mirror of https://gitee.com/openkylin/linux.git
staging: drm/imx: Add i.MX drm core support
This patch adds the i.MX glue stuff between i.MX and drm. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Sascha Hauer
Greg Kroah-Hartman
parent
f34170c762
commit
e692da4d0e
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@ -140,4 +140,6 @@ source "drivers/staging/silicom/Kconfig"
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source "drivers/staging/ced1401/Kconfig"
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source "drivers/staging/imx-drm/Kconfig"
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endif # STAGING
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@ -62,3 +62,4 @@ obj-$(CONFIG_OMAP_BANDGAP) += omap-thermal/
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obj-$(CONFIG_ZCACHE2) += ramster/
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obj-$(CONFIG_NET_VENDOR_SILICOM) += silicom/
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obj-$(CONFIG_CED1401) += ced1401/
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obj-$(CONFIG_DRM_IMX) += imx-drm/
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@ -0,0 +1,17 @@
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config DRM_IMX
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tristate "DRM Support for Freescale i.MX"
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select DRM_KMS_HELPER
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select DRM_GEM_CMA_HELPER
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select DRM_KMS_CMA_HELPER
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depends on DRM && ARCH_MXC
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help
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enable i.MX graphics support
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config DRM_IMX_FB_HELPER
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tristate "provide legacy framebuffer /dev/fb0"
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select DRM_KMS_CMA_HELPER
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depends on DRM_IMX
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help
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The DRM framework can provide a legacy /dev/fb0 framebuffer
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for your device. This is necessary to get a framebuffer console
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and also for appplications using the legacy framebuffer API
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@ -0,0 +1,6 @@
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imxdrm-objs := imx-drm-core.o imx-fb.o
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obj-$(CONFIG_DRM_IMX) += imxdrm.o
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obj-$(CONFIG_DRM_IMX_FB_HELPER) += imx-fbdev.o
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@ -0,0 +1,882 @@
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/*
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* Freescale i.MX drm driver
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*
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* Copyright (C) 2011 Sascha Hauer, Pengutronix
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*/
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#include <linux/device.h>
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#include <linux/platform_device.h>
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#include <drm/drmP.h>
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#include <drm/drm_fb_helper.h>
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#include <drm/drm_crtc_helper.h>
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#include <linux/fb.h>
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#include <linux/module.h>
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#include <drm/drm_gem_cma_helper.h>
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#include <drm/drm_fb_cma_helper.h>
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#include "imx-drm.h"
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#define MAX_CRTC 4
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struct crtc_cookie {
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void *cookie;
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int id;
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struct list_head list;
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};
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struct imx_drm_device {
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struct drm_device *drm;
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struct device *dev;
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struct list_head crtc_list;
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struct list_head encoder_list;
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struct list_head connector_list;
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struct mutex mutex;
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int references;
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int pipes;
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struct drm_fbdev_cma *fbhelper;
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};
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struct imx_drm_crtc {
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struct drm_crtc *crtc;
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struct list_head list;
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struct imx_drm_device *imxdrm;
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int pipe;
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struct imx_drm_crtc_helper_funcs imx_drm_helper_funcs;
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struct module *owner;
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struct crtc_cookie cookie;
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};
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struct imx_drm_encoder {
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struct drm_encoder *encoder;
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struct list_head list;
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struct module *owner;
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struct list_head possible_crtcs;
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};
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struct imx_drm_connector {
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struct drm_connector *connector;
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struct list_head list;
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struct module *owner;
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};
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static int imx_drm_driver_firstopen(struct drm_device *drm)
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{
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if (!imx_drm_device_get())
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return -EINVAL;
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return 0;
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}
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static void imx_drm_driver_lastclose(struct drm_device *drm)
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{
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struct imx_drm_device *imxdrm = drm->dev_private;
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if (imxdrm->fbhelper)
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drm_fbdev_cma_restore_mode(imxdrm->fbhelper);
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imx_drm_device_put();
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}
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static int imx_drm_driver_unload(struct drm_device *drm)
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{
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struct imx_drm_device *imxdrm = drm->dev_private;
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drm_mode_config_cleanup(imxdrm->drm);
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drm_kms_helper_poll_fini(imxdrm->drm);
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return 0;
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}
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/*
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* We don't care at all for crtc numbers, but the core expects the
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* crtcs to be numbered
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*/
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static struct imx_drm_crtc *imx_drm_crtc_by_num(struct imx_drm_device *imxdrm,
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int num)
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{
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struct imx_drm_crtc *imx_drm_crtc;
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list_for_each_entry(imx_drm_crtc, &imxdrm->crtc_list, list)
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if (imx_drm_crtc->pipe == num)
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return imx_drm_crtc;
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return NULL;
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}
