Re: [Intel-gfx] [PATCH v2 01/11] drm/i915: Add a table with a descriptor for all i915 modifiers

Imre Deak
2021-10-13T21:01:49Z

On Wed, Oct 13, 2021 at 11:14:42PM +0300, Ville Syrjälä wrote:
> On Fri, Oct 08, 2021 at 03:19:08AM +0300, Imre Deak wrote:
> > Add a table describing all the framebuffer modifiers used by i915 at one
> > place. This has the benefit of deduplicating the listing of supported
> > modifiers for each platform and checking the support of these modifiers
> > on a given plane. This also simplifies in a similar way getting some
> > attribute for a modifier, for instance checking if the modifier is a
> > CCS modifier type.
> >
> > v2:
> > - Keep the plane caps calculation in the plane code and pass an enum
> > with these caps to intel_fb_get_modifiers(). (Ville)
> > - Get the modifiers calling intel_fb_get_modifiers() in i9xx_plane.c as
> > well.
> >
> > Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
> > Signed-off-by: Imre Deak <imre.deak@intel.com>
> > ---
> > drivers/gpu/drm/i915/display/i9xx_plane.c | 30 +--
> > drivers/gpu/drm/i915/display/intel_cursor.c | 19 +-
> > .../drm/i915/display/intel_display_types.h | 1 -
> > drivers/gpu/drm/i915/display/intel_fb.c | 143 ++++++++++++++
> > drivers/gpu/drm/i915/display/intel_fb.h | 16 ++
> > drivers/gpu/drm/i915/display/intel_sprite.c | 35 +---
> > drivers/gpu/drm/i915/display/skl_scaler.c | 1 +
> > .../drm/i915/display/skl_universal_plane.c | 181 +++++-------------
> > drivers/gpu/drm/i915/i915_drv.h | 3 +
> > 9 files changed, 245 insertions(+), 184 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/i915/display/i9xx_plane.c b/drivers/gpu/drm/i915/display/i9xx_plane.c
> > index b1439ba78f67b..a939accff7ee2 100644
> > --- a/drivers/gpu/drm/i915/display/i9xx_plane.c
> > +++ b/drivers/gpu/drm/i915/display/i9xx_plane.c
> > @@ -60,22 +60,11 @@ static const u32 vlv_primary_formats[] = {
> > DRM_FORMAT_XBGR16161616F,
> > };
> >
> > -static const u64 i9xx_format_modifiers[] = {
> > - I915_FORMAT_MOD_X_TILED,
> > - DRM_FORMAT_MOD_LINEAR,
> > - DRM_FORMAT_MOD_INVALID
> > -};
> > -
> > static bool i8xx_plane_format_mod_supported(struct drm_plane *_plane,
> > u32 format, u64 modifier)
> > {
> > - switch (modifier) {
> > - case DRM_FORMAT_MOD_LINEAR:
> > - case I915_FORMAT_MOD_X_TILED:
> > - break;
> > - default:
> > + if (!intel_fb_plane_supports_modifier(to_intel_plane(_plane), modifier))
> > return false;
> > - }
> >
> > switch (format) {
> > case DRM_FORMAT_C8:
> > @@ -92,13 +81,8 @@ static bool i8xx_plane_format_mod_supported(struct drm_plane *_plane,
> > static bool i965_plane_format_mod_supported(struct drm_plane *_plane,
> > u32 format, u64 modifier)
> > {
> > - switch (modifier) {
> > - case DRM_FORMAT_MOD_LINEAR:
> > - case I915_FORMAT_MOD_X_TILED:
> > - break;
> > - default:
> > + if (!intel_fb_plane_supports_modifier(to_intel_plane(_plane), modifier))
> > return false;
> > - }
> >
> > switch (format) {
> > case DRM_FORMAT_C8:
> > @@ -768,6 +752,7 @@ intel_primary_plane_create(struct drm_i915_private *dev_priv, enum pipe pipe)
> > struct intel_plane *plane;
> > const struct drm_plane_funcs *plane_funcs;
> > unsigned int supported_rotations;
> > + const u64 *modifiers;
> > const u32 *formats;
> > int num_formats;
> > int ret, zpos;
> > @@ -875,21 +860,26 @@ intel_primary_plane_create(struct drm_i915_private *dev_priv, enum pipe pipe)
> > plane->disable_flip_done = ilk_primary_disable_flip_done;
> > }
> >
> > + modifiers = intel_fb_plane_get_modifiers(dev_priv, PLANE_HAS_TILING);
