Release 4.17 drivers/gpu/drm/msm/disp/mdp4/mdp4_kms.c

/*
 * 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 "msm_drv.h"
#include "msm_gem.h"
#include "msm_mmu.h"
#include "mdp4_kms.h"

static struct mdp4_platform_config *mdp4_get_config(struct platform_device *dev);



static int mdp4_hw_init(struct msm_kms *kms)
{
	struct mdp4_kms *mdp4_kms = to_mdp4_kms(to_mdp_kms(kms));
	struct drm_device *dev = mdp4_kms->dev;
	uint32_t version, major, minor, dmap_cfg, vg_cfg;
	unsigned long clk;
	int ret = 0;

	pm_runtime_get_sync(dev->dev);

	mdp4_enable(mdp4_kms);
	version = mdp4_read(mdp4_kms, REG_MDP4_VERSION);
	mdp4_disable(mdp4_kms);

	major = FIELD(version, MDP4_VERSION_MAJOR);
	minor = FIELD(version, MDP4_VERSION_MINOR);

	DBG("found MDP4 version v%d.%d", major, minor);

	if (major != 4) {
		dev_err(dev->dev, "unexpected MDP version: v%d.%d\n",
				major, minor);
		ret = -ENXIO;
		goto out;
	}

	mdp4_kms->rev = minor;

	if (mdp4_kms->rev > 1) {
		mdp4_write(mdp4_kms, REG_MDP4_CS_CONTROLLER0, 0x0707ffff);
		mdp4_write(mdp4_kms, REG_MDP4_CS_CONTROLLER1, 0x03073f3f);
	}

	mdp4_write(mdp4_kms, REG_MDP4_PORTMAP_MODE, 0x3);

	/* max read pending cmd config, 3 pending requests: */
	mdp4_write(mdp4_kms, REG_MDP4_READ_CNFG, 0x02222);

	clk = clk_get_rate(mdp4_kms->clk);

	if ((mdp4_kms->rev >= 1) || (clk >= 90000000)) {
		dmap_cfg = 0x47;     /* 16 bytes-burst x 8 req */
		vg_cfg = 0x47;       /* 16 bytes-burs x 8 req */
	} else {
		dmap_cfg = 0x27;     /* 8 bytes-burst x 8 req */
		vg_cfg = 0x43;       /* 16 bytes-burst x 4 req */
	}

	DBG("fetch config: dmap=%02x, vg=%02x", dmap_cfg, vg_cfg);

	mdp4_write(mdp4_kms, REG_MDP4_DMA_FETCH_CONFIG(DMA_P), dmap_cfg);
	mdp4_write(mdp4_kms, REG_MDP4_DMA_FETCH_CONFIG(DMA_E), dmap_cfg);

	mdp4_write(mdp4_kms, REG_MDP4_PIPE_FETCH_CONFIG(VG1), vg_cfg);
	mdp4_write(mdp4_kms, REG_MDP4_PIPE_FETCH_CONFIG(VG2), vg_cfg);
	mdp4_write(mdp4_kms, REG_MDP4_PIPE_FETCH_CONFIG(RGB1), vg_cfg);
	mdp4_write(mdp4_kms, REG_MDP4_PIPE_FETCH_CONFIG(RGB2), vg_cfg);

	if (mdp4_kms->rev >= 2)
		mdp4_write(mdp4_kms, REG_MDP4_LAYERMIXER_IN_CFG_UPDATE_METHOD, 1);
	mdp4_write(mdp4_kms, REG_MDP4_LAYERMIXER_IN_CFG, 0);

