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SubjectRe: [PATCH v3 7/9] drm/komeda: Attach komeda_dev to DRM-KMS
On Fri, Dec 21, 2018 at 10:00:33AM +0000, james qian wang (Arm Technology China) wrote:
> Add komeda_kms abstracton to attach komeda_dev to DRM-KMS
> CRTC: according to the komeda_pipeline
> PLANE: according to komeda_layer (layer input pipeline)
> PRIVATE_OBJS: komeda_pipeline/component all will be treat as private_objs
>
> komeda_kms is for connecting DRM-KMS and komeda_dev, like reporting the
> kms object properties according to the komeda_dev, and pass/convert KMS's
> requirement to komeda_dev.
>
> Changes in v3:
> - Fixed style problem found by checkpatch.pl --strict.
>
> Changes in v2:
> - Unified abbreviation of "pipeline" to "pipe".
>
> Signed-off-by: James (Qian) Wang <james.qian.wang@arm.com>
> ---
> drivers/gpu/drm/arm/display/komeda/Makefile | 6 +-
> .../gpu/drm/arm/display/komeda/komeda_crtc.c | 106 +++++++++++
> .../gpu/drm/arm/display/komeda/komeda_drv.c | 19 +-
> .../gpu/drm/arm/display/komeda/komeda_kms.c | 169 ++++++++++++++++++
> .../gpu/drm/arm/display/komeda/komeda_kms.h | 113 ++++++++++++
> .../drm/arm/display/komeda/komeda_pipeline.h | 3 +
> .../gpu/drm/arm/display/komeda/komeda_plane.c | 109 +++++++++++
> .../arm/display/komeda/komeda_private_obj.c | 88 +++++++++
> 8 files changed, 608 insertions(+), 5 deletions(-)
> create mode 100644 drivers/gpu/drm/arm/display/komeda/komeda_crtc.c
> create mode 100644 drivers/gpu/drm/arm/display/komeda/komeda_kms.c
> create mode 100644 drivers/gpu/drm/arm/display/komeda/komeda_kms.h
> create mode 100644 drivers/gpu/drm/arm/display/komeda/komeda_plane.c
> create mode 100644 drivers/gpu/drm/arm/display/komeda/komeda_private_obj.c
>
> diff --git a/drivers/gpu/drm/arm/display/komeda/Makefile b/drivers/gpu/drm/arm/display/komeda/Makefile
> index 25beae900ed2..1b875e5dc0f6 100644
> --- a/drivers/gpu/drm/arm/display/komeda/Makefile
> +++ b/drivers/gpu/drm/arm/display/komeda/Makefile
> @@ -9,7 +9,11 @@ komeda-y := \
> komeda_dev.o \
> komeda_format_caps.o \
> komeda_pipeline.o \
> - komeda_framebuffer.o
> + komeda_framebuffer.o \
> + komeda_kms.o \
> + komeda_crtc.o \
> + komeda_plane.o \
> + komeda_private_obj.o
>
> komeda-y += \
> d71/d71_dev.o
> diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_crtc.c b/drivers/gpu/drm/arm/display/komeda/komeda_crtc.c
> new file mode 100644
> index 000000000000..5bb5a55f6b31
> --- /dev/null
> +++ b/drivers/gpu/drm/arm/display/komeda/komeda_crtc.c
> @@ -0,0 +1,106 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * (C) COPYRIGHT 2018 ARM Limited. All rights reserved.
