From patchwork Tue Aug 29 00:05:07 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jessica Zhang X-Patchwork-Id: 13368455 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 38461C83F1A for ; Tue, 29 Aug 2023 00:07:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234521AbjH2AGw (ORCPT ); Mon, 28 Aug 2023 20:06:52 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53238 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234276AbjH2AG0 (ORCPT ); Mon, 28 Aug 2023 20:06:26 -0400 Received: from mx0a-0031df01.pphosted.com (mx0a-0031df01.pphosted.com [205.220.168.131]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2F4D1139; Mon, 28 Aug 2023 17:06:23 -0700 (PDT) Received: from pps.filterd (m0279863.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 37SNmnid001628; Tue, 29 Aug 2023 00:05:44 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=quicinc.com; h=from : date : subject : mime-version : content-type : content-transfer-encoding : message-id : references : in-reply-to : to : cc; s=qcppdkim1; bh=iXo5/IFJf2KMIxJECcJgZlNWZf5/Xql+HcDHYiBJC/E=; b=DZ4R7SMQfsGCLiwKOQ7yJYBjRRS3hKlAcKPjv8e4Ay5bIxhyVc/UCk/24yAXpFrtkAa+ d7xcVdNX4kRMG36BEuxydiv9SeWHC6pG9ABFNsXa/Uz5sNnTO5j3Obg5vV6kxWJXdOD5 C5WqnwnrzB5tzYdnwDXZ83wKgK1RMBUEIgthQOQ+v+AdtrNsB8se66alhFYh8r0GiDN0 Tdl2lrqaP64OaAZ32UuD6RzcRIuMDTjz6rOkmlvU01Uz58jRLbSARvXNd5D+XTGtQPqW ZgFA2DYyhCU8Yo40dP0CH4t4M7LHkyk01J0DnxSv77KSDKlsv3JMRgUBlXAfJe2Qy+8g MA== Received: from nasanppmta05.qualcomm.com (i-global254.qualcomm.com [199.106.103.254]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 3sq9m8vykh-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 29 Aug 2023 00:05:44 +0000 Received: from nasanex01b.na.qualcomm.com (nasanex01b.na.qualcomm.com [10.46.141.250]) by NASANPPMTA05.qualcomm.com (8.17.1.5/8.17.1.5) with ESMTPS id 37T05h2W032245 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 29 Aug 2023 00:05:43 GMT Received: from jesszhan-linux.qualcomm.com (10.80.80.8) by nasanex01b.na.qualcomm.com (10.46.141.250) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.36; Mon, 28 Aug 2023 17:05:43 -0700 From: Jessica Zhang Date: Mon, 28 Aug 2023 17:05:07 -0700 Subject: [PATCH RFC v6 01/10] drm: Introduce pixel_source DRM plane property MIME-Version: 1.0 Message-ID: <20230828-solid-fill-v6-1-a820efcce852@quicinc.com> References: <20230828-solid-fill-v6-0-a820efcce852@quicinc.com> In-Reply-To: <20230828-solid-fill-v6-0-a820efcce852@quicinc.com> To: Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Daniel Vetter , Rob Clark , Dmitry Baryshkov , "Sean Paul" , Marijn Suijten CC: , , , , , , , , , , , Jessica Zhang X-Mailer: b4 0.13-dev-83828 X-Developer-Signature: v=1; a=ed25519-sha256; t=1693267542; l=9586; i=quic_jesszhan@quicinc.com; s=20230329; h=from:subject:message-id; bh=nXCRWkCkCawtKrl5oXamniwN1Jf6CnqHe2orMF8EvwI=; b=Z76HBp7pWzGqGk4C2wjbK9FXJZwPvlJZLiP4nlVd0XkWlxySlRWmtfOH/EYnn4e/K4TE3uoUt 2yZjthmxp8RB+ce7mixjuQvAPMmqsA8Y+Wm94g2+atmBSS8aaHZJabf X-Developer-Key: i=quic_jesszhan@quicinc.com; a=ed25519; pk=gAUCgHZ6wTJOzQa3U0GfeCDH7iZLlqIEPo4rrjfDpWE= X-Originating-IP: [10.80.80.8] X-ClientProxiedBy: nasanex01b.na.qualcomm.com (10.46.141.250) To