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Commit d3f5168a authored by Eric Anholt's avatar Eric Anholt
Browse files

drm/vc4: Bind and initialize the V3D engine. 



This is the component of the GPU that does 3D rendering.

Signed-off-by: default avatarEric Anholt <eric@anholt.net>
parent 1fa81589

drivers/gpu/drm/vc4/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -11,6 +11,7 @@ vc4-y := \ 
	vc4_hdmi.o \

	vc4_hvs.o \

	vc4_plane.o \

	vc4_v3d.o \

	vc4_validate_shaders.o



vc4-$(CONFIG_DEBUG_FS) += vc4_debugfs.o

drivers/gpu/drm/vc4/vc4_debugfs.c

+2 −0
Original line number Diff line number Diff line
@@ -22,6 +22,8 @@ static const struct drm_info_list vc4_debugfs_list[] = { 
	{"crtc0_regs", vc4_crtc_debugfs_regs, 0, (void *)(uintptr_t)0},

	{"crtc1_regs", vc4_crtc_debugfs_regs, 0, (void *)(uintptr_t)1},

	{"crtc2_regs", vc4_crtc_debugfs_regs, 0, (void *)(uintptr_t)2},

	{"v3d_ident", vc4_v3d_debugfs_ident, 0},

	{"v3d_regs", vc4_v3d_debugfs_regs, 0},

};



#define VC4_DEBUGFS_ENTRIES ARRAY_SIZE(vc4_debugfs_list)

drivers/gpu/drm/vc4/vc4_drv.c

+1 −0
Original line number Diff line number Diff line
@@ -236,6 +236,7 @@ static struct platform_driver *const component_drivers[] = { 
	&vc4_hdmi_driver,

	&vc4_crtc_driver,

	&vc4_hvs_driver,

	&vc4_v3d_driver,

};



static int vc4_platform_drm_probe(struct platform_device *pdev)

drivers/gpu/drm/vc4/vc4_drv.h

+13 −0
Original line number Diff line number Diff line
@@ -15,6 +15,7 @@ struct vc4_dev { 
	struct vc4_hdmi *hdmi;

	struct vc4_hvs *hvs;

	struct vc4_crtc *crtc[3];

	struct vc4_v3d *v3d;



	struct drm_fbdev_cma *fbdev;
@@ -82,6 +83,11 @@ to_vc4_bo(struct drm_gem_object *bo) 
	return (struct vc4_bo *)bo;

}



struct vc4_v3d {

	struct platform_device *pdev;

	void __iomem *regs;

};



struct vc4_hvs {

	struct platform_device *pdev;

	void __iomem *regs;
@@ -119,6 +125,8 @@ to_vc4_encoder(struct drm_encoder *encoder) 
	return container_of(encoder, struct vc4_encoder, base);

}



#define V3D_READ(offset) readl(vc4->v3d->regs + offset)

#define V3D_WRITE(offset, val) writel(val, vc4->v3d->regs + offset)

#define HVS_READ(offset) readl(vc4->hvs->regs + offset)

#define HVS_WRITE(offset, val) writel(val, vc4->hvs->regs + offset)
@@ -241,6 +249,11 @@ struct drm_plane *vc4_plane_init(struct drm_device *dev, 
u32 vc4_plane_write_dlist(struct drm_plane *plane, u32 __iomem *dlist);

u32 vc4_plane_dlist_size(struct drm_plane_state *state);



/* vc4_v3d.c */

extern struct platform_driver vc4_v3d_driver;

int vc4_v3d_debugfs_ident(struct seq_file *m, void *unused);

int vc4_v3d_debugfs_regs(struct seq_file *m, void *unused);



/* vc4_validate_shader.c */

struct vc4_validated_shader_info *

vc4_validate_shader(struct drm_gem_cma_object *shader_obj);

drivers/gpu/drm/vc4/vc4_v3d.c

0 → 100644
+225 −0
Original line number Diff line number Diff line 
/*

 * Copyright (c) 2014 The Linux Foundation. All rights reserved.