> + * Author: James.Qian.Wang <james.qian.wang@arm.com>
> + *
> + */
> +#include <linux/clk.h>
> +#include <linux/spinlock.h>
> +#include <drm/drm_atomic.h>
> +#include <drm/drm_atomic_helper.h>
> +#include <drm/drm_plane_helper.h>
> +#include <drm/drm_crtc_helper.h>
> +#include <linux/pm_runtime.h>
> +#include "komeda_dev.h"
> +#include "komeda_kms.h"
> +
> +struct drm_crtc_helper_funcs komeda_crtc_helper_funcs = {
> +};
> +
> +static const struct drm_crtc_funcs komeda_crtc_funcs = {
> +};
> +
> +int komeda_kms_setup_crtcs(struct komeda_kms_dev *kms,
> + struct komeda_dev *mdev)
> +{
> + struct komeda_crtc *crtc;
> + struct komeda_pipeline *master;
> + char str[16];
> + int i;
> +
> + kms->n_crtcs = 0;
> +
> + for (i = 0; i < mdev->n_pipelines; i++) {
> + crtc = &kms->crtcs[kms->n_crtcs];
> + master = mdev->pipelines[i];
> +
> + crtc->master = master;
> + crtc->slave = NULL;
> +
> + if (crtc->slave)
> + sprintf(str, "pipe-%d", crtc->slave->id);
> + else
> + sprintf(str, "None");
> +
> + DRM_INFO("crtc%d: master(pipe-%d) slave(%s) output: %s.\n",
> + kms->n_crtcs, master->id, str,
> + master->of_output_dev ?
> + master->of_output_dev->full_name : "None");
> +
> + kms->n_crtcs++;
> + }
> +
> + return 0;
> +}
> +
> +static struct drm_plane *
> +get_crtc_primary(struct komeda_kms_dev *kms, struct komeda_crtc *crtc)
> +{
> + struct komeda_plane *kplane;
> + struct drm_plane *plane;
> +
> + drm_for_each_plane(plane, &kms->base) {
> + if (plane->type != DRM_PLANE_TYPE_PRIMARY)
> + continue;
> +
> + kplane = to_kplane(plane);
> + /* only master can be primary */
> + if (kplane->layer->base.pipeline == crtc->master)
> + return plane;
> + }
> +
> + return NULL;
> +}
> +
> +static int komeda_crtc_add(struct komeda_kms_dev *kms,
> + struct komeda_crtc *kcrtc)
> +{
> + struct drm_crtc *crtc = &kcrtc->base;
> + int err;
> +
> + err = drm_crtc_init_with_planes(&kms->base, crtc,
> + get_crtc_primary(kms, kcrtc), NULL,
> + &komeda_crtc_funcs, NULL);
> + if (err)
> + return err;
> +
> + drm_crtc_helper_add(crtc, &komeda_crtc_helper_funcs);
> + drm_crtc_vblank_reset(crtc);
> +
> + crtc->port = kcrtc->master->of_output_port;
> +
> + return 0;
> +}
> +
> +int komeda_kms_add_crtcs(struct komeda_kms_dev *kms, struct komeda_dev *mdev)
> +{
> + int i, err;
> +
> + for (i = 0; i < kms->n_crtcs; i++) {
> + err = komeda_crtc_add(kms, &kms->crtcs[i]);
> + if (err)
> + return err;
> + }
> +
> + return 0;
> +}
> diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_drv.c b/drivers/gpu/drm/arm/display/komeda/komeda_drv.c
> index a2657b3d09d7..4b8ce717a71c 100644
> --- a/drivers/gpu/drm/arm/display/komeda/komeda_drv.c
> +++ b/drivers/gpu/drm/arm/display/komeda/komeda_drv.c
> @@ -13,18 +13,21 @@
>
> struct komeda_drv {
> struct komeda_dev *mdev;
> + struct komeda_kms_dev *kms;
> };
>
> static void komeda_unbind(struct device *dev)
> {
> struct komeda_drv *mdrv = dev_get_drvdata(dev);
>
> - dev_set_drvdata(dev, NULL);
> -

I would argue that you're fixing a bug here that was introduced in an
earlier patch, and that you should fix that patch rather than this
change.

> if (!mdrv)
> return;
>
> + komeda_kms_detach(mdrv->kms);
> +
> komeda_dev_destroy(mdrv->mdev);
> +
> + dev_set_drvdata(dev, NULL);
> kfree(mdrv);
> }
>
> @@ -33,7 +36,7 @@ static int komeda_bind(struct device *dev)
> struct komeda_drv *mdrv;
> int err;
>
> - mdrv = kzalloc(sizeof(*mdrv), GFP_KERNEL);
> + mdrv = devm_kzalloc(dev, sizeof(*mdrv), GFP_KERNEL);
> if (!mdrv)
> return -ENOMEM;
>
> @@ -45,10 +48,18 @@ static int komeda_bind(struct device *dev)
>
> dev_set_drvdata(dev, mdrv);
>
> + mdrv->kms = komeda_kms_attach(mdrv->mdev);
> + if (IS_ERR(mdrv->kms)) {
> + err = PTR_ERR(mdrv->kms);

does mdrv->kms needs to be set to NULL here?

