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Tue, 22 Jan 2019 11:05:51 +0000 From: "james qian wang (Arm Technology China)" To: Liviu Dudau , "airlied@linux.ie" , Brian Starkey , "maarten.lankhorst@linux.intel.com" , "sean@poorly.run" CC: "Jonathan Chai (Arm Technology China)" , "Julien Yin (Arm Technology China)" , "thomas Sun (Arm Technology China)" , "Lowry Li (Arm Technology China)" , Ayan Halder , "Tiannan Zhu (Arm Technology China)" , "Jin Gao (Arm Technology China)" , "Yiqi Kang (Arm Technology China)" , nd , "malidp@foss.arm.com" , "linux-kernel@vger.kernel.org" , "dri-devel@lists.freedesktop.org" , "james qian wang (Arm Technology China)" Subject: [PATCH v2 2/5] drm/komeda: Add komeda_pipeline/component_get_state_and_set_user Thread-Topic: [PATCH v2 2/5] drm/komeda: Add komeda_pipeline/component_get_state_and_set_user Thread-Index: AQHUskJvY0A0BIanXk6La5fKStczuA== Date: Tue, 22 Jan 2019 11:05:51 +0000 Message-ID: <20190122110431.5025-3-james.qian.wang@arm.com> References: <20190122110431.5025-1-james.qian.wang@arm.com> In-Reply-To: <20190122110431.5025-1-james.qian.wang@arm.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [113.29.88.7] x-clientproxiedby: SYAPR01CA0021.ausprd01.prod.outlook.com (2603:10c6:1::33) To DB6PR0801MB1990.eurprd08.prod.outlook.com (2603:10a6:4:6c::21) authentication-results: spf=none (sender IP is ) smtp.mailfrom=james.qian.wang@arm.com; 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charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: arm.com X-MS-Exchange-CrossTenant-Network-Message-Id: e1fb1516-cfbe-4e60-6ddd-08d6805991d5 X-MS-Exchange-CrossTenant-originalarrivaltime: 22 Jan 2019 11:05:41.6475 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: f34e5979-57d9-4aaa-ad4d-b122a662184d X-MS-Exchange-Transport-CrossTenantHeadersStamped: DB6PR0801MB1671 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: "james qian wang (Arm Technology China)" get_state_and_set_user packed get_state and set_user into one function, which get pipeline/component state for a specific pipeline/component, if success set the user to it. v2: - Rebase. - Applied commit: b962a12050a3 ("drm/atomic: integrate modeset lock with private objects") And delete our private modeset lock for pipeline. Signed-off-by: James Qian Wang (Arm Technology China) --- drivers/gpu/drm/arm/display/komeda/Makefile | 1 + .../display/komeda/komeda_pipeline_state.c | 142 ++++++++++++++++++ 2 files changed, 143 insertions(+) create mode 100644 drivers/gpu/drm/arm/display/komeda/komeda_pipeline_stat= e.c diff --git a/drivers/gpu/drm/arm/display/komeda/Makefile b/drivers/gpu/drm/= arm/display/komeda/Makefile index d593125236ae..62bd1bff66a3 100644 --- a/drivers/gpu/drm/arm/display/komeda/Makefile +++ b/drivers/gpu/drm/arm/display/komeda/Makefile @@ -9,6 +9,7 @@ komeda-y :=3D \ komeda_dev.o \ komeda_format_caps.o \ komeda_pipeline.o \ + komeda_pipeline_state.o \ komeda_framebuffer.o \ komeda_kms.o \ komeda_crtc.o \ diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_pipeline_state.c b/d= rivers/gpu/drm/arm/display/komeda/komeda_pipeline_state.c new file mode 100644 index 000000000000..7ebab4fae567 --- /dev/null +++ b/drivers/gpu/drm/arm/display/komeda/komeda_pipeline_state.c @@ -0,0 +1,142 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * (C) COPYRIGHT 2018 ARM Limited. All rights reserved. + * Author: James.Qian.Wang + * + */ +#include +#include "komeda_dev.h" +#include "komeda_kms.h" +#include "komeda_pipeline.h" + +static inline bool is_switching_user(void *old, void *new) +{ + if (!old || !new) + return false; + + return old !