	/* disable CSC matrix / YUV by default: */
	mdp4_write(mdp4_kms, REG_MDP4_PIPE_OP_MODE(VG1), 0);
	mdp4_write(mdp4_kms, REG_MDP4_PIPE_OP_MODE(VG2), 0);
	mdp4_write(mdp4_kms, REG_MDP4_DMA_P_OP_MODE, 0);
	mdp4_write(mdp4_kms, REG_MDP4_DMA_S_OP_MODE, 0);
	mdp4_write(mdp4_kms, REG_MDP4_OVLP_CSC_CONFIG(1), 0);
	mdp4_write(mdp4_kms, REG_MDP4_OVLP_CSC_CONFIG(2), 0);

	if (mdp4_kms->rev > 1)
		mdp4_write(mdp4_kms, REG_MDP4_RESET_STATUS, 1);

	dev->mode_config.allow_fb_modifiers = true;

out:
	pm_runtime_put_sync(dev->dev);

	return ret;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Rob Clark
449
100.00%
6
100.00%
Total
449
100.00%
6
100.00%



static void mdp4_prepare_commit(struct msm_kms *kms, struct drm_atomic_state *state)
{
	struct mdp4_kms *mdp4_kms = to_mdp4_kms(to_mdp_kms(kms));
	int i;
	struct drm_crtc *crtc;
	struct drm_crtc_state *crtc_state;

	mdp4_enable(mdp4_kms);

	/* see 119ecb7fd */
	for_each_new_crtc_in_state(state, crtc, crtc_state, i)
		drm_crtc_vblank_get(crtc);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Rob Clark
43
68.25%
1
33.33%
Daniel Vetter
19
30.16%
1
33.33%
Maarten Lankhorst
1
1.59%
1
33.33%
Total
63
100.00%
3
100.00%



static void mdp4_complete_commit(struct msm_kms *kms, struct drm_atomic_state *state)
{
	struct mdp4_kms *mdp4_kms = to_mdp4_kms(to_mdp_kms(kms));
	int i;
	struct drm_crtc *crtc;
	struct drm_crtc_state *crtc_state;

	/* see 119ecb7fd */
	for_each_new_crtc_in_state(state, crtc, crtc_state, i)
		drm_crtc_vblank_put(crtc);

	mdp4_disable(mdp4_kms);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Rob Clark
47
74.60%
1
33.33%
Daniel Vetter
15
23.81%
1
33.33%
Maarten Lankhorst
1
1.59%
1
33.33%
Total
63
100.00%
3
100.00%



static void mdp4_wait_for_crtc_commit_done(struct msm_kms *kms,
						struct drm_crtc *crtc)
{
	mdp4_crtc_wait_for_commit_done(crtc);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Hai Li
21
100.00%
1
100.00%
Total
21
100.00%
1
100.00%



static long mdp4_round_pixclk(struct msm_kms *kms, unsigned long rate,
		struct drm_encoder *encoder)
{
	/* if we had >1 encoder, we'd need something more clever: */
	switch (encoder->encoder_type) {
	case DRM_MODE_ENCODER_TMDS:
		return mdp4_dtv_round_pixclk(encoder, rate);
	case DRM_MODE_ENCODER_LVDS:
	case DRM_MODE_ENCODER_DSI:
	default:
		return rate;
	}
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Rob Clark
29
58.00%
1
50.00%
Archit Taneja
21
42.00%
1
50.00%
Total
50
100.00%
2
100.00%


static const char * const iommu_ports[] = {
	"mdp_port0_cb0", "mdp_port1_cb0",
};



static void mdp4_destroy(struct msm_kms *kms)
{
	struct mdp4_kms *mdp4_kms = to_mdp4_kms(to_mdp_kms(kms));
	struct device *dev = mdp4_kms->dev->dev;
	struct msm_gem_address_space *aspace = kms->aspace;

	if (mdp4_kms->blank_cursor_iova)
		msm_gem_put_iova(mdp4_kms->blank_cursor_bo, kms->aspace);
	drm_gem_object_put_unlocked(mdp4_kms->blank_cursor_bo);

	if (aspace) {
		aspace->mmu->funcs->detach(aspace->mmu,
				iommu_ports, ARRAY_SIZE(iommu_ports));
		msm_gem_address_space_put(aspace);
	}

	if (mdp4_kms->rpm_enabled)
		pm_runtime_disable(dev);