> + goto destroy_mdev;
> + }
> +
> return 0;
>
> +destroy_mdev:
> + komeda_dev_destroy(mdrv->mdev);
> free_mdrv:
> - kfree(mdrv);
> + devm_kfree(dev, mdrv);
> return err;
> }
>
> diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_kms.c b/drivers/gpu/drm/arm/display/komeda/komeda_kms.c
> new file mode 100644
> index 000000000000..fd48360ca524
> --- /dev/null
> +++ b/drivers/gpu/drm/arm/display/komeda/komeda_kms.c
> @@ -0,0 +1,169 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * (C) COPYRIGHT 2018 ARM Limited. All rights reserved.
> + * Author: James.Qian.Wang <james.qian.wang@arm.com>
> + *
> + */
> +#include <linux/component.h>
> +#include <drm/drm_atomic.h>
> +#include <drm/drm_atomic_helper.h>
> +#include <drm/drm_gem_framebuffer_helper.h>
> +#include <drm/drm_gem_cma_helper.h>
> +#include <drm/drm_fb_helper.h>
> +#include <linux/interrupt.h>
> +#include "komeda_dev.h"
> +#include "komeda_kms.h"
> +#include "komeda_framebuffer.h"
> +
> +DEFINE_DRM_GEM_CMA_FOPS(komeda_cma_fops);
> +
> +static int komeda_gem_cma_dumb_create(struct drm_file *file,
> + struct drm_device *dev,
> + struct drm_mode_create_dumb *args)
> +{
> + u32 alignment = 16; /* TODO get alignment from dev */
> +
> + args->pitch = ALIGN(DIV_ROUND_UP(args->width * args->bpp, 8),
> + alignment);
> +
> + return drm_gem_cma_dumb_create_internal(file, dev, args);
> +}
> +
> +static struct drm_driver komeda_kms_driver = {
> + .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC |
> + DRIVER_PRIME,
> + .lastclose = drm_fb_helper_lastclose,
> + .gem_free_object_unlocked = drm_gem_cma_free_object,
> + .gem_vm_ops = &drm_gem_cma_vm_ops,
> + .dumb_create = komeda_gem_cma_dumb_create,
> + .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
> + .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
> + .gem_prime_export = drm_gem_prime_export,
> + .gem_prime_import = drm_gem_prime_import,
> + .gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
> + .gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
> + .gem_prime_vmap = drm_gem_cma_prime_vmap,
> + .gem_prime_vunmap = drm_gem_cma_prime_vunmap,
> + .gem_prime_mmap = drm_gem_cma_prime_mmap,
> + .fops = &komeda_cma_fops,
> + .name = "komeda",
> + .desc = "ARM Mali Komeda Display Processor driver",
> + .date = "20181101",
> + .major = 0,
> + .minor = 1,
> +};
> +
> +static void komeda_kms_commit_tail(struct drm_atomic_state *old_state)
> +{
> + struct drm_device *dev = old_state->dev;
> +
> + drm_atomic_helper_commit_modeset_disables(dev, old_state);
> +
> + drm_atomic_helper_commit_planes(dev, old_state, 0);
> +
> + drm_atomic_helper_commit_modeset_enables(dev, old_state);
Mainline has also introduced the drm_atomic_helper_fake_vblank(old_state) call
to help with writebacks on CRTCs that might be otherwise disabled. Do we need
to have it here too?