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int imx_drm_crtc_panel_format(struct drm_crtc *crtc, u32 encoder_type,
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u32 interface_pix_fmt)
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{
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struct imx_drm_device *imxdrm = crtc->dev->dev_private;
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struct imx_drm_crtc *imx_crtc;
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struct imx_drm_crtc_helper_funcs *helper;
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mutex_lock(&imxdrm->mutex);
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list_for_each_entry(imx_crtc, &imxdrm->crtc_list, list)
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if (imx_crtc->crtc == crtc)
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goto found;
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mutex_unlock(&imxdrm->mutex);
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return -EINVAL;
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found:
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mutex_unlock(&imxdrm->mutex);
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helper = &imx_crtc->imx_drm_helper_funcs;
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if (helper->set_interface_pix_fmt)
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return helper->set_interface_pix_fmt(crtc,
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encoder_type, interface_pix_fmt);
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return 0;
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}
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int imx_drm_crtc_vblank_get(struct imx_drm_crtc *imx_drm_crtc)
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{
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return drm_vblank_get(imx_drm_crtc->imxdrm->drm, imx_drm_crtc->pipe);
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}
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EXPORT_SYMBOL_GPL(imx_drm_crtc_vblank_get);
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void imx_drm_crtc_vblank_put(struct imx_drm_crtc *imx_drm_crtc)
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{
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drm_vblank_put(imx_drm_crtc->imxdrm->drm, imx_drm_crtc->pipe);
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}
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EXPORT_SYMBOL_GPL(imx_drm_crtc_vblank_put);
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void imx_drm_handle_vblank(struct imx_drm_crtc *imx_drm_crtc)
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{
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drm_handle_vblank(imx_drm_crtc->imxdrm->drm, imx_drm_crtc->pipe);
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}
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EXPORT_SYMBOL_GPL(imx_drm_handle_vblank);
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static int imx_drm_enable_vblank(struct drm_device *drm, int crtc)
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{
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struct imx_drm_device *imxdrm = drm->dev_private;
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struct imx_drm_crtc *imx_drm_crtc;
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int ret;
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imx_drm_crtc = imx_drm_crtc_by_num(imxdrm, crtc);
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if (!imx_drm_crtc)
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return -EINVAL;
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if (!imx_drm_crtc->imx_drm_helper_funcs.enable_vblank)
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return -ENOSYS;
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ret = imx_drm_crtc->imx_drm_helper_funcs.enable_vblank(
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imx_drm_crtc->crtc);
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return ret;
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}
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static void imx_drm_disable_vblank(struct drm_device *drm, int crtc)
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{
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struct imx_drm_device *imxdrm = drm->dev_private;
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struct imx_drm_crtc *imx_drm_crtc;
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imx_drm_crtc = imx_drm_crtc_by_num(imxdrm, crtc);
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if (!imx_drm_crtc)
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return;
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if (!imx_drm_crtc->imx_drm_helper_funcs.disable_vblank)
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return;
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imx_drm_crtc->imx_drm_helper_funcs.disable_vblank(imx_drm_crtc->crtc);
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}
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static const struct file_operations imx_drm_driver_fops = {
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.owner = THIS_MODULE,
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.open = drm_open,
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.release = drm_release,
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.unlocked_ioctl = drm_ioctl,
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.mmap = drm_gem_cma_mmap,
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.poll = drm_poll,
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.fasync = drm_fasync,
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.read = drm_read,
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.llseek = noop_llseek,
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};
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static struct imx_drm_device *imx_drm_device;
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static struct imx_drm_device *__imx_drm_device(void)
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{
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return imx_drm_device;
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}
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struct drm_device *imx_drm_device_get(void)
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{
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struct imx_drm_device *imxdrm = __imx_drm_device();
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struct imx_drm_encoder *enc;
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struct imx_drm_connector *con;
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struct imx_drm_crtc *crtc;
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mutex_lock(&imxdrm->mutex);
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list_for_each_entry(enc, &imxdrm->encoder_list, list) {
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if (!try_module_get(enc->owner)) {
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dev_err(imxdrm->dev, "could not get module %s\n",
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module_name(enc->owner));
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goto unwind_enc;
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}
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}
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list_for_each_entry(con, &imxdrm->connector_list, list) {
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if (!try_module_get(con->owner)) {
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dev_err(imxdrm->dev, "could not get module %s\n",
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module_name(con->owner));
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goto unwind_con;
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}
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}
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list_for_each_entry(crtc, &imxdrm->crtc_list, list) {
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if (!try_module_get(crtc->owner)) {
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dev_err(imxdrm->dev, "could not get module %s\n",
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module_name(crtc->owner));
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goto unwind_crtc;
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}
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}
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imxdrm->references++;
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mutex_unlock(&imxdrm->mutex);
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return imxdrm->drm;
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unwind_crtc:
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list_for_each_entry_continue_reverse(crtc, &imxdrm->crtc_list, list)
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module_put(crtc->owner);
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unwind_con:
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list_for_each_entry_continue_reverse(con, &imxdrm->connector_list, list)
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module_put(con->owner);
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unwind_enc:
