Re: [Intel-gfx] [PATCH v8 06/10] drm/i915/hdcp: Retain hdcp_capable return codes
> -Original Message-
> From: Kandpal, Suraj
> Sent: Monday, April 3, 2023 12:12 PM
> To: Mark Yacoub ; Jani Nikula
> ; Joonas Lahtinen
> ; Vivi, Rodrigo ;
> Tvrtko Ursulin ; David Airlie
> ; Daniel Vetter
> Cc: seanp...@chromium.org; diand...@chromium.org; dri-
> de...@lists.freedesktop.org; freedr...@lists.freedesktop.org; intel-
> g...@lists.freedesktop.org; Nikula, Jani ; linux-
> ker...@vger.kernel.org
> Subject: RE: [PATCH v8 06/10] drm/i915/hdcp: Retain hdcp_capable return
> codes
>
>
>
> > -Original Message-
> > From: Mark Yacoub
> > Sent: Saturday, April 1, 2023 3:42 AM
> > To: Jani Nikula ; Joonas Lahtinen
> > ; Vivi, Rodrigo
> > ; Tvrtko Ursulin
> > ; David Airlie ;
> > Daniel Vetter
> > Cc: seanp...@chromium.org; Kandpal, Suraj ;
> > diand...@chromium.org; dri-de...@lists.freedesktop.org;
> > freedr...@lists.freedesktop.org; intel-gfx@lists.freedesktop.org;
> > Nikula, Jani ; Mark Yacoub
> > ; linux- ker...@vger.kernel.org
> > Subject: [PATCH v8 06/10] drm/i915/hdcp: Retain hdcp_capable return
> > codes
> >
> > From: Sean Paul
> >
> > The shim functions return error codes, but they are discarded in
> > intel_hdcp.c. This patch plumbs the return codes through so they are
> > properly handled.
> >
> > Acked-by: Jani Nikula
> > Reviewed-by: Rodrigo Vivi
> > Signed-off-by: Sean Paul
> > Signed-off-by: Mark Yacoub
> >
> > ---
> > Changes in v2:
> > -None
> > Changes in v3:
> > -None
> > Changes in v4:
> > -None
> > Changes in v5:
> > -None
> > Changes in v6:
> > -Rebased
> > Changes in v7:
> > -None
> > Changes in v8:
> > -None
> >
> > .../drm/i915/display/intel_display_debugfs.c | 9 +++-
> > drivers/gpu/drm/i915/display/intel_hdcp.c | 51 ++-
> > drivers/gpu/drm/i915/display/intel_hdcp.h | 4 +-
> > 3 files changed, 37 insertions(+), 27 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/i915/display/intel_display_debugfs.c
> > b/drivers/gpu/drm/i915/display/intel_display_debugfs.c
> > index 7bcd90384a46d..a14b86a07e545 100644
> > --- a/drivers/gpu/drm/i915/display/intel_display_debugfs.c
> > +++ b/drivers/gpu/drm/i915/display/intel_display_debugfs.c
> > @@ -494,6 +494,7 @@ static void intel_panel_info(struct seq_file *m,
> > static void intel_hdcp_info(struct seq_file *m,
> > struct intel_connector *intel_connector) {
> > + int ret;
> > bool hdcp_cap, hdcp2_cap;
> >
> > if (!intel_connector->hdcp.shim) {
> > @@ -501,8 +502,12 @@ static void intel_hdcp_info(struct seq_file *m,
> > goto out;
> > }
> >
> > - hdcp_cap = intel_hdcp_capable(intel_connector);
> > - hdcp2_cap = intel_hdcp2_capable(intel_connector);
> > + ret = intel_hdcp_capable(intel_connector, _cap);
> > + if (ret)
> > + hdcp_cap = false;
> > + ret = intel_hdcp2_capable(intel_connector, _cap);
> > + if (ret)
> > + hdcp2_cap = false;
> >
> > if (hdcp_cap)
> > seq_puts(m, "HDCP1.4 ");
> > diff --git a/drivers/gpu/drm/i915/display/intel_hdcp.c
> > b/drivers/gpu/drm/i915/display/intel_hdcp.c
> > index 0a20bc41be55d..61a862ae1f286 100644
> > --- a/drivers/gpu/drm/i915/display/intel_hdcp.c
> > +++ b/drivers/gpu/drm/i915/display/intel_hdcp.c
> > @@ -177,50 +177,49 @@ int intel_hdcp_read_valid_bksv(struct
