Add atomic mode config funcs. The atomic_commit implementation is a copy-paste from drm_atomic_helper_commit(), leaving out the async test. The similar copy-paste implementation appears to be used in many other drivers too. The standard drm_atomic_helper_check() is used for checking.
Signed-off-by: Jyri Sarha jsarha@ti.com --- drivers/gpu/drm/tilcdc/tilcdc_drv.c | 47 +++++++++++++++++++++++++++++++++++++ 1 file changed, 47 insertions(+)
diff --git a/drivers/gpu/drm/tilcdc/tilcdc_drv.c b/drivers/gpu/drm/tilcdc/tilcdc_drv.c index 709bc90..66a283e 100644 --- a/drivers/gpu/drm/tilcdc/tilcdc_drv.c +++ b/drivers/gpu/drm/tilcdc/tilcdc_drv.c @@ -20,6 +20,8 @@ #include <linux/component.h> #include <linux/pinctrl/consumer.h> #include <linux/suspend.h> +#include <drm/drm_atomic.h> +#include <drm/drm_atomic_helper.h>
#include "tilcdc_drv.h" #include "tilcdc_regs.h" @@ -59,9 +61,54 @@ static void tilcdc_fb_output_poll_changed(struct drm_device *dev) drm_fbdev_cma_hotplug_event(priv->fbdev); }
+static int tilcdc_commit(struct drm_device *dev, + struct drm_atomic_state *state, + bool async) +{ + int ret; + + ret = drm_atomic_helper_prepare_planes(dev, state); + if (ret) + return ret; + + drm_atomic_helper_swap_state(dev, state); + + /* + * Everything below can be run asynchronously without the need to grab + * any modeset locks at all under one condition: It must be guaranteed + * that the asynchronous work has either been cancelled (if the driver + * supports it, which at least requires that the framebuffers get + * cleaned up with drm_atomic_helper_cleanup_planes()) or completed + * before the new state gets committed on the software side with + * drm_atomic_helper_swap_state(). + * + * This scheme allows new atomic state updates to be prepared and + * checked in parallel to the asynchronous completion of the previous + * update. Which is important since compositors need to figure out the + * composition of the next frame right after having submitted the + * current layout. + */ + + drm_atomic_helper_commit_modeset_disables(dev, state); + + drm_atomic_helper_commit_planes(dev, state, false); + + drm_atomic_helper_commit_modeset_enables(dev, state); + + drm_atomic_helper_wait_for_vblanks(dev, state); + + drm_atomic_helper_cleanup_planes(dev, state); + + drm_atomic_state_free(state); + + return 0; +} + static const struct drm_mode_config_funcs mode_config_funcs = { .fb_create = tilcdc_fb_create, .output_poll_changed = tilcdc_fb_output_poll_changed, + .atomic_check = drm_atomic_helper_check, + .atomic_commit = tilcdc_commit, };
static int modeset_init(struct drm_device *dev)