nasanex01b.na.qualcomm.com (10.46.141.250) X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-ORIG-GUID: 3r0TARHqtV-HEMi2KmB9rnu8_McYUAgp X-Proofpoint-GUID: 3r0TARHqtV-HEMi2KmB9rnu8_McYUAgp X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.267,Aquarius:18.0.957,Hydra:6.0.601,FMLib:17.11.176.26 definitions=2023-08-28_19,2023-08-28_04,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 suspectscore=0 phishscore=0 bulkscore=0 clxscore=1015 mlxscore=0 adultscore=0 priorityscore=1501 impostorscore=0 malwarescore=0 lowpriorityscore=0 mlxlogscore=659 spamscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2308100000 definitions=main-2308280207 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org Add support for pixel_source property to drm_plane and related documentation. In addition, force pixel_source to DRM_PLANE_PIXEL_SOURCE_FB in DRM_IOCTL_MODE_SETPLANE as to not break legacy userspace. This enum property will allow user to specify a pixel source for the plane. Possible pixel sources will be defined in the drm_plane_pixel_source enum. Currently, the only pixel sources are DRM_PLANE_PIXEL_SOURCE_FB (the default value) and DRM_PLANE_PIXEL_SOURCE_NONE. Signed-off-by: Jessica Zhang Acked-by: Pekka Paalanen Acked-by: Dmitry Baryshkov Acked-by: Sebastian Wick Acked-by: Simon Ser --- drivers/gpu/drm/drm_atomic_state_helper.c | 1 + drivers/gpu/drm/drm_atomic_uapi.c | 4 ++ drivers/gpu/drm/drm_blend.c | 90 +++++++++++++++++++++++++++++++ drivers/gpu/drm/drm_plane.c | 19 +++++-- include/drm/drm_blend.h | 2 + include/drm/drm_plane.h | 21 ++++++++ 6 files changed, 133 insertions(+), 4 deletions(-) diff --git a/drivers/gpu/drm/drm_atomic_state_helper.c b/drivers/gpu/drm/drm_atomic_state_helper.c index 784e63d70a42..01638c51ce0a 100644 --- a/drivers/gpu/drm/drm_atomic_state_helper.c +++ b/drivers/gpu/drm/drm_atomic_state_helper.c @@ -252,6 +252,7 @@ void __drm_atomic_helper_plane_state_reset(struct drm_plane_state *plane_state, plane_state->alpha = DRM_BLEND_ALPHA_OPAQUE; plane_state->pixel_blend_mode = DRM_MODE_BLEND_PREMULTI; + plane_state->pixel_source = DRM_PLANE_PIXEL_SOURCE_FB; if (plane->color_encoding_property) { if (!drm_object_property_get_default_value(&plane->base, diff --git a/drivers/gpu/drm/drm_atomic_uapi.c b/drivers/gpu/drm/drm_atomic_uapi.c index d867e7f9f2cd..454f980e16c9 100644 --- a/drivers/gpu/drm/drm_atomic_uapi.c +++ b/drivers/gpu/drm/drm_atomic_uapi.c @@ -544,6 +544,8 @@ 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->pixel_source_property) { + state->pixel_source = val; } else if (property == plane->alpha_property) { state->alpha = val; } else if (property == plane->blend_mode_property) { @@ -616,6 +618,8 @@ 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->pixel_source_property) { + *val = state->pixel_source; } else if (property == plane->alpha_property) { *val = state->alpha; } else if (property == plane->blend_mode_property) { diff --git a/drivers/gpu/drm/drm_blend.c b/drivers/gpu/drm/drm_blend.c index 6e74de833466..c3c57bae06b7 100644 --- a/drivers/gpu/drm/drm_blend.c +++ b/drivers/gpu/drm/drm_blend.c @@ -185,6 +185,21 @@ * plane does not expose the "alpha" property, then