On Wed, May 16, 2018 at 08:56:21PM -0300, Rodrigo Siqueira wrote:
> This commit adds the essential infrastructure for around CRTCs which
> is composed of: a new data struct for output data information, a
> function for creating planes, and a simple encoder attached to the
> connector. Finally, due to the introduction of a new initialization
> function, connectors were moved from vkms_drv.c to vkms_display.c.
>
> Signed-off-by: Rodrigo Siqueira <rodrigosiqueiramelo@xxxxxxxxx>
> ---
> drivers/gpu/drm/vkms/Makefile | 2 +-
> drivers/gpu/drm/vkms/vkms_crtc.c | 35 ++++++++++++
> drivers/gpu/drm/vkms/vkms_drv.c | 60 ++++++--------------
> drivers/gpu/drm/vkms/vkms_drv.h | 24 +++++++-
> drivers/gpu/drm/vkms/vkms_output.c | 91 ++++++++++++++++++++++++++++++
> drivers/gpu/drm/vkms/vkms_plane.c | 46 +++++++++++++++
> 6 files changed, 211 insertions(+), 47 deletions(-)
> create mode 100644 drivers/gpu/drm/vkms/vkms_crtc.c
> create mode 100644 drivers/gpu/drm/vkms/vkms_output.c
> create mode 100644 drivers/gpu/drm/vkms/vkms_plane.c
>
> diff --git a/drivers/gpu/drm/vkms/Makefile b/drivers/gpu/drm/vkms/Makefile
> index 2aef948d3a34..3f774a6a9c58 100644
> --- a/drivers/gpu/drm/vkms/Makefile
> +++ b/drivers/gpu/drm/vkms/Makefile
> @@ -1,3 +1,3 @@
> -vkms-y := vkms_drv.o
> +vkms-y := vkms_drv.o vkms_plane.o vkms_output.o vkms_crtc.o
>
> obj-$(CONFIG_DRM_VKMS) += vkms.o
> diff --git a/drivers/gpu/drm/vkms/vkms_crtc.c b/drivers/gpu/drm/vkms/vkms_crtc.c
> new file mode 100644
> index 000000000000..bf76cd39ece7
> --- /dev/null
> +++ b/drivers/gpu/drm/vkms/vkms_crtc.c
> @@ -0,0 +1,35 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License as published by
> + * the Free Software Foundation; either version 2 of the License, or
> + * (at your option) any later version.
> + */
> +
> +#include "vkms_drv.h"
> +#include <drm/drm_atomic_helper.h>
> +#include <drm/drm_crtc_helper.h>
> +
> +static const struct drm_crtc_funcs vkms_crtc_funcs = {
> + .set_config = drm_atomic_helper_set_config,
> + .destroy = drm_crtc_cleanup,
> + .page_flip = drm_atomic_helper_page_flip,
> + .reset = drm_atomic_helper_crtc_reset,
> + .atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state,
> + .atomic_destroy_state = drm_atomic_helper_crtc_destroy_state,
> +};
> +
> +int vkms_crtc_init(struct drm_device *dev, struct drm_crtc *crtc,
> + struct drm_plane *primary, struct drm_plane *cursor)
> +{
> + int ret;
> +
Just as a follow up, I have noticed that vkms breaks when inspecting
its state in the debugfs, also when running igt tests with kms and core
filters, and adding the following fixed that issue:
1) a drm_crtc_helper_funcs with dummy atomic_check.
> + ret = drm_crtc_init_with_planes(dev, crtc, primary, cursor,
> + &vkms_crtc_funcs, NULL);
> + if (ret) {
> + DRM_ERROR("Failed to init CRTC\n");
> + return ret;
> + }
> +
> + return ret;
> +}
> diff --git a/drivers/gpu/drm/vkms/vkms_drv.c b/drivers/gpu/drm/vkms/vkms_drv.c
> index aec3f180f96d..070613e32934 100644
> --- a/drivers/gpu/drm/vkms/vkms_drv.c
> +++ b/drivers/gpu/drm/vkms/vkms_drv.c
> @@ -6,7 +6,6 @@
> */
>
> #include <linux/module.h>
> -#include <drm/drmP.h>
> #include <drm/drm_gem.h>
> #include <drm/drm_crtc_helper.h>
> #include <drm/drm_atomic_helper.h>
> @@ -59,25 +58,24 @@ static struct drm_driver vkms_driver = {
> .minor = DRIVER_MINOR,
> };
>
> -static const u32 vkms_formats[] = {
> - DRM_FORMAT_XRGB8888,
> +static const struct drm_mode_config_funcs vkms_mode_funcs = {
> + .atomic_check = drm_atomic_helper_check,
> + .atomic_commit = drm_atomic_helper_commit,
> };
>
> -static void vkms_connector_destroy(struct drm_connector *connector)
