[PATCHv2 5/5] drm/i915/skl: Add support for blending modes

Vandita Kulkarni
2016-04-26T09:33:49Z

From: Damien Lespiau <damien.lespiau@intel.com>

This patch adds support for blending modes involving
color.

V2: Add support for primary plane.
Separate out plane alpha disable functionality from per pixel
drop_alpha blend function and add another blend function case for
disabling plane alpha.

Signed-off-by: Damien Lespiau <damien.lespiau@intel.com>
Signed-off-by: vandita kulkarni <vandita.kulkarni@intel.com>
---
drivers/gpu/drm/i915/i915_reg.h | 4 +++
drivers/gpu/drm/i915/intel_display.c | 47 ++++++++++++++++++++++++++++++++++++
drivers/gpu/drm/i915/intel_drv.h | 3 +++
drivers/gpu/drm/i915/intel_sprite.c | 9 +++++--
4 files changed, 61 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 9464ba3..4d0c39d 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -5515,6 +5515,10 @@ enum skl_disp_power_wells {
#define PLANE_KEYMAX(pipe, plane) \
_MMIO_PLANE(plane, _PLANE_KEYMAX_1(pipe), _PLANE_KEYMAX_2(pipe))

+#define PLANE_KEYMAX_ALPHA_MASK 0x00ffffff
+#define PLANE_KEY_MASK_ALPHA_EN 31
+#define PLANE_KEY_MAX_ALPHA_SHIFT 24
+
#define _PLANE_BUF_CFG_1_B 0x7127c
#define _PLANE_BUF_CFG_2_B 0x7137c
#define _PLANE_BUF_CFG_1(pipe) \
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 037407f..31755f2 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -3032,6 +3032,8 @@ static void skylake_update_primary_plane(struct drm_plane *plane,
struct intel_crtc *intel_crtc = to_intel_crtc(crtc_state->base.crtc);
struct drm_framebuffer *fb = plane_state->base.fb;
struct drm_i915_gem_object *obj = intel_fb_obj(fb);
+ const struct drm_intel_sprite_colorkey *key =
+ &to_intel_plane_state(plane->state)->ckey;
int pipe = intel_crtc->pipe;
u32 plane_ctl, stride_div, stride;
u32 tile_height, plane_offset, plane_size;
@@ -3064,6 +3066,15 @@ static void skylake_update_primary_plane(struct drm_plane *plane,

WARN_ON(drm_rect_width(&plane_state->src) == 0);

+ I915_WRITE(PLANE_KEYMAX(pipe, 0), (DRM_MODE_COLOR_ALPHA_8
+ (plane_state->base.blend_mode.color)
+ << PLANE_KEY_MAX_ALPHA_SHIFT) |
+ (key->max_value & PLANE_KEYMAX_ALPHA_MASK));
+ I915_WRITE(PLANE_KEYMSK(pipe, 0),
+ (plane_state->use_plane_alpha
+ << PLANE_KEY_MASK_ALPHA_EN) |
+ (key->channel_mask & GENMASK(0, 26)));
+
if (intel_rotation_90_or_270(rotation)) {
int cpp = drm_format_plane_cpp(fb->pixel_format, 0);

