drm/tilcdc: Add dummy primary plane implementation (b961c48b) · Commits · 戴 / test

drivers/gpu/drm/tilcdc/Makefile

+1 −0

Original line number	Diff line number	Diff line
		@@ -7,6 +7,7 @@ obj-$(CONFIG_DRM_TILCDC_SLAVE_COMPAT) += tilcdc_slave_compat.o \
		tilcdc_slave_compat.dtb.o

		tilcdc-y := \
		tilcdc_plane.o \
		tilcdc_crtc.o \
		tilcdc_tfp410.o \
		tilcdc_panel.o \

drivers/gpu/drm/tilcdc/tilcdc_drv.h

+2 −0

Original line number	Diff line number	Diff line
		@@ -179,4 +179,6 @@ int tilcdc_crtc_page_flip(struct drm_crtc *crtc,
		struct drm_pending_vblank_event *event,
		uint32_t page_flip_flags);

		int tilcdc_plane_init(struct drm_device dev, struct drm_plane plane);

		#endif /* __TILCDC_DRV_H__ */

drivers/gpu/drm/tilcdc/tilcdc_plane.c

0 → 100644

+133 −0

Original line number	Diff line number	Diff line
		/*
		* Copyright (C) 2015 Texas Instruments
		* Author: Jyri Sarha <jsarha@ti.com>
		*
		* This program is free software; you can redistribute it and/or modify it
		* under the terms of the GNU General Public License version 2 as published by
		* the Free Software Foundation.
		*
		* This program is distributed in the hope that it will be useful, but WITHOUT
		* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
		* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
		* more details.
		*
		* You should have received a copy of the GNU General Public License along with
		* this program. If not, see <http://www.gnu.org/licenses/>.
		*/

		#include <drm/drmP.h>

		#include <drm/drm_atomic.h>
		#include <drm/drm_plane_helper.h>
		#include <drm/drm_atomic_helper.h>
		#include <uapi/drm/drm_fourcc.h>

		#include "tilcdc_drv.h"

		static const u32 tilcdc_formats[] = { DRM_FORMAT_RGB565,
		DRM_FORMAT_RGB888,
		DRM_FORMAT_XRGB8888 };

		static struct drm_plane_funcs tilcdc_plane_funcs = {
		.update_plane = drm_atomic_helper_update_plane,
		.disable_plane = drm_atomic_helper_disable_plane,
		.destroy = drm_plane_cleanup,
		.set_property = drm_atomic_helper_plane_set_property,
		.reset = drm_atomic_helper_plane_reset,
		.atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state,
		.atomic_destroy_state = drm_atomic_helper_plane_destroy_state,
		};

		static int tilcdc_plane_atomic_check(struct drm_plane *plane,
		struct drm_plane_state *state)
		{
		struct drm_crtc_state *crtc_state;
		struct drm_plane_state *old_state = plane->state;
		unsigned int depth, bpp;

		if (!state->crtc)
		return 0;

		if (WARN_ON(!state->fb))
		return -EINVAL;

		if (state->crtc_x \|\| state->crtc_y) {
		dev_err(plane->dev->dev, "%s: crtc position must be zero.",
		__func__);
		return -EINVAL;
		}

		crtc_state = drm_atomic_get_existing_crtc_state(state->state,
		state->crtc);
		/* we should have a crtc state if the plane is attached to a crtc */
		if (WARN_ON(!crtc_state))
		return 0;

		if (crtc_state->mode.hdisplay != state->crtc_w \|\|
		crtc_state->mode.vdisplay != state->crtc_h) {
		dev_err(plane->dev->dev,
		"%s: Size must match mode (%dx%d == %dx%d)", __func__,
		crtc_state->mode.hdisplay, crtc_state->mode.vdisplay,
		state->crtc_w, state->crtc_h);
		return -EINVAL;
		}

		drm_fb_get_bpp_depth(state->fb->pixel_format, &depth, &bpp);
		if (state->fb->pitches[0] != crtc_state->mode.hdisplay * bpp / 8) {
		dev_err(plane->dev->dev,
		"Invalid pitch: fb and crtc widths must be the same");
		return -EINVAL;
		}

		if (state->fb && old_state->fb &&
		state->fb->pixel_format != old_state->fb->pixel_format) {
		dev_dbg(plane->dev->dev,
		"%s(): pixel format change requires mode_change\n",
		__func__);
		crtc_state->mode_changed = true;
		}

		return 0;
		}

		static void tilcdc_plane_atomic_update(struct drm_plane *plane,
		struct drm_plane_state *old_state)
		{
		struct drm_plane_state *state = plane->state;

		if (!state->crtc)
		return;

		if (WARN_ON(!state->fb \|\| !state->crtc->state))
		return;

		tilcdc_crtc_page_flip(state->crtc,
		state->fb,
		state->crtc->state->event,
		0);
		}

		static const struct drm_plane_helper_funcs plane_helper_funcs = {
		.atomic_check = tilcdc_plane_atomic_check,
		.atomic_update = tilcdc_plane_atomic_update,
		};

		int tilcdc_plane_init(struct drm_device *dev,
		struct drm_plane *plane)
		{
		int ret;

		ret = drm_plane_init(dev, plane, 1,
		&tilcdc_plane_funcs,
		tilcdc_formats,
		ARRAY_SIZE(tilcdc_formats),
		true);
		if (ret) {
		dev_err(dev->dev, "Failed to initialize plane: %d\n", ret);
		return ret;
		}

		drm_plane_helper_add(plane, &plane_helper_funcs);

		return 0;
		}

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