forked from Minki/linux
drm/arc: Use drm_fbdev_generic_setup()
The CMA helper is already using the drm_fb_helper_generic_probe part of the generic fbdev emulation. This patch makes full use of the generic fbdev emulation by using its drm_client callbacks. This means that drm_mode_config_funcs->output_poll_changed and drm_driver->lastclose are now handled by the emulation code. Additionally fbdev unregister happens automatically on drm_dev_unregister(). The drm_fbdev_generic_setup() call is put after drm_dev_register() in the driver. This is done to highlight the fact that fbdev emulation is an internal client that makes use of the driver, it is not part of the driver as such. If fbdev setup fails, an error is printed, but the driver succeeds probing. Cc: Alexey Brodkin <abrodkin@synopsys.com> Signed-off-by: Noralf Trønnes <noralf@tronnes.org> Acked-by: Sam Ravnborg <sam@ravnborg.org> Acked-by: Alexey Brodkin <abrodkin@synopsys.com> Link: https://patchwork.freedesktop.org/patch/msgid/20181025201340.34227-2-noralf@tronnes.org
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@ -20,7 +20,6 @@
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struct arcpgu_drm_private {
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void __iomem *regs;
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struct clk *clk;
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struct drm_fbdev_cma *fbdev;
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struct drm_framebuffer *fb;
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struct drm_crtc crtc;
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struct drm_plane *plane;
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@ -43,8 +42,5 @@ static inline u32 arc_pgu_read(struct arcpgu_drm_private *arcpgu,
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int arc_pgu_setup_crtc(struct drm_device *dev);
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int arcpgu_drm_hdmi_init(struct drm_device *drm, struct device_node *np);
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int arcpgu_drm_sim_init(struct drm_device *drm, struct device_node *np);
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struct drm_fbdev_cma *arcpgu_fbdev_cma_init(struct drm_device *dev,
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unsigned int preferred_bpp, unsigned int num_crtc,
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unsigned int max_conn_count);
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#endif
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@ -17,6 +17,7 @@
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#include <linux/clk.h>
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#include <drm/drm_crtc_helper.h>
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#include <drm/drm_fb_cma_helper.h>
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#include <drm/drm_fb_helper.h>
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#include <drm/drm_gem_cma_helper.h>
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#include <drm/drm_gem_framebuffer_helper.h>
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#include <drm/drm_atomic_helper.h>
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@ -25,16 +26,8 @@
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#include "arcpgu.h"
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#include "arcpgu_regs.h"
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static void arcpgu_fb_output_poll_changed(struct drm_device *dev)
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{
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struct arcpgu_drm_private *arcpgu = dev->dev_private;
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drm_fbdev_cma_hotplug_event(arcpgu->fbdev);
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}
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static const struct drm_mode_config_funcs arcpgu_drm_modecfg_funcs = {
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.fb_create = drm_gem_fb_create,
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.output_poll_changed = arcpgu_fb_output_poll_changed,
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.atomic_check = drm_atomic_helper_check,
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.atomic_commit = drm_atomic_helper_commit,
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};
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@ -51,13 +44,6 @@ static void arcpgu_setup_mode_config(struct drm_device *drm)
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DEFINE_DRM_GEM_CMA_FOPS(arcpgu_drm_ops);
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static void arcpgu_lastclose(struct drm_device *drm)
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{
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struct arcpgu_drm_private *arcpgu = drm->dev_private;
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drm_fbdev_cma_restore_mode(arcpgu->fbdev);
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}
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static int arcpgu_load(struct drm_device *drm)
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{
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struct platform_device *pdev = to_platform_device(drm->dev);
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@ -113,26 +99,12 @@ static int arcpgu_load(struct drm_device *drm)
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drm_mode_config_reset(drm);
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drm_kms_helper_poll_init(drm);
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arcpgu->fbdev = drm_fbdev_cma_init(drm, 16,
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drm->mode_config.num_connector);
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if (IS_ERR(arcpgu->fbdev)) {
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ret = PTR_ERR(arcpgu->fbdev);
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arcpgu->fbdev = NULL;
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return -ENODEV;
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}
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platform_set_drvdata(pdev, drm);
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return 0;
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}
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static int arcpgu_unload(struct drm_device *drm)
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{
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struct arcpgu_drm_private *arcpgu = drm->dev_private;
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if (arcpgu->fbdev) {
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drm_fbdev_cma_fini(arcpgu->fbdev);
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arcpgu->fbdev = NULL;
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}
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drm_kms_helper_poll_fini(drm);
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drm_atomic_helper_shutdown(drm);
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drm_mode_config_cleanup(drm);
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@ -168,7 +140,6 @@ static int arcpgu_debugfs_init(struct drm_minor *minor)
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static struct drm_driver arcpgu_drm_driver = {
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.driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME |
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DRIVER_ATOMIC,
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.lastclose = arcpgu_lastclose,
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.name = "arcpgu",
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.desc = "ARC PGU Controller",
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.date = "20160219",
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@ -211,6 +182,8 @@ static int arcpgu_probe(struct platform_device *pdev)
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if (ret)
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goto err_unload;
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drm_fbdev_generic_setup(drm, 16);
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return 0;
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err_unload:
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