> +
> + drm_atomic_helper_wait_for_flip_done(dev, old_state);
> +
> + drm_atomic_helper_commit_hw_done(old_state);
> +
> + drm_atomic_helper_cleanup_planes(dev, old_state);
> +}
> +
> +static const struct drm_mode_config_helper_funcs komeda_mode_config_helpers = {
> + .atomic_commit_tail = komeda_kms_commit_tail,
> +};
> +
> +static const struct drm_mode_config_funcs komeda_mode_config_funcs = {
> + .fb_create = komeda_fb_create,
> + .atomic_check = NULL,/*komeda_kms_check*/

I would argue that you should at least use drm_atomic_helper_check here,
rather than set it to NULL, even if later you will replace it with a
komeda function.

> + .atomic_commit = drm_atomic_helper_commit,
> +};
> +
> +static void komeda_kms_mode_config_init(struct komeda_kms_dev *kms,
> + struct komeda_dev *mdev)
> +{
> + struct drm_mode_config *config = &kms->base.mode_config;
> +
> + drm_mode_config_init(&kms->base);
> +
> + komeda_kms_setup_crtcs(kms, mdev);
> +
> + /* Get value from dev */
> + config->min_width = 0;
> + config->min_height = 0;
> + config->max_width = 4096;
> + config->max_height = 4096;
> + config->allow_fb_modifiers = true;
> +
> + config->funcs = &komeda_mode_config_funcs;
> + config->helper_private = &komeda_mode_config_helpers;
> +}
> +
> +struct komeda_kms_dev *komeda_kms_attach(struct komeda_dev *mdev)
> +{
> + struct komeda_kms_dev *kms = kzalloc(sizeof(*kms), GFP_KERNEL);
> + struct drm_device *drm;
> + int err;
> +
> + if (!kms)
> + return ERR_PTR(-ENOMEM);
> +
> + drm = &kms->base;
> + err = drm_dev_init(drm, &komeda_kms_driver, mdev->dev);
> + if (err)
> + goto free_kms;
> +
> + drm->dev_private = mdev;
> +
> + komeda_kms_mode_config_init(kms, mdev);
> +
> + err = komeda_kms_add_private_objs(kms, mdev);
> + if (err)
> + goto cleanup_mode_config;
> +
> + err = komeda_kms_add_planes(kms, mdev);
> + if (err)
> + goto cleanup_mode_config;
> +
> + err = drm_vblank_init(drm, kms->n_crtcs);
> + if (err)
> + goto cleanup_mode_config;
> +
> + err = komeda_kms_add_crtcs(kms, mdev);
> + if (err)
> + goto cleanup_mode_config;
> +
> + err = component_bind_all(mdev->dev, kms);
> + if (err)
> + goto cleanup_mode_config;
> +
> + drm_mode_config_reset(drm);
> +
> + err = drm_dev_register(drm, 0);
> + if (err)
> + goto uninstall_irq;
> +
> + return kms;
> +
> +uninstall_irq:
> + drm_irq_uninstall(drm);
> +cleanup_mode_config:
> + drm_mode_config_cleanup(drm);
> +free_kms:
> + kfree(kms);
> + return ERR_PTR(err);
> +}
> +
> +void komeda_kms_detach(struct komeda_kms_dev *kms)
> +{
> + struct drm_device *drm = &kms->base;
> + struct komeda_dev *mdev = drm->dev_private;
> +
> + drm_dev_unregister(drm);
> + component_unbind_all(mdev->dev, drm);
> + komeda_kms_cleanup_private_objs(mdev);
> + drm_mode_config_cleanup(drm);
> + drm->dev_private = NULL;
> + drm_dev_put(drm);
> +}
> diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_kms.h b/drivers/gpu/drm/arm/display/komeda/komeda_kms.h
> new file mode 100644
> index 000000000000..f13666004a42
> --- /dev/null
> +++ b/drivers/gpu/drm/arm/display/komeda/komeda_kms.h
> @@ -0,0 +1,113 @@
> +/* SPDX-License-Identifier: GPL-2.0 */
> +/*
> + * (C) COPYRIGHT 2018 ARM Limited. All rights reserved.