	kfree(mdp4_kms);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Rob Clark
84
73.04%
6
60.00%
Archit Taneja
22
19.13%
1
10.00%
R Sricharan
7
6.09%
1
10.00%
Jordan Crouse
1
0.87%
1
10.00%
Steve Kowalik
1
0.87%
1
10.00%
Total
115
100.00%
10
100.00%


static const struct mdp_kms_funcs kms_funcs = {
	.base = {
		.hw_init         = mdp4_hw_init,
		.irq_preinstall  = mdp4_irq_preinstall,
		.irq_postinstall = mdp4_irq_postinstall,
		.irq_uninstall   = mdp4_irq_uninstall,
		.irq             = mdp4_irq,
		.enable_vblank   = mdp4_enable_vblank,
		.disable_vblank  = mdp4_disable_vblank,
		.prepare_commit  = mdp4_prepare_commit,
		.complete_commit = mdp4_complete_commit,
		.wait_for_crtc_commit_done = mdp4_wait_for_crtc_commit_done,
		.get_format      = mdp_get_format,
		.round_pixclk    = mdp4_round_pixclk,
		.destroy         = mdp4_destroy,
        },
	.set_irqmask         = mdp4_set_irqmask,
};



int mdp4_disable(struct mdp4_kms *mdp4_kms)
{
	DBG("");

	clk_disable_unprepare(mdp4_kms->clk);
	if (mdp4_kms->pclk)
		clk_disable_unprepare(mdp4_kms->pclk);
	clk_disable_unprepare(mdp4_kms->lut_clk);
	if (mdp4_kms->axi_clk)
		clk_disable_unprepare(mdp4_kms->axi_clk);

	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Rob Clark
58
100.00%
2
100.00%
Total
58
100.00%
2
100.00%



int mdp4_enable(struct mdp4_kms *mdp4_kms)
{
	DBG("");

	clk_prepare_enable(mdp4_kms->clk);
	if (mdp4_kms->pclk)
		clk_prepare_enable(mdp4_kms->pclk);
	clk_prepare_enable(mdp4_kms->lut_clk);
	if (mdp4_kms->axi_clk)
		clk_prepare_enable(mdp4_kms->axi_clk);

	return 0;
}


Contributors
Person
Tokens
Prop
Commits
CommitProp
Rob Clark
58
100.00%
2
100.00%
Total
58
100.00%
2
100.00%



static int mdp4_modeset_init_intf(struct mdp4_kms *mdp4_kms,
				  int intf_type)
{
	struct drm_device *dev = mdp4_kms->dev;
	struct msm_drm_private *priv = dev->dev_private;
	struct drm_encoder *encoder;
	struct drm_connector *connector;
	struct device_node *panel_node;
	int dsi_id;
	int ret;

	switch (intf_type) {
	case DRM_MODE_ENCODER_LVDS:
		/*
                 * bail out early if there is no panel node (no need to
                 * initialize LCDC encoder and LVDS connector)
                 */
		panel_node = of_graph_get_remote_node(dev->dev->of_node, 0, 0);
		if (!panel_node)
			return 0;

		encoder = mdp4_lcdc_encoder_init(dev, panel_node);
		if (IS_ERR(encoder)) {
			dev_err(dev->dev, "failed to construct LCDC encoder\n");
			return PTR_ERR(encoder);
		}

		/* LCDC can be hooked to DMA_P (TODO: Add DMA_S later?) */
		encoder->possible_crtcs = 1 << DMA_P;

		connector = mdp4_lvds_connector_init(dev, panel_node, encoder);
		if (IS_ERR(connector)) {
			dev_err(dev->dev, "failed to initialize LVDS connector\n");
			return PTR_ERR(connector);
		}

		priv->encoders[priv->num_encoders++] = encoder;
		priv->connectors[priv->num_connectors++] = connector;

		break;
	case DRM_MODE_ENCODER_TMDS:
		encoder = mdp4_dtv_encoder_init(dev);
		if (IS_ERR(encoder)) {
			dev_err(dev->dev, "failed to construct DTV encoder\n");
			return PTR_ERR(encoder);
		}