> > +
> > if (DISPLAY_VER(dev_priv) >= 5 || IS_G4X(dev_priv))
> > ret = drm_universal_plane_init(&dev_priv->drm, &plane->base,
> > 0, plane_funcs,
> > formats, num_formats,
> > - i9xx_format_modifiers,
> > + modifiers,
> > DRM_PLANE_TYPE_PRIMARY,
> > "primary %c", pipe_name(pipe));
> > else
> > ret = drm_universal_plane_init(&dev_priv->drm, &plane->base,
> > 0, plane_funcs,
> > formats, num_formats,
> > - i9xx_format_modifiers,
> > + modifiers,
> > DRM_PLANE_TYPE_PRIMARY,
> > "plane %c",
> > plane_name(plane->i9xx_plane));
> > +
> > + kfree(modifiers);
> > +
> > if (ret)
> > goto fail;
> >
> > diff --git a/drivers/gpu/drm/i915/display/intel_cursor.c b/drivers/gpu/drm/i915/display/intel_cursor.c
> > index f6dcb5aa63f64..1f764c6d59583 100644
> > --- a/drivers/gpu/drm/i915/display/intel_cursor.c
> > +++ b/drivers/gpu/drm/i915/display/intel_cursor.c
> > @@ -28,11 +28,6 @@ static const u32 intel_cursor_formats[] = {
> > DRM_FORMAT_ARGB8888,
> > };
> >
> > -static const u64 cursor_format_modifiers[] = {
> > - DRM_FORMAT_MOD_LINEAR,
> > - DRM_FORMAT_MOD_INVALID
> > -};
> > -
> > static u32 intel_cursor_base(const struct intel_plane_state *plane_state)
> > {
> > struct drm_i915_private *dev_priv =
> > @@ -605,8 +600,10 @@ static bool i9xx_cursor_get_hw_state(struct intel_plane *plane,
> > static bool intel_cursor_format_mod_supported(struct drm_plane *_plane,
> > u32 format, u64 modifier)
> > {
> > - return modifier == DRM_FORMAT_MOD_LINEAR &&
> > - format == DRM_FORMAT_ARGB8888;
> > + if (!intel_fb_plane_supports_modifier(to_intel_plane(_plane), modifier))
> > + return false;
> > +
> > + return format == DRM_FORMAT_ARGB8888;
> > }
> >
> > static int
> > @@ -754,6 +751,7 @@ intel_cursor_plane_create(struct drm_i915_private *dev_priv,
> > {
> > struct intel_plane *cursor;
> > int ret, zpos;
> > + u64 *modifiers;
> >
> > cursor = intel_plane_alloc();
> > if (IS_ERR(cursor))
> > @@ -784,13 +782,18 @@ intel_cursor_plane_create(struct drm_i915_private *dev_priv,
> > if (IS_I845G(dev_priv) || IS_I865G(dev_priv) || HAS_CUR_FBC(dev_priv))
> > cursor->cursor.size = ~0;
> >
> > + modifiers = intel_fb_plane_get_modifiers(dev_priv, PLANE_HAS_NO_CAPS);
> > +
> > ret = drm_universal_plane_init(&dev_priv->drm, &cursor->base,
> > 0, &intel_cursor_plane_funcs,
> > intel_cursor_formats,
> > ARRAY_SIZE(intel_cursor_formats),
> > - cursor_format_modifiers,
> > + modifiers,
> > DRM_PLANE_TYPE_CURSOR,
> > "cursor %c", pipe_name(pipe));
> > +
> > + kfree(modifiers);
> > +
> > if (ret)
> > goto fail;
> >
> > diff --git a/drivers/gpu/drm/i915/display/intel_display_types.h b/drivers/gpu/drm/i915/display/intel_display_types.h
> > index 21ce8bccc645a..bb53b01f07aee 100644
> > --- a/drivers/gpu/drm/i915/display/intel_display_types.h
> > +++ b/drivers/gpu/drm/i915/display/intel_display_types.h
> > @@ -1336,7 +1336,6 @@ struct intel_plane {
> > enum plane_id id;
> > enum pipe pipe;
> > bool has_fbc;
> > - bool has_ccs;
> > bool need_async_flip_disable_wa;
> > u32 frontbuffer_bit;
> >
> > diff --git a/drivers/gpu/drm/i915/display/intel_fb.c b/drivers/gpu/drm/i915/display/intel_fb.c
> > index fa1f375e696bf..11a4c3e81cead 100644
> > --- a/drivers/gpu/drm/i915/display/intel_fb.c
> > +++ b/drivers/gpu/drm/i915/display/intel_fb.c
> > @@ -13,6 +13,149 @@
> >
> > #define check_array_bounds(i915, a, i) drm_WARN_ON(&(i915)->drm, (i) >= ARRAY_SIZE(a))
> >
> > +const struct intel_modifier_desc {
> > + u64 id;
>
> s/id/modifier/ ?

