From d189835fffed7fed4aec15a41eaa27190ad4e04d Mon Sep 17 00:00:00 2001 From: Laurent Pinchart Date: Fri, 6 Aug 2021 14:29:52 +0300 Subject: [PATCH] drm: xlnx: zynqmp_dpsub: Decouple DRM device from zynqmp_dpsub To complete the decoupling of the DRM device from the zynqmp_dpsub, group all DRM-related structures in a zynqmp_dpsub_drm structure and allocate it separately from the zynqmp_dpsub. The DRM managed allocation of the drm_device now doesn't cover the zynqmp_dpsub anymore, so we need to register a cleanup action to release the zynqmp_dpsub when the drm_device is released. The will allow usage of the DisplayPort encoder as a standalone bridge, without registering a DRM device in this driver. Signed-off-by: Laurent Pinchart --- drivers/gpu/drm/xlnx/zynqmp_dpsub.c | 41 +++++++++++++---------- drivers/gpu/drm/xlnx/zynqmp_dpsub.h | 18 +++------- drivers/gpu/drm/xlnx/zynqmp_kms.c | 66 ++++++++++++++++++++++++++----------- drivers/gpu/drm/xlnx/zynqmp_kms.h | 24 +++++++++++++- 4 files changed, 99 insertions(+), 50 deletions(-) diff --git a/drivers/gpu/drm/xlnx/zynqmp_dpsub.c b/drivers/gpu/drm/xlnx/zynqmp_dpsub.c index 946f581..86faa6e 100644 --- a/drivers/gpu/drm/xlnx/zynqmp_dpsub.c +++ b/drivers/gpu/drm/xlnx/zynqmp_dpsub.c @@ -18,8 +18,6 @@ #include #include -#include -#include #include #include @@ -36,14 +34,20 @@ static int __maybe_unused zynqmp_dpsub_suspend(struct device *dev) { struct zynqmp_dpsub *dpsub = dev_get_drvdata(dev); - return drm_mode_config_helper_suspend(&dpsub->drm); + if (!dpsub->drm) + return 0; + + return drm_mode_config_helper_suspend(&dpsub->drm->dev); } static int __maybe_unused zynqmp_dpsub_resume(struct device *dev) { struct zynqmp_dpsub *dpsub = dev_get_drvdata(dev); - return drm_mode_config_helper_resume(&dpsub->drm); + if (!dpsub->drm) + return 0; + + return drm_mode_config_helper_resume(&dpsub->drm->dev); } static const struct dev_pm_ops zynqmp_dpsub_pm_ops = { @@ -138,12 +142,11 @@ static int zynqmp_dpsub_init_clocks(struct zynqmp_dpsub *dpsub) return 0; } -static void zynqmp_dpsub_release(struct drm_device *drm, void *res) +void zynqmp_dpsub_release(struct zynqmp_dpsub *dpsub) { - struct zynqmp_dpsub *dpsub = res; - kfree(dpsub->disp); kfree(dpsub->dp); + kfree(dpsub); } static int zynqmp_dpsub_probe(struct platform_device *pdev) @@ -152,14 +155,9 @@ static int zynqmp_dpsub_probe(struct platform_device *pdev) int ret; /* Allocate private data. */ - dpsub = devm_drm_dev_alloc(&pdev->dev, &zynqmp_dpsub_drm_driver, - struct zynqmp_dpsub, drm); - if (IS_ERR(dpsub)) - return PTR_ERR(dpsub); - - ret = drmm_add_action(&dpsub->drm, zynqmp_dpsub_release, dpsub); - if (ret < 0) - return ret; + dpsub = kzalloc(sizeof(*dpsub), GFP_KERNEL); + if (!dpsub) + return -ENOMEM; dpsub->dev = &pdev->dev; platform_set_drvdata(pdev, dpsub); @@ -204,6 +202,8 @@ err_pm: clk_disable_unprepare(dpsub->apb_clk); err_mem: of_reserved_mem_device_release(&pdev->dev); + if (!dpsub->drm) + zynqmp_dpsub_release(dpsub); return ret; } @@ -211,7 +211,8 @@ static int zynqmp_dpsub_remove(struct platform_device *pdev) { struct zynqmp_dpsub *dpsub = platform_get_drvdata(pdev); - zynqmp_dpsub_drm_cleanup(dpsub); + if (dpsub->drm) + zynqmp_dpsub_drm_cleanup(dpsub); zynqmp_disp_remove(dpsub); zynqmp_dp_remove(dpsub); @@ -220,6 +221,9 @@ static int zynqmp_dpsub_remove(struct platform_device *pdev) clk_disable_unprepare(dpsub->apb_clk); of_reserved_mem_device_release(&pdev->dev); + if (!dpsub->drm) + zynqmp_dpsub_release(dpsub); + return 0; } @@ -227,7 +231,10 @@ static void zynqmp_dpsub_shutdown(struct platform_device *pdev) { struct zynqmp_dpsub *dpsub = platform_get_drvdata(pdev); - drm_atomic_helper_shutdown(&dpsub->drm); + if (!dpsub->drm) + return; + + drm_atomic_helper_shutdown(&dpsub->drm->dev); } static const struct of_device_id zynqmp_dpsub_of_match[] = { diff --git a/drivers/gpu/drm/xlnx/zynqmp_dpsub.h b/drivers/gpu/drm/xlnx/zynqmp_dpsub.h index 012dd05..6c6029a 100644 --- a/drivers/gpu/drm/xlnx/zynqmp_dpsub.h +++ b/drivers/gpu/drm/xlnx/zynqmp_dpsub.h @@ -12,17 +12,13 @@ #ifndef _ZYNQMP_DPSUB_H_ #define _ZYNQMP_DPSUB_H_ -#include -#include -#include - struct clk; struct device; struct drm_bridge; -struct drm_device; struct zynqmp_disp; struct zynqmp_disp_layer; struct zynqmp_dp; +struct zynqmp_dpsub_drm; #define ZYNQMP_DPSUB_NUM_LAYERS 2 @@ -35,23 +31,19 @@ enum zynqmp_dpsub_format { /** * struct zynqmp_dpsub - ZynqMP DisplayPort Subsystem - * @drm: The DRM/KMS device * @dev: The physical device * @apb_clk: The APB clock * @vid_clk: Video clock * @vid_clk_from_ps: True of the video clock comes from PS, false from PL * @aud_clk: Audio clock * @aud_clk_from_ps: True of the audio clock comes from PS, false from PL - * @planes: The DRM planes - * @crtc: The DRM CRTC - * @encoder: The dummy DRM encoder + * @drm: The DRM/KMS device data * @bridge: The DP encoder bridge * @disp: The display controller * @dp: The DisplayPort controller * @dma_align: DMA alignment constraint (must be a power of 2) */ struct zynqmp_dpsub { - struct drm_device drm; struct device *dev; struct clk *apb_clk; @@ -60,9 +52,7 @@ struct zynqmp_dpsub { struct clk *aud_clk; bool aud_clk_from_ps; - struct drm_plane planes[ZYNQMP_DPSUB_NUM_LAYERS]; - struct drm_crtc crtc; - struct drm_encoder encoder; + struct zynqmp_dpsub_drm *drm; struct drm_bridge *bridge; struct zynqmp_disp *disp; @@ -75,4 +65,6 @@ struct zynqmp_dpsub { bool zynqmp_dpsub_audio_enabled(struct zynqmp_dpsub *dpsub); unsigned int zynqmp_dpsub_get_audio_clk_rate(struct zynqmp_dpsub *dpsub); +void zynqmp_dpsub_release(struct zynqmp_dpsub *dpsub); + #endif /* _ZYNQMP_DPSUB_H_ */ diff --git a/drivers/gpu/drm/xlnx/zynqmp_kms.c b/drivers/gpu/drm/xlnx/zynqmp_kms.c index 7e59f30..1ac8180 100644 --- a/drivers/gpu/drm/xlnx/zynqmp_kms.c +++ b/drivers/gpu/drm/xlnx/zynqmp_kms.c @@ -44,7 +44,7 @@ static inline struct zynqmp_dpsub *to_zynqmp_dpsub(struct drm_device *drm) { - return container_of(drm, struct zynqmp_dpsub, drm); + return container_of(drm, struct zynqmp_dpsub_drm, dev)->dpsub; } /* ----------------------------------------------------------------------------- @@ -146,9 +146,9 @@ static int zynqmp_dpsub_create_planes(struct zynqmp_dpsub *dpsub) unsigned int i; int ret; - for (i = 0; i < ARRAY_SIZE(dpsub->planes); i++) { + for (i = 0; i < ARRAY_SIZE(dpsub->drm->planes); i++) { struct zynqmp_disp_layer *layer = dpsub->layers[i]; - struct drm_plane *plane = &dpsub->planes[i]; + struct drm_plane *plane = &dpsub->drm->planes[i]; enum drm_plane_type type; unsigned int num_formats; u32 *formats; @@ -160,7 +160,7 @@ static int zynqmp_dpsub_create_planes(struct zynqmp_dpsub *dpsub) /* Graphics layer is primary, and video layer is overlay. */ type = i == ZYNQMP_DPSUB_LAYER_VID ? DRM_PLANE_TYPE_OVERLAY : DRM_PLANE_TYPE_PRIMARY; - ret = drm_universal_plane_init(&dpsub->drm, plane, 0, + ret = drm_universal_plane_init(&dpsub->drm->dev, plane, 0, &zynqmp_dpsub_plane_funcs, formats, num_formats, NULL, type, NULL); @@ -184,7 +184,7 @@ static int zynqmp_dpsub_create_planes(struct zynqmp_dpsub *dpsub) static inline struct zynqmp_dpsub *crtc_to_dpsub(struct drm_crtc *crtc) { - return container_of(crtc, struct zynqmp_dpsub, crtc); + return container_of(crtc, struct zynqmp_dpsub_drm, crtc)->dpsub; } static void zynqmp_dpsub_crtc_atomic_enable(struct drm_crtc *crtc, @@ -312,11 +312,11 @@ static const struct drm_crtc_funcs zynqmp_dpsub_crtc_funcs = { static int zynqmp_dpsub_create_crtc(struct zynqmp_dpsub *dpsub) { - struct drm_plane *plane = &dpsub->planes[ZYNQMP_DPSUB_LAYER_GFX]; - struct drm_crtc *crtc = &dpsub->crtc; + struct drm_plane *plane = &dpsub->drm->planes[ZYNQMP_DPSUB_LAYER_GFX]; + struct drm_crtc *crtc = &dpsub->drm->crtc; int ret; - ret = drm_crtc_init_with_planes(&dpsub->drm, crtc, plane, + ret = drm_crtc_init_with_planes(&dpsub->drm->dev, crtc, plane, NULL, &zynqmp_dpsub_crtc_funcs, NULL); if (ret < 0) return ret; @@ -331,11 +331,11 @@ static int zynqmp_dpsub_create_crtc(struct zynqmp_dpsub *dpsub) static void zynqmp_dpsub_map_crtc_to_plane(struct zynqmp_dpsub *dpsub) { - u32 possible_crtcs = drm_crtc_mask(&dpsub->crtc); + u32 possible_crtcs = drm_crtc_mask(&dpsub->drm->crtc); unsigned int i; - for (i = 0; i < ARRAY_SIZE(dpsub->planes); i++) - dpsub->planes[i].possible_crtcs = possible_crtcs; + for (i = 0; i < ARRAY_SIZE(dpsub->drm->planes); i++) + dpsub->drm->planes[i].possible_crtcs = possible_crtcs; } /** @@ -347,7 +347,7 @@ static void zynqmp_dpsub_map_crtc_to_plane(struct zynqmp_dpsub *dpsub) */ void zynqmp_dpsub_handle_vblank(struct zynqmp_dpsub *dpsub) { - drm_crtc_handle_vblank(&dpsub->crtc); + drm_crtc_handle_vblank(&dpsub->drm->crtc); } /* ----------------------------------------------------------------------------- @@ -394,7 +394,7 @@ static const struct drm_mode_config_funcs zynqmp_dpsub_mode_config_funcs = { DEFINE_DRM_GEM_DMA_FOPS(zynqmp_dpsub_drm_fops); -const struct drm_driver zynqmp_dpsub_drm_driver = { +static const struct drm_driver zynqmp_dpsub_drm_driver = { .driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_ATOMIC, @@ -411,7 +411,7 @@ const struct drm_driver zynqmp_dpsub_drm_driver = { static int zynqmp_dpsub_kms_init(struct zynqmp_dpsub *dpsub) { - struct drm_encoder *encoder = &dpsub->encoder; + struct drm_encoder *encoder = &dpsub->drm->encoder; struct drm_connector *connector; int ret; @@ -427,8 +427,8 @@ static