> > intel_digital_port *dig_port, }
> >
> > /* Is HDCP1.4 capable on Platform and Sink */ -bool
> > intel_hdcp_capable(struct intel_connector *connector)
> > +int intel_hdcp_capable(struct intel_connector *connector, bool
> > +*capable)
> > {
> > struct intel_digital_port *dig_port =
> > intel_attached_dig_port(connector);
> > const struct intel_hdcp_shim *shim = connector->hdcp.shim;
> > - bool capable = false;
> > u8 bksv[5];
> >
> > + *capable = false;
> > +
> > if (!shim)
> > - return capable;
> > + return 0;
> >
> > - if (shim->hdcp_capable) {
> > - shim->hdcp_capable(dig_port, );
> > - } else {
> > - if (!intel_hdcp_read_valid_bksv(dig_port, shim, bksv))
> > - capable = true;
> > - }
> > + if (shim->hdcp_capable)
> > + return shim->hdcp_capable(dig_port, capable);
> > +
> > + if (!intel_hdcp_read_valid_bksv(dig_port, shim, bksv))
> > + *capable = true;
> >
> > - return capable;
> > + return 0;
> > }
> >
> > /* Is HDCP2.2 capable on Platform and Sink */ -bool
> > intel_hdcp2_capable(struct intel_connector *connector)
> > +int intel_hdcp2_capable(struct intel_connector *connector, bool
> > +*capable)
> > {
> > struct intel_digital_port *dig_port =
> > intel_attached_dig_port(connector);
> > struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
> > struct intel_hdcp *hdcp = >hdcp;
> > - bool capable = false;
> > +
> > + *capable = false;
> >
> > /* I915 support for HDCP2.2 */
> > if (!hdcp->hdcp2_supported)
> > - return false;
> > + return 0;
> >
> > /* MEI interface is solid */
> >
Re: [Intel-gfx] [PATCH v8 06/10] drm/i915/hdcp: Retain hdcp_capable return codes
> -Original Message-
> From: Mark Yacoub
> Sent: Saturday, April 1, 2023 3:42 AM
> To: Jani Nikula ; Joonas Lahtinen
> ; Vivi, Rodrigo ;
> Tvrtko Ursulin ; David Airlie
> ; Daniel Vetter
> Cc: seanp...@chromium.org; Kandpal, Suraj ;
> diand...@chromium.org; dri-de...@lists.freedesktop.org;
> freedr...@lists.freedesktop.org; intel-gfx@lists.freedesktop.org; Nikula, Jani
> ; Mark Yacoub ; linux-
> ker...@vger.kernel.org
> Subject: [PATCH v8 06/10] drm/i915/hdcp: Retain hdcp_capable return codes
>
> From: Sean Paul
>
> The shim functions return error codes, but they are discarded in
> intel_hdcp.c. This patch plumbs the return codes through so they are
> properly handled.
>
> Acked-by: Jani Nikula
> Reviewed-by: Rodrigo Vivi
> Signed-off-by: Sean Paul
> Signed-off-by: Mark Yacoub
>
> ---
> Changes in v2:
> -None
> Changes in v3:
> -None
> Changes in v4:
> -None
> Changes in v5:
> -None
> Changes in v6:
> -Rebased
> Changes in v7:
> -None
> Changes in v8:
> -None
>
> .../drm/i915/display/intel_display_debugfs.c | 9 +++-
> drivers/gpu/drm/i915/display/intel_hdcp.c | 51 ++-
> drivers/gpu/drm/i915/display/intel_hdcp.h | 4 +-
> 3 files changed, 37 insertions(+), 27 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/display/intel_display_debugfs.c
> b/drivers/gpu/drm/i915/display/intel_display_debugfs.c
> index 7bcd90384a46d..a14b86a07e545 100644
> --- a/drivers/gpu/drm/i915/display/intel_display_debugfs.c
> +++ b/drivers/gpu/drm/i915/display/intel_display_debugfs.c
> @@ -494,6 +494,7 @@ static void intel_panel_info(struct seq_file *m, static
