Re: [PATCH 03/12] drm/i915: Attach color properties to CRTC

[Damien Lespiau <damien.lespiau@intel.com>]

On Wed, Jul 01, 2015 at 09:18:13PM +0530, Kausal Malladi wrote:
> From: Kausal Malladi <Kausal.Malladi@intel.com>
> 
> This patch does the following:
> 1. Adds new files intel_color_manager(.c/.h)
> 2. Attaches color properties to CRTC while initialization

A small note that we could remove manager from the whole API name,
intel_color_ looks enough of a prefix to me and will save some typing.

> Signed-off-by: Shashank Sharma <shashank.sharma@intel.com>
> Signed-off-by: Kausal Malladi <Kausal.Malladi@intel.com>
> ---
>  drivers/gpu/drm/i915/Makefile              |  3 +-
>  drivers/gpu/drm/i915/intel_color_manager.c | 61 ++++++++++++++++++++++++++++++
>  drivers/gpu/drm/i915/intel_color_manager.h | 28 ++++++++++++++
>  drivers/gpu/drm/i915/intel_display.c       |  3 ++
>  drivers/gpu/drm/i915/intel_drv.h           |  4 ++
>  5 files changed, 98 insertions(+), 1 deletion(-)
>  create mode 100644 drivers/gpu/drm/i915/intel_color_manager.c
>  create mode 100644 drivers/gpu/drm/i915/intel_color_manager.h
> 
> diff --git a/drivers/gpu/drm/i915/Makefile b/drivers/gpu/drm/i915/Makefile
> index de21965..ad928d8 100644
> --- a/drivers/gpu/drm/i915/Makefile
> +++ b/drivers/gpu/drm/i915/Makefile
> @@ -56,7 +56,8 @@ i915-y += intel_audio.o \
>  	  intel_overlay.o \
>  	  intel_psr.o \
>  	  intel_sideband.o \
> -	  intel_sprite.o
> +	  intel_sprite.o \
> +	  intel_color_manager.o
>  i915-$(CONFIG_ACPI)		+= intel_acpi.o intel_opregion.o
>  i915-$(CONFIG_DRM_I915_FBDEV)	+= intel_fbdev.o
>  
> diff --git a/drivers/gpu/drm/i915/intel_color_manager.c b/drivers/gpu/drm/i915/intel_color_manager.c
> new file mode 100644
> index 0000000..9280ea6
> --- /dev/null
> +++ b/drivers/gpu/drm/i915/intel_color_manager.c
> @@ -0,0 +1,61 @@
> +/*
> + * Copyright © 2015 Intel Corporation
> + *
> + * Permission is hereby granted, free of charge, to any person obtaining a
> + * copy of this software and associated documentation files (the "Software"),
> + * to deal in the Software without restriction, including without limitation
> + * the rights to use, copy, modify, merge, publish, distribute, sublicense,
> + * and/or sell copies of the Software, and to permit persons to whom the
> + * Software is furnished to do so, subject to the following conditions:
> + *
> + * The above copyright notice and this permission notice (including the next
> + * paragraph) shall be included in all copies or substantial portions of the
> + * Software.
> + *
> + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
> + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
> + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
> + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
> + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
> + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
> + * IN THE SOFTWARE.
> + *
> + * Authors:
> + * Shashank Sharma <shashank.sharma@intel.com>
> + * Kausal Malladi <Kausal.Malladi@intel.com>
> + */
> +
> +#include "intel_color_manager.h"
> +
> +void intel_color_manager_attach(struct drm_device *dev,
> +		struct drm_mode_object *mode_obj)
> +{
> +	struct drm_mode_config *config = &dev->mode_config;
> +
> +	if (mode_obj->type == DRM_MODE_OBJECT_CRTC) {
> +		if (config->prop_color_capabilities) {
> +			drm_object_attach_property(mode_obj,
> +					config->prop_color_capabilities, 0);
> +			DRM_DEBUG_DRIVER("Attached Color Caps property to CRTC\n");
> +		} else
> +			DRM_ERROR("Error attaching Color Capabilities property to CRTC\n");
> +		if (config->prop_palette_before_ctm) {
> +			drm_object_attach_property(mode_obj,
> +					config->prop_palette_before_ctm, 0);
> +			DRM_DEBUG_DRIVER("Attached Palette (before CTM) property to CRTC\n");
> +		} else
> +			DRM_ERROR("Error attaching Palette (before CTM) property to CRTC\n");
> +		if (config->prop_palette_after_ctm) {
> +			drm_object_attach_property(mode_obj,
> +					config->prop_palette_after_ctm, 0);
> +			DRM_DEBUG_DRIVER("Attached Palette (after CTM) property to CRTC\n");
> +		} else
> +			DRM_ERROR("Error attaching Palette (after CTM) property to CRTC\n");
> +		if (config->prop_ctm) {
> +			drm_object_attach_property(mode_obj,
> +					config->prop_ctm, 0);
> +			DRM_DEBUG_DRIVER("Attached CTM property to CRTC\n");
> +		} else
> +			DRM_ERROR("Error attaching CTM property to CRTC\n");
> +	}