		/* DTV can be hooked to DMA_E: */
		encoder->possible_crtcs = 1 << 1;

		if (priv->hdmi) {
			/* Construct bridge/connector for HDMI: */
			ret = msm_hdmi_modeset_init(priv->hdmi, dev, encoder);
			if (ret) {
				dev_err(dev->dev, "failed to initialize HDMI: %d\n", ret);
				return ret;
			}
		}

		priv->encoders[priv->num_encoders++] = encoder;

		break;
	case DRM_MODE_ENCODER_DSI:
		/* only DSI1 supported for now */
		dsi_id = 0;

		if (!priv->dsi[dsi_id])
			break;

		encoder = mdp4_dsi_encoder_init(dev);
		if (IS_ERR(encoder)) {
			ret = PTR_ERR(encoder);
			dev_err(dev->dev,
				"failed to construct DSI encoder: %d\n", ret);
			return ret;
		}

		/* TODO: Add DMA_S later? */
		encoder->possible_crtcs = 1 << DMA_P;
		priv->encoders[priv->num_encoders++] = encoder;

		ret = msm_dsi_modeset_init(priv->dsi[dsi_id], dev, encoder);
		if (ret) {
			dev_err(dev->dev, "failed to initialize DSI: %d\n",
				ret);
			return ret;
		}

		break;
	default:
		dev_err(dev->dev, "Invalid or unsupported interface\n");
		return -EINVAL;
	}

	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Archit Taneja
246
58.99%
5
45.45%
Rob Clark
161
38.61%
4
36.36%
Rob Herring
9
2.16%
1
9.09%
Arnd Bergmann
1
0.24%
1
9.09%
Total
417
100.00%
11
100.00%



static int modeset_init(struct mdp4_kms *mdp4_kms)
{
	struct drm_device *dev = mdp4_kms->dev;
	struct msm_drm_private *priv = dev->dev_private;
	struct drm_plane *plane;
	struct drm_crtc *crtc;
	int i, ret;
	
static const enum mdp4_pipe rgb_planes[] = {
		

RGB1, RGB2,
        };
	
static const enum mdp4_pipe vg_planes[] = {
		

VG1, VG2,
        };
	
static const enum mdp4_dma mdp4_crtcs[] = {
		

DMA_P, DMA_E,
        };
	static const char * const mdp4_crtc_names[] = {
		"DMA_P", "DMA_E",
        };
	static const int mdp4_intfs[] = {
		DRM_MODE_ENCODER_LVDS,
		DRM_MODE_ENCODER_DSI,
		DRM_MODE_ENCODER_TMDS,
        };

	/* construct non-private planes: */
	for (i = 0; i < ARRAY_SIZE(vg_planes); i++) {
		plane = mdp4_plane_init(dev, vg_planes[i], false);
		if (IS_ERR(plane)) {
			dev_err(dev->dev,
				"failed to construct plane for VG%d\n", i + 1);
			ret = PTR_ERR(plane);
			goto fail;
		}
		priv->planes[priv->num_planes++] = plane;
	}

	for (i = 0; i < ARRAY_SIZE(mdp4_crtcs); i++) {
		plane = mdp4_plane_init(dev, rgb_planes[i], true);
		if (IS_ERR(plane)) {
			dev_err(dev->dev,
				"failed to construct plane for RGB%d\n", i + 1);
			ret = PTR_ERR(plane);
			goto fail;
		}

		crtc  = mdp4_crtc_init(dev, plane, priv->num_crtcs, i,
				mdp4_crtcs[i]);
		if (IS_ERR(crtc)) {
			dev_err(dev->dev, "failed to construct crtc for %s\n",
				mdp4_crtc_names[i]);
			ret = PTR_ERR(crtc);
			goto fail;
		}

		priv->crtcs[priv->num_crtcs++] = crtc;
	}

	/*
         * we currently set up two relatively fixed paths:
         *
         * LCDC/LVDS path: RGB1 -> DMA_P -> LCDC -> LVDS
         *                      or
         * DSI path: RGB1 -> DMA_P -> DSI1 -> DSI Panel
         *
         * DTV/HDMI path: RGB2 -> DMA_E -> DTV -> HDMI
         */