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list_for_each_entry_continue_reverse(enc, &imxdrm->encoder_list, list)
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module_put(enc->owner);
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mutex_unlock(&imxdrm->mutex);
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return NULL;
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}
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EXPORT_SYMBOL_GPL(imx_drm_device_get);
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void imx_drm_device_put(void)
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{
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struct imx_drm_device *imxdrm = __imx_drm_device();
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struct imx_drm_encoder *enc;
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struct imx_drm_connector *con;
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struct imx_drm_crtc *crtc;
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mutex_lock(&imxdrm->mutex);
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list_for_each_entry(crtc, &imxdrm->crtc_list, list)
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module_put(crtc->owner);
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list_for_each_entry(con, &imxdrm->connector_list, list)
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module_put(con->owner);
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list_for_each_entry(enc, &imxdrm->encoder_list, list)
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module_put(enc->owner);
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imxdrm->references--;
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mutex_unlock(&imxdrm->mutex);
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}
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EXPORT_SYMBOL_GPL(imx_drm_device_put);
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static int drm_mode_group_reinit(struct drm_device *dev)
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{
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struct drm_mode_group *group = &dev->primary->mode_group;
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uint32_t *id_list = group->id_list;
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int ret;
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ret = drm_mode_group_init_legacy_group(dev, group);
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if (ret < 0)
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return ret;
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kfree(id_list);
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return 0;
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}
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/*
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* register an encoder to the drm core
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*/
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static int imx_drm_encoder_register(struct imx_drm_encoder *imx_drm_encoder)
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{
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struct imx_drm_device *imxdrm = __imx_drm_device();
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INIT_LIST_HEAD(&imx_drm_encoder->possible_crtcs);
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drm_encoder_init(imxdrm->drm, imx_drm_encoder->encoder,
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imx_drm_encoder->encoder->funcs,
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imx_drm_encoder->encoder->encoder_type);
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drm_mode_group_reinit(imxdrm->drm);
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return 0;
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}
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/*
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* unregister an encoder from the drm core
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*/
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static void imx_drm_encoder_unregister(struct imx_drm_encoder
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*imx_drm_encoder)
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{
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struct imx_drm_device *imxdrm = __imx_drm_device();
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drm_encoder_cleanup(imx_drm_encoder->encoder);
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drm_mode_group_reinit(imxdrm->drm);
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}
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/*
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* register a connector to the drm core
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*/
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static int imx_drm_connector_register(
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struct imx_drm_connector *imx_drm_connector)
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{
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struct imx_drm_device *imxdrm = __imx_drm_device();
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drm_connector_init(imxdrm->drm, imx_drm_connector->connector,
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imx_drm_connector->connector->funcs,
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imx_drm_connector->connector->connector_type);
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drm_mode_group_reinit(imxdrm->drm);
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return drm_sysfs_connector_add(imx_drm_connector->connector);
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}
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/*
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* unregister a connector from the drm core
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*/
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static void imx_drm_connector_unregister(
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struct imx_drm_connector *imx_drm_connector)
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{
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struct imx_drm_device *imxdrm = __imx_drm_device();
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drm_sysfs_connector_remove(imx_drm_connector->connector);
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drm_connector_cleanup(imx_drm_connector->connector);
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drm_mode_group_reinit(imxdrm->drm);
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}
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/*
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* register a crtc to the drm core
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*/
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static int imx_drm_crtc_register(struct imx_drm_crtc *imx_drm_crtc)
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{
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struct imx_drm_device *imxdrm = __imx_drm_device();
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int ret;
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drm_crtc_init(imxdrm->drm, imx_drm_crtc->crtc,
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imx_drm_crtc->imx_drm_helper_funcs.crtc_funcs);
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ret = drm_mode_crtc_set_gamma_size(imx_drm_crtc->crtc, 256);
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if (ret)
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return ret;
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drm_crtc_helper_add(imx_drm_crtc->crtc,
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imx_drm_crtc->imx_drm_helper_funcs.crtc_helper_funcs);
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drm_mode_group_reinit(imxdrm->drm);
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return 0;
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}
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/*
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* Called by the CRTC driver when all CRTCs are registered. This
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* puts all the pieces together and initializes the driver.
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* Once this is called no more CRTCs can be registered since
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* the drm core has hardcoded the number of crtcs in several
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* places.
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*/
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static int imx_drm_driver_load(struct drm_device *drm, unsigned long flags)
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{
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struct imx_drm_device *imxdrm = __imx_drm_device();
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int ret;
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imxdrm->drm = drm;
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drm->dev_private = imxdrm;
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/*
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* enable drm irq mode.
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* - with irq_enabled = 1, we can use the vblank feature.