int zynqmp_dpsub_kms_init(struct zynqmp_dpsub *dpsub) zynqmp_dpsub_map_crtc_to_plane(dpsub); /* Create the encoder and attach the bridge. */ - encoder->possible_crtcs |= drm_crtc_mask(&dpsub->crtc); - drm_simple_encoder_init(&dpsub->drm, encoder, DRM_MODE_ENCODER_NONE); + encoder->possible_crtcs |= drm_crtc_mask(&dpsub->drm->crtc); + drm_simple_encoder_init(&dpsub->drm->dev, encoder, DRM_MODE_ENCODER_NONE); ret = drm_bridge_attach(encoder, dpsub->bridge, NULL, DRM_BRIDGE_ATTACH_NO_CONNECTOR); @@ -438,7 +438,7 @@ static int zynqmp_dpsub_kms_init(struct zynqmp_dpsub *dpsub) } /* Create the connector for the chain of bridges. */ - connector = drm_bridge_connector_init(&dpsub->drm, encoder); + connector = drm_bridge_connector_init(&dpsub->drm->dev, encoder); if (IS_ERR(connector)) { dev_err(dpsub->dev, "failed to created connector\n"); return PTR_ERR(connector); @@ -453,11 +453,39 @@ static int zynqmp_dpsub_kms_init(struct zynqmp_dpsub *dpsub) return 0; } +static void zynqmp_dpsub_drm_release(struct drm_device *drm, void *res) +{ + struct zynqmp_dpsub_drm *dpdrm = res; + + zynqmp_dpsub_release(dpdrm->dpsub); +} + int zynqmp_dpsub_drm_init(struct zynqmp_dpsub *dpsub) { - struct drm_device *drm = &dpsub->drm; + struct zynqmp_dpsub_drm *dpdrm; + struct drm_device *drm; int ret; + /* + * Allocate the drm_device and immediately add a cleanup action to + * release the zynqmp_dpsub instance. If any of those operations fail, + * dpsub->drm will remain NULL, which tells the caller that it must + * cleanup manually. + */ + dpdrm = devm_drm_dev_alloc(dpsub->dev, &zynqmp_dpsub_drm_driver, + struct zynqmp_dpsub_drm, dev); + if (IS_ERR(dpdrm)) + return PTR_ERR(dpdrm); + + dpdrm->dpsub = dpsub; + drm = &dpdrm->dev; + + ret = drmm_add_action(drm, zynqmp_dpsub_drm_release, dpdrm); + if (ret < 0) + return ret; + + dpsub->drm = dpdrm; + /* Initialize mode config, vblank and the KMS poll helper. */ ret = drmm_mode_config_init(drm); if (ret < 0) @@ -498,7 +526,7 @@ err_poll_fini: void zynqmp_dpsub_drm_cleanup(struct zynqmp_dpsub *dpsub) { - struct drm_device *drm = &dpsub->drm; + struct drm_device *drm = &dpsub->drm->dev; drm_dev_unregister(drm); drm_atomic_helper_shutdown(drm); diff --git a/drivers/gpu/drm/xlnx/zynqmp_kms.h b/drivers/gpu/drm/xlnx/zynqmp_kms.h index 8074148..b5cb271 100644 --- a/drivers/gpu/drm/xlnx/zynqmp_kms.h +++ b/drivers/gpu/drm/xlnx/zynqmp_kms.h @@ -12,9 +12,31 @@ #ifndef _ZYNQMP_KMS_H_ #define _ZYNQMP_KMS_H_ +#include +#include +#include +#include + +#include "zynqmp_dpsub.h" + struct zynqmp_dpsub; -extern const struct drm_driver zynqmp_dpsub_drm_driver; +/** + * struct zynqmp_dpsub - ZynqMP DisplayPort Subsystem DRM/KMS data + * @dpsub: Backpointer to the DisplayPort subsystem + * @drm: The DRM/KMS device + * @planes: The DRM planes + * @crtc: The DRM CRTC + * @encoder: The dummy DRM encoder + */ +struct zynqmp_dpsub_drm { + struct zynqmp_dpsub *dpsub; + + struct drm_device dev; + struct drm_plane planes[ZYNQMP_DPSUB_NUM_LAYERS]; + struct drm_crtc crtc; + struct drm_encoder encoder; +}; void zynqmp_dpsub_handle_vblank(struct zynqmp_dpsub *dpsub); -- 2.7.4