From: Anshuman Gupta anshuman.gupta@intel.com
Add support to enable/disable PLANE_SURF Decryption Request bit. It requires only to enable plane decryption support when following condition met. 1. PXP session is enabled. 2. Buffer object is protected.
v2: - Used gen fb obj user_flags instead gem_object_metadata. [Krishna]
v3: - intel_pxp_gem_object_status() API changes.
v4: use intel_pxp_is_active (Daniele)
v5: rebase and use the new protected object status checker (Daniele)
v6: used plane state for plane_decryption to handle async flip as suggested by Ville.
v7: check pxp session while plane decrypt state computation. [Ville] removed pointless code. [Ville]
v8 (Daniele): update PXP check
Cc: Bommu Krishnaiah krishnaiah.bommu@intel.com Cc: Huang Sean Z sean.z.huang@intel.com Cc: Gaurav Kumar kumar.gaurav@intel.com Cc: Ville Syrjälä ville.syrjala@linux.intel.com Signed-off-by: Anshuman Gupta anshuman.gupta@intel.com Signed-off-by: Daniele Ceraolo Spurio daniele.ceraolospurio@intel.com Reviewed-by: Rodrigo Vivi rodrigo.vivi@intel.com --- .../gpu/drm/i915/display/intel_atomic_plane.c | 16 ++++++++++++++++ drivers/gpu/drm/i915/display/intel_display.c | 4 ++++ .../gpu/drm/i915/display/intel_display_types.h | 3 +++ .../gpu/drm/i915/display/skl_universal_plane.c | 15 ++++++++++++--- drivers/gpu/drm/i915/i915_reg.h | 1 + 5 files changed, 36 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/i915/display/intel_atomic_plane.c b/drivers/gpu/drm/i915/display/intel_atomic_plane.c index 47234d898549..3f605a666ea8 100644 --- a/drivers/gpu/drm/i915/display/intel_atomic_plane.c +++ b/drivers/gpu/drm/i915/display/intel_atomic_plane.c @@ -41,6 +41,7 @@ #include "intel_display_types.h" #include "intel_pm.h" #include "intel_sprite.h" +#include "pxp/intel_pxp.h"
static void intel_plane_state_reset(struct intel_plane_state *plane_state, struct intel_plane *plane) @@ -383,6 +384,14 @@ intel_crtc_get_plane(struct intel_crtc *crtc, enum plane_id plane_id) return NULL; }
+static int bo_has_valid_encryption(const struct drm_i915_gem_object *obj) +{ + struct drm_i915_private *i915 = to_i915(obj->base.dev); + + return i915_gem_object_has_valid_protection(obj) && + intel_pxp_is_active(&i915->gt.pxp); +} + int intel_plane_atomic_check(struct intel_atomic_state *state, struct intel_plane *plane) { @@ -397,6 +406,7 @@ int intel_plane_atomic_check(struct intel_atomic_state *state, intel_atomic_get_old_crtc_state(state, crtc); struct intel_crtc_state *new_crtc_state = intel_atomic_get_new_crtc_state(state, crtc); + const struct drm_framebuffer *fb;
if (new_crtc_state && new_crtc_state->bigjoiner_slave) { struct intel_plane *master_plane = @@ -413,6 +423,12 @@ int intel_plane_atomic_check(struct intel_atomic_state *state, new_master_plane_state, crtc);
+ fb = new_plane_state->hw.fb; + if (fb) + new_plane_state->decrypt = bo_has_valid_encryption(intel_fb_obj(fb)); + else + new_plane_state->decrypt = old_plane_state->decrypt; + new_plane_state->uapi.visible = false; if (!new_crtc_state) return 0; diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c index 65ddb6ca16e6..c10026bc01fb 100644 --- a/drivers/gpu/drm/i915/display/intel_display.c +++ b/drivers/gpu/drm/i915/display/intel_display.c @@ -9815,6 +9815,10 @@ static int intel_atomic_check_async(struct intel_atomic_state *state) drm_dbg_kms(&i915->drm, "Color range cannot be changed in async flip\n"); return -EINVAL; } + + /* plane decryption is allow to change only in synchronous flips */ + if (old_plane_state->decrypt != new_plane_state->decrypt) + return -EINVAL; }
return 0; diff --git a/drivers/gpu/drm/i915/display/intel_display_types.h b/drivers/gpu/drm/i915/display/intel_display_types.h index d94f361b548b..beb271a5c8bc 100644 --- a/drivers/gpu/drm/i915/display/intel_display_types.h +++ b/drivers/gpu/drm/i915/display/intel_display_types.h @@ -625,6 +625,9 @@ struct intel_plane_state {
struct intel_fb_view view;
+ /* Plane pxp decryption state */ + bool decrypt; + /* plane control register */ u32 ctl;
diff --git a/drivers/gpu/drm/i915/display/skl_universal_plane.c b/drivers/gpu/drm/i915/display/skl_universal_plane.c index 628b678d9a71..454b699bd177 100644 --- a/drivers/gpu/drm/i915/display/skl_universal_plane.c +++ b/drivers/gpu/drm/i915/display/skl_universal_plane.c @@ -18,6 +18,7 @@ #include "intel_sprite.h" #include "skl_scaler.h" #include "skl_universal_plane.h" +#include "pxp/intel_pxp.h"
static const u32 skl_plane_formats[] = { DRM_FORMAT_C8, @@ -1024,7 +1025,7 @@ skl_program_plane(struct intel_plane *plane, u8 alpha = plane_state->hw.alpha >> 8; u32 plane_color_ctl = 0, aux_dist = 0; unsigned long irqflags; - u32 keymsk, keymax; + u32 keymsk, keymax, plane_surf; u32 plane_ctl = plane_state->ctl;
plane_ctl |= skl_plane_ctl_crtc(crtc_state); @@ -1113,8 +1114,16 @@ skl_program_plane(struct intel_plane *plane, * the control register just before the surface register. */ intel_de_write_fw(dev_priv, PLANE_CTL(pipe, plane_id), plane_ctl); - intel_de_write_fw(dev_priv, PLANE_SURF(pipe, plane_id), - intel_plane_ggtt_offset(plane_state) + surf_addr); + plane_surf = intel_plane_ggtt_offset(plane_state) + surf_addr; + + /* + * FIXME: pxp session invalidation can hit any time even at time of commit + * or after the commit, display content will be garbage. + */ + if (plane_state->decrypt) + plane_surf |= PLANE_SURF_DECRYPT; + + intel_de_write_fw(dev_priv, PLANE_SURF(pipe, plane_id), plane_surf);
spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags); } diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index 2c583f2d410d..5d89556f8b0c 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -7310,6 +7310,7 @@ enum { #define _PLANE_SURF_3(pipe) _PIPE(pipe, _PLANE_SURF_3_A, _PLANE_SURF_3_B) #define PLANE_SURF(pipe, plane) \ _MMIO_PLANE(plane, _PLANE_SURF_1(pipe), _PLANE_SURF_2(pipe)) +#define PLANE_SURF_DECRYPT REG_BIT(2)
#define _PLANE_OFFSET_1_B 0x711a4 #define _PLANE_OFFSET_2_B 0x712a4