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*
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* P.S. note that we wouldn't use drm irq handler but
|
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* just specific driver own one instead because
|
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* drm framework supports only one irq handler and
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* drivers can well take care of their interrupts
|
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*/
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drm->irq_enabled = 1;
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drm_mode_config_init(drm);
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imx_drm_mode_config_init(drm);
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mutex_lock(&imxdrm->mutex);
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drm_kms_helper_poll_init(imxdrm->drm);
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/* setup the grouping for the legacy output */
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ret = drm_mode_group_init_legacy_group(imxdrm->drm,
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&imxdrm->drm->primary->mode_group);
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if (ret)
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goto err_init;
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ret = drm_vblank_init(imxdrm->drm, MAX_CRTC);
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if (ret)
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goto err_init;
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/*
|
||||
* with vblank_disable_allowed = 1, vblank interrupt will be disabled
|
||||
* by drm timer once a current process gives up ownership of
|
||||
* vblank event.(after drm_vblank_put function is called)
|
||||
*/
|
||||
imxdrm->drm->vblank_disable_allowed = 1;
|
||||
|
||||
ret = 0;
|
||||
|
||||
err_init:
|
||||
mutex_unlock(&imxdrm->mutex);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static void imx_drm_update_possible_crtcs(void)
|
||||
{
|
||||
struct imx_drm_device *imxdrm = __imx_drm_device();
|
||||
struct imx_drm_crtc *imx_drm_crtc;
|
||||
struct imx_drm_encoder *enc;
|
||||
struct crtc_cookie *cookie;
|
||||
|
||||
list_for_each_entry(enc, &imxdrm->encoder_list, list) {
|
||||
u32 possible_crtcs = 0;
|
||||
|
||||
list_for_each_entry(cookie, &enc->possible_crtcs, list) {
|
||||
list_for_each_entry(imx_drm_crtc, &imxdrm->crtc_list, list) {
|
||||
if (imx_drm_crtc->cookie.cookie == cookie->cookie &&
|
||||
imx_drm_crtc->cookie.id == cookie->id) {
|
||||
possible_crtcs |= 1 << imx_drm_crtc->pipe;
|
||||
}
|
||||
}
|
||||
}
|
||||
enc->encoder->possible_crtcs = possible_crtcs;
|
||||
enc->encoder->possible_clones = possible_crtcs;
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
* imx_drm_add_crtc - add a new crtc
|
||||
*
|
||||
* The return value if !NULL is a cookie for the caller to pass to
|
||||
* imx_drm_remove_crtc later.
|
||||
*/
|
||||
int imx_drm_add_crtc(struct drm_crtc *crtc,
|
||||
struct imx_drm_crtc **new_crtc,
|
||||
const struct imx_drm_crtc_helper_funcs *imx_drm_helper_funcs,
|
||||
struct module *owner, void *cookie, int id)
|
||||
{
|
||||
struct imx_drm_device *imxdrm = __imx_drm_device();
|
||||
struct imx_drm_crtc *imx_drm_crtc;
|
||||
const struct drm_crtc_funcs *crtc_funcs;
|
||||
int ret;
|
||||
|
||||
mutex_lock(&imxdrm->mutex);
|
||||
|
||||
if (imxdrm->references) {
|
||||
ret = -EBUSY;
|
||||
goto err_busy;
|
||||
}
|
||||
|
||||
imx_drm_crtc = kzalloc(sizeof(*imx_drm_crtc), GFP_KERNEL);
|
||||
if (!imx_drm_crtc) {
|
||||
ret = -ENOMEM;
|
||||
goto err_alloc;
|
||||
}
|
||||
|
||||
imx_drm_crtc->imx_drm_helper_funcs = *imx_drm_helper_funcs;
|
||||
imx_drm_crtc->pipe = imxdrm->pipes++;
|
||||
imx_drm_crtc->cookie.cookie = cookie;
|
||||
imx_drm_crtc->cookie.id = id;
|
||||
|
||||
crtc_funcs = imx_drm_helper_funcs->crtc_funcs;
|
||||
|
||||
imx_drm_crtc->crtc = crtc;
|
||||
imx_drm_crtc->imxdrm = imxdrm;
|
||||
|
||||
imx_drm_crtc->owner = owner;
|
||||
|
||||
list_add_tail(&imx_drm_crtc->list, &imxdrm->crtc_list);
|
||||
|
||||
