Re: [Intel-gfx] [PATCH v6 14/15] drm/i915/pxp: black pixels on pxp disabled

Shankar, Uma
2021-08-23T07:57:04Z

> -----Original Message-----
> From: Gupta, Anshuman <anshuman.gupta@intel.com>
> Sent: Thursday, August 12, 2021 1:50 PM
> To: intel-gfx@lists.freedesktop.org
> Cc: Shankar, Uma <uma.shankar@intel.com>; Gupta, Anshuman
> <anshuman.gupta@intel.com>; Ville Syrjälä <ville.syrjala@linux.intel.com>; Gaurav,
> Kumar <kumar.gaurav@intel.com>; Ceraolo Spurio, Daniele
> <daniele.ceraolospurio@intel.com>; Li, Juston <juston.li@intel.com>; Vivi, Rodrigo
> <rodrigo.vivi@intel.com>
> Subject: [PATCH v6 14/15] drm/i915/pxp: black pixels on pxp disabled
>
> When protected sufaces has flipped and pxp session is disabled, display black pixels
> by using plane color CTM correction.
>
> v2:
> - Display black pixels in async flip too.
>
> v3:
> - Removed the black pixels logic for async flip. [Ville]
> - Used plane state to force black pixels. [Ville]
>
> v4 (Daniele): update pxp_is_borked check.
>
> v5: rebase on top of v9 plane decryption moving the decrypt check
> (Juston)

Looks Good to me.
Reviewed-by: Uma Shankar <uma.shankar@intel.com>

> Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
> Cc: Gaurav Kumar <kumar.gaurav@intel.com>
> Cc: Shankar Uma <uma.shankar@intel.com>
> Signed-off-by: Anshuman Gupta <anshuman.gupta@intel.com>
> Signed-off-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
> Signed-off-by: Juston Li <juston.li@intel.com>
> Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
> ---
> drivers/gpu/drm/i915/display/intel_display.c | 12 ++++-
> .../drm/i915/display/intel_display_types.h | 3 ++
> .../drm/i915/display/skl_universal_plane.c | 36 ++++++++++++++-
> drivers/gpu/drm/i915/i915_reg.h | 46 +++++++++++++++++++
> 4 files changed, 94 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/display/intel_display.c
> b/drivers/gpu/drm/i915/display/intel_display.c
> index accdd6614681..c6babb47471e 100644
> --- a/drivers/gpu/drm/i915/display/intel_display.c
> +++ b/drivers/gpu/drm/i915/display/intel_display.c
> @@ -9620,6 +9620,11 @@ static int bo_has_valid_encryption(const struct
> drm_i915_gem_object *obj)
> intel_pxp_is_active(&i915->gt.pxp);
> }
>
> +static bool pxp_is_borked(const struct drm_i915_gem_object *obj) {
> + return i915_gem_object_is_protected(obj) &&
> +!bo_has_valid_encryption(obj); }
> +
> static int intel_atomic_check_planes(struct intel_atomic_state *state) {
> struct drm_i915_private *dev_priv = to_i915(state->base.dev); @@ -
> 9681,10 +9686,13 @@ static int intel_atomic_check_planes(struct
> intel_atomic_state *state)
> new_plane_state = intel_atomic_get_new_plane_state(state,
> plane);
> old_plane_state = intel_atomic_get_old_plane_state(state, plane);
> fb = new_plane_state->hw.fb;
> - if (fb)
> + if (fb) {
> new_plane_state->decrypt =
> bo_has_valid_encryption(intel_fb_obj(fb));