Ok.

> > + u64 display_versions;
> > + u8 is_linear:1;
> > +
> > + struct {
> > +#define INTEL_CCS_RC BIT(0)
> > +#define INTEL_CCS_RC_CC BIT(1)
> > +#define INTEL_CCS_MC BIT(2)
> > +
> > +#define INTEL_CCS_ANY (INTEL_CCS_RC | INTEL_CCS_RC_CC | INTEL_CCS_MC)
> > + u8 type:3;
> > + } ccs;
> > +} intel_modifiers[] = {
> > + {
> > + .id = DRM_FORMAT_MOD_LINEAR,
> > + .display_versions = DISPLAY_VER_MASK_ALL,
> > + .is_linear = true,
> > + },
> > + {
> > + .id = I915_FORMAT_MOD_X_TILED,
> > + .display_versions = DISPLAY_VER_MASK_ALL,
> > + },
> > + {
> > + .id = I915_FORMAT_MOD_Y_TILED,
> > + .display_versions = DISPLAY_VER_MASK(9, 13),
> > + },
> > + {
> > + .id = I915_FORMAT_MOD_Yf_TILED,
> > + .display_versions = DISPLAY_VER_MASK(9, 11),
> > + },
> > + {
> > + .id = I915_FORMAT_MOD_Y_TILED_CCS,
> > + .display_versions = DISPLAY_VER_MASK(9, 11),
> > +
> > + .ccs.type = INTEL_CCS_RC,
> > + },
> > + {
> > + .id = I915_FORMAT_MOD_Yf_TILED_CCS,
> > + .display_versions = DISPLAY_VER_MASK(9, 11),
> > +
> > + .ccs.type = INTEL_CCS_RC,
> > + },
> > + {
> > + .id = I915_FORMAT_MOD_Y_TILED_GEN12_RC_CCS,
> > + .display_versions = DISPLAY_VER_MASK(12, 13),
> > +
> > + .ccs.type = INTEL_CCS_RC,
> > + },
> > + {
> > + .id = I915_FORMAT_MOD_Y_TILED_GEN12_RC_CCS_CC,
> > + .display_versions = DISPLAY_VER_MASK(12, 13),
> > +
> > + .ccs.type = INTEL_CCS_RC_CC,
> > + },
> > + {
> > + .id = I915_FORMAT_MOD_Y_TILED_GEN12_MC_CCS,
> > + .display_versions = DISPLAY_VER_MASK(12, 13),
> > +
> > + .ccs.type = INTEL_CCS_MC,
> > + },
> > +};
> > +
> > +static bool is_ccs_type_modifier(const struct intel_modifier_desc *md, u8 ccs_type)
> > +{
> > + return md->ccs.type & ccs_type;
> > +}
> > +
> > +static bool plane_has_modifier(struct drm_i915_private *i915,
> > + enum intel_plane_caps plane_caps,
> > + const struct intel_modifier_desc *md)
> > +{
> > + if (!(DISPLAY_VER_BIT(DISPLAY_VER(i915)) & md->display_versions))
> > + return false;
>
> I guess I'd typically have the bitmask vs. the bit we're checking
> the other way around. Feels a bit RPN :P

Yes, will fix it.

> > +
> > + if (!(plane_caps & PLANE_HAS_TILING) && !md->is_linear)
> > + return false;
>
> This has the plane_caps part on the left of && ...
>
> > +
> > + if (is_ccs_type_modifier(md, INTEL_CCS_RC | INTEL_CCS_RC_CC) &&
> > + !(plane_caps & PLANE_HAS_CCS_RC))
> > + return false;
> > +
> > + if (is_ccs_type_modifier(md, INTEL_CCS_MC) &&
> > + !(plane_caps & PLANE_HAS_CCS_MC))
> > + return false;
>
> ...these have it on the right.
>
> My poor brain would like things to be consistent ;a

Yep, makes sense, will make the conditions more uniform.

>
> > +
> > + return true;
> > +}
> > +
> > +/**
> > + * intel_fb_plane_get_modifiers: Get the modifiers supported by the given pipe and plane
> > + * @i915: i915 device instance
> > + * @plane_caps: capabilities for the plane the modifiers are queried for
> > + *
> > + * Returns:
> > + * Returns the list of modifiers as allowed by @plane_caps.
> > + * The caller must free the returned buffer.