> + * Author: James.Qian.Wang <james.qian.wang@arm.com>
> + *
> + */
> +#ifndef _KOMEDA_KMS_H_
> +#define _KOMEDA_KMS_H_
> +
> +#include <drm/drm_atomic.h>
> +#include <drm/drm_atomic_helper.h>
> +#include <drm/drm_crtc_helper.h>
> +#include <drm/drm_writeback.h>
> +
> +/** struct komeda_plane - komeda instance of drm_plane */
> +struct komeda_plane {
> + /** @base: &drm_plane */
> + struct drm_plane base;
> + /**
> + * @layer:
> + *
> + * represents available layer input pipelines for this plane.
> + *
> + * NOTE:
> + * the layer is not for a specific Layer, but indicate a group of
> + * Layers with same capabilities.
> + */
> + struct komeda_layer *layer;
> +};
> +
> +/**
> + * struct komeda_plane_state
> + *
> + * The plane_state can be split into two data flow (left/right) and handled
> + * by two layers &komeda_plane.layer and &komeda_plane.layer.right
> + */
> +struct komeda_plane_state {
> + /** @base: &drm_plane_state */
> + struct drm_plane_state base;
> +
> + /* private properties */
> +};
> +
> +/**
> + * struct komeda_wb_connector
> + */
> +struct komeda_wb_connector {
> + /** @base: &drm_writeback_connector */
> + struct drm_writeback_connector base;
> +
> + /** @wb_layer: represents associated writeback pipeline of komeda */
> + struct komeda_layer *wb_layer;
> +};
> +
> +/**
> + * struct komeda_crtc
> + */
> +struct komeda_crtc {
> + /** @base: &drm_crtc */
> + struct drm_crtc base;
> + /** @master: only master has display output */
> + struct komeda_pipeline *master;
> + /**
> + * @slave: optional
> + *
> + * Doesn't have its own display output, the handled data flow will
> + * merge into the master.
> + */
> + struct komeda_pipeline *slave;
> +};
> +
> +/** struct komeda_crtc_state */
> +struct komeda_crtc_state {
> + /** @base: &drm_crtc_state */
> + struct drm_crtc_state base;
> +
> + /* private properties */
> +
> + /* computed state which are used by validate/check */
> + u32 affected_pipes;
> + u32 active_pipes;
> +};
> +
> +/** struct komeda_kms_dev - for gather KMS related things */
> +struct komeda_kms_dev {
> + /** @base: &drm_device */
> + struct drm_device base;
> +
> + /** @n_crtcs: valid numbers of crtcs in &komeda_kms_dev.crtcs */
> + int n_crtcs;
> + /** @crtcs: crtcs list */
> + struct komeda_crtc crtcs[KOMEDA_MAX_PIPELINES];
> +};
> +
> +#define to_kplane(p) container_of(p, struct komeda_plane, base)
> +#define to_kplane_st(p) container_of(p, struct komeda_plane_state, base)
> +#define to_kconn(p) container_of(p, struct komeda_wb_connector, base)
> +#define to_kcrtc(p) container_of(p, struct komeda_crtc, base)
> +#define to_kcrtc_st(p) container_of(p, struct komeda_crtc_state, base)
> +#define to_kdev(p) container_of(p, struct komeda_kms_dev, base)
> +
> +int komeda_kms_setup_crtcs(struct komeda_kms_dev *kms, struct komeda_dev *mdev);
> +
> +int komeda_kms_add_crtcs(struct komeda_kms_dev *kms, struct komeda_dev *mdev);
> +int komeda_kms_add_planes(struct komeda_kms_dev *kms, struct komeda_dev *mdev);
> +int komeda_kms_add_private_objs(struct komeda_kms_dev *kms,
> + struct komeda_dev *mdev);
> +void komeda_kms_cleanup_private_objs(struct komeda_dev *mdev);
> +
> +struct komeda_kms_dev *komeda_kms_attach(struct komeda_dev *mdev);
> +void komeda_kms_detach(struct komeda_kms_dev *kms);
> +
> +#endif /*_KOMEDA_KMS_H_*/
> diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_pipeline.h b/drivers/gpu/drm/arm/display/komeda/komeda_pipeline.h
> index 2d68ffeae25d..114129d96851 100644
> --- a/drivers/gpu/drm/arm/display/komeda/komeda_pipeline.h
> +++ b/drivers/gpu/drm/arm/display/komeda/komeda_pipeline.h
> @@ -333,6 +333,9 @@ struct komeda_pipeline_state {
> #define to_improc_st(c) container_of(c, struct komeda_improc_state, base)
> #define to_ctrlr_st(c) container_of(c, struct komeda_timing_ctrlr_state, base)
>
> +#define priv_to_comp_st(o) container_of(o, struct komeda_component_state, obj)
> +#define priv_to_pipe_st(o) container_of(o, struct komeda_pipeline_state, obj)
> +
> /* pipeline APIs */
> struct komeda_pipeline *
> komeda_pipeline_add(struct komeda_dev *mdev, size_t size,
> diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_plane.c b/drivers/gpu/drm/arm/display/komeda/komeda_plane.c
> new file mode 100644
> index 000000000000..0a4953a9a909
> --- /dev/null
> +++ b/drivers/gpu/drm/arm/display/komeda/komeda_plane.c
> @@ -0,0 +1,109 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * (C) COPYRIGHT 2018 ARM Limited. All rights reserved.