Way too verbose, don't add any of those log message to the driver, I can
see how they may be useful for the initial effort, but it's enough to
inspect the properties actually installed on the DRM objects from
userspace.

> +}
> diff --git a/drivers/gpu/drm/i915/intel_color_manager.h b/drivers/gpu/drm/i915/intel_color_manager.h
> new file mode 100644
> index 0000000..c564761
> --- /dev/null
> +++ b/drivers/gpu/drm/i915/intel_color_manager.h
> @@ -0,0 +1,28 @@
> +/*
> + * Copyright © 2015 Intel Corporation
> + *
> + * Permission is hereby granted, free of charge, to any person obtaining a
> + * copy of this software and associated documentation files (the "Software"),
> + * to deal in the Software without restriction, including without limitation
> + * the rights to use, copy, modify, merge, publish, distribute, sublicense,
> + * and/or sell copies of the Software, and to permit persons to whom the
> + * Software is furnished to do so, subject to the following conditions:
> + *
> + * The above copyright notice and this permission notice (including the next
> + * paragraph) shall be included in all copies or substantial portions of the
> + * Software.
> + *
> + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
> + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
> + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
> + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
> + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
> + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
> + * IN THE SOFTWARE.
> + *
> + * Authors:
> + * Shashank Sharma <shashank.sharma@intel.com>
> + * Kausal Malladi <Kausal.Malladi@intel.com>
> + */
> +#include <drm/drmP.h>
> +#include <drm/drm_crtc_helper.h>
> diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
> index 724b0e3..e175df2 100644
> --- a/drivers/gpu/drm/i915/intel_display.c
> +++ b/drivers/gpu/drm/i915/intel_display.c
> @@ -14105,6 +14105,9 @@ static void intel_crtc_init(struct drm_device *dev, int pipe)
>  
>  	intel_crtc->wm.cxsr_allowed = true;
>  
> +	/* Attaching color properties to the CRTC */
> +	intel_color_manager_attach(dev, &intel_crtc->base.base);

Those kind of comments are frowned upon, don't add any more information
that the next line doesn't contain.

>  	BUG_ON(pipe >= ARRAY_SIZE(dev_priv->plane_to_crtc_mapping) ||
>  	       dev_priv->plane_to_crtc_mapping[intel_crtc->plane] != NULL);
>  	dev_priv->plane_to_crtc_mapping[intel_crtc->plane] = &intel_crtc->base;
> diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
> index 3f0a890..1e18a7e 100644
> --- a/drivers/gpu/drm/i915/intel_drv.h
> +++ b/drivers/gpu/drm/i915/intel_drv.h
> @@ -1446,4 +1446,8 @@ void intel_plane_destroy_state(struct drm_plane *plane,
>  			       struct drm_plane_state *state);
>  extern const struct drm_plane_helper_funcs intel_plane_helper_funcs;
>  
> +/* intel_color_manager.c */
> +void intel_color_manager_attach(struct drm_device *dev,
> +		struct drm_mode_object *mode_obj);
> +
>  #endif /* __INTEL_DRV_H__ */
> -- 
> 2.4.5
> 
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