> > + */
> > +u64 *intel_fb_plane_get_modifiers(struct drm_i915_private *i915,
> > + enum intel_plane_caps plane_caps)
> > +{
> > + u64 *list, *p;
> > + int count = 1; /* +1 for invalid modifier terminator */
> > + int i;
> > +
> > + for (i = 0; i < ARRAY_SIZE(intel_modifiers); i++) {
> > + if (plane_has_modifier(i915, plane_caps, &intel_modifiers[i]))
> > + count++;
> > + }
> > +
> > + list = kmalloc_array(count, sizeof(*list), GFP_KERNEL);
> > + if (drm_WARN_ON(&i915->drm, !list))
> > + return NULL;
> > +
> > + p = list;
> > + for (i = 0; i < ARRAY_SIZE(intel_modifiers); i++) {
> > + if (plane_has_modifier(i915, plane_caps, &intel_modifiers[i]))
> > + *p++ = intel_modifiers[i].id;
> > + }
> > + *p++ = DRM_FORMAT_MOD_INVALID;
> > +
> > + return list;
> > +}
> > +
> > +/**
> > + * intel_fb_plane_supports_modifier: Determine if a modifier is supported by the given plane
> > + * @plane: Plane to check the modifier support for
> > + * @modifier: The modifier to check the support for
> > + *
> > + * Returns:
> > + * %true if the @modifier is supported on @plane.
> > + */
> > +bool intel_fb_plane_supports_modifier(struct intel_plane *plane, u64 modifier)
> > +{
> > + int i;
> > +
> > + for (i = 0; i < plane->base.modifier_count; i++)
> > + if (plane->base.modifiers[i] == modifier)
> > + return true;
> > +
> > + return false;
> > +}
> > +
> > bool is_ccs_plane(const struct drm_framebuffer *fb, int plane)
> > {
> > if (!is_ccs_modifier(fb->modifier))
> > diff --git a/drivers/gpu/drm/i915/display/intel_fb.h b/drivers/gpu/drm/i915/display/intel_fb.h
> > index 1cbdd84502bdd..5bff88ccb9372 100644
> > --- a/drivers/gpu/drm/i915/display/intel_fb.h
> > +++ b/drivers/gpu/drm/i915/display/intel_fb.h
> > @@ -6,8 +6,12 @@
> > #ifndef __INTEL_FB_H__
> > #define __INTEL_FB_H__
> >
> > +#include <linux/bits.h>
> > #include <linux/types.h>
> >
> > +enum pipe;
> > +enum plane_id;
> > +
> > struct drm_device;
> > struct drm_file;
> > struct drm_framebuffer;
> > @@ -16,13 +20,25 @@ struct drm_i915_private;
> > struct drm_mode_fb_cmd2;
> > struct intel_fb_view;
> > struct intel_framebuffer;
> > +struct intel_plane;
> > struct intel_plane_state;
> >
> > +enum intel_plane_caps {
> > + PLANE_HAS_NO_CAPS = 0,
> > + PLANE_HAS_TILING = BIT(0),
> > + PLANE_HAS_CCS_RC = BIT(1),
> > + PLANE_HAS_CCS_MC = BIT(2),
> > +};
> > +
> > bool is_ccs_plane(const struct drm_framebuffer *fb, int plane);
> > bool is_gen12_ccs_plane(const struct drm_framebuffer *fb, int plane);
> > bool is_gen12_ccs_cc_plane(const struct drm_framebuffer *fb, int plane);
> > bool is_semiplanar_uv_plane(const struct drm_framebuffer *fb, int color_plane);
> >
> > +u64 *intel_fb_plane_get_modifiers(struct drm_i915_private *i915,
> > + enum intel_plane_caps plane_caps);
> > +bool intel_fb_plane_supports_modifier(struct intel_plane *plane, u64 modifier);
> > +
> > bool is_surface_linear(const struct drm_framebuffer *fb, int color_plane);
> >
> > int main_to_ccs_plane(const struct drm_framebuffer *fb, int main_plane);
> > diff --git a/drivers/gpu/drm/i915/display/intel_sprite.c b/drivers/gpu/drm/i915/display/intel_sprite.c
> > index 08116f41da26a..2f4f47ab9da03 100644
> > --- a/drivers/gpu/drm/i915/display/intel_sprite.c
> > +++ b/drivers/gpu/drm/i915/display/intel_sprite.c
> > @@ -45,6 +45,7 @@
> > #include "intel_atomic_plane.h"
> > #include "intel_de.h"