@@ -3146,6 +3157,7 @@ static int intel_plane_state_check_blend(struct drm_plane_state *plane_state)
case DRM_BLEND_FUNC(AUTO, AUTO):
if (has_per_pixel_blending)
state->per_pixel_alpha = PRE_MULTIPLIED_ALPHA;
+ state->use_plane_alpha = false;
break;
/* fbs without an alpha channel, or dropping the alpha channel */
case DRM_BLEND_FUNC(ONE, ZERO):
@@ -3158,6 +3170,7 @@ static int intel_plane_state_check_blend(struct drm_plane_state *plane_state)
state->per_pixel_alpha = DROP_ALPHA;
else
state->per_pixel_alpha = PRE_MULTIPLIED_ALPHA;
+ state->use_plane_alpha = false;
break;
/* non pre-multiplied alpha */
case DRM_BLEND_FUNC(SRC_ALPHA, ONE_MINUS_SRC_ALPHA):
@@ -3165,6 +3178,34 @@ static int intel_plane_state_check_blend(struct drm_plane_state *plane_state)
state->per_pixel_alpha = DROP_ALPHA;
else
state->per_pixel_alpha = NON_PRE_MULTIPLIED_ALPHA;
+ state->use_plane_alpha = false;
+ break;
+ /* plane alpha */
+ case DRM_BLEND_FUNC(CONSTANT_ALPHA, ONE_MINUS_CONSTANT_ALPHA):
+ state->use_plane_alpha = true;
+ break;
+ /* plane alpha, pre-multiplied fb */
+ case DRM_BLEND_FUNC(CONSTANT_ALPHA,
+ ONE_MINUS_CONSTANT_ALPHA_TIMES_SRC_ALPHA):
+ if (!has_per_pixel_blending)
+ state->per_pixel_alpha = DROP_ALPHA;
+ else
+ state->per_pixel_alpha = PRE_MULTIPLIED_ALPHA;
+ /*TBD bspec check*/
+ state->use_plane_alpha = true;
+ break;
+ /* plane alpha, non pre-multiplied fb */
+ case DRM_BLEND_FUNC(CONSTANT_ALPHA_TIMES_SRC_ALPHA,
+ ONE_MINUS_CONSTANT_ALPHA_TIMES_SRC_ALPHA):
+ if (!has_per_pixel_blending)
+ state->per_pixel_alpha = DROP_ALPHA;
+ else
+ state->per_pixel_alpha = NON_PRE_MULTIPLIED_ALPHA;
+ state->use_plane_alpha = true;
+ break;
+ /* drop plane alpha */
+ case DRM_BLEND_FUNC(ZERO, ONE):
+ state->use_plane_alpha = false;
break;
default:
return -EINVAL;
@@ -14228,6 +14269,12 @@ void intel_plane_add_blend_properties(struct intel_plane *plane)
if (prop)
drm_object_attach_property(&plane->base.base, prop,
DRM_BLEND_FUNC(AUTO, AUTO));
+
+ prop = dev->mode_config.prop_blend_color;
+ if (prop)
+ drm_object_attach_property(&plane->base.base, prop,
+ DRM_MODE_COLOR(0xffff, 0xffff,
+ 0xffff, 0xffff));
}

static int
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index 1939440..d3cb36f 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -341,6 +341,9 @@ struct intel_plane_state {
/* per pixel alpha channel state */
enum per_pixel_alpha_state per_pixel_alpha;

+ /* use per-plane alpha */
+ bool use_plane_alpha;
+
/* async flip related structures */
struct drm_i915_gem_request *wait_req;
};
diff --git a/drivers/gpu/drm/i915/intel_sprite.c b/drivers/gpu/drm/i915/intel_sprite.c
index 9474b76..851c09a 100644
--- a/drivers/gpu/drm/i915/intel_sprite.c
+++ b/drivers/gpu/drm/i915/intel_sprite.c
@@ -226,10 +226,15 @@ skl_update_plane(struct drm_plane *drm_plane,
crtc_w--;
crtc_h--;

+ I915_WRITE(PLANE_KEYMAX(pipe, plane),
+ (DRM_MODE_COLOR_ALPHA_8(plane_state->base.blend_mode.color)
+ << 24) | (key->max_value & 0x00ffffff));
+ I915_WRITE(PLANE_KEYMSK(pipe, plane),
+ (plane_state->use_plane_alpha << 31) |
+ (key->channel_mask & GENMASK(0, 26)));
+
if (key->flags) {
I915_WRITE(PLANE_KEYVAL(pipe, plane), key->min_value);
- I915_WRITE(PLANE_KEYMAX(pipe, plane), key->max_value);
- I915_WRITE(PLANE_KEYMSK(pipe, plane), key->channel_mask);
}

if (key->flags & I915_SET_COLORKEY_DESTINATION)
--
1.9.1

_______________________________________________
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org