 * Copyright (C) 2013 Red Hat

 * Author: Rob Clark <robdclark@gmail.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 "linux/component.h"

#include "vc4_drv.h"

#include "vc4_regs.h"



#ifdef CONFIG_DEBUG_FS

#define REGDEF(reg) { reg, #reg }

static const struct {

	uint32_t reg;

	const char *name;

} vc4_reg_defs[] = {

	REGDEF(V3D_IDENT0),

	REGDEF(V3D_IDENT1),

	REGDEF(V3D_IDENT2),

	REGDEF(V3D_SCRATCH),

	REGDEF(V3D_L2CACTL),

	REGDEF(V3D_SLCACTL),

	REGDEF(V3D_INTCTL),

	REGDEF(V3D_INTENA),

	REGDEF(V3D_INTDIS),

	REGDEF(V3D_CT0CS),

	REGDEF(V3D_CT1CS),

	REGDEF(V3D_CT0EA),

	REGDEF(V3D_CT1EA),

	REGDEF(V3D_CT0CA),

	REGDEF(V3D_CT1CA),

	REGDEF(V3D_CT00RA0),

	REGDEF(V3D_CT01RA0),

	REGDEF(V3D_CT0LC),

	REGDEF(V3D_CT1LC),

	REGDEF(V3D_CT0PC),

	REGDEF(V3D_CT1PC),

	REGDEF(V3D_PCS),

	REGDEF(V3D_BFC),

	REGDEF(V3D_RFC),

	REGDEF(V3D_BPCA),

	REGDEF(V3D_BPCS),

	REGDEF(V3D_BPOA),

	REGDEF(V3D_BPOS),

	REGDEF(V3D_BXCF),

	REGDEF(V3D_SQRSV0),

	REGDEF(V3D_SQRSV1),

	REGDEF(V3D_SQCNTL),

	REGDEF(V3D_SRQPC),

	REGDEF(V3D_SRQUA),

	REGDEF(V3D_SRQUL),

	REGDEF(V3D_SRQCS),

	REGDEF(V3D_VPACNTL),

	REGDEF(V3D_VPMBASE),

	REGDEF(V3D_PCTRC),

	REGDEF(V3D_PCTRE),

	REGDEF(V3D_PCTR0),

	REGDEF(V3D_PCTRS0),

	REGDEF(V3D_PCTR1),

	REGDEF(V3D_PCTRS1),

	REGDEF(V3D_PCTR2),

	REGDEF(V3D_PCTRS2),

	REGDEF(V3D_PCTR3),

	REGDEF(V3D_PCTRS3),

	REGDEF(V3D_PCTR4),

	REGDEF(V3D_PCTRS4),

	REGDEF(V3D_PCTR5),

	REGDEF(V3D_PCTRS5),

	REGDEF(V3D_PCTR6),

	REGDEF(V3D_PCTRS6),

	REGDEF(V3D_PCTR7),

	REGDEF(V3D_PCTRS7),

	REGDEF(V3D_PCTR8),

	REGDEF(V3D_PCTRS8),

	REGDEF(V3D_PCTR9),

	REGDEF(V3D_PCTRS9),

	REGDEF(V3D_PCTR10),

	REGDEF(V3D_PCTRS10),

	REGDEF(V3D_PCTR11),

	REGDEF(V3D_PCTRS11),

	REGDEF(V3D_PCTR12),

	REGDEF(V3D_PCTRS12),

	REGDEF(V3D_PCTR13),

	REGDEF(V3D_PCTRS13),

	REGDEF(V3D_PCTR14),

	REGDEF(V3D_PCTRS14),

	REGDEF(V3D_PCTR15),

	REGDEF(V3D_PCTRS15),

	REGDEF(V3D_DBGE),

	REGDEF(V3D_FDBGO),

	REGDEF(V3D_FDBGB),

	REGDEF(V3D_FDBGR),

	REGDEF(V3D_FDBGS),

	REGDEF(V3D_ERRSTAT),

};



int vc4_v3d_debugfs_regs(struct seq_file *m, void *unused)

