Re: [Intel-gfx] [PATCH v9 01/10] drm/hdcp: Add drm_hdcp_atomic_check()
On Tue, 18 Apr 2023, "Kandpal, Suraj" wrote:
> Yacoub
>> ; linux-ker...@vger.kernel.org
>> Subject: [PATCH v9 01/10] drm/hdcp: Add drm_hdcp_atomic_check()
>>
>> From: Sean Paul
>>
>> Move the hdcp atomic check from i915 to drm_hdcp so other drivers can use
>> it. No functional changes, just cleaned up some of the code when moving it
>> over.
>>
>> Acked-by: Jani Nikula
>> Reviewed-by: Rodrigo Vivi
>> Reviewed-by: Dmitry Baryshkov
>> 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:
>> -Rebase: move helper from drm_hdcp.c to drm_hdcp_helper.c Changes in
>> v7:
>> -Removed links to patch from commit msg (Dmitry Baryshkov)
>>
>> drivers/gpu/drm/display/drm_hdcp_helper.c | 64
>> +
>> drivers/gpu/drm/i915/display/intel_atomic.c | 4 +-
>> drivers/gpu/drm/i915/display/intel_hdcp.c | 47 ---
>> drivers/gpu/drm/i915/display/intel_hdcp.h | 3 -
>> include/drm/display/drm_hdcp_helper.h | 3 +
>> 5 files changed, 69 insertions(+), 52 deletions(-)
>>
>> diff --git a/drivers/gpu/drm/display/drm_hdcp_helper.c
>> b/drivers/gpu/drm/display/drm_hdcp_helper.c
>> index e78999c72bd77..7ca390b3ea106 100644
>> --- a/drivers/gpu/drm/display/drm_hdcp_helper.c
>> +++ b/drivers/gpu/drm/display/drm_hdcp_helper.c
>> @@ -20,6 +20,7 @@
>> #include
>> #include
>> #include
>> +#include
>>
>> static inline void drm_hdcp_print_ksv(const u8 *ksv) { @@ -419,3 +420,66
>> @@ void drm_hdcp_update_content_protection(struct drm_connector
>> *connector,
>>dev-
>> >mode_config.content_protection_property);
>> }
>> EXPORT_SYMBOL(drm_hdcp_update_content_protection);
>> +
>> +/**
>> + * drm_hdcp_atomic_check - Helper for drivers to call during
>> +connector->atomic_check
>> + *
>> + * @state: pointer to the atomic state being checked
>> + * @connector: drm_connector on which content protection state needs an
>> +update
>> + *
>> + * This function can be used by display drivers to perform an atomic
>> +check on the
>> + * hdcp state elements. If hdcp state has changed, this function will
>> +set
>> + * mode_changed on the crtc driving the connector so it can update its
>> +hardware
>> + * to match the hdcp state.
>> + */
>> +void drm_hdcp_atomic_check(struct drm_connector *connector,
>> +struct drm_atomic_state *state)
>> +{
>> + struct drm_connector_state *new_conn_state, *old_conn_state;
>> + struct drm_crtc_state *new_crtc_state;
>> + u64 old_hdcp, new_hdcp;
>> +
>> + old_conn_state = drm_atomic_get_old_connector_state(state,
>> connector);
>> + old_hdcp = old_conn_state->content_protection;
>> +
>> + new_conn_state = drm_atomic_get_new_connector_state(state,
>> connector);
>> + new_hdcp = new_conn_state->content_protection;
>> +
>
> Nit: Why not assign these as right when they are declared we would end up
> using less lines
The rule of thumb is to only initialize trivial stuff at declaration.
BR,
Jani.
