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

Matt Roper
2015-07-07T23:23:43Z

On Fri, Jul 03, 2015 at 09:01:38AM +0530, Kausal Malladi wrote:
> This patch does the following:
> 1. Adds new files intel_color_manager(.c/.h)
> 2. Attaches color properties to CRTC while initialization
>
> 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) {

Is the expectation that this function will grow to include plane
properties as well? Personally I think it would be a little easier to
read/follow if we had separate functions for attaching the crtc
properties and the (eventual) plane properties, but it's not a huge
deal.

> + 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");
> + }

I agree with Damien's note that we can probably drop the messages here.
Also note that in cases like this the kernel coding style standards
indicate that even though your 'else' branches are only a single
statement, we should still use braces because braces were used on the
'if' branch.

Do we intend to expose these properties to userspace on all hardware
generations? I'd expect us to only add the properties to the crtc's
(and planes) if the hardware can actually support it.

Matt

> +}
> 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);
> +
> 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
>

--
Matt Roper
Graphics Software Engineer
IoTG Platform Enabling & Development
Intel Corporation
(916) 356-2795
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