> +static int vkms_modeset_init(struct vkms_device *vkmsdev)
> {
> - drm_connector_unregister(connector);
> - drm_connector_cleanup(connector);
> -}
> + struct drm_device *dev = &vkmsdev->drm;
>
> -static const struct drm_connector_funcs vkms_connector_funcs = {
> - .fill_modes = drm_helper_probe_single_connector_modes,
> - .destroy = vkms_connector_destroy,
> -};
> + drm_mode_config_init(dev);
> + dev->mode_config.funcs = &vkms_mode_funcs;
> + dev->mode_config.min_width = XRES_MIN;
> + dev->mode_config.min_height = YRES_MIN;
> + dev->mode_config.max_width = XRES_MAX;
> + dev->mode_config.max_height = YRES_MAX;
>
> -static const struct drm_mode_config_funcs vkms_mode_funcs = {
> - .atomic_check = drm_atomic_helper_check,
> - .atomic_commit = drm_atomic_helper_commit,
> -};
> + return vkms_output_init(vkmsdev);
> +}
>
> static int __init vkms_init(void)
> {
> @@ -98,48 +96,24 @@ static int __init vkms_init(void)
> goto out_fini;
> }
>
> - drm_mode_config_init(&vkms_device->drm);
> - vkms_device->drm.mode_config.funcs = &vkms_mode_funcs;
> - vkms_device->drm.mode_config.min_width = XRES_MIN;
> - vkms_device->drm.mode_config.min_height = YRES_MIN;
> - vkms_device->drm.mode_config.max_width = XRES_MAX;
> - vkms_device->drm.mode_config.max_height = YRES_MAX;
> -
> - ret = drm_connector_init(&vkms_device->drm, &vkms_device->connector,
> - &vkms_connector_funcs,
> - DRM_MODE_CONNECTOR_VIRTUAL);
> - if (ret < 0) {
> - DRM_ERROR("Failed to init connector\n");
> - goto out_unregister;
> - }
> -
> - ret = drm_simple_display_pipe_init(&vkms_device->drm,
> - &vkms_device->pipe,
> - NULL,
> - vkms_formats,
> - ARRAY_SIZE(vkms_formats),
> - NULL,
> - &vkms_device->connector);
> - if (ret < 0) {
> - DRM_ERROR("Cannot setup simple display pipe\n");
> + ret = vkms_modeset_init(vkms_device);
> + if (ret)
> goto out_unregister;
> - }
>
> ret = drm_dev_register(&vkms_device->drm, 0);
> if (ret)
> goto out_unregister;
>
> - drm_connector_register(&vkms_device->connector);
> -
> return 0;
>
> out_unregister:
> platform_device_unregister(vkms_device->platform);
> +
> out_fini:
> drm_dev_fini(&vkms_device->drm);
> +
> out_free:
> kfree(vkms_device);
> -
> return ret;
> }
>
> diff --git a/drivers/gpu/drm/vkms/vkms_drv.h b/drivers/gpu/drm/vkms/vkms_drv.h
> index c77c5bf5032a..b0f9d2e61a42 100644
> --- a/drivers/gpu/drm/vkms/vkms_drv.h
> +++ b/drivers/gpu/drm/vkms/vkms_drv.h
> @@ -1,13 +1,31 @@
> #ifndef _VKMS_DRV_H_
> #define _VKMS_DRV_H_
>
> -#include <drm/drm_simple_kms_helper.h>
> +#include <drm/drmP.h>
> +#include <drm/drm.h>
> +#include <drm/drm_encoder.h>
> +
> +static const u32 vkms_formats[] = {
> + DRM_FORMAT_XRGB8888,
> +};
> +
> +struct vkms_output {
> + struct drm_crtc crtc;
> + struct drm_encoder encoder;
> + struct drm_connector connector;
> +};
>
> struct vkms_device {
> struct drm_device drm;
> struct platform_device *platform;
> - struct drm_simple_display_pipe pipe;
> - struct drm_connector connector;
> + struct vkms_output output;
> };
>
> +int vkms_crtc_init(struct drm_device *dev, struct drm_crtc *crtc,
> + struct drm_plane *primary, struct drm_plane *cursor);
> +
> +int vkms_output_init(struct vkms_device *vkmsdev);
> +
> +struct drm_plane *vkms_plane_init(struct vkms_device *vkmsdev);
> +
> #endif /* _VKMS_DRV_H_ */
> diff --git a/drivers/gpu/drm/vkms/vkms_output.c b/drivers/gpu/drm/vkms/vkms_output.c
> new file mode 100644
> index 000000000000..48143eac3c12
> --- /dev/null
> +++ b/drivers/gpu/drm/vkms/vkms_output.c
> @@ -0,0 +1,91 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License as published by
> + * the Free Software Foundation; either version 2 of the License, or
> + * (at your option) any later version.