*new_crtc = imx_drm_crtc;
|
||||
|
||||
ret = imx_drm_crtc_register(imx_drm_crtc);
|
||||
if (ret)
|
||||
goto err_register;
|
||||
|
||||
imx_drm_update_possible_crtcs();
|
||||
|
||||
mutex_unlock(&imxdrm->mutex);
|
||||
|
||||
return 0;
|
||||
|
||||
err_register:
|
||||
kfree(imx_drm_crtc);
|
||||
err_alloc:
|
||||
err_busy:
|
||||
mutex_unlock(&imxdrm->mutex);
|
||||
return ret;
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(imx_drm_add_crtc);
|
||||
|
||||
/*
|
||||
* imx_drm_remove_crtc - remove a crtc
|
||||
*/
|
||||
int imx_drm_remove_crtc(struct imx_drm_crtc *imx_drm_crtc)
|
||||
{
|
||||
struct imx_drm_device *imxdrm = imx_drm_crtc->imxdrm;
|
||||
|
||||
mutex_lock(&imxdrm->mutex);
|
||||
|
||||
drm_crtc_cleanup(imx_drm_crtc->crtc);
|
||||
|
||||
list_del(&imx_drm_crtc->list);
|
||||
|
||||
drm_mode_group_reinit(imxdrm->drm);
|
||||
|
||||
mutex_unlock(&imxdrm->mutex);
|
||||
|
||||
kfree(imx_drm_crtc);
|
||||
|
||||
return 0;
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(imx_drm_remove_crtc);
|
||||
|
||||
/*
|
||||
* imx_drm_add_encoder - add a new encoder
|
||||
*/
|
||||
int imx_drm_add_encoder(struct drm_encoder *encoder,
|
||||
struct imx_drm_encoder **newenc, struct module *owner)
|
||||
{
|
||||
struct imx_drm_device *imxdrm = __imx_drm_device();
|
||||
struct imx_drm_encoder *imx_drm_encoder;
|
||||
int ret;
|
||||
|
||||
mutex_lock(&imxdrm->mutex);
|
||||
|
||||
if (imxdrm->references) {
|
||||
ret = -EBUSY;
|
||||
goto err_busy;
|
||||
}
|
||||
|
||||
imx_drm_encoder = kzalloc(sizeof(*imx_drm_encoder), GFP_KERNEL);
|
||||
if (!imx_drm_encoder) {
|
||||
ret = -ENOMEM;
|
||||
goto err_alloc;
|
||||
}
|
||||
|
||||
imx_drm_encoder->encoder = encoder;
|
||||
imx_drm_encoder->owner = owner;
|
||||
|
||||
ret = imx_drm_encoder_register(imx_drm_encoder);
|
||||
if (ret) {
|
||||
kfree(imx_drm_encoder);
|
||||
ret = -ENOMEM;
|
||||
goto err_register;
|
||||
}
|
||||
|
||||
list_add_tail(&imx_drm_encoder->list, &imxdrm->encoder_list);
|
||||
|
||||
*newenc = imx_drm_encoder;
|
||||
|
||||
mutex_unlock(&imxdrm->mutex);
|
||||
|
||||
return 0;
|
||||
|
||||
err_register:
|
||||
kfree(imx_drm_encoder);
|
||||
err_alloc:
|
||||
err_busy:
|
||||
mutex_unlock(&imxdrm->mutex);
|
||||
|
||||
return ret;
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(imx_drm_add_encoder);
|
||||
|
||||
int imx_drm_encoder_add_possible_crtcs(
|
||||
struct imx_drm_encoder *imx_drm_encoder,
|
||||
struct device_node *np)
|
||||
{
|
||||
struct imx_drm_device *imxdrm = __imx_drm_device();
|
||||
struct of_phandle_args args;
|
||||
struct crtc_cookie *c;
|
||||
int ret = 0;
|
||||
int i;
|
||||
|
||||
if (!list_empty(&imx_drm_encoder->possible_crtcs))
|
||||
return -EBUSY;
|
||||
|
||||
for (i = 0; !ret; i++) {
|
||||
ret = of_parse_phandle_with_args(np, "crtcs",
|
||||
"#crtc-cells", i, &args);
|
||||
if (ret < 0)
|
||||
break;
|
||||
|
||||
c = kzalloc(sizeof(*c), GFP_KERNEL);
|
||||
if (!c) {
|
||||
of_node_put(args.np);
|
||||
return -ENOMEM;
|
||||
}
|
||||
|
||||
c->cookie = args.np;
|
||||
c->id = args.args_count > 0 ? args.args[0] : 0;
|
||||
|
||||
of_node_put(args.np);
|
||||
|
||||
mutex_lock(&imxdrm->mutex);
|
||||
|
||||
list_add_tail(&c->list, &imx_drm_encoder->possible_crtcs);
|
||||
|
||||
mutex_unlock(&imxdrm->mutex);
|
||||
}
|
||||
|
||||
imx_drm_update_possible_crtcs();
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
int imx_drm_encoder_get_mux_id(struct imx_drm_encoder *imx_drm_encoder,
|
||||
struct drm_crtc *crtc)
|
||||
{
|
||||
struct imx_drm_device *imxdrm = __imx_drm_device();
|
||||
struct imx_drm_crtc *imx_crtc;
|
||||
int i = 0;
|
||||
|
||||
mutex_lock(&imxdrm->mutex);
|
||||
|
||||
list_for_each_entry(imx_crtc, &imxdrm->crtc_list, list) {
|
||||
if (imx_crtc->crtc == crtc)
|
||||
goto found;
|
||||
i++;
|
||||
}
|
||||
|
||||
mutex_unlock(&imxdrm->mutex);
|
||||
|
||||
return -EINVAL;
|
||||
found:
|
||||
mutex_unlock(&imxdrm->mutex);
|
||||
|
||||
return i;
|
||||
}
|
||||
|
||||
/*
|
||||
* imx_drm_remove_encoder - remove an encoder
|
||||
*/
|
||||
int imx_drm_remove_encoder(struct imx_drm_encoder *imx_drm_encoder)
|
||||
{
|
||||