>
>> + if (!new_conn_state->crtc) {
>> + /*
>> + * If the connector is being disabled with CP enabled, mark it
>> + * desired so it's re-enabled when the connector is brought
>> back
>> + */
>> + if (old_hdcp ==
>> DRM_MODE_CONTENT_PROTECTION_ENABLED)
>> + new_conn_state->content_protection =
>> +
>> DRM_MODE_CONTENT_PROTECTION_DESIRED;
>> + return;
>> + }
>> +
>> + new_crtc_state =
>> + drm_atomic_get_new_crtc_state(state, new_conn_state-
>> >crtc);
>> + if (drm_atomic_crtc_needs_modeset(new_crtc_state) &&
>> + (old_hdcp == DRM_MODE_CONTENT_PROTECTION_ENABLED &&
>> + new_hdcp != DRM_MODE_CONTENT_PROTECTION_UNDESIRED))
>> + new_conn_state->content_protection =
>> + DRM_MODE_CONTENT_PROTECTION_DESIRED;
>> +
>> + /*
>> + * Nothing to do if content type is unchanged and one of:
>> + * - state didn't change
>> + * - HDCP was activated since the last commit
>> + * - attempting to set to desired while already enabled
>> + */
>> + if (old_hdcp == new_hdcp ||
>> + (old_hdcp == DRM_MODE_CONTENT_PROTECTION_DESIRED &&
>> + new_hdcp == DRM_MODE_CONTENT_PROTECTION_ENABLED) ||
>> + (old_hdcp == DRM_MODE_CONTENT_PROTECTION_ENABLED &&
>> + new_hdcp == DRM_MODE_CONTENT_PROTECTION_DESIRED)) {
>> + if (old_conn_state->hdcp_content_type ==
>> + new_conn_state->hdcp_content_type)
>> + return;
>> + }
>> +
>> + new_crtc_state->mode_changed = true;
>> +}
>> +EXPORT_SYMBOL(drm_hdcp_atomic_check);
>> diff --git a/drivers/gpu/drm/i915/display/intel_atomic.c
>> b/drivers/gpu/drm/i915/display/intel_atomic.c
>> index a9a3f3715279d..e9d00b6a63d39 100644
>> ---
Re: [Intel-gfx] [PATCH v9 01/10] drm/hdcp: Add drm_hdcp_atomic_check()
Yacoub
> ; linux-ker...@vger.kernel.org
> Subject: [PATCH v9 01/10] drm/hdcp: Add drm_hdcp_atomic_check()
>
> From: Sean Paul
>
> Move the hdcp atomic check from i915 to drm_hdcp so other drivers can use
> it. No functional changes, just cleaned up some of the code when moving it
> over.
>
> Acked-by: Jani Nikula
> Reviewed-by: Rodrigo Vivi
> Reviewed-by: Dmitry Baryshkov
> 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:
> -Rebase: move helper from drm_hdcp.c to drm_hdcp_helper.c Changes in
> v7:
> -Removed links to patch from commit msg (Dmitry Baryshkov)
>
> drivers/gpu/drm/display/drm_hdcp_helper.c | 64
> +
> drivers/gpu/drm/i915/display/intel_atomic.c | 4 +-
> drivers/gpu/drm/i915/display/intel_hdcp.c | 47 ---
> drivers/gpu/drm/i915/display/intel_hdcp.h | 3 -
> include/drm/display/drm_hdcp_helper.h | 3 +
> 5 files changed, 69 insertions(+), 52 deletions(-)
>
> diff --git a/drivers/gpu/drm/display/drm_hdcp_helper.c
> b/drivers/gpu/drm/display/drm_hdcp_helper.c
> index e78999c72bd77..7ca390b3ea106 100644
> --- a/drivers/gpu/drm/display/drm_hdcp_helper.c
> +++ b/drivers/gpu/drm/display/drm_hdcp_helper.c
> @@ -20,6 +20,7 @@
> #include
> #include
> #include
> +#include
>
> static inline void drm_hdcp_print_ksv(const u8 *ksv) { @@ -419,3 +420,66
> @@ void drm_hdcp_update_content_protection(struct drm_connector
> *connector,
>dev-
> >mode_config.content_protection_property);
> }
> EXPORT_SYMBOL(drm_hdcp_update_content_protection);
> +
> +/**
> + * drm_hdcp_atomic_check - Helper for drivers to call during
> +connector->atomic_check
> + *
> + * @state: pointer to the atomic state being checked
> + * @connector: drm_connector on which content protection state needs an
> +update
> + *
> + * This function can be used by display drivers to perform an atomic
> +check on the
> + * hdcp state elements. If hdcp state has changed, this function will
> +set
> + * mode_changed on the crtc driving the connector so it can update its
> +hardware
> + * to match the hdcp state.
