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Dhinakaran Pandiyan

2016-Dec-23 22:14 UTC

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

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

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

Dhinakaran Pandiyan

2016-Dec-23 22:14 UTC

head link

[Nouveau] [PATCH v4 2/2] drm: Get atomic property value even if DRIVER_ATOMIC is not set

i915 does not set DRIVER_ATOMIC by default yet but uses atomic_check and
atomic_commit. drm_object_property_get_value() does not read the correct
value of atomic properties if DRIVER_ATOMIC is not set. Checking whether
the driver uses atomic modeset is a better check instead as the property
values are tracked in the state structures.

v2: Included header

Cc: Daniel Vetter <daniel.vetter at ffwll.ch>
Reviewed-by: Daniel Vetter <daniel.vetter at ffwll.ch>
Signed-off-by: Dhinakaran Pandiyan <dhinakaran.pandiyan at intel.com>
---
 drivers/gpu/drm/drm_mode_object.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/drm_mode_object.c
b/drivers/gpu/drm/drm_mode_object.c
index 9f17085..14543ff 100644
--- a/drivers/gpu/drm/drm_mode_object.c
+++ b/drivers/gpu/drm/drm_mode_object.c
@@ -23,6 +23,7 @@
 #include <linux/export.h>
 #include <drm/drmP.h>
 #include <drm/drm_mode_object.h>
+#include <drm/drm_atomic.h>
 
 #include "drm_crtc_internal.h"
 
@@ -273,7 +274,7 @@ int drm_object_property_get_value(struct drm_mode_object
*obj,
 	 * their value in obj->properties->values[].. mostly to avoid
 	 * having to deal w/ EDID and similar props in atomic paths:
 	 */
-	if (drm_core_check_feature(property->dev, DRIVER_ATOMIC) &&
+	if (drm_drv_uses_atomic_modeset(property->dev) &&
 			!(property->flags & DRM_MODE_PROP_IMMUTABLE))
 		return drm_atomic_get_property(obj, property, val);
 
-- 
2.7.4

Daniel Vetter

2016-Dec-27 09:50 UTC

head link

[Nouveau] [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 at ffwll.ch>
> Cc: Daniel Vetter <daniel.vetter at ffwll.ch>
> Cc: Ben Skeggs <bskeggs at redhat.com>
> Signed-off-by: Dhinakaran Pandiyan <dhinakaran.pandiyan at 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
> 
-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch

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