Re: [PATCH 1/7] drm/i915: Initialize Color Manager

["Jindal, Sonika" <sonika.jindal@intel.com>]

On 6/2/2015 1:22 AM, Kausal Malladi wrote:
> From: Kausal Malladi <Kausal.Malladi@intel.com>
>
> Color Manager is an extension in i915 driver to handle color correction
> and enhancements across various Intel platforms.
>
> This patch initializes color manager framework by :
> 1. Adding two new files, intel_color_manager(.c/.h)
> 2. Introducing new pointers in DRM mode_config structure to
>     carry CSC and Gamma color correction properties.
> 3. Creating these DRM properties in Color Manager initialization
>     sequence.
>
> 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 |   49 ++++++++++++++++++++++++++++
>   drivers/gpu/drm/i915/intel_color_manager.h |   32 ++++++++++++++++++
>   drivers/gpu/drm/i915/intel_display.c       |    5 +++
>   include/drm/drm_crtc.h                     |    4 +++
>   5 files changed, 93 insertions(+)
>   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 b7ddf48..c62d048 100644
> --- a/drivers/gpu/drm/i915/Makefile
> +++ b/drivers/gpu/drm/i915/Makefile
> @@ -89,6 +89,9 @@ i915-y += i915_vgpu.o
>   # legacy horrors
>   i915-y += i915_dma.o
>
> +# Color Management
> +i915-y += intel_color_manager.o
> +
>   obj-$(CONFIG_DRM_I915)  += i915.o
>
>   CFLAGS_i915_trace_points.o := -I$(src)
> 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..c83a212
> --- /dev/null
> +++ b/drivers/gpu/drm/i915/intel_color_manager.c
> @@ -0,0 +1,49 @@
> +/*
> + * 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"
> +
> +int intel_color_manager_init(struct drm_device *dev)
> +{
> +	struct drm_mode_config *config = &dev->mode_config;
> +
> +	/* Create Gamma and CSC properties */
> +	config->gamma_property = drm_property_create(dev,
> +		DRM_MODE_PROP_BLOB, "gamma_property", 0);
> +	if (!config->gamma_property)
> +		DRM_ERROR("Gamma property creation failed\n");
> +
> +	DRM_DEBUG_DRIVER("Created Gamma property\n");
> +
> +	config->csc_property = drm_property_create(dev,
> +			DRM_MODE_PROP_BLOB, "csc_property", 0);
> +	if (!config->csc_property)
> +		DRM_ERROR("CSC property creation failed\n");
> +
> +	DRM_DEBUG_DRIVER("Created CSC property\n");
> +	return 0;
> +}
> 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..3cff09d
> --- /dev/null
> +++ b/drivers/gpu/drm/i915/intel_color_manager.h
> @@ -0,0 +1,32 @@
> +/*
> + * 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>
> +
> +/* Generic Function prototypes */
> +int intel_color_manager_init(struct drm_device *dev);
> diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
> index 067b1de..93eed31 100644
> --- a/drivers/gpu/drm/i915/intel_display.c
> +++ b/drivers/gpu/drm/i915/intel_display.c
> @@ -44,6 +44,7 @@
>   #include <drm/drm_plane_helper.h>
>   #include <drm/drm_rect.h>
>   #include <linux/dma_remapping.h>
> +#include "intel_color_manager.h"
>
>   /* Primary plane formats for gen <= 3 */
>   static const uint32_t i8xx_primary_formats[] = {
> @@ -14670,6 +14671,10 @@ void intel_modeset_init(struct drm_device *dev)
>
>   	intel_init_pm(dev);
>
> +	ret = intel_color_manager_init(dev);
This call never fails, you might want to add returning of errors

Also, it is better to move this initialization after the num_pipes 
check, so that we are not initializing the color manager when modeset fails.

> +	if (ret)
> +		DRM_ERROR("Color Manager initialization failed\n");
> +
>   	if (INTEL_INFO(dev)->num_pipes == 0)
>   		return;
>
> diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h
> index 3b4d8a4..4085339 100644
> --- a/include/drm/drm_crtc.h
> +++ b/include/drm/drm_crtc.h
> @@ -1187,6 +1187,10 @@ struct drm_mode_config {
>
>   	/* cursor size */
>   	uint32_t cursor_width, cursor_height;
> +
> +	/* Color Management Properties */
> +	struct drm_property *gamma_property;
> +	struct drm_property *csc_property;
This can be moved near the property section in the same struct.
>   };
>
>   /**
>
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