> void intel_hdcp_info(struct seq_file *m,
> struct intel_connector *intel_connector) {
> + int ret;
> bool hdcp_cap, hdcp2_cap;
>
> if (!intel_connector->hdcp.shim) {
> @@ -501,8 +502,12 @@ static void intel_hdcp_info(struct seq_file *m,
> goto out;
> }
>
> - hdcp_cap = intel_hdcp_capable(intel_connector);
> - hdcp2_cap = intel_hdcp2_capable(intel_connector);
> + ret = intel_hdcp_capable(intel_connector, _cap);
> + if (ret)
> + hdcp_cap = false;
> + ret = intel_hdcp2_capable(intel_connector, _cap);
> + if (ret)
> + hdcp2_cap = false;
>
> if (hdcp_cap)
> seq_puts(m, "HDCP1.4 ");
> diff --git a/drivers/gpu/drm/i915/display/intel_hdcp.c
> b/drivers/gpu/drm/i915/display/intel_hdcp.c
> index 0a20bc41be55d..61a862ae1f286 100644
> --- a/drivers/gpu/drm/i915/display/intel_hdcp.c
> +++ b/drivers/gpu/drm/i915/display/intel_hdcp.c
> @@ -177,50 +177,49 @@ int intel_hdcp_read_valid_bksv(struct
> intel_digital_port *dig_port, }
>
> /* Is HDCP1.4 capable on Platform and Sink */ -bool
> intel_hdcp_capable(struct intel_connector *connector)
> +int intel_hdcp_capable(struct intel_connector *connector, bool
> +*capable)
> {
> struct intel_digital_port *dig_port =
> intel_attached_dig_port(connector);
> const struct intel_hdcp_shim *shim = connector->hdcp.shim;
> - bool capable = false;
> u8 bksv[5];
>
> + *capable = false;
> +
> if (!shim)
> - return capable;
> + return 0;
>
> - if (shim->hdcp_capable) {
> - shim->hdcp_capable(dig_port, );
> - } else {
> - if (!intel_hdcp_read_valid_bksv(dig_port, shim, bksv))
> - capable = true;
> - }
> + if (shim->hdcp_capable)
> + return shim->hdcp_capable(dig_port, capable);
> +
> + if (!intel_hdcp_read_valid_bksv(dig_port, shim, bksv))
> + *capable = true;
>
> - return capable;
> + return 0;
> }
>
> /* Is HDCP2.2 capable on Platform and Sink */ -bool
> intel_hdcp2_capable(struct intel_connector *connector)
> +int intel_hdcp2_capable(struct intel_connector *connector, bool
> +*capable)
> {
> struct intel_digital_port *dig_port =
> intel_attached_dig_port(connector);
> struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
> struct intel_hdcp *hdcp = >hdcp;
> - bool capable = false;
> +
> + *capable = false;
>
> /* I915 support for HDCP2.2 */
> if (!hdcp->hdcp2_supported)
> - return false;
> + return 0;
>
> /* MEI interface is solid */
> mutex_lock(_priv->display.hdcp.comp_mutex);
> if (!dev_priv->display.hdcp.comp_added || !dev_priv-
> >display.hdcp.master) {
> mutex_unlock(_priv->display.hdcp.comp_mutex);
> - return false;
> + return 0;
> }
> mutex_unlock(_priv->display.hdcp.comp_mutex);
>
> /* Sink's capability for HDCP2.2 */
> - hdcp->shim->hdcp_2_2_capable(dig_port, );
> -
> - return capable;
> + return hdcp->shim->hdcp_2_2_capable(dig_port, capable);
> }
>
> static bool intel_hdcp_in_use(struct drm_i915_private *dev_priv, @@ -
> 2355,6 +2354,7 @@ int intel_hdcp_enable(struct intel_connector
> *connector,
> struct intel_digital_port
[Intel-gfx] [PATCH v8 06/10] drm/i915/hdcp: Retain hdcp_capable return codes
From: Sean Paul
The shim functions return error codes, but they are discarded in
intel_hdcp.c. This patch plumbs the return codes through so they are
properly handled.