> + * Author: James.Qian.Wang <james.qian.wang@arm.com>
> + *
> + */
> +#include <drm/drm_atomic.h>
> +#include <drm/drm_atomic_helper.h>
> +#include <drm/drm_plane_helper.h>
> +#include "komeda_dev.h"
> +#include "komeda_kms.h"
> +
> +static const struct drm_plane_helper_funcs komeda_plane_helper_funcs = {
> +};
> +
> +static void komeda_plane_destroy(struct drm_plane *plane)
> +{
> + drm_plane_cleanup(plane);
> +
> + kfree(to_kplane(plane));
> +}
> +
> +static const struct drm_plane_funcs komeda_plane_funcs = {
> +};
> +
> +/* for komeda, which is pipeline can be share between crtcs */
> +static u32 get_possible_crtcs(struct komeda_kms_dev *kms,
> + struct komeda_pipeline *pipe)
> +{
> + struct komeda_crtc *crtc;
> + u32 possible_crtcs = 0;
> + int i;
> +
> + for (i = 0; i < kms->n_crtcs; i++) {
> + crtc = &kms->crtcs[i];
> +
> + if ((pipe == crtc->master) || (pipe == crtc->slave))
> + possible_crtcs |= BIT(i);
> + }
> +
> + return possible_crtcs;
> +}
> +
> +/* use Layer0 as primary */
> +static u32 get_plane_type(struct komeda_kms_dev *kms,
> + struct komeda_component *c)
> +{
> + bool is_primary = (c->id == KOMEDA_COMPONENT_LAYER0);
> +
> + return is_primary ? DRM_PLANE_TYPE_PRIMARY : DRM_PLANE_TYPE_OVERLAY;
> +}
> +
> +static int komeda_plane_add(struct komeda_kms_dev *kms,
> + struct komeda_layer *layer)
> +{
> + struct komeda_dev *mdev = kms->base.dev_private;
> + struct komeda_component *c = &layer->base;
> + struct komeda_plane *kplane;
> + struct drm_plane *plane;
> + u32 *formats, n_formats = 0;
> + int err;
> +
> + kplane = kzalloc(sizeof(*kplane), GFP_KERNEL);
> + if (!kplane)
> + return -ENOMEM;
> +
> + plane = &kplane->base;
> + kplane->layer = layer;
> +
> + formats = komeda_get_layer_fourcc_list(&mdev->fmt_tbl,
> + layer->layer_type, &n_formats);
> +
> + err = drm_universal_plane_init(&kms->base, plane,
> + get_possible_crtcs(kms, c->pipeline),
> + &komeda_plane_funcs,
> + formats, n_formats, NULL,
> + get_plane_type(kms, c),
> + "%s", c->name);
> +
> + komeda_put_fourcc_list(formats);
> +
> + if (err)
> + goto cleanup;
> +
> + drm_plane_helper_add(plane, &komeda_plane_helper_funcs);
> +
> + return 0;
> +cleanup:
> + komeda_plane_destroy(plane);
> + return err;
> +}
> +
> +int komeda_kms_add_planes(struct komeda_kms_dev *kms, struct komeda_dev *mdev)
> +{
> + struct komeda_pipeline *pipe;
> + int i, j, err;
> +
> + for (i = 0; i < mdev->n_pipelines; i++) {
> + pipe = mdev->pipelines[i];
> +
> + for (j = 0; j < pipe->n_layers; j++) {
> + err = komeda_plane_add(kms, pipe->layers[j]);
> + if (err)
> + return err;
> + }
> + }
> +
> + return 0;
> +}
> diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_private_obj.c b/drivers/gpu/drm/arm/display/komeda/komeda_private_obj.c
> new file mode 100644
> index 000000000000..9edfd6ab0c12
> --- /dev/null
> +++ b/drivers/gpu/drm/arm/display/komeda/komeda_private_obj.c
> @@ -0,0 +1,88 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * (C) COPYRIGHT 2018 ARM Limited. All rights reserved.