	for (i = 0; i < ARRAY_SIZE(mdp4_intfs); i++) {
		ret = mdp4_modeset_init_intf(mdp4_kms, mdp4_intfs[i]);
		if (ret) {
			dev_err(dev->dev, "failed to initialize intf: %d, %d\n",
				i, ret);
			goto fail;
		}
	}

	return 0;

fail:
	return ret;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Archit Taneja
210
55.56%
2
33.33%
Rob Clark
168
44.44%
4
66.67%
Total
378
100.00%
6
100.00%



struct msm_kms *mdp4_kms_init(struct drm_device *dev)
{
	struct platform_device *pdev = to_platform_device(dev->dev);
	struct mdp4_platform_config *config = mdp4_get_config(pdev);
	struct mdp4_kms *mdp4_kms;
	struct msm_kms *kms = NULL;
	struct msm_gem_address_space *aspace;
	int irq, ret;

	mdp4_kms = kzalloc(sizeof(*mdp4_kms), GFP_KERNEL);
	if (!mdp4_kms) {
		dev_err(dev->dev, "failed to allocate kms\n");
		ret = -ENOMEM;
		goto fail;
	}

	mdp_kms_init(&mdp4_kms->base, &kms_funcs);

	kms = &mdp4_kms->base.base;

	mdp4_kms->dev = dev;

	mdp4_kms->mmio = msm_ioremap(pdev, NULL, "MDP4");
	if (IS_ERR(mdp4_kms->mmio)) {
		ret = PTR_ERR(mdp4_kms->mmio);
		goto fail;
	}

	irq = platform_get_irq(pdev, 0);
	if (irq < 0) {
		ret = irq;
		dev_err(dev->dev, "failed to get irq: %d\n", ret);
		goto fail;
	}

	kms->irq = irq;

	/* NOTE: driver for this regulator still missing upstream.. use
         * _get_exclusive() and ignore the error if it does not exist
         * (and hope that the bootloader left it on for us)
         */
	mdp4_kms->vdd = devm_regulator_get_exclusive(&pdev->dev, "vdd");
	if (IS_ERR(mdp4_kms->vdd))
		mdp4_kms->vdd = NULL;

	if (mdp4_kms->vdd) {
		ret = regulator_enable(mdp4_kms->vdd);
		if (ret) {
			dev_err(dev->dev, "failed to enable regulator vdd: %d\n", ret);
			goto fail;
		}
	}

	mdp4_kms->clk = devm_clk_get(&pdev->dev, "core_clk");
	if (IS_ERR(mdp4_kms->clk)) {
		dev_err(dev->dev, "failed to get core_clk\n");
		ret = PTR_ERR(mdp4_kms->clk);
		goto fail;
	}

	mdp4_kms->pclk = devm_clk_get(&pdev->dev, "iface_clk");
	if (IS_ERR(mdp4_kms->pclk))
		mdp4_kms->pclk = NULL;

	// XXX if (rev >= MDP_REV_42) { ???
	mdp4_kms->lut_clk = devm_clk_get(&pdev->dev, "lut_clk");
	if (IS_ERR(mdp4_kms->lut_clk)) {
		dev_err(dev->dev, "failed to get lut_clk\n");
		ret = PTR_ERR(mdp4_kms->lut_clk);
		goto fail;
	}

	mdp4_kms->axi_clk = devm_clk_get(&pdev->dev, "bus_clk");
	if (IS_ERR(mdp4_kms->axi_clk)) {
		dev_err(dev->dev, "failed to get axi_clk\n");
		ret = PTR_ERR(mdp4_kms->axi_clk);
		goto fail;
	}

	clk_set_rate(mdp4_kms->clk, config->max_clk);
	clk_set_rate(mdp4_kms->lut_clk, config->max_clk);

	pm_runtime_enable(dev->dev);
	mdp4_kms->rpm_enabled = true;