> + */
> +
> +#include "vkms_drv.h"
> +#include <drm/drm_crtc_helper.h>
> +
> +static void vkms_connector_destroy(struct drm_connector *connector)
> +{
> + drm_connector_unregister(connector);
> + drm_connector_cleanup(connector);
> +}
> +
> +static const struct drm_connector_funcs vkms_connector_funcs = {
> + .fill_modes = drm_helper_probe_single_connector_modes,
> + .destroy = vkms_connector_destroy,
2) adding the following hooks with their drm_atomic_helper_connector_*
counterpart to the vkms_connector_funcs:
atomic_duplicate_state, atomic_destroy_state, and reset.
> +};
> +
> +static const struct drm_encoder_funcs vkms_encoder_funcs = {
> + .destroy = drm_encoder_cleanup,
> +};
> +
> +int vkms_output_init(struct vkms_device *vkmsdev)
> +{
> + struct vkms_output *output = &vkmsdev->output;
> + struct drm_device *dev = &vkmsdev->drm;
> + struct drm_connector *connector = &output->connector;
> + struct drm_encoder *encoder = &output->encoder;
> + struct drm_crtc *crtc = &output->crtc;
> + struct drm_plane *primary;
> + int ret;
> +
> + primary = vkms_plane_init(vkmsdev);
> + if (IS_ERR(primary))
> + return PTR_ERR(primary);
> +
> + ret = vkms_crtc_init(dev, crtc, primary, NULL);
> + if (ret)
> + goto err_crtc;
> +
3) add drm_connector_helper_funcs with dummy {get_modes, mode_valid}.
> + ret = drm_connector_init(dev, connector, &vkms_connector_funcs,
> + DRM_MODE_CONNECTOR_VIRTUAL);
> + if (ret) {
> + DRM_ERROR("Failed to init connector\n");
> + goto err_connector;
> + }
> +
> + ret = drm_connector_register(connector);
> + if (ret) {
> + DRM_ERROR("Failed to register connector\n");
> + goto err_connector_register;
> + }
> +
> + ret = drm_encoder_init(dev, encoder, &vkms_encoder_funcs,
> + DRM_MODE_ENCODER_VIRTUAL, NULL);
> + if (ret) {
> + DRM_ERROR("Failed to init encoder\n");
> + goto err_encoder;
> + }
> + encoder->possible_crtcs = 1;
> +
> + ret = drm_mode_connector_attach_encoder(connector, encoder);
> + if (ret) {
> + DRM_ERROR("Failed to attach connector to encoder\n");
> + goto err_attach;
> + }
> +
> + drm_mode_config_reset(dev);
> +
> + return 0;
> +
> +err_attach:
> + drm_encoder_cleanup(encoder);
> +
> +err_encoder:
> + drm_connector_unregister(connector);
> +
> +err_connector_register:
> + drm_connector_cleanup(connector);
> +
> +err_connector:
> + drm_crtc_cleanup(crtc);
> +
> +err_crtc:
> + drm_plane_cleanup(primary);
> + return ret;
> +}
> diff --git a/drivers/gpu/drm/vkms/vkms_plane.c b/drivers/gpu/drm/vkms/vkms_plane.c
> new file mode 100644
> index 000000000000..2c25b1d6ab5b
> --- /dev/null
> +++ b/drivers/gpu/drm/vkms/vkms_plane.c
> @@ -0,0 +1,46 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License as published by
> + * the Free Software Foundation; either version 2 of the License, or
> + * (at your option) any later version.
> + */
> +
> +#include "vkms_drv.h"
> +#include <drm/drm_plane_helper.h>
> +#include <drm/drm_atomic_helper.h>
> +
> +static const struct drm_plane_funcs vkms_plane_funcs = {
> + .update_plane = drm_atomic_helper_update_plane,
> + .disable_plane = drm_atomic_helper_disable_plane,
> + .destroy = drm_plane_cleanup,
> + .reset = drm_atomic_helper_plane_reset,
> + .atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state,
> + .atomic_destroy_state = drm_atomic_helper_plane_destroy_state,
> +};
> +
> +struct drm_plane *vkms_plane_init(struct vkms_device *vkmsdev)
> +{
> + struct drm_device *dev = &vkmsdev->drm;
> + struct drm_plane *plane;
> + const u32 *formats;
> + int ret, nformats;
> +
> + plane = kzalloc(sizeof(*plane), GFP_KERNEL);
> + if (!plane)
> + return ERR_PTR(-ENOMEM);
> +
> + formats = vkms_formats;
> + nformats = ARRAY_SIZE(vkms_formats);
> +
> + ret = drm_universal_plane_init(dev, plane, 0,
> + &vkms_plane_funcs,
> + formats, nformats,
> + NULL, DRM_PLANE_TYPE_PRIMARY, NULL);
> + if (ret) {
> + kfree(plane);
> + return ERR_PTR(ret);
> + }
> +
4) add drm_plane_helper_funcs with dummy {atomic_check, prepare_fb, cleanup_fb}.
> + return plane;
> +}
> --
> 2.17.0
>
- Haneen
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