Re: [PATCH v4 1/2] drm: Wrap the check for atomic_commit implementation

On Fri, Dec 23, 2016 at 02:14:00PM -0800, Dhinakaran Pandiyan wrote:

This check is useful for drivers that do not have DRIVER_ATOMIC set but have atomic modesetting internally implemented. Wrap the check into a function since this is used in many places and as a bonus, the function name helps to document what the check is for.

v2: Change return type to bool (Ville) Move the function drm_atomic.h (Daniel) Fixed comment marker for documentation

v3: Included drmP.h to dereference struct drm_device

I've went with a slightly different solution. The proper one is to extract drm_dev.h (since drmP.h is horribly messy), but that's a lot more work. -Daniel

Suggested-by: Daniel Vetter daniel.vetter@ffwll.ch Cc: Daniel Vetter daniel.vetter@ffwll.ch Cc: Ben Skeggs bskeggs@redhat.com Signed-off-by: Dhinakaran Pandiyan dhinakaran.pandiyan@intel.com

---

drivers/gpu/drm/drm_fb_helper.c | 6 +++--- drivers/gpu/drm/nouveau/nouveau_connector.c | 5 +++-- drivers/gpu/drm/nouveau/nouveau_display.c | 6 +++--- drivers/gpu/drm/nouveau/nouveau_fbcon.c | 3 ++- include/drm/drm_atomic.h | 13 +++++++++++++ 5 files changed, 24 insertions(+), 9 deletions(-)

diff --git a/drivers/gpu/drm/drm_fb_helper.c b/drivers/gpu/drm/drm_fb_helper.c index 145d55f..730342c 100644 --- a/drivers/gpu/drm/drm_fb_helper.c +++ b/drivers/gpu/drm/drm_fb_helper.c @@ -405,7 +405,7 @@ static int restore_fbdev_mode(struct drm_fb_helper *fb_helper)

drm_warn_on_modeset_not_all_locked(dev);

• if (dev->mode_config.funcs->atomic_commit)

• if (drm_drv_uses_atomic_modeset(dev)) return restore_fbdev_mode_atomic(fb_helper);

  drm_for_each_plane(plane, dev) {

@@ -1444,7 +1444,7 @@ int drm_fb_helper_pan_display(struct fb_var_screeninfo *var, return -EBUSY; }

• if (dev->mode_config.funcs->atomic_commit) {

• if (drm_drv_uses_atomic_modeset(dev)) { ret = pan_display_atomic(var, info); goto unlock; }

@@ -2060,7 +2060,7 @@ static int drm_pick_crtcs(struct drm_fb_helper *fb_helper, * NULL we fallback to the default drm_atomic_helper_best_encoder() * helper. */

• if (fb_helper->dev->mode_config.funcs->atomic_commit &&

• if (drm_drv_uses_atomic_modeset(fb_helper->dev) && !connector_funcs->best_encoder) encoder = drm_atomic_helper_best_encoder(connector); else

diff --git a/drivers/gpu/drm/nouveau/nouveau_connector.c b/drivers/gpu/drm/nouveau/nouveau_connector.c index 947c200..966d20a 100644 --- a/drivers/gpu/drm/nouveau/nouveau_connector.c +++ b/drivers/gpu/drm/nouveau/nouveau_connector.c @@ -33,6 +33,7 @@ #include <drm/drm_atomic_helper.h> #include <drm/drm_edid.h> #include <drm/drm_crtc_helper.h> +#include <drm/drm_atomic.h>

#include "nouveau_reg.h" #include "nouveau_drv.h" @@ -769,7 +770,7 @@ nouveau_connector_set_property(struct drm_connector *connector, struct drm_encoder *encoder = to_drm_encoder(nv_encoder); int ret;

• if (connector->dev->mode_config.funcs->atomic_commit)

• if (drm_drv_uses_atomic_modeset(connector->dev)) return drm_atomic_helper_connector_set_property(connector, property, value);

  ret = connector->funcs->atomic_set_property(&nv_connector->base,

@@ -1074,7 +1075,7 @@ nouveau_connector_helper_funcs = { static int nouveau_connector_dpms(struct drm_connector *connector, int mode) {