=3D new; +} + +struct komeda_pipeline_state * +komeda_pipeline_get_state(struct komeda_pipeline *pipe, + struct drm_atomic_state *state) +{ + struct drm_private_state *priv_st; + + priv_st =3D drm_atomic_get_private_obj_state(state, &pipe->obj); + if (IS_ERR(priv_st)) + return ERR_CAST(priv_st); + + return priv_to_pipe_st(priv_st); +} + +/* Assign pipeline for crtc */ +struct komeda_pipeline_state * +komeda_pipeline_get_state_and_set_crtc(struct komeda_pipeline *pipe, + struct drm_atomic_state *state, + struct drm_crtc *crtc) +{ + struct komeda_pipeline_state *st; + + st =3D komeda_pipeline_get_state(pipe, state); + if (IS_ERR(st)) + return st; + + if (is_switching_user(crtc, st->crtc)) { + DRM_DEBUG_ATOMIC("CRTC%d required pipeline%d is busy.\n", + drm_crtc_index(crtc), pipe->id); + return ERR_PTR(-EBUSY); + } + + /* pipeline only can be disabled when the it is free or unused */ + if (!crtc && st->active_comps) { + DRM_DEBUG_ATOMIC("Disabling a busy pipeline:%d.\n", pipe->id); + return ERR_PTR(-EBUSY); + } + + st->crtc =3D crtc; + + if (crtc) { + struct komeda_crtc_state *kcrtc_st; + + kcrtc_st =3D to_kcrtc_st(drm_atomic_get_new_crtc_state(state, + crtc)); + + kcrtc_st->active_pipes |=3D BIT(pipe->id); + kcrtc_st->affected_pipes |=3D BIT(pipe->id); + } + return st; +} + +static struct komeda_component_state * +komeda_component_get_state(struct komeda_component *c, + struct drm_atomic_state *state) +{ + struct drm_private_state *priv_st; + + WARN_ON(!drm_modeset_is_locked(&c->pipeline->obj.lock)); + + priv_st =3D drm_atomic_get_private_obj_state(state, &c->obj); + if (IS_ERR(priv_st)) + return ERR_CAST(priv_st); + + return priv_to_comp_st(priv_st); +} + +/** + * komeda_component_get_state_and_set_user() + * + * @c: component to get state and set user + * @state: global atomic state + * @user: direct user, the binding user + * @crtc: the CRTC user, the big boss :) + * + * This function accepts two users: + * - The direct user: can be plane/crtc/wb_connector depends on componen= t + * - The big boss (CRTC) + * CRTC is the big boss (the final user), because all component resources + * eventually will be assigned to CRTC, like the layer will be binding to + * kms_plane, but kms plane will be binding to a CRTC eventually. + * + * The big boss (CRTC) is for pipeline assignment, since &komeda_component= isn't + * independent and can be assigned to CRTC freely, but belongs to a specif= ic + * pipeline, only pipeline can be shared between crtc, and pipeline as a w= hole + * (include all the internal components) assigned to a specific CRTC. + * + * So when set a user to komeda_component, need first to check the status = of + * component->pipeline to see if the pipeline is available on this specifi= c + * CRTC. if the pipeline is busy (assigned to another CRTC), even the requ= ired + * component is free, the component still cannot be assigned to the direct= user. + */ +struct komeda_component_state * +komeda_component_get_state_and_set_user(struct komeda_component *c, + struct drm_atomic_state *state, + void *user, + struct drm_crtc *crtc) +{ + struct komeda_pipeline_state *pipe_st; + struct komeda_component_state *st; + + /* First check if the pipeline is available */ + pipe_st =3D komeda_pipeline_get_state_and_set_crtc(c->pipeline, + state, crtc); + if (IS_ERR(pipe_st)) + return ERR_CAST(pipe_st); + + st =3D komeda_component_get_state(c, state); + if (IS_ERR(st)) + return st; + + /* check if the component has been occupied */ + if (is_switching_user(user, st->binding_user)) { + DRM_DEBUG_ATOMIC("required %s is busy.\n", c->name); + return ERR_PTR(-EBUSY); + } + + st->binding_user =3D user; + /* mark the component as active if user is valid */ + if (st->binding_user) + pipe_st->active_comps |=3D BIT(c->id); + + return st; +} --=20 2.17.1