this is * assumed to be 1.0 * + * pixel_source: + * pixel_source is set up with drm_plane_create_pixel_source_property(). + * It is used to toggle the active source of pixel data for the plane. + * The plane will only display data from the set pixel_source -- any + * data from other sources will be ignored. + * + * Possible values: + * + * "NONE": + * No active pixel source. + * Committing with a NONE pixel source will disable the plane. + * + * "FB": + * Framebuffer source set by the "FB_ID" property. + * * Note that all the property extensions described here apply either to the * plane or the CRTC (e.g. for the background color, which currently is not * exposed and assumed to be black). @@ -615,3 +630,78 @@ int drm_plane_create_blend_mode_property(struct drm_plane *plane, return 0; } EXPORT_SYMBOL(drm_plane_create_blend_mode_property); + +static const struct drm_prop_enum_list drm_pixel_source_enum_list[] = { + { DRM_PLANE_PIXEL_SOURCE_NONE, "NONE" }, + { DRM_PLANE_PIXEL_SOURCE_FB, "FB" }, +}; + +/** + * drm_plane_create_pixel_source_property - create a new pixel source property + * @plane: DRM plane + * @extra_sources: Bitmask of additional supported pixel_sources for the driver. + * DRM_PLANE_PIXEL_SOURCE_FB and DRM_PLANE_PIXEL_SOURCE_NONE will + * always be enabled as supported sources. + * + * This creates a new property describing the current source of pixel data for the + * plane. The pixel_source will be initialized as DRM_PLANE_PIXEL_SOURCE_FB by default. + * + * Drivers can set a custom default source by overriding the pixel_source value in + * drm_plane_funcs.reset() + * + * The property is exposed to userspace as an enumeration property called + * "pixel_source" and has the following enumeration values: + * + * "NONE": + * No active pixel source + * + * "FB": + * Framebuffer pixel source + * + * Returns: + * Zero on success, negative errno on failure. + */ +int drm_plane_create_pixel_source_property(struct drm_plane *plane, + unsigned long extra_sources) +{ + struct drm_device *dev = plane->dev; + struct drm_property *prop; + static const unsigned int valid_source_mask = BIT(DRM_PLANE_PIXEL_SOURCE_FB) | + BIT(DRM_PLANE_PIXEL_SOURCE_NONE); + int i; + + /* FB is supported by default */ + unsigned long supported_sources = extra_sources | + BIT(DRM_PLANE_PIXEL_SOURCE_FB) | + BIT(DRM_PLANE_PIXEL_SOURCE_NONE); + + if (WARN_ON(supported_sources & ~valid_source_mask)) + return -EINVAL; + + prop = drm_property_create(dev, DRM_MODE_PROP_ENUM | DRM_MODE_PROP_ATOMIC, "pixel_source", + hweight32(supported_sources)); + + if (!prop) + return -ENOMEM; + + for (i = 0; i < ARRAY_SIZE(drm_pixel_source_enum_list); i++) { + int ret; + + if (!test_bit(drm_pixel_source_enum_list[i].type, &supported_sources)) + continue; + + ret = drm_property_add_enum(prop, drm_pixel_source_enum_list[i].type, + drm_pixel_source_enum_list[i].name); + if (ret) { + drm_property_destroy(dev, prop); + + return ret; + } + } + + drm_object_attach_property(&plane->base, prop, DRM_PLANE_PIXEL_SOURCE_FB); + plane->pixel_source_property = prop; + + return 0; +} +EXPORT_SYMBOL(drm_plane_create_pixel_source_property); diff --git