> + * Author: James.Qian.Wang <james.qian.wang@arm.com>
> + *
> + */
> +#include "komeda_dev.h"
> +#include "komeda_kms.h"
> +
> +static struct drm_private_state *
> +komeda_pipeline_atomic_duplicate_state(struct drm_private_obj *obj)
> +{
> + struct komeda_pipeline_state *st;
> +
> + st = kmemdup(obj->state, sizeof(*st), GFP_KERNEL);
> + if (!st)
> + return NULL;
> +
> + st->active_comps = 0;
> +
> + __drm_atomic_helper_private_obj_duplicate_state(obj, &st->obj);
> +
> + return &st->obj;
> +}
> +
> +static void
> +komeda_pipeline_atomic_destroy_state(struct drm_private_obj *obj,
> + struct drm_private_state *state)
> +{
> + kfree(priv_to_pipe_st(state));
> +}
> +
> +static const struct drm_private_state_funcs komeda_pipeline_obj_funcs = {
> + .atomic_duplicate_state = komeda_pipeline_atomic_duplicate_state,
> + .atomic_destroy_state = komeda_pipeline_atomic_destroy_state,
> +};
> +
> +static int komeda_pipeline_obj_add(struct komeda_kms_dev *kms,
> + struct komeda_pipeline *pipe)
> +{
> + struct komeda_pipeline_state *st;
> +
> + st = kzalloc(sizeof(*st), GFP_KERNEL);
> + if (!st)
> + return -ENOMEM;
> +
> + st->pipe = pipe;
> + drm_atomic_private_obj_init(&pipe->obj, &st->obj,
> + &komeda_pipeline_obj_funcs);
> +
> + return 0;
> +}
> +
> +int komeda_kms_add_private_objs(struct komeda_kms_dev *kms,
> + struct komeda_dev *mdev)
> +{
> + struct komeda_pipeline *pipe;
> + int i, err;
> +
> + for (i = 0; i < mdev->n_pipelines; i++) {
> + pipe = mdev->pipelines[i];
> +
> + err = komeda_pipeline_obj_add(kms, pipe);
> + if (err)
> + return err;
> +
> + /* Add component */
> + }
> +
> + return 0;
> +}
> +
> +void komeda_kms_cleanup_private_objs(struct komeda_dev *mdev)
> +{
> + struct komeda_pipeline *pipe;
> + struct komeda_component *c;
> + int i, id;
> +
> + for (i = 0; i < mdev->n_pipelines; i++) {
> + pipe = mdev->pipelines[i];
> + dp_for_each_set_bit(id, pipe->avail_comps) {
> + c = komeda_pipeline_get_component(pipe, id);
> +
> + drm_atomic_private_obj_fini(&c->obj);
> + }
> + drm_atomic_private_obj_fini(&pipe->obj);
> + }
> +}
> --
> 2.17.1
>

Reviewed-by: Liviu Dudau <liviu.dudau@arm.com>

Best regards,
Liviu


--
====================
| I would like to |
| fix the world, |
| but they're not |
| giving me the |
\ source code! /
---------------
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