> + */
> +void drm_hdcp_atomic_check(struct drm_connector *connector,
> +struct drm_atomic_state *state)
> +{
> + struct drm_connector_state *new_conn_state, *old_conn_state;
> + struct drm_crtc_state *new_crtc_state;
> + u64 old_hdcp, new_hdcp;
> +
> + old_conn_state = drm_atomic_get_old_connector_state(state,
> connector);
> + old_hdcp = old_conn_state->content_protection;
> +
> + new_conn_state = drm_atomic_get_new_connector_state(state,
> connector);
> + new_hdcp = new_conn_state->content_protection;
> +
Nit: Why not assign these as right when they are declared we would end up using
less lines
> + if (!new_conn_state->crtc) {
> + /*
> + * If the connector is being disabled with CP enabled, mark it
> + * desired so it's re-enabled when the connector is brought
> back
> + */
> + if (old_hdcp ==
> DRM_MODE_CONTENT_PROTECTION_ENABLED)
> + new_conn_state->content_protection =
> +
> DRM_MODE_CONTENT_PROTECTION_DESIRED;
> + return;
> + }
> +
> + new_crtc_state =
> + drm_atomic_get_new_crtc_state(state, new_conn_state-
> >crtc);
> + if (drm_atomic_crtc_needs_modeset(new_crtc_state) &&
> + (old_hdcp == DRM_MODE_CONTENT_PROTECTION_ENABLED &&
> + new_hdcp != DRM_MODE_CONTENT_PROTECTION_UNDESIRED))
> + new_conn_state->content_protection =
> + DRM_MODE_CONTENT_PROTECTION_DESIRED;
> +
> + /*
> + * Nothing to do if content type is unchanged and one of:
> + * - state didn't change
> + * - HDCP was activated since the last commit
> + * - attempting to set to desired while already enabled
> + */
> + if (old_hdcp == new_hdcp ||
> + (old_hdcp == DRM_MODE_CONTENT_PROTECTION_DESIRED &&
> + new_hdcp == DRM_MODE_CONTENT_PROTECTION_ENABLED) ||
> + (old_hdcp == DRM_MODE_CONTENT_PROTECTION_ENABLED &&
> + new_hdcp == DRM_MODE_CONTENT_PROTECTION_DESIRED)) {
> + if (old_conn_state->hdcp_content_type ==
> + new_conn_state->hdcp_content_type)
> + return;
> + }
> +
> + new_crtc_state->mode_changed = true;
> +}
> +EXPORT_SYMBOL(drm_hdcp_atomic_check);
> diff --git a/drivers/gpu/drm/i915/display/intel_atomic.c
> b/drivers/gpu/drm/i915/display/intel_atomic.c
> index a9a3f3715279d..e9d00b6a63d39 100644
> --- a/drivers/gpu/drm/i915/display/intel_atomic.c
> +++ b/drivers/gpu/drm/i915/display/intel_atomic.c
> @@ -32,6 +32,7 @@
> #include
> #include
> #include
> +#include
>
> #include "i915_drv.h"
> #include "i915_reg.h"
> @@ -39,7 +40,6 @@
> #include "intel_cdclk.h"
> #include
[Intel-gfx] [PATCH v9 01/10] drm/hdcp: Add drm_hdcp_atomic_check()
From: Sean Paul
Move the hdcp atomic check from i915 to drm_hdcp so other
drivers can use it. No functional changes, just cleaned up some of the
code when moving it over.
Acked-by: Jani Nikula
Reviewed-by: Rodrigo Vivi
Reviewed-by: Dmitry Baryshkov
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:
-Rebase: move helper from drm_hdcp.c to drm_hdcp_helper.c
Changes in v7:
-Removed links to patch from commit msg (Dmitry Baryshkov)
drivers/gpu/drm/display/drm_hdcp_helper.c | 64 +
drivers/gpu/drm/i915/display/intel_atomic.c | 4 +-
drivers/gpu/drm/i915/display/intel_hdcp.c | 47 ---
drivers/gpu/drm/i915/display/intel_hdcp.h | 3 -
include/drm/display/drm_hdcp_helper.h | 3 +
5 files changed, 69 insertions(+), 52 deletions(-)
diff --git a/drivers/gpu/drm/display/drm_hdcp_helper.c
b/drivers/gpu/drm/display/drm_hdcp_helper.c
index e78999c72bd77..7ca390b3ea106 100644
--- a/drivers/gpu/drm/display/drm_hdcp_helper.c
+++ b/drivers/gpu/drm/display/drm_hdcp_helper.c
@@ -20,6 +20,7 @@
#include
#include
#include
+#include
static inline void drm_hdcp_print_ksv(const u8 *ksv)
{
@@ -419,3 +420,66 @@ void drm_hdcp_update_content_protection(struct
drm_connector *connector,
dev->mode_config.content_protection_property);
}
EXPORT_SYMBOL(drm_hdcp_update_content_protection);
+
+/**
+ * drm_hdcp_atomic_check - Helper for drivers to call during
connector->atomic_check
+ *
+ * @state: pointer to the atomic state being checked
+ * @connector: drm_connector on which content protection state needs an update
+ *
+ * This function can be used by display drivers to perform an atomic check on
the
+ * hdcp state elements. If hdcp state has changed, this function will set
+ * mode_changed on the crtc driving the connector so it can update its hardware
+ * to match the hdcp state.
