+{
+ struct drm_connector *connector = m->private;
+ struct intel_encoder *encoder = intel_attached_encoder(connector);
+ struct intel_dp *intel_dp =
+ enc_to_intel_dp(>base);
+ struct intel_crtc *crtc;
+ struct intel_crtc_state *crtc_state;
+
+ crtc = to_intel_crtc(encoder->base.crtc);
+ crtc_state = to_intel_crtc_state(crtc->base.state);
+ drm_modeset_lock(>base.mutex, NULL);
+ seq_printf(m, "Enabled: %s\n",
+ yesno(crtc_state->dsc_params.compression_enable));
+ seq_printf(m, "Supported: %s\n",
+ yesno(drm_dp_sink_supports_dsc(intel_dp->dsc_dpcd)));
+ drm_modeset_unlock(>base.mutex);
+
+ return 0;
+}
+
+static ssize_t i915_dsc_support_write(struct file *file,
+ const char __user *ubuf,
+ size_t len, loff_t *offp)
+{
+ bool dsc_enable = false;
+ int ret;
+ struct drm_connector *connector =
+ ((struct seq_file *)file->private_data)->private;
+ struct intel_encoder *encoder = intel_attached_encoder(connector);
+ struct intel_dp *intel_dp = enc_to_intel_dp(>base);
+
+ if (len == 0)
+ return 0;
+
+ DRM_DEBUG_DRIVER("Copied %d bytes from user to force DSC\n",
+(unsigned int)len);
+
+ ret = kstrtobool_from_user(ubuf, len, _enable);
+ if (ret < 0)
+ return ret;
+
+ DRM_DEBUG_DRIVER("Got %s for DSC Enable\n",
+(dsc_enable) ? "true" : "false");
+ intel_dp->force_dsc_en = dsc_enable;
+
+ *offp += len;
+ return len;
+}
+
+static int i915_dsc_support_open(struct inode *inode,
+struct file *file)
+{
+ return single_open(file, i915_dsc_support_show,
+ inode->i_private);
+}
+
+static const struct file_operations i915_dsc_support_fops = {
+ .owner = THIS_MODULE,
+ .open = i915_dsc_support_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+ .write = i915_dsc_support_write
+};
+
/**
* i915_debugfs_connector_add - add i915 specific connector debugfs files
* @connector: pointer to a registered drm_connector
@@ -5017,9 +5083,12 @@ int i915_debugfs_connector_add(struct drm_connector
*connector)
return -ENODEV;
if (connector->connector_type == DRM_MODE_CONNECTOR_DisplayPort ||
- connector->connector_type == DRM_MODE_CONNECTOR_eDP)
+ connector->connector_type == DRM_MODE_CONNECTOR_eDP) {
debugfs_create_file("i915_dpcd", S_IRUGO, root,
connector, _dpcd_fops);
+ debugfs_create_file("i915_dsc_support", S_IRUGO, root,
+ connector, _dsc_support_fops);
+ }
if (connector->connector_type == DRM_MODE_CONNECTOR_eDP) {
debugfs_create_file("i915_panel_timings", S_IRUGO, root,
diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index 72e6605f0ed7..0b5939992c2b 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -2287,6 +2287,7 @@ intel_dp_compute_config(struct intel_encoder *encoder,
if (adjusted_mode->flags & DRM_MODE_FLAG_DBLCLK)
return false;
+ DRM_DEBUG_KMS("Force DSC en = %d\n", intel_dp->force_dsc_en);
if (!intel_dp_compute_link_config(encoder, pipe_config))
return false;
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index 4f5d17bcd54e..16bbc3768e02 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -1196,6 +1196,9 @@ struct intel_dp {
/* Displayport compliance testing */
struct intel_dp_compliance compliance;
+
+