> > #include "intel_display_types.h"
> > +#include "intel_fb.h"
> > #include "intel_frontbuffer.h"
> > #include "intel_sprite.h"
> > #include "i9xx_plane.h"
> > @@ -1575,12 +1576,6 @@ static const u32 g4x_plane_formats[] = {
> > DRM_FORMAT_VYUY,
> > };
> >
> > -static const u64 i9xx_plane_format_modifiers[] = {
> > - I915_FORMAT_MOD_X_TILED,
> > - DRM_FORMAT_MOD_LINEAR,
> > - DRM_FORMAT_MOD_INVALID
> > -};
> > -
> > static const u32 snb_plane_formats[] = {
> > DRM_FORMAT_XRGB8888,
> > DRM_FORMAT_XBGR8888,
> > @@ -1629,13 +1624,8 @@ static const u32 chv_pipe_b_sprite_formats[] = {
> > static bool g4x_sprite_format_mod_supported(struct drm_plane *_plane,
> > u32 format, u64 modifier)
> > {
> > - switch (modifier) {
> > - case DRM_FORMAT_MOD_LINEAR:
> > - case I915_FORMAT_MOD_X_TILED:
> > - break;
> > - default:
> > + if (!intel_fb_plane_supports_modifier(to_intel_plane(_plane), modifier))
> > return false;
> > - }
> >
> > switch (format) {
> > case DRM_FORMAT_XRGB8888:
> > @@ -1655,13 +1645,8 @@ static bool g4x_sprite_format_mod_supported(struct drm_plane *_plane,
> > static bool snb_sprite_format_mod_supported(struct drm_plane *_plane,
> > u32 format, u64 modifier)
> > {
> > - switch (modifier) {
> > - case DRM_FORMAT_MOD_LINEAR:
> > - case I915_FORMAT_MOD_X_TILED:
> > - break;
> > - default:
> > + if (!intel_fb_plane_supports_modifier(to_intel_plane(_plane), modifier))
> > return false;
> > - }
> >
> > switch (format) {
> > case DRM_FORMAT_XRGB8888:
> > @@ -1686,13 +1671,8 @@ static bool snb_sprite_format_mod_supported(struct drm_plane *_plane,
> > static bool vlv_sprite_format_mod_supported(struct drm_plane *_plane,
> > u32 format, u64 modifier)
> > {
> > - switch (modifier) {
> > - case DRM_FORMAT_MOD_LINEAR:
> > - case I915_FORMAT_MOD_X_TILED:
> > - break;
> > - default:
> > + if (!intel_fb_plane_supports_modifier(to_intel_plane(_plane), modifier))
> > return false;
> > - }
> >
> > switch (format) {
> > case DRM_FORMAT_C8:
> > @@ -1776,7 +1756,6 @@ intel_sprite_plane_create(struct drm_i915_private *dev_priv,
> > formats = vlv_plane_formats;
> > num_formats = ARRAY_SIZE(vlv_plane_formats);
> > }
> > - modifiers = i9xx_plane_format_modifiers;
> >
> > plane_funcs = &vlv_sprite_funcs;
> > } else if (DISPLAY_VER(dev_priv) >= 7) {
> > @@ -1795,7 +1774,6 @@ intel_sprite_plane_create(struct drm_i915_private *dev_priv,
> >
> > formats = snb_plane_formats;
> > num_formats = ARRAY_SIZE(snb_plane_formats);
> > - modifiers = i9xx_plane_format_modifiers;
> >
> > plane_funcs = &snb_sprite_funcs;
> > } else {
> > @@ -1806,7 +1784,6 @@ intel_sprite_plane_create(struct drm_i915_private *dev_priv,
> > plane->max_stride = g4x_sprite_max_stride;
> > plane->min_cdclk = g4x_sprite_min_cdclk;
> >
> > - modifiers = i9xx_plane_format_modifiers;
> > if (IS_SANDYBRIDGE(dev_priv)) {
> > formats = snb_plane_formats;
> > num_formats = ARRAY_SIZE(snb_plane_formats);
> > @@ -1833,11 +1810,15 @@ intel_sprite_plane_create(struct drm_i915_private *dev_priv,
> > plane->id = PLANE_SPRITE0 + sprite;
> > plane->frontbuffer_bit = INTEL_FRONTBUFFER(pipe, plane->id);
> >
> > + modifiers = intel_fb_plane_get_modifiers(dev_priv, PLANE_HAS_TILING);
> > +
> > ret = drm_universal_plane_init(&dev_priv->drm, &plane->base,
> > 0, plane_funcs,
> > formats, num_formats, modifiers,
> > DRM_PLANE_TYPE_OVERLAY,
> > "sprite %c", sprite_name(pipe, sprite));
