blob: 76e1dfb5d25ea4e6a77012fd3f088be473237c1c [file] [log] [blame]
/*
* 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_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->dsi_pll_vdda) {
if ((mdp4_kms->rev == 2) || (mdp4_kms->rev == 4)) {
ret = regulator_set_voltage(mdp4_kms->dsi_pll_vdda,
1200000, 1200000);
if (ret) {
dev_err(dev->dev,
"failed to set dsi_pll_vdda voltage: %d\n", ret);
goto out;
}
}
}
if (mdp4_kms->dsi_pll_vddio) {
if (mdp4_kms->rev == 2) {
ret = regulator_set_voltage(mdp4_kms->dsi_pll_vddio,
1800000, 1800000);
if (ret) {
dev_err(dev->dev,
"failed to set dsi_pll_vddio voltage: %d\n", ret);
goto out;
}
}
}
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;
}
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, ncrtcs = state->dev->mode_config.num_crtc;
mdp4_enable(mdp4_kms);
/* see 119ecb7fd */
for (i = 0; i < ncrtcs; i++) {
struct drm_crtc *crtc = state->crtcs[i];
if (!crtc)
continue;
drm_crtc_vblank_get(crtc);
}
}
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, ncrtcs = state->dev->mode_config.num_crtc;
/* see 119ecb7fd */
for (i = 0; i < ncrtcs; i++) {
struct drm_crtc *crtc = state->crtcs[i];
if (!crtc)
continue;
drm_crtc_vblank_put(crtc);
}
mdp4_disable(mdp4_kms);
}
static void mdp4_wait_for_crtc_commit_done(struct msm_kms *kms,
struct drm_crtc *crtc)
{
mdp4_crtc_wait_for_commit_done(crtc);
}
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;
}
}
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 msm_mmu *mmu = mdp4_kms->mmu;
if (mmu) {
mmu->funcs->detach(mmu, iommu_ports, ARRAY_SIZE(iommu_ports));
mmu->funcs->destroy(mmu);
}
if (mdp4_kms->blank_cursor_iova)
msm_gem_put_iova(mdp4_kms->blank_cursor_bo, mdp4_kms->id);
if (mdp4_kms->blank_cursor_bo)
drm_gem_object_unreference_unlocked(mdp4_kms->blank_cursor_bo);
kfree(mdp4_kms);
}
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;
}
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;
}
static struct device_node *mdp4_detect_lcdc_panel(struct drm_device *dev)
{
struct device_node *endpoint, *panel_node;
struct device_node *np = dev->dev->of_node;
endpoint = of_graph_get_next_endpoint(np, NULL);
if (!endpoint) {
DBG("no endpoint in MDP4 to fetch LVDS panel\n");
return NULL;
}
/* don't proceed if we have an endpoint but no panel_node tied to it */
panel_node = of_graph_get_remote_port_parent(endpoint);
if (!panel_node) {
dev_err(dev->dev, "no valid panel node\n");
of_node_put(endpoint);
return ERR_PTR(-ENODEV);
}
of_node_put(endpoint);
return panel_node;
}
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;
struct drm_encoder *dsi_encs[MSM_DSI_ENCODER_NUM];
int i, 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), or
* - panel node is a bad pointer
*/
panel_node = mdp4_detect_lcdc_panel(dev);
if (IS_ERR_OR_NULL(panel_node))
return PTR_ERR(panel_node);
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;
for (i = 0; i < MSM_DSI_ENCODER_NUM; i++) {
dsi_encs[i] = mdp4_dsi_encoder_init(dev);
if (IS_ERR(dsi_encs[i])) {
ret = PTR_ERR(dsi_encs[i]);
dev_err(dev->dev,
"failed to construct DSI encoder: %d\n",
ret);
return ret;
}
/* TODO: Add DMA_S later? */
dsi_encs[i]->possible_crtcs = 1 << DMA_P;
priv->encoders[priv->num_encoders++] = dsi_encs[i];
}
ret = msm_dsi_modeset_init(priv->dsi[dsi_id], dev, dsi_encs);
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;
}
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;
}
struct msm_kms *mdp4_kms_init(struct drm_device *dev)
{
struct platform_device *pdev = dev->platformdev;
struct mdp4_platform_config *config = mdp4_get_config(pdev);
struct mdp4_kms *mdp4_kms;
struct msm_kms *kms = NULL;
struct msm_mmu *mmu;
int 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;
}
mdp4_kms->dsi_pll_vdda =
devm_regulator_get_optional(&pdev->dev, "dsi_pll_vdda");
if (IS_ERR(mdp4_kms->dsi_pll_vdda))
mdp4_kms->dsi_pll_vdda = NULL;
mdp4_kms->dsi_pll_vddio =
devm_regulator_get_optional(&pdev->dev, "dsi_pll_vddio");
if (IS_ERR(mdp4_kms->dsi_pll_vddio))
mdp4_kms->dsi_pll_vddio = NULL;
/* 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, "mdp_axi_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);
/* 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) {
mmu = msm_iommu_new(&pdev->dev, config->iommu);
if (IS_ERR(mmu)) {
ret = PTR_ERR(mmu);
goto fail;
}
ret = mmu->funcs->attach(mmu, iommu_ports,
ARRAY_SIZE(iommu_ports));
if (ret)
goto fail;
mdp4_kms->mmu = mmu;
} else {
dev_info(dev->dev, "no iommu, fallback to phys "
"contig buffers for scanout\n");
mmu = NULL;
}
mdp4_kms->id = msm_register_mmu(dev, mmu);
if (mdp4_kms->id < 0) {
ret = mdp4_kms->id;
dev_err(dev->dev, "failed to register mdp4 iommu: %d\n", ret);
goto fail;
}
ret = modeset_init(mdp4_kms);
if (ret) {
dev_err(dev->dev, "modeset_init failed: %d\n", ret);
goto fail;
}
mutex_lock(&dev->struct_mutex);
mdp4_kms->blank_cursor_bo = msm_gem_new(dev, SZ_16K, MSM_BO_WC);
mutex_unlock(&dev->struct_mutex);
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, mdp4_kms->id,
&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);
}
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);
return &config;
}