struct imx_drm_device *imxdrm = __imx_drm_device();
|
||||
struct crtc_cookie *c, *tmp;
|
||||
|
||||
mutex_lock(&imxdrm->mutex);
|
||||
|
||||
imx_drm_encoder_unregister(imx_drm_encoder);
|
||||
|
||||
list_del(&imx_drm_encoder->list);
|
||||
|
||||
list_for_each_entry_safe(c, tmp, &imx_drm_encoder->possible_crtcs,
|
||||
list)
|
||||
kfree(c);
|
||||
|
||||
mutex_unlock(&imxdrm->mutex);
|
||||
|
||||
kfree(imx_drm_encoder);
|
||||
|
||||
return 0;
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(imx_drm_remove_encoder);
|
||||
|
||||
/*
|
||||
* imx_drm_add_connector - add a connector
|
||||
*/
|
||||
int imx_drm_add_connector(struct drm_connector *connector,
|
||||
struct imx_drm_connector **new_con,
|
||||
struct module *owner)
|
||||
{
|
||||
struct imx_drm_device *imxdrm = __imx_drm_device();
|
||||
struct imx_drm_connector *imx_drm_connector;
|
||||
int ret;
|
||||
|
||||
mutex_lock(&imxdrm->mutex);
|
||||
|
||||
if (imxdrm->references) {
|
||||
ret = -EBUSY;
|
||||
goto err_busy;
|
||||
}
|
||||
|
||||
imx_drm_connector = kzalloc(sizeof(*imx_drm_connector), GFP_KERNEL);
|
||||
if (!imx_drm_connector) {
|
||||
ret = -ENOMEM;
|
||||
goto err_alloc;
|
||||
}
|
||||
|
||||
imx_drm_connector->connector = connector;
|
||||
imx_drm_connector->owner = owner;
|
||||
|
||||
ret = imx_drm_connector_register(imx_drm_connector);
|
||||
if (ret)
|
||||
goto err_register;
|
||||
|
||||
list_add_tail(&imx_drm_connector->list, &imxdrm->connector_list);
|
||||
|
||||
*new_con = imx_drm_connector;
|
||||
|
||||
mutex_unlock(&imxdrm->mutex);
|
||||
|
||||
return 0;
|
||||
|
||||
err_register:
|
||||
kfree(imx_drm_connector);
|
||||
err_alloc:
|
||||
err_busy:
|
||||
mutex_unlock(&imxdrm->mutex);
|
||||
|
||||
return ret;
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(imx_drm_add_connector);
|
||||
|
||||
void imx_drm_fb_helper_set(struct drm_fbdev_cma *fbdev_helper)
|
||||
{
|
||||
struct imx_drm_device *imxdrm = __imx_drm_device();
|
||||
|
||||
imxdrm->fbhelper = fbdev_helper;
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(imx_drm_fb_helper_set);
|
||||
|
||||
/*
|
||||
* imx_drm_remove_connector - remove a connector
|
||||
*/
|
||||
int imx_drm_remove_connector(struct imx_drm_connector *imx_drm_connector)
|
||||
{
|
||||
struct imx_drm_device *imxdrm = __imx_drm_device();
|
||||
|
||||
mutex_lock(&imxdrm->mutex);
|
||||
|
||||
imx_drm_connector_unregister(imx_drm_connector);
|
||||
|
||||
list_del(&imx_drm_connector->list);
|
||||
|
||||
mutex_unlock(&imxdrm->mutex);
|
||||
|
||||
kfree(imx_drm_connector);
|
||||
|
||||
return 0;
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(imx_drm_remove_connector);
|
||||
|
||||
static struct drm_ioctl_desc imx_drm_ioctls[] = {
|
||||
/* none so far */
|
||||
};
|
||||
|
||||
static struct drm_driver imx_drm_driver = {
|
||||
.driver_features = DRIVER_MODESET | DRIVER_GEM,
|
||||
.load = imx_drm_driver_load,
|
||||
.unload = imx_drm_driver_unload,
|
||||
.firstopen = imx_drm_driver_firstopen,
|
||||
.lastclose = imx_drm_driver_lastclose,
|
||||
.gem_free_object = drm_gem_cma_free_object,
|
||||
.gem_vm_ops = &drm_gem_cma_vm_ops,
|
||||
.dumb_create = drm_gem_cma_dumb_create,
|
||||
.dumb_map_offset = drm_gem_cma_dumb_map_offset,
|
||||
.dumb_destroy = drm_gem_cma_dumb_destroy,
|
||||
|
||||
.get_vblank_counter = drm_vblank_count,
|
||||
.enable_vblank = imx_drm_enable_vblank,
|
||||
.disable_vblank = imx_drm_disable_vblank,
|
||||
.ioctls = imx_drm_ioctls,
|
||||
.num_ioctls = ARRAY_SIZE(imx_drm_ioctls),
|
||||
.fops = &imx_drm_driver_fops,
|
||||
.name = "imx-drm",
|
||||
.desc = "i.MX DRM graphics",
|
||||
.date = "20120507",
|
||||
.major = 1,
|
||||
.minor = 0,
|
||||
.patchlevel = 0,
|
||||
};
|
||||
|
||||
static int imx_drm_platform_probe(struct platform_device *pdev)
|
||||
{
|
||||
imx_drm_device->dev = &pdev->dev;
|
||||
|
||||
return drm_platform_init(&imx_drm_driver, pdev);
|
||||
}
|
||||
|
||||
static int imx_drm_platform_remove(struct platform_device *pdev)
|
||||
{
|
||||
drm_platform_exit(&imx_drm_driver, pdev);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static struct platform_driver imx_drm_pdrv = {
|
||||
.probe = imx_drm_platform_probe,