> > + kfree(modifiers);
> > +
> > if (ret)
> > goto fail;
> >
> > diff --git a/drivers/gpu/drm/i915/display/skl_scaler.c b/drivers/gpu/drm/i915/display/skl_scaler.c
> > index 37eabeff8197f..c2e94118566b6 100644
> > --- a/drivers/gpu/drm/i915/display/skl_scaler.c
> > +++ b/drivers/gpu/drm/i915/display/skl_scaler.c
> > @@ -4,6 +4,7 @@
> > */
> > #include "intel_de.h"
> > #include "intel_display_types.h"
> > +#include "intel_fb.h"
> > #include "skl_scaler.h"
> > #include "skl_universal_plane.h"
> >
> > diff --git a/drivers/gpu/drm/i915/display/skl_universal_plane.c b/drivers/gpu/drm/i915/display/skl_universal_plane.c
> > index a0e53a3b267aa..908eb87d9cf8f 100644
> > --- a/drivers/gpu/drm/i915/display/skl_universal_plane.c
> > +++ b/drivers/gpu/drm/i915/display/skl_universal_plane.c
> > @@ -163,50 +163,6 @@ static const u32 icl_hdr_plane_formats[] = {
> > DRM_FORMAT_XVYU16161616,
> > };
> >
> > -static const u64 skl_plane_format_modifiers_noccs[] = {
> > - I915_FORMAT_MOD_Yf_TILED,
> > - I915_FORMAT_MOD_Y_TILED,
> > - I915_FORMAT_MOD_X_TILED,
> > - DRM_FORMAT_MOD_LINEAR,
> > - DRM_FORMAT_MOD_INVALID
> > -};
> > -
> > -static const u64 skl_plane_format_modifiers_ccs[] = {
> > - I915_FORMAT_MOD_Yf_TILED_CCS,
> > - I915_FORMAT_MOD_Y_TILED_CCS,
> > - I915_FORMAT_MOD_Yf_TILED,
> > - I915_FORMAT_MOD_Y_TILED,
> > - I915_FORMAT_MOD_X_TILED,
> > - DRM_FORMAT_MOD_LINEAR,
> > - DRM_FORMAT_MOD_INVALID
> > -};
> > -
> > -static const u64 gen12_plane_format_modifiers_mc_ccs[] = {
> > - I915_FORMAT_MOD_Y_TILED_GEN12_MC_CCS,
> > - I915_FORMAT_MOD_Y_TILED_GEN12_RC_CCS,
> > - I915_FORMAT_MOD_Y_TILED_GEN12_RC_CCS_CC,
> > - I915_FORMAT_MOD_Y_TILED,
> > - I915_FORMAT_MOD_X_TILED,
> > - DRM_FORMAT_MOD_LINEAR,
> > - DRM_FORMAT_MOD_INVALID
> > -};
> > -
> > -static const u64 gen12_plane_format_modifiers_rc_ccs[] = {
> > - I915_FORMAT_MOD_Y_TILED_GEN12_RC_CCS,
> > - I915_FORMAT_MOD_Y_TILED_GEN12_RC_CCS_CC,
> > - I915_FORMAT_MOD_Y_TILED,
> > - I915_FORMAT_MOD_X_TILED,
> > - DRM_FORMAT_MOD_LINEAR,
> > - DRM_FORMAT_MOD_INVALID
> > -};
> > -
> > -static const u64 adlp_step_a_plane_format_modifiers[] = {
> > - I915_FORMAT_MOD_Y_TILED,
> > - I915_FORMAT_MOD_X_TILED,
> > - DRM_FORMAT_MOD_LINEAR,
> > - DRM_FORMAT_MOD_INVALID
> > -};
> > -
> > int skl_format_to_fourcc(int format, bool rgb_order, bool alpha)
> > {
> > switch (format) {
> > @@ -1870,42 +1826,13 @@ static const u32 *icl_get_plane_formats(struct drm_i915_private *dev_priv,
> > }
> > }
> >
> > -static bool skl_plane_has_ccs(struct drm_i915_private *dev_priv,
> > - enum pipe pipe, enum plane_id plane_id)
> > -{
> > - if (plane_id == PLANE_CURSOR)
> > - return false;
> > -
> > - if (DISPLAY_VER(dev_priv) >= 11)
> > - return true;
> > -
> > - if (IS_GEMINILAKE(dev_priv))
> > - return pipe != PIPE_C;
> > -
> > - return pipe != PIPE_C &&
> > - (plane_id == PLANE_PRIMARY ||
> > - plane_id == PLANE_SPRITE0);
> > -}
> > -
> > static bool skl_plane_format_mod_supported(struct drm_plane *_plane,
> > u32 format, u64 modifier)
> > {
> > struct intel_plane *plane = to_intel_plane(_plane);
> >
> > - switch (modifier) {
> > - case DRM_FORMAT_MOD_LINEAR:
> > - case I915_FORMAT_MOD_X_TILED:
> > - case I915_FORMAT_MOD_Y_TILED:
> > - case I915_FORMAT_MOD_Yf_TILED:
> > - break;
> > - case I915_FORMAT_MOD_Y_TILED_CCS:
> > - case I915_FORMAT_MOD_Yf_TILED_CCS:
> > - if (!plane->has_ccs)