{

	struct drm_info_node *node = (struct drm_info_node *)m->private;

	struct drm_device *dev = node->minor->dev;

	struct vc4_dev *vc4 = to_vc4_dev(dev);

	int i;



	for (i = 0; i < ARRAY_SIZE(vc4_reg_defs); i++) {

		seq_printf(m, "%s (0x%04x): 0x%08x\n",

			   vc4_reg_defs[i].name, vc4_reg_defs[i].reg,

			   V3D_READ(vc4_reg_defs[i].reg));

	}



	return 0;

}



int vc4_v3d_debugfs_ident(struct seq_file *m, void *unused)

{

	struct drm_info_node *node = (struct drm_info_node *)m->private;

	struct drm_device *dev = node->minor->dev;

	struct vc4_dev *vc4 = to_vc4_dev(dev);

	uint32_t ident1 = V3D_READ(V3D_IDENT1);

	uint32_t nslc = VC4_GET_FIELD(ident1, V3D_IDENT1_NSLC);

	uint32_t tups = VC4_GET_FIELD(ident1, V3D_IDENT1_TUPS);

	uint32_t qups = VC4_GET_FIELD(ident1, V3D_IDENT1_QUPS);



	seq_printf(m, "Revision:   %d\n",

		   VC4_GET_FIELD(ident1, V3D_IDENT1_REV));

	seq_printf(m, "Slices:     %d\n", nslc);

	seq_printf(m, "TMUs:       %d\n", nslc * tups);

	seq_printf(m, "QPUs:       %d\n", nslc * qups);

	seq_printf(m, "Semaphores: %d\n",

		   VC4_GET_FIELD(ident1, V3D_IDENT1_NSEM));



	return 0;

}

#endif /* CONFIG_DEBUG_FS */



static void vc4_v3d_init_hw(struct drm_device *dev)

{

	struct vc4_dev *vc4 = to_vc4_dev(dev);



	/* Take all the memory that would have been reserved for user

	 * QPU programs, since we don't have an interface for running

	 * them, anyway.

	 */

	V3D_WRITE(V3D_VPMBASE, 0);

}



static int vc4_v3d_bind(struct device *dev, struct device *master, void *data)

{

	struct platform_device *pdev = to_platform_device(dev);

	struct drm_device *drm = dev_get_drvdata(master);

	struct vc4_dev *vc4 = to_vc4_dev(drm);

	struct vc4_v3d *v3d = NULL;



	v3d = devm_kzalloc(&pdev->dev, sizeof(*v3d), GFP_KERNEL);

	if (!v3d)

		return -ENOMEM;



	v3d->pdev = pdev;



	v3d->regs = vc4_ioremap_regs(pdev, 0);

	if (IS_ERR(v3d->regs))

		return PTR_ERR(v3d->regs);



	vc4->v3d = v3d;



	if (V3D_READ(V3D_IDENT0) != V3D_EXPECTED_IDENT0) {

		DRM_ERROR("V3D_IDENT0 read 0x%08x instead of 0x%08x\n",

			  V3D_READ(V3D_IDENT0), V3D_EXPECTED_IDENT0);

		return -EINVAL;

	}



	vc4_v3d_init_hw(drm);



	return 0;

}



static void vc4_v3d_unbind(struct device *dev, struct device *master,

			   void *data)

{

	struct drm_device *drm = dev_get_drvdata(master);

	struct vc4_dev *vc4 = to_vc4_dev(drm);



	vc4->v3d = NULL;

}



static const struct component_ops vc4_v3d_ops = {

	.bind   = vc4_v3d_bind,

	.unbind = vc4_v3d_unbind,

};



static int vc4_v3d_dev_probe(struct platform_device *pdev)

{

	return component_add(&pdev->dev, &vc4_v3d_ops);

}



static int vc4_v3d_dev_remove(struct platform_device *pdev)

{

	component_del(&pdev->dev, &vc4_v3d_ops);

	return 0;

}



static const struct of_device_id vc4_v3d_dt_match[] = {

	{ .compatible = "brcm,vc4-v3d" },

	{}

};



struct platform_driver vc4_v3d_driver = {

	.probe = vc4_v3d_dev_probe,

	.remove = vc4_v3d_dev_remove,

	.driver = {

		.name = "vc4_v3d",

		.of_match_table = vc4_v3d_dt_match,

	},

};