a/drivers/gpu/drm/drm_plane.c b/drivers/gpu/drm/drm_plane.c index 24e7998d1731..559d101162ba 100644 --- a/drivers/gpu/drm/drm_plane.c +++ b/drivers/gpu/drm/drm_plane.c @@ -839,6 +839,14 @@ bool drm_any_plane_has_format(struct drm_device *dev, } EXPORT_SYMBOL(drm_any_plane_has_format); +static bool drm_plane_needs_disable(struct drm_plane_state *state, struct drm_framebuffer *fb) +{ + if (state->pixel_source == DRM_PLANE_PIXEL_SOURCE_NONE) + return true; + + return state->pixel_source == DRM_PLANE_PIXEL_SOURCE_FB && fb == NULL; +} + /* * __setplane_internal - setplane handler for internal callers * @@ -861,8 +869,8 @@ static int __setplane_internal(struct drm_plane *plane, WARN_ON(drm_drv_uses_atomic_modeset(plane->dev)); - /* No fb means shut it down */ - if (!fb) { + /* No visible data means shut it down */ + if (drm_plane_needs_disable(plane->state, fb)) { plane->old_fb = plane->fb; ret = plane->funcs->disable_plane(plane, ctx); if (!ret) { @@ -913,8 +921,8 @@ static int __setplane_atomic(struct drm_plane *plane, WARN_ON(!drm_drv_uses_atomic_modeset(plane->dev)); - /* No fb means shut it down */ - if (!fb) + /* No visible data means shut it down */ + if (drm_plane_needs_disable(plane->state, fb)) return plane->funcs->disable_plane(plane, ctx); /* @@ -987,6 +995,9 @@ int drm_mode_setplane(struct drm_device *dev, void *data, return -ENOENT; } + if (plane->state) + plane->state->pixel_source = DRM_PLANE_PIXEL_SOURCE_FB; + if (plane_req->fb_id) { fb = drm_framebuffer_lookup(dev, file_priv, plane_req->fb_id); if (!fb) { diff --git a/include/drm/drm_blend.h b/include/drm/drm_blend.h index 88bdfec3bd88..122bbfbaae33 100644 --- a/include/drm/drm_blend.h +++ b/include/drm/drm_blend.h @@ -58,4 +58,6 @@ int drm_atomic_normalize_zpos(struct drm_device *dev, struct drm_atomic_state *state); int drm_plane_create_blend_mode_property(struct drm_plane *plane, unsigned int supported_modes); +int drm_plane_create_pixel_source_property(struct drm_plane *plane, + unsigned long extra_sources); #endif diff --git a/include/drm/drm_plane.h b/include/drm/drm_plane.h index 51291983ea44..89508b4dea4a 100644 --- a/include/drm/drm_plane.h +++ b/include/drm/drm_plane.h @@ -40,6 +40,12 @@ enum drm_scaling_filter { DRM_SCALING_FILTER_NEAREST_NEIGHBOR, }; +enum drm_plane_pixel_source { + DRM_PLANE_PIXEL_SOURCE_NONE, + DRM_PLANE_PIXEL_SOURCE_FB, + DRM_PLANE_PIXEL_SOURCE_MAX +}; + /** * struct drm_plane_state - mutable plane state * @@ -116,6 +122,14 @@ struct drm_plane_state { /** @src_h: height of visible portion of plane (in 16.16) */ uint32_t src_h, src_w; + /** + * @pixel_source: + * + * Source of pixel information for the plane. See + * drm_plane_create_pixel_source_property() for more details. + */ + enum drm_plane_pixel_source pixel_source; + /** * @alpha: * Opacity of the plane with 0 as completely transparent and 0xffff as @@ -699,6 +713,13 @@ struct drm_plane { */ struct drm_plane_state *state; + /* + * @pixel_source_property: + * Optional pixel_source property for this plane. See + * drm_plane_create_pixel_source_property(). + */ + struct drm_property *pixel_source_property; + /** * @alpha_property: * Optional alpha property for this plane. See