> - else
> + new_plane_state->force_black =
> pxp_is_borked(intel_fb_obj(fb));
> + } else {
> new_plane_state->decrypt = old_plane_state->decrypt;
> + new_plane_state->force_black = old_plane_state-
> >force_black;
> + }
> }
>
> 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 53b5db3c6228..0fe03ef57023 100644
> --- a/drivers/gpu/drm/i915/display/intel_display_types.h
> +++ b/drivers/gpu/drm/i915/display/intel_display_types.h
> @@ -632,6 +632,9 @@ struct intel_plane_state {
> /* Plane pxp decryption state */
> bool decrypt;
>
> + /* Plane state to display black pixels when pxp is borked */
> + bool force_black;
> +
> /* 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 55e3f093b951..c4adcb3e12b3 100644
> --- a/drivers/gpu/drm/i915/display/skl_universal_plane.c
> +++ b/drivers/gpu/drm/i915/display/skl_universal_plane.c
> @@ -1002,6 +1002,33 @@ static u32 skl_surf_address(const struct
> intel_plane_state *plane_state,
> }
> }
>
> +static void intel_load_plane_csc_black(struct intel_plane *intel_plane)
> +{
> + struct drm_i915_private *dev_priv = to_i915(intel_plane->base.dev);
> + enum pipe pipe = intel_plane->pipe;
> + enum plane_id plane = intel_plane->id;
> + u16 postoff = 0;
> +
> + drm_dbg_kms(&dev_priv->drm, "plane color CTM to black %s:%d\n",
> + intel_plane->base.name, plane);
> + intel_de_write_fw(dev_priv, PLANE_CSC_COEFF(pipe, plane, 0), 0);
> + intel_de_write_fw(dev_priv, PLANE_CSC_COEFF(pipe, plane, 1), 0);
> +
> + intel_de_write_fw(dev_priv, PLANE_CSC_COEFF(pipe, plane, 2), 0);
> + intel_de_write_fw(dev_priv, PLANE_CSC_COEFF(pipe, plane, 3), 0);
> +
> + intel_de_write_fw(dev_priv, PLANE_CSC_COEFF(pipe, plane, 4), 0);
> + intel_de_write_fw(dev_priv, PLANE_CSC_COEFF(pipe, plane, 5), 0);
> +
> + intel_de_write_fw(dev_priv, PLANE_CSC_PREOFF(pipe, plane, 0), 0);
> + intel_de_write_fw(dev_priv, PLANE_CSC_PREOFF(pipe, plane, 1), 0);
> + intel_de_write_fw(dev_priv, PLANE_CSC_PREOFF(pipe, plane, 2), 0);
> +
> + intel_de_write_fw(dev_priv, PLANE_CSC_POSTOFF(pipe, plane, 0), postoff);
> + intel_de_write_fw(dev_priv, PLANE_CSC_POSTOFF(pipe, plane, 1), postoff);
> + intel_de_write_fw(dev_priv, PLANE_CSC_POSTOFF(pipe, plane, 2),
> +postoff); }
> +
> static void
> skl_program_plane(struct intel_plane *plane,
> const struct intel_crtc_state *crtc_state, @@ -1115,14 +1142,21
> @@ skl_program_plane(struct intel_plane *plane,
> */
> intel_de_write_fw(dev_priv, PLANE_CTL(pipe, plane_id), plane_ctl);
> plane_surf = intel_plane_ggtt_offset(plane_state) + surf_addr;
> + plane_color_ctl = intel_de_read_fw(dev_priv, PLANE_COLOR_CTL(pipe,
> +plane_id));
>
> /*
> * 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)
> + if (plane_state->decrypt) {
> plane_surf |= PLANE_SURF_DECRYPT;
> + } else if (plane_state->force_black) {
> + intel_load_plane_csc_black(plane);
> + plane_color_ctl |= PLANE_COLOR_PLANE_CSC_ENABLE;
