From patchwork Fri Feb 16 17:39:29 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Maxime Ripard X-Patchwork-Id: 10225233 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 7FFFF602CB for ; Fri, 16 Feb 2018 17:39:53 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 6FC02295D9 for ; Fri, 16 Feb 2018 17:39:53 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 6439229616; Fri, 16 Feb 2018 17:39:53 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-3.6 required=2.0 tests=BAYES_00,FUZZY_AMBIEN, RCVD_IN_DNSWL_MED,WEIRD_QUOTING autolearn=ham version=3.3.1 Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id D236B295D9 for ; Fri, 16 Feb 2018 17:39:52 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id BB56089A77; Fri, 16 Feb 2018 17:39:44 +0000 (UTC) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from mail.free-electrons.com (mail.free-electrons.com [62.4.15.54]) by gabe.freedesktop.org (Postfix) with ESMTP id C3BFF897B4 for ; Fri, 16 Feb 2018 17:39:40 +0000 (UTC) Received: by mail.free-electrons.com (Postfix, from userid 110) id 8D24E207FE; Fri, 16 Feb 2018 18:39:39 +0100 (CET) Received: from localhost (LFbn-TOU-1-32-80.w86-201.abo.wanadoo.fr [86.201.126.80]) by mail.free-electrons.com (Postfix) with ESMTPSA id 4CC692037F; Fri, 16 Feb 2018 18:39:39 +0100 (CET) From: Maxime Ripard To: Gustavo Padovan , Daniel Vetter , Maarten Lankhorst , Sean Paul Subject: [PATCH v3 1/8] drm/blend: Add a generic alpha property Date: Fri, 16 Feb 2018 18:39:29 +0100 Message-Id: <9403570d73b6eb63ab87488d5e8eb767ba6f1ac7.1518802627.git-series.maxime.ripard@bootlin.com> X-Mailer: git-send-email 2.14.3 In-Reply-To: References: MIME-Version: 1.0 In-Reply-To: References: X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Maxime Ripard , dri-devel@lists.freedesktop.org, Boris Brezillon , Chen-Yu Tsai , Laurent Pinchart , linux-arm-kernel@lists.infradead.org Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" X-Virus-Scanned: ClamAV using ClamSMTP Some drivers duplicate the logic to create a property to store a per-plane alpha. This is especially useful if we ever want to support extra protocols for Wayland like: https://lists.freedesktop.org/archives/wayland-devel/2017-August/034741.html Let's create a helper in order to move that to the core. Cc: Laurent Pinchart Reviewed-by: Boris Brezillon Signed-off-by: Maxime Ripard --- Documentation/gpu/kms-properties.csv | 2 +- drivers/gpu/drm/drm_atomic.c | 4 ++++- drivers/gpu/drm/drm_atomic_helper.c | 4 ++++- drivers/gpu/drm/drm_blend.c | 32 +++++++++++++++++++++++++++++- include/drm/drm_blend.h | 1 +- include/drm/drm_plane.h | 6 +++++- 6 files changed, 48 insertions(+), 1 deletion(-) diff --git a/Documentation/gpu/kms-properties.csv b/Documentation/gpu/kms-properties.csv index 927b65e14219..25ad3503d663 100644 --- a/Documentation/gpu/kms-properties.csv +++ b/Documentation/gpu/kms-properties.csv @@ -99,5 +99,5 @@ radeon,DVI-I,“coherent”,RANGE,"Min=0, Max=1",Connector,TBD ,,"""underscan vborder""",RANGE,"Min=0, Max=128",Connector,TBD ,Audio,“audio”,ENUM,"{ ""off"", ""on"", ""auto"" }",Connector,TBD ,FMT Dithering,“dither”,ENUM,"{ ""off"", ""on"" }",Connector,TBD -rcar-du,Generic,"""alpha""",RANGE,"Min=0, Max=255",Plane,TBD +,,"""alpha""",RANGE,"Min=0, Max=Driver dependant",Plane,Opacity of the plane from transparent (0) to fully opaque (MAX). If this property is set to a value different than max, and that the pixel will define an alpha component, the property will have precendance and the pixel value will be ignored. The alpha value is represented as straight alpha, ie the colors haven't been pre-adjusted for their opacity by multiplication. Therefore, the equation to get a color value for one pixel, assuming two planes A and B, will be (color_a * alpha_a + color_b * alpha_b * (MAX - alpha_a) / MAX) / (alpha_a + alpha_b * (MAX - alpha_a) / MAX) ,,"""colorkey""",RANGE,"Min=0, Max=0x01ffffff",Plane,TBD diff --git a/drivers/gpu/drm/drm_atomic.c b/drivers/gpu/drm/drm_atomic.c index 7d9ad20040a1..3defc56a1ef2 100644 --- a/drivers/gpu/drm/drm_atomic.c +++ b/drivers/gpu/drm/drm_atomic.c @@ -753,6 +753,8 @@ static int drm_atomic_plane_set_property(struct drm_plane *plane, state->src_w = val; } else if (property == config->prop_src_h) { state->src_h = val; + } else if (property == plane->alpha_property) { + state->alpha = val; } else if (property == plane->rotation_property) { if (!is_power_of_2(val & DRM_MODE_ROTATE_MASK)) return -EINVAL; @@ -814,6 +816,8 @@ drm_atomic_plane_get_property(struct drm_plane *plane, *val = state->src_w; } else if (property == config->prop_src_h) { *val = state->src_h; + } else if (property == plane->alpha_property) { + *val = state->alpha; } else if (property == plane->rotation_property) { *val = state->rotation; } else if (property == plane->zpos_property) { diff --git a/drivers/gpu/drm/drm_atomic_helper.c b/drivers/gpu/drm/drm_atomic_helper.c index ae3cbfe9e01c..2b88f593aab4 100644 --- a/drivers/gpu/drm/drm_atomic_helper.c +++ b/drivers/gpu/drm/drm_atomic_helper.c @@ -3482,6 +3482,10 @@ void drm_atomic_helper_plane_reset(struct drm_plane *plane) if (plane->state) { plane->state->plane = plane; plane->state->rotation = DRM_MODE_ROTATE_0; + + /* Reset the alpha value to fully opaque if it matters */ + if (plane->alpha_property) + plane->state->alpha = plane->alpha_property->values[1]; } } EXPORT_SYMBOL(drm_atomic_helper_plane_reset); diff --git a/drivers/gpu/drm/drm_blend.c b/drivers/gpu/drm/drm_blend.c index 4c62dff14893..a5dea7cbed2c 100644 --- a/drivers/gpu/drm/drm_blend.c +++ b/drivers/gpu/drm/drm_blend.c @@ -104,6 +104,38 @@ */ /** + * drm_plane_create_alpha_property - create a new alpha property + * @plane: drm plane + * @max_alpha: maximum value of alpha + * + * This function initializes a generic, mutable, alpha property and + * enables support for it in the DRM core. + * + * The alpha property will be allowed to be within the bounds of 0 + * (transparent) to @max_alpha (opaque) + * + * Returns: + * 0 on success, negative error code on failure. + */ +int drm_plane_create_alpha_property(struct drm_plane *plane, u16 max_alpha) +{ + struct drm_property *prop; + + prop = drm_property_create_range(plane->dev, 0, "alpha", 0, max_alpha); + if (!prop) + return -ENOMEM; + + drm_object_attach_property(&plane->base, prop, max_alpha); + plane->alpha_property = prop; + + if (plane->state) + plane->state->alpha = max_alpha; + + return 0; +} +EXPORT_SYMBOL(drm_plane_create_alpha_property); + +/** * drm_plane_create_rotation_property - create a new rotation property * @plane: drm plane * @rotation: initial value of the rotation property diff --git a/include/drm/drm_blend.h b/include/drm/drm_blend.h index 17606026590b..e5affba6ebde 100644 --- a/include/drm/drm_blend.h +++ b/include/drm/drm_blend.h @@ -36,6 +36,7 @@ static inline bool drm_rotation_90_or_270(unsigned int rotation) return rotation & (DRM_MODE_ROTATE_90 | DRM_MODE_ROTATE_270); } +int drm_plane_create_alpha_property(struct drm_plane *plane, u16 alpha); int drm_plane_create_rotation_property(struct drm_plane *plane, unsigned int rotation, unsigned int supported_rotations); diff --git a/include/drm/drm_plane.h b/include/drm/drm_plane.h index 8185e3468a23..5a6f29524f12 100644 --- a/include/drm/drm_plane.h +++ b/include/drm/drm_plane.h @@ -42,6 +42,7 @@ struct drm_modeset_acquire_ctx; * plane (in 16.16) * @src_w: width of visible portion of plane (in 16.16) * @src_h: height of visible portion of plane (in 16.16) + * @alpha: opacity of the plane * @rotation: rotation of the plane * @zpos: priority of the given plane on crtc (optional) * Note that multiple active planes on the same crtc can have an identical @@ -105,6 +106,9 @@ struct drm_plane_state { uint32_t src_x, src_y; uint32_t src_h, src_w; + /* Plane opacity */ + u8 alpha; + /* Plane rotation */ unsigned int rotation; @@ -481,6 +485,7 @@ enum drm_plane_type { * @funcs: helper functions * @properties: property tracking for this plane * @type: type of plane (overlay, primary, cursor) + * @alpha_property: alpha property for this plane * @zpos_property: zpos property for this plane * @rotation_property: rotation property for this plane * @helper_private: mid-layer private data @@ -556,6 +561,7 @@ struct drm_plane { */ struct drm_plane_state *state; + struct drm_property *alpha_property; struct drm_property *zpos_property; struct drm_property *rotation_property; };