• if (connector->dev->mode_config.funcs->atomic_commit)

• if (drm_drv_uses_atomic_modeset(connector->dev)) return drm_atomic_helper_connector_dpms(connector, mode); return drm_helper_connector_dpms(connector, mode);

} diff --git a/drivers/gpu/drm/nouveau/nouveau_display.c b/drivers/gpu/drm/nouveau/nouveau_display.c index c5cf888..add353e 100644 --- a/drivers/gpu/drm/nouveau/nouveau_display.c +++ b/drivers/gpu/drm/nouveau/nouveau_display.c @@ -162,7 +162,7 @@ nouveau_display_vblstamp(struct drm_device *dev, unsigned int pipe, list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) { if (nouveau_crtc(crtc)->index == pipe) { struct drm_display_mode *mode;

• 	if (dev->mode_config.funcs->atomic_commit)
  

• 	if (drm_drv_uses_atomic_modeset(dev))
  	mode = &crtc->state->adjusted_mode;
  else
  	mode = &crtc->hwmode;
  

@@ -738,7 +738,7 @@ nouveau_display_suspend(struct drm_device *dev, bool runtime) struct nouveau_display *disp = nouveau_display(dev); struct drm_crtc *crtc;

• if (dev->mode_config.funcs->atomic_commit) {

• if (drm_drv_uses_atomic_modeset(dev)) { if (!runtime) { disp->suspend = nouveau_atomic_suspend(dev); if (IS_ERR(disp->suspend)) {

@@ -784,7 +784,7 @@ nouveau_display_resume(struct drm_device *dev, bool runtime) struct drm_crtc *crtc; int ret;

• if (dev->mode_config.funcs->atomic_commit) {

• if (drm_drv_uses_atomic_modeset(dev)) { nouveau_display_init(dev); if (disp->suspend) { drm_atomic_helper_resume(dev, disp->suspend);

diff --git a/drivers/gpu/drm/nouveau/nouveau_fbcon.c b/drivers/gpu/drm/nouveau/nouveau_fbcon.c index 5600f6c..9de6abb 100644 --- a/drivers/gpu/drm/nouveau/nouveau_fbcon.c +++ b/drivers/gpu/drm/nouveau/nouveau_fbcon.c @@ -41,6 +41,7 @@ #include <drm/drm_crtc.h> #include <drm/drm_crtc_helper.h> #include <drm/drm_fb_helper.h> +#include <drm/drm_atomic.h>

#include "nouveau_drv.h" #include "nouveau_gem.h" @@ -524,7 +525,7 @@ nouveau_fbcon_init(struct drm_device *dev) preferred_bpp = 32;

/* disable all the possible outputs/crtcs before entering KMS mode */

• if (!dev->mode_config.funcs->atomic_commit)

• if (!drm_drv_uses_atomic_modeset(dev)) drm_helper_disable_unused_functions(dev);

  ret = drm_fb_helper_initial_config(&fbcon->helper, preferred_bpp);

diff --git a/include/drm/drm_atomic.h b/include/drm/drm_atomic.h index 8cc7ca2..c894dde 100644 --- a/include/drm/drm_atomic.h +++ b/include/drm/drm_atomic.h @@ -29,6 +29,7 @@ #define DRM_ATOMIC_H_

#include <drm/drm_crtc.h> +#include <drm/drmP.h>

/**

• struct drm_crtc_commit - track modeset commits on a CRTC

@@ -419,5 +420,17 @@ drm_atomic_crtc_needs_modeset(const struct drm_crtc_state *state) state->connectors_changed; }

+/**

• • drm_drv_uses_atomic_modeset - check if the driver implements
• • atomic_commit()
• • @dev: DRM device
• • This check is useful if drivers do not have DRIVER_ATOMIC set but
• • have atomic modesetting internally implemented.
• */

+static inline bool drm_drv_uses_atomic_modeset(struct drm_device *dev) +{

• return dev->mode_config.funcs->atomic_commit != NULL;

+}

#endif /* DRM_ATOMIC_H_ */

2.7.4