|
||||
.remove = __devexit_p(imx_drm_platform_remove),
|
||||
.driver = {
|
||||
.owner = THIS_MODULE,
|
||||
.name = "imx-drm",
|
||||
},
|
||||
};
|
||||
|
||||
static struct platform_device *imx_drm_pdev;
|
||||
|
||||
static int __init imx_drm_init(void)
|
||||
{
|
||||
int ret;
|
||||
|
||||
imx_drm_device = kzalloc(sizeof(*imx_drm_device), GFP_KERNEL);
|
||||
if (!imx_drm_device)
|
||||
return -ENOMEM;
|
||||
|
||||
mutex_init(&imx_drm_device->mutex);
|
||||
INIT_LIST_HEAD(&imx_drm_device->crtc_list);
|
||||
INIT_LIST_HEAD(&imx_drm_device->connector_list);
|
||||
INIT_LIST_HEAD(&imx_drm_device->encoder_list);
|
||||
|
||||
imx_drm_pdev = platform_device_register_simple("imx-drm", -1, NULL, 0);
|
||||
if (!imx_drm_pdev) {
|
||||
ret = -EINVAL;
|
||||
goto err_pdev;
|
||||
}
|
||||
|
||||
imx_drm_pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32),
|
||||
|
||||
ret = platform_driver_register(&imx_drm_pdrv);
|
||||
if (ret)
|
||||
goto err_pdrv;
|
||||
|
||||
return 0;
|
||||
|
||||
err_pdrv:
|
||||
platform_device_unregister(imx_drm_pdev);
|
||||
err_pdev:
|
||||
kfree(imx_drm_device);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static void __exit imx_drm_exit(void)
|
||||
{
|
||||
platform_device_unregister(imx_drm_pdev);
|
||||
platform_driver_unregister(&imx_drm_pdrv);
|
||||
|
||||
kfree(imx_drm_device);
|
||||
}
|
||||
|
||||
module_init(imx_drm_init);
|
||||
module_exit(imx_drm_exit);
|
||||
|
||||
MODULE_AUTHOR("Sascha Hauer <s.hauer@pengutronix.de>");
|
||||
MODULE_DESCRIPTION("i.MX drm driver core");
|
||||
MODULE_LICENSE("GPL");
|
||||
|
|
@ -0,0 +1,58 @@
|
|||
#ifndef _IMX_DRM_H_
|
||||
#define _IMX_DRM_H_
|
||||
|
||||
struct imx_drm_crtc;
|
||||
struct drm_fbdev_cma;
|
||||
|
||||
struct imx_drm_crtc_helper_funcs {
|
||||
int (*enable_vblank)(struct drm_crtc *crtc);
|
||||
void (*disable_vblank)(struct drm_crtc *crtc);
|
||||
int (*set_interface_pix_fmt)(struct drm_crtc *crtc, u32 encoder_type,
|
||||
u32 pix_fmt);
|
||||
const struct drm_crtc_helper_funcs *crtc_helper_funcs;
|
||||
const struct drm_crtc_funcs *crtc_funcs;
|
||||
};
|
||||
|
||||
int imx_drm_add_crtc(struct drm_crtc *crtc,
|
||||
struct imx_drm_crtc **new_crtc,
|
||||
const struct imx_drm_crtc_helper_funcs *imx_helper_funcs,
|
||||
struct module *owner, void *cookie, int id);
|
||||
int imx_drm_remove_crtc(struct imx_drm_crtc *);
|
||||
int imx_drm_init_drm(struct platform_device *pdev,
|
||||
int preferred_bpp);
|
||||
int imx_drm_exit_drm(void);
|
||||
|
||||
int imx_drm_crtc_vblank_get(struct imx_drm_crtc *imx_drm_crtc);
|
||||
void imx_drm_crtc_vblank_put(struct imx_drm_crtc *imx_drm_crtc);
|
||||
void imx_drm_handle_vblank(struct imx_drm_crtc *imx_drm_crtc);
|
||||
|
||||
struct imx_drm_encoder;
|
||||
int imx_drm_add_encoder(struct drm_encoder *encoder,
|
||||
struct imx_drm_encoder **new_enc,
|
||||
struct module *owner);
|
||||
int imx_drm_remove_encoder(struct imx_drm_encoder *);
|
||||
|
||||
struct imx_drm_connector;
|
||||
int imx_drm_add_connector(struct drm_connector *connector,
|
||||
struct imx_drm_connector **new_con,
|
||||
struct module *owner);
|
||||
int imx_drm_remove_connector(struct imx_drm_connector *);
|
||||
|
||||
void imx_drm_mode_config_init(struct drm_device *drm);
|
||||
|
||||
struct drm_gem_cma_object *imx_drm_fb_get_obj(struct drm_framebuffer *fb);
|
||||
|
||||
struct drm_device *imx_drm_device_get(void);
|
||||
void imx_drm_device_put(void);
|
||||
int imx_drm_crtc_panel_format(struct drm_crtc *crtc, u32 encoder_type,
|
||||
u32 interface_pix_fmt);
|
||||
void imx_drm_fb_helper_set(struct drm_fbdev_cma *fbdev_helper);
|
||||
|
||||
struct device_node;
|
||||
|
||||
int imx_drm_encoder_get_mux_id(struct imx_drm_encoder *imx_drm_encoder,
|
||||
struct drm_crtc *crtc);
|
||||
int imx_drm_encoder_add_possible_crtcs(struct imx_drm_encoder *imx_drm_encoder,
|
||||
struct device_node *np);
|
||||
|
||||
#endif /* _IMX_DRM_H_ */
|
||||
|
|
@ -0,0 +1,47 @@
|
|||
/*
|
||||
* i.MX drm driver
|
||||
*
|
||||
* Copyright (C) 2012 Sascha Hauer, Pengutronix
|
||||
*
|
||||
* Based on Samsung Exynos code
|
||||
*
|
||||
* Copyright (c) 2011 Samsung Electronics Co., Ltd.