+ */
+void drm_hdcp_atomic_check(struct drm_connector *connector,
+ struct drm_atomic_state *state)
+{
+ struct drm_connector_state *new_conn_state, *old_conn_state;
+ struct drm_crtc_state *new_crtc_state;
+ u64 old_hdcp, new_hdcp;
+
+ old_conn_state = drm_atomic_get_old_connector_state(state, connector);
+ old_hdcp = old_conn_state->content_protection;
+
+ new_conn_state = drm_atomic_get_new_connector_state(state, connector);
+ new_hdcp = new_conn_state->content_protection;
+
+ if (!new_conn_state->crtc) {
+ /*
+* If the connector is being disabled with CP enabled, mark it
+* desired so it's re-enabled when the connector is brought back
+*/
+ if (old_hdcp == DRM_MODE_CONTENT_PROTECTION_ENABLED)
+ new_conn_state->content_protection =
+ DRM_MODE_CONTENT_PROTECTION_DESIRED;
+ return;
+ }
+
+ new_crtc_state =
+ drm_atomic_get_new_crtc_state(state, new_conn_state->crtc);
+ if (drm_atomic_crtc_needs_modeset(new_crtc_state) &&
+ (old_hdcp == DRM_MODE_CONTENT_PROTECTION_ENABLED &&
+new_hdcp != DRM_MODE_CONTENT_PROTECTION_UNDESIRED))
+ new_conn_state->content_protection =
+ DRM_MODE_CONTENT_PROTECTION_DESIRED;
+
+ /*
+* Nothing to do if content type is unchanged and one of:
+* - state didn't change
+* - HDCP was activated since the last commit
+* - attempting to set to desired while already enabled
+*/
+ if (old_hdcp == new_hdcp ||
+ (old_hdcp == DRM_MODE_CONTENT_PROTECTION_DESIRED &&
+new_hdcp == DRM_MODE_CONTENT_PROTECTION_ENABLED) ||
+ (old_hdcp == DRM_MODE_CONTENT_PROTECTION_ENABLED &&
+new_hdcp == DRM_MODE_CONTENT_PROTECTION_DESIRED)) {
+ if (old_conn_state->hdcp_content_type ==
+ new_conn_state->hdcp_content_type)
+ return;
+ }
+
+ new_crtc_state->mode_changed = true;
+}
+EXPORT_SYMBOL(drm_hdcp_atomic_check);
diff --git a/drivers/gpu/drm/i915/display/intel_atomic.c
b/drivers/gpu/drm/i915/display/intel_atomic.c
index a9a3f3715279d..e9d00b6a63d39 100644
--- a/drivers/gpu/drm/i915/display/intel_atomic.c
+++ b/drivers/gpu/drm/i915/display/intel_atomic.c
@@ -32,6 +32,7 @@
#include
#include
#include
+#include
#include "i915_drv.h"
#include "i915_reg.h"
@@ -39,7 +40,6 @@
#include "intel_cdclk.h"
#include "intel_display_types.h"
#include "intel_global_state.h"
-#include "intel_hdcp.h"
#include "intel_psr.h"
#include "intel_fb.h"
#include "skl_universal_plane.h"
@@ -124,7 +124,7 @@ int intel_digital_connector_atomic_check(struct
drm_connector *conn,
to_intel_digital_connector_state(old_state);
struct drm_crtc_state *crtc_state;
-