	/* make sure things are off before attaching iommu (bootloader could
         * have left things on, in which case we'll start getting faults if
         * we don't disable):
         */
	mdp4_enable(mdp4_kms);
	mdp4_write(mdp4_kms, REG_MDP4_DTV_ENABLE, 0);
	mdp4_write(mdp4_kms, REG_MDP4_LCDC_ENABLE, 0);
	mdp4_write(mdp4_kms, REG_MDP4_DSI_ENABLE, 0);
	mdp4_disable(mdp4_kms);
	mdelay(16);

	if (config->iommu) {
		aspace = msm_gem_address_space_create(&pdev->dev,
				config->iommu, "mdp4");
		if (IS_ERR(aspace)) {
			ret = PTR_ERR(aspace);
			goto fail;
		}

		kms->aspace = aspace;

		ret = aspace->mmu->funcs->attach(aspace->mmu, iommu_ports,
				ARRAY_SIZE(iommu_ports));
		if (ret)
			goto fail;
	} else {
		dev_info(dev->dev, "no iommu, fallback to phys "
				"contig buffers for scanout\n");
		aspace = NULL;
	}

	ret = modeset_init(mdp4_kms);
	if (ret) {
		dev_err(dev->dev, "modeset_init failed: %d\n", ret);
		goto fail;
	}

	mdp4_kms->blank_cursor_bo = msm_gem_new(dev, SZ_16K, MSM_BO_WC);
	if (IS_ERR(mdp4_kms->blank_cursor_bo)) {
		ret = PTR_ERR(mdp4_kms->blank_cursor_bo);
		dev_err(dev->dev, "could not allocate blank-cursor bo: %d\n", ret);
		mdp4_kms->blank_cursor_bo = NULL;
		goto fail;
	}

	ret = msm_gem_get_iova(mdp4_kms->blank_cursor_bo, kms->aspace,
			&mdp4_kms->blank_cursor_iova);
	if (ret) {
		dev_err(dev->dev, "could not pin blank-cursor bo: %d\n", ret);
		goto fail;
	}

	dev->mode_config.min_width = 0;
	dev->mode_config.min_height = 0;
	dev->mode_config.max_width = 2048;
	dev->mode_config.max_height = 2048;

	return kms;

fail:
	if (kms)
		mdp4_destroy(kms);
	return ERR_PTR(ret);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Rob Clark
681
87.98%
12
70.59%
Archit Taneja
57
7.36%
3
17.65%
Hai Li
32
4.13%
1
5.88%
Laurent Pinchart
4
0.52%
1
5.88%
Total
774
100.00%
17
100.00%



static struct mdp4_platform_config *mdp4_get_config(struct platform_device *dev)
{
	static struct mdp4_platform_config config = {};

	/* TODO: Chips that aren't apq8064 have a 200 Mhz max_clk */
	config.max_clk = 266667000;
	config.iommu = iommu_domain_alloc(&platform_bus_type);
	if (config.iommu) {
		config.iommu->geometry.aperture_start = 0x1000;
		config.iommu->geometry.aperture_end = 0xffffffff;
	}

	return &config;
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Rob Clark
68
98.55%
3
75.00%
Archit Taneja
1
1.45%
1
25.00%
Total
69
100.00%
4
100.00%

Overall Contributors
Person
Tokens
Prop
Commits
CommitProp
Rob Clark
1949
73.91%
20
50.00%
Archit Taneja
557
21.12%
10
25.00%
Hai Li
58
2.20%
2
5.00%
Daniel Vetter
34
1.29%
1
2.50%
R Sricharan
21
0.80%
1
2.50%
Rob Herring
9
0.34%
1
2.50%
Laurent Pinchart
4
0.15%
1
2.50%
Maarten Lankhorst
2
0.08%
1
2.50%
Jordan Crouse
1
0.04%
1
2.50%
Steve Kowalik
1
0.04%
1
2.50%
Arnd Bergmann
1
0.04%
1
2.50%
Total
2637
100.00%
40
100.00%
Directory: drivers/gpu/drm/msm/disp/mdp4

Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.