> > - return false;
> > - break;
> > - default:
> > + if (!intel_fb_plane_supports_modifier(plane, modifier))
> > return false;
> > - }
> >
> > switch (format) {
> > case DRM_FORMAT_XRGB8888:
> > @@ -1953,45 +1880,13 @@ static bool skl_plane_format_mod_supported(struct drm_plane *_plane,
> > }
> > }
> >
> > -static bool gen12_plane_supports_mc_ccs(struct drm_i915_private *dev_priv,
> > - enum plane_id plane_id)
> > -{
> > - /* Wa_14010477008:tgl[a0..c0],rkl[all],dg1[all] */
> > - if (IS_DG1(dev_priv) || IS_ROCKETLAKE(dev_priv) ||
> > - IS_TGL_DISPLAY_STEP(dev_priv, STEP_A0, STEP_D0))
> > - return false;
> > -
> > - /* Wa_22011186057 */
> > - if (IS_ADLP_DISPLAY_STEP(dev_priv, STEP_A0, STEP_B0))
> > - return false;
> > -
> > - return plane_id < PLANE_SPRITE4;
> > -}
> > -
> > static bool gen12_plane_format_mod_supported(struct drm_plane *_plane,
> > u32 format, u64 modifier)
> > {
> > - struct drm_i915_private *dev_priv = to_i915(_plane->dev);
> > struct intel_plane *plane = to_intel_plane(_plane);
> >
> > - switch (modifier) {
> > - case I915_FORMAT_MOD_Y_TILED_GEN12_MC_CCS:
> > - if (!gen12_plane_supports_mc_ccs(dev_priv, plane->id))
> > - return false;
> > - fallthrough;
> > - case DRM_FORMAT_MOD_LINEAR:
> > - case I915_FORMAT_MOD_X_TILED:
> > - case I915_FORMAT_MOD_Y_TILED:
> > - break;
> > - case I915_FORMAT_MOD_Y_TILED_GEN12_RC_CCS:
> > - case I915_FORMAT_MOD_Y_TILED_GEN12_RC_CCS_CC:
> > - /* Wa_22011186057 */
> > - if (IS_ADLP_DISPLAY_STEP(dev_priv, STEP_A0, STEP_B0))
> > - return false;
> > - break;
> > - default:
> > + if (!intel_fb_plane_supports_modifier(plane, modifier))
> > return false;
> > - }
> >
> > switch (format) {
> > case DRM_FORMAT_XRGB8888:
> > @@ -2039,18 +1934,6 @@ static bool gen12_plane_format_mod_supported(struct drm_plane *_plane,
> > }
> > }
> >
> > -static const u64 *gen12_get_plane_modifiers(struct drm_i915_private *dev_priv,
> > - enum plane_id plane_id)
> > -{
> > - /* Wa_22011186057 */
> > - if (IS_ADLP_DISPLAY_STEP(dev_priv, STEP_A0, STEP_B0))
> > - return adlp_step_a_plane_format_modifiers;
> > - else if (gen12_plane_supports_mc_ccs(dev_priv, plane_id))
> > - return gen12_plane_format_modifiers_mc_ccs;
> > - else
> > - return gen12_plane_format_modifiers_rc_ccs;
> > -}
> > -
> > static const struct drm_plane_funcs skl_plane_funcs = {
> > .update_plane = drm_atomic_helper_update_plane,
> > .disable_plane = drm_atomic_helper_disable_plane,
> > @@ -2091,6 +1974,42 @@ skl_plane_disable_flip_done(struct intel_plane *plane)
> > spin_unlock_irq(&i915->irq_lock);
> > }
> >
> > +static bool skl_plane_has_rc_ccs(struct drm_i915_private *i915,
> > + enum pipe pipe, enum plane_id plane_id)
> > +{
> > + if (plane_id == PLANE_CURSOR)
> > + return false;
> > +
>
> No cursors here anyway.

Right, it's a copy/paste, but realize now that the cursor plane is
registered separately. Will drop this.

>
> > + /* Wa_22011186057 */
> > + if (IS_ADLP_DISPLAY_STEP(i915, STEP_A0, STEP_B0))
> > + return false;
> > +
> > + if (DISPLAY_VER(i915) >= 11)
> > + return true;
> > +
> > + if (IS_GEMINILAKE(i915))
> > + return pipe != PIPE_C;
> > +
> > + return pipe != PIPE_C &&
> > + (plane_id == PLANE_PRIMARY ||
> > + plane_id == PLANE_SPRITE0);
> > +}
>
> A bit tempted to say we should chop this up into more
> platform specific variants. But that can be left for later I guess.

