[PATCH v2 02/11] drm: Add support_bits parameter to drm_property_create_bitmask()

[Sagar Arun Kamble]

Reviewed-by: Sagar Kamble <sagar.a.kamble at intel.com>
Tested-by: Sagar Kamble <sagar.a.kamble at intel.com>

On Mon, 2014-02-10 at 16:05 +0200, ville.syrjala at linux.intel.com wrote:
> From: Ville Syrjälä <ville.syrjala at linux.intel.com>
> 
> Make drm_property_create_bitmask() a bit more generic by allowing the
> caller to specify which bits are in fact supported. This allows multiple
> callers to use the same enum list, but still create different versions
> of the same property with different list of supported bits.
> 
> v2: Populate values[] array as non-sparse
>     Make supported_bits 64bit
>     Fix up omapdrm call site (Rob)
> 
> Cc: Tomi Valkeinen <tomi.valkeinen at ti.com>
> Cc: Rob Clark <robdclark at gmail.com>
> Cc: Sagar Kamble <sagar.a.kamble at intel.com>
> Cc: dri-devel at lists.freedesktop.org
> Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
> ---
> This should also make my original "drm: Add drm_mode_create_rotation_property()"
> patch do the right thing. So patch 03/11 of the series needs to be replaced with the
> original.
> 
>  drivers/gpu/drm/drm_crtc.c           | 18 ++++++++++++++----
>  drivers/gpu/drm/omapdrm/omap_plane.c |  5 ++++-
>  include/drm/drm_crtc.h               |  3 ++-
>  3 files changed, 20 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c
> index 3b7d32d..6e099069 100644
> --- a/drivers/gpu/drm/drm_crtc.c
> +++ b/drivers/gpu/drm/drm_crtc.c
> @@ -2906,10 +2906,12 @@ EXPORT_SYMBOL(drm_property_create_enum);
>  struct drm_property *drm_property_create_bitmask(struct drm_device *dev,
>  					 int flags, const char *name,
>  					 const struct drm_prop_enum_list *props,
> -					 int num_values)
> +					 int num_props,
> +					 uint64_t supported_bits)
>  {
>  	struct drm_property *property;
> -	int i, ret;
> +	int i, ret, index = 0;
> +	int num_values = hweight64(supported_bits);
>  
>  	flags |= DRM_MODE_PROP_BITMASK;
>  
> @@ -2917,8 +2919,16 @@ struct drm_property *drm_property_create_bitmask(struct drm_device *dev,
>  	if (!property)
>  		return NULL;
>  
> -	for (i = 0; i < num_values; i++) {
> -		ret = drm_property_add_enum(property, i,
> +	for (i = 0; i < num_props; i++) {
> +		if (!(supported_bits & (1ULL << props[i].type)))
> +			continue;
> +
> +		if (WARN_ON(index >= num_values)) {
> +			drm_property_destroy(dev, property);
> +			return NULL;
> +		}
> +
> +		ret = drm_property_add_enum(property, index++,
>  				      props[i].type,
>  				      props[i].name);
>  		if (ret) {
> diff --git a/drivers/gpu/drm/omapdrm/omap_plane.c b/drivers/gpu/drm/omapdrm/omap_plane.c
> index 046d5e6..0d97650 100644
> --- a/drivers/gpu/drm/omapdrm/omap_plane.c
> +++ b/drivers/gpu/drm/omapdrm/omap_plane.c
> @@ -309,7 +309,10 @@ void omap_plane_install_properties(struct drm_plane *plane,
>  					{ DRM_REFLECT_Y,  "reflect-y" },
>  			};
>  			prop = drm_property_create_bitmask(dev, 0, "rotation",
> -					props, ARRAY_SIZE(props));
> +					props, ARRAY_SIZE(props),
> +					BIT(DRM_ROTATE_0) | BIT(DRM_ROTATE_90) |
> +					BIT(DRM_ROTATE_180) | BIT(DRM_ROTATE_270) |
> +					BIT(DRM_REFLECT_X) | BIT(DRM_REFLECT_Y));
>  			if (prop == NULL)
>  				return;
>  			priv->rotation_prop = prop;
> diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h
> index d5c46c1..4e6d2aa 100644
> --- a/include/drm/drm_crtc.h
> +++ b/include/drm/drm_crtc.h
> @@ -1070,7 +1070,8 @@ extern struct drm_property *drm_property_create_enum(struct drm_device *dev, int
>  struct drm_property *drm_property_create_bitmask(struct drm_device *dev,
>  					 int flags, const char *name,
>  					 const struct drm_prop_enum_list *props,
> -					 int num_values);
> +					 int num_props,
> +					 uint64_t supported_bits);
>  struct drm_property *drm_property_create_range(struct drm_device *dev, int flags,
>  					 const char *name,
>  					 uint64_t min, uint64_t max);