Acked-by: Jani Nikula
Reviewed-by: Rodrigo Vivi
Signed-off-by: Sean Paul
Signed-off-by: Mark Yacoub
---
Changes in v2:
-None
Changes in v3:
-None
Changes in v4:
-None
Changes in v5:
-None
Changes in v6:
-Rebased
Changes in v7:
-None
Changes in v8:
-None
.../drm/i915/display/intel_display_debugfs.c | 9 +++-
drivers/gpu/drm/i915/display/intel_hdcp.c | 51 ++-
drivers/gpu/drm/i915/display/intel_hdcp.h | 4 +-
3 files changed, 37 insertions(+), 27 deletions(-)
diff --git a/drivers/gpu/drm/i915/display/intel_display_debugfs.c
b/drivers/gpu/drm/i915/display/intel_display_debugfs.c
index 7bcd90384a46d..a14b86a07e545 100644
--- a/drivers/gpu/drm/i915/display/intel_display_debugfs.c
+++ b/drivers/gpu/drm/i915/display/intel_display_debugfs.c
@@ -494,6 +494,7 @@ static void intel_panel_info(struct seq_file *m,
static void intel_hdcp_info(struct seq_file *m,
struct intel_connector *intel_connector)
{
+ int ret;
bool hdcp_cap, hdcp2_cap;
if (!intel_connector->hdcp.shim) {
@@ -501,8 +502,12 @@ static void intel_hdcp_info(struct seq_file *m,
goto out;
}
- hdcp_cap = intel_hdcp_capable(intel_connector);
- hdcp2_cap = intel_hdcp2_capable(intel_connector);
+ ret = intel_hdcp_capable(intel_connector, _cap);
+ if (ret)
+ hdcp_cap = false;
+ ret = intel_hdcp2_capable(intel_connector, _cap);
+ if (ret)
+ hdcp2_cap = false;
if (hdcp_cap)
seq_puts(m, "HDCP1.4 ");
diff --git a/drivers/gpu/drm/i915/display/intel_hdcp.c
b/drivers/gpu/drm/i915/display/intel_hdcp.c
index 0a20bc41be55d..61a862ae1f286 100644
--- a/drivers/gpu/drm/i915/display/intel_hdcp.c
+++ b/drivers/gpu/drm/i915/display/intel_hdcp.c
@@ -177,50 +177,49 @@ int intel_hdcp_read_valid_bksv(struct intel_digital_port
*dig_port,
}
/* Is HDCP1.4 capable on Platform and Sink */
-bool intel_hdcp_capable(struct intel_connector *connector)
+int intel_hdcp_capable(struct intel_connector *connector, bool *capable)
{
struct intel_digital_port *dig_port =
intel_attached_dig_port(connector);
const struct intel_hdcp_shim *shim = connector->hdcp.shim;
- bool capable = false;
u8 bksv[5];
+ *capable = false;
+
if (!shim)
- return capable;
+ return 0;
- if (shim->hdcp_capable) {
- shim->hdcp_capable(dig_port, );
- } else {
- if (!intel_hdcp_read_valid_bksv(dig_port, shim, bksv))
- capable = true;
- }
+ if (shim->hdcp_capable)
+ return shim->hdcp_capable(dig_port, capable);
+
+ if (!intel_hdcp_read_valid_bksv(dig_port, shim, bksv))
+ *capable = true;
- return capable;
+ return 0;
}
/* Is HDCP2.2 capable on Platform and Sink */
-bool intel_hdcp2_capable(struct intel_connector *connector)
+int intel_hdcp2_capable(struct intel_connector *connector, bool *capable)
{
struct intel_digital_port *dig_port =
intel_attached_dig_port(connector);
struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
struct intel_hdcp *hdcp = >hdcp;
- bool capable = false;
+
+ *capable = false;
/* I915 support for HDCP2.2 */
if (!hdcp->hdcp2_supported)
- return false;
+ return 0;
/* MEI interface is solid */
mutex_lock(_priv->display.hdcp.comp_mutex);
if (!dev_priv->display.hdcp.comp_added ||
!dev_priv->display.hdcp.master) {
mutex_unlock(_priv->display.hdcp.comp_mutex);
- return false;
+ return 0;
}
mutex_unlock(_priv->display.hdcp.comp_mutex);
/* Sink's capability for HDCP2.2 */
- hdcp->shim->hdcp_2_2_capable(dig_port, );
-
- return capable;
+ return hdcp->shim->hdcp_2_2_capable(dig_port, capable);
}
static bool intel_hdcp_in_use(struct drm_i915_private *dev_priv,
@@ -2355,6 +2354,7 @@ int intel_hdcp_enable(struct intel_connector *connector,
struct intel_digital_port *dig_port =
intel_attached_dig_port(connector);
struct intel_hdcp *hdcp = >hdcp;
unsigned long check_link_interval = DRM_HDCP_CHECK_PERIOD_MS;
+ bool capable;
int ret = -EINVAL;
if (!hdcp->shim)
@@ -2373,21 +2373,27 @@ int intel_hdcp_enable(struct intel_connector *connector,
* Considering that HDCP2.2 is more secure than HDCP1.4, If the setup
* is capable of HDCP2.2, it is preferred to use HDCP2.2.
*/
- if (intel_hdcp2_capable(connector)) {
+ ret = intel_hdcp2_capable(connector, );
+ if (capable) {
ret = _intel_hdcp2_enable(connector);
- if