> + }
>
> + intel_de_write_fw(dev_priv, PLANE_COLOR_CTL(pipe, plane_id),
> + plane_color_ctl);
> 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
> 57f22f54d9f7..db714ea91997 100644
> --- a/drivers/gpu/drm/i915/i915_reg.h
> +++ b/drivers/gpu/drm/i915/i915_reg.h
> @@ -7224,6 +7224,7 @@ enum {
> #define _PLANE_COLOR_CTL_3_A 0x703CC /* GLK+ */
> #define PLANE_COLOR_PIPE_GAMMA_ENABLE (1 << 30) /* Pre-ICL */
> #define PLANE_COLOR_YUV_RANGE_CORRECTION_DISABLE (1 << 28)
> +#define PLANE_COLOR_PLANE_CSC_ENABLE REG_BIT(21) /*
> ICL+ */
> #define PLANE_COLOR_INPUT_CSC_ENABLE (1 << 20) /* ICL+ */
> #define PLANE_COLOR_PIPE_CSC_ENABLE (1 << 23) /* Pre-ICL */
> #define PLANE_COLOR_CSC_MODE_BYPASS (0 << 17)
> @@ -11341,6 +11342,51 @@ enum skl_power_gate {
> _PAL_PREC_MULTI_SEG_DATA_A, \
> _PAL_PREC_MULTI_SEG_DATA_B)
>
> +#define _MMIO_PLANE_GAMC(plane, i, a, b) _MMIO(_PIPE(plane, a, b) +
> +(i) * 4)
> +
> +/* Plane CSC Registers */
> +#define _PLANE_CSC_RY_GY_1_A 0x70210
> +#define _PLANE_CSC_RY_GY_2_A 0x70310
> +
> +#define _PLANE_CSC_RY_GY_1_B 0x71210
> +#define _PLANE_CSC_RY_GY_2_B 0x71310
> +
> +#define _PLANE_CSC_RY_GY_1(pipe) _PIPE(pipe, _PLANE_CSC_RY_GY_1_A, \
> + _PLANE_CSC_RY_GY_1_B)
> +#define _PLANE_CSC_RY_GY_2(pipe) _PIPE(pipe,
> _PLANE_INPUT_CSC_RY_GY_2_A, \
> + _PLANE_INPUT_CSC_RY_GY_2_B)
> +#define PLANE_CSC_COEFF(pipe, plane, index) _MMIO_PLANE(plane, \
> +
> _PLANE_CSC_RY_GY_1(pipe) + (index) * 4, \
> +
> _PLANE_CSC_RY_GY_2(pipe) + (index) * 4)
> +
> +#define _PLANE_CSC_PREOFF_HI_1_A 0x70228
> +#define _PLANE_CSC_PREOFF_HI_2_A 0x70328
> +
> +#define _PLANE_CSC_PREOFF_HI_1_B 0x71228
> +#define _PLANE_CSC_PREOFF_HI_2_B 0x71328
> +
> +#define _PLANE_CSC_PREOFF_HI_1(pipe) _PIPE(pipe,
> _PLANE_CSC_PREOFF_HI_1_A, \
> + _PLANE_CSC_PREOFF_HI_1_B)
> +#define _PLANE_CSC_PREOFF_HI_2(pipe) _PIPE(pipe,
> _PLANE_CSC_PREOFF_HI_2_A, \
> + _PLANE_CSC_PREOFF_HI_2_B)
> +#define PLANE_CSC_PREOFF(pipe, plane, index) _MMIO_PLANE(plane,
> _PLANE_CSC_PREOFF_HI_1(pipe) + \
> + (index) * 4,
> _PLANE_CSC_PREOFF_HI_2(pipe) + \
> + (index) * 4)
> +
> +#define _PLANE_CSC_POSTOFF_HI_1_A 0x70234
> +#define _PLANE_CSC_POSTOFF_HI_2_A 0x70334
> +
> +#define _PLANE_CSC_POSTOFF_HI_1_B 0x71234
> +#define _PLANE_CSC_POSTOFF_HI_2_B 0x71334
> +
> +#define _PLANE_CSC_POSTOFF_HI_1(pipe) _PIPE(pipe,
> _PLANE_CSC_POSTOFF_HI_1_A, \
> + _PLANE_CSC_POSTOFF_HI_1_B)
> +#define _PLANE_CSC_POSTOFF_HI_2(pipe) _PIPE(pipe,
> _PLANE_CSC_POSTOFF_HI_2_A, \
> + _PLANE_CSC_POSTOFF_HI_2_B)
> +#define PLANE_CSC_POSTOFF(pipe, plane, index) _MMIO_PLANE(plane,
> _PLANE_CSC_POSTOFF_HI_1(pipe) + \
> + (index) * 4,
> _PLANE_CSC_POSTOFF_HI_2(pipe) + \
> + (index) * 4)
> +
> /* pipe CSC & degamma/gamma LUTs on CHV */
> #define _CGM_PIPE_A_CSC_COEFF01 (VLV_DISPLAY_BASE + 0x67900)
> #define _CGM_PIPE_A_CSC_COEFF23 (VLV_DISPLAY_BASE + 0x67904)
> --
> 2.26.2