You mean clarifying that last check is for SKL/BXT? Would a code comment
be ok?

> > +
> > +static bool gen12_plane_has_mc_ccs(struct drm_i915_private *i915,
> > + enum plane_id plane_id)
> > +{
> > + /* Wa_14010477008:tgl[a0..c0],rkl[all],dg1[all] */
> > + if (IS_DG1(i915) || IS_ROCKETLAKE(i915) ||
> > + IS_TGL_DISPLAY_STEP(i915, STEP_A0, STEP_D0))
> > + return false;
> > +
> > + /* Wa_22011186057 */
> > + if (IS_ADLP_DISPLAY_STEP(i915, STEP_A0, STEP_B0))
> > + return false;
> > +
> > + return plane_id < PLANE_SPRITE4;
> > +}
> > +
> > struct intel_plane *
> > skl_universal_plane_create(struct drm_i915_private *dev_priv,
> > enum pipe pipe, enum plane_id plane_id)
> > @@ -2098,6 +2017,7 @@ skl_universal_plane_create(struct drm_i915_private *dev_priv,
> > const struct drm_plane_funcs *plane_funcs;
> > struct intel_plane *plane;
> > enum drm_plane_type plane_type;
> > + enum intel_plane_caps plane_caps;
> > unsigned int supported_rotations;
> > unsigned int supported_csc;
> > const u64 *modifiers;
> > @@ -2159,29 +2079,34 @@ skl_universal_plane_create(struct drm_i915_private *dev_priv,
> > formats = skl_get_plane_formats(dev_priv, pipe,
> > plane_id, &num_formats);
> >
> > - plane->has_ccs = skl_plane_has_ccs(dev_priv, pipe, plane_id);
> > - if (DISPLAY_VER(dev_priv) >= 12) {
> > - modifiers = gen12_get_plane_modifiers(dev_priv, plane_id);
> > + if (DISPLAY_VER(dev_priv) >= 12)
> > plane_funcs = &gen12_plane_funcs;
> > - } else {
> > - if (plane->has_ccs)
> > - modifiers = skl_plane_format_modifiers_ccs;
> > - else
> > - modifiers = skl_plane_format_modifiers_noccs;
> > + else
> > plane_funcs = &skl_plane_funcs;
> > - }
> >
> > if (plane_id == PLANE_PRIMARY)
> > plane_type = DRM_PLANE_TYPE_PRIMARY;
> > else
> > plane_type = DRM_PLANE_TYPE_OVERLAY;
> >
> > + plane_caps = PLANE_HAS_TILING;
> > + if (skl_plane_has_rc_ccs(dev_priv, pipe, plane_id))
> > + plane_caps |= PLANE_HAS_CCS_RC;
> > +
> > + if (gen12_plane_has_mc_ccs(dev_priv, plane_id))
> > + plane_caps |= PLANE_HAS_CCS_MC;
> > +
> > + modifiers = intel_fb_plane_get_modifiers(dev_priv, plane_caps);
> > +
> > ret = drm_universal_plane_init(&dev_priv->drm, &plane->base,
> > 0, plane_funcs,
> > formats, num_formats, modifiers,
> > plane_type,
> > "plane %d%c", plane_id + 1,
> > pipe_name(pipe));
> > +
> > + kfree(modifiers);
> > +
> > if (ret)
> > goto fail;
> >
> > diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
> > index 12256218634f4..a92228c922a54 100644
> > --- a/drivers/gpu/drm/i915/i915_drv.h
> > +++ b/drivers/gpu/drm/i915/i915_drv.h
> > @@ -1342,6 +1342,9 @@ static inline struct drm_i915_private *pdev_to_i915(struct pci_dev *pdev)
> > #define DISPLAY_VER(i915) (INTEL_INFO(i915)->display.ver)
> > #define IS_DISPLAY_VER(i915, from, until) \
> > (DISPLAY_VER(i915) >= (from) && DISPLAY_VER(i915) <= (until))
> > +#define DISPLAY_VER_BIT(d) BIT_ULL(d)
> > +#define DISPLAY_VER_MASK(f, u) GENMASK_ULL(u, f)
> > +#define DISPLAY_VER_MASK_ALL DISPLAY_VER_MASK(0, BITS_PER_LONG_LONG - 1)
> >
> > #define INTEL_REVID(dev_priv) (to_pci_dev((dev_priv)->drm.dev)->revision)
> >
> > --
> > 2.27.0
>
> --
> Ville Syrjälä
> Intel