|
||||
*
|
||||
* 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.
|
||||
* This program is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU General Public License for more details.
|
||||
*
|
||||
*/
|
||||
#include <linux/module.h>
|
||||
#include <drm/drmP.h>
|
||||
#include <drm/drm_crtc.h>
|
||||
#include <drm/drm_crtc_helper.h>
|
||||
#include <drm/drm_gem_cma_helper.h>
|
||||
#include <drm/drm_fb_cma_helper.h>
|
||||
|
||||
#include "imx-drm.h"
|
||||
|
||||
static struct drm_mode_config_funcs imx_drm_mode_config_funcs = {
|
||||
.fb_create = drm_fb_cma_create,
|
||||
};
|
||||
|
||||
void imx_drm_mode_config_init(struct drm_device *dev)
|
||||
{
|
||||
dev->mode_config.min_width = 64;
|
||||
dev->mode_config.min_height = 64;
|
||||
|
||||
/*
|
||||
* set max width and height as default value(4096x4096).
|
||||
* this value would be used to check framebuffer size limitation
|
||||
* at drm_mode_addfb().
|
||||
*/
|
||||
dev->mode_config.max_width = 4096;
|
||||
dev->mode_config.max_height = 4096;
|
||||
|
||||
dev->mode_config.funcs = &imx_drm_mode_config_funcs;
|
||||
}
|
||||
|
|
@ -0,0 +1,74 @@
|
|||
/*
|
||||
* i.MX drm driver
|
||||
*
|
||||
* Copyright (C) 2012 Sascha Hauer, Pengutronix
|
||||
*
|
||||
* Based on Samsung Exynos code
|
||||
*
|
||||
* Copyright (c) 2011 Samsung Electronics Co., Ltd.
|
||||
*
|
||||
* 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.
|
||||
* This program is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU General Public License for more details.
|
||||
*
|
||||
*/
|
||||
#include <linux/module.h>
|
||||
#include <drm/drmP.h>
|
||||
#include <drm/drm_crtc.h>
|
||||
#include <drm/drm_crtc_helper.h>
|
||||
#include <drm/drm_fb_cma_helper.h>
|
||||
|
||||
#include "imx-drm.h"
|
||||
|
||||
#define MAX_CONNECTOR 4
|
||||
#define PREFERRED_BPP 16
|
||||
|
||||
static struct drm_fbdev_cma *fbdev_cma;
|
||||
|
||||
static int legacyfb_depth = 16;
|
||||
|
||||
module_param(legacyfb_depth, int, 0444);
|
||||
|
||||
static int __init imx_fb_helper_init(void)
|
||||
{
|
||||
struct drm_device *drm = imx_drm_device_get();
|
||||
|
||||
if (!drm)
|
||||
return -EINVAL;
|
||||
|
||||
if (legacyfb_depth != 16 && legacyfb_depth != 32) {
|
||||
pr_warn("i.MX legacyfb: invalid legacyfb_depth setting. defaulting to 16bpp\n");
|
||||
legacyfb_depth = 16;
|
||||
}
|
||||
|
||||
fbdev_cma = drm_fbdev_cma_init(drm, legacyfb_depth,
|
||||
drm->mode_config.num_crtc, MAX_CONNECTOR);
|
||||
|
||||
if (IS_ERR(fbdev_cma)) {
|
||||
imx_drm_device_put();
|
||||
return PTR_ERR(fbdev_cma);
|
||||
}
|
||||
|
||||
imx_drm_fb_helper_set(fbdev_cma);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void __exit imx_fb_helper_exit(void)
|
||||
{
|
||||
imx_drm_fb_helper_set(NULL);
|
||||
drm_fbdev_cma_fini(fbdev_cma);
|
||||
imx_drm_device_put();
|
||||
}
|
||||
|
||||
late_initcall(imx_fb_helper_init);
|
||||
module_exit(imx_fb_helper_exit);
|
||||
|
||||
MODULE_DESCRIPTION("Freescale i.MX legacy fb driver");
|
||||
MODULE_AUTHOR("Sascha Hauer, Pengutronix");
|
||||
MODULE_LICENSE("GPL");
|
||||
Loading…
Reference in New Issue