// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (C) 2017 NVIDIA CORPORATION. All rights reserved.
*/
#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/dma-mapping.h>
#include <linux/host1x.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_graph.h>
#include <linux/of_platform.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <linux/reset.h>
#include <drm/drm_atomic.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_blend.h>
#include <drm/drm_fourcc.h>
#include <drm/drm_framebuffer.h>
#include <drm/drm_probe_helper.h>
#include "drm.h"
#include "dc.h"
#include "plane.h"
#define NFB 24
static const u32 tegra_shared_plane_formats[] = {
DRM_FORMAT_ARGB1555,
DRM_FORMAT_RGB565,
DRM_FORMAT_RGBA5551,
DRM_FORMAT_ARGB8888,
DRM_FORMAT_ABGR8888,
/* new on Tegra114 */
DRM_FORMAT_ABGR4444,
DRM_FORMAT_ABGR1555,
DRM_FORMAT_BGRA5551,
DRM_FORMAT_XRGB1555,
DRM_FORMAT_RGBX5551,
DRM_FORMAT_XBGR1555,
DRM_FORMAT_BGRX5551,
DRM_FORMAT_BGR565,
DRM_FORMAT_XRGB8888,
DRM_FORMAT_XBGR8888,
/* planar formats */
DRM_FORMAT_UYVY,
DRM_FORMAT_YUYV,
DRM_FORMAT_YUV420,
DRM_FORMAT_YUV422,
};
static const u64 tegra_shared_plane_modifiers[] = {
DRM_FORMAT_MOD_LINEAR,
DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(0),
DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(1),
DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(2),
DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(3),
DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(4),
DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(5),
/*
* The GPU sector layout is only supported on Tegra194, but these will
* be filtered out later on by ->format_mod_supported() on SoCs where
* it isn't supported.
*/
DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(0) | DRM_FORMAT_MOD_NVIDIA_SECTOR_LAYOUT,
DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(1) | DRM_FORMAT_MOD_NVIDIA_SECTOR_LAYOUT,
DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(2) | DRM_FORMAT_MOD_NVIDIA_SECTOR_LAYOUT,
DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(3) | DRM_FORMAT_MOD_NVIDIA_SECTOR_LAYOUT,
DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(4) | DRM_FORMAT_MOD_NVIDIA_SECTOR_LAYOUT,
DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(5) | DRM_FORMAT_MOD_NVIDIA_SECTOR_LAYOUT,
/* sentinel */
DRM_FORMAT_MOD_INVALID
};
static inline unsigned int tegra_plane_offset(struct tegra_plane *plane,
unsigned int offset)
{
if (offset >= 0x500 && offset <= 0x581) {
offset = 0x000 + (offset - 0x500);
return plane->offset + offset;
}
if (offset >= 0x700 && offset <= 0x73c) {
offset = 0x180 + (offset - 0x700);
return plane->offset + offset;
}
if (offset >= 0x800 && offset <= 0x83e) {
offset = 0x1c0 + (offset - 0x800);
return plane->offset + offset;
}
dev_WARN(plane->dc->dev, "invalid offset: %x\n", offset);
return plane->offset + offset;
}
static inline u32 tegra_plane_readl(struct tegra_plane *plane,
unsigned int offset)
{
return tegra_dc_readl(plane->dc, tegra_plane_offset(plane, offset));
}
static inline void tegra_plane_writel(struct tegra_plane *plane, u32 value,
unsigned int offset)
{
tegra_dc_writel(plane->dc, value, tegra_plane_offset(plane, offset));
}
static int tegra_windowgroup_enable(struct tegra_windowgroup *wgrp)
{
int err = 0;
mutex_lock(&wgrp->lock);
if (wgrp->usecount == 0) {
err = host1x_client_resume(wgrp->parent);
if (err < 0) {
dev_err(wgrp->parent->dev, "failed to resume: %d\n", err);
goto unlock;
}
reset_control_deassert(wgrp->rst);
}
wgrp->usecount++;
unlock:
mutex_unlock(&wgrp->lock);
return err;
}
static void tegra_windowgroup_disable(struct tegra_windowgroup *wgrp)
{
int err;
mutex_lock(&wgrp->lock);
if (wgrp->usecount == 1) {
err = reset_control_assert(wgrp->rst);
if (err < 0) {
pr_err("failed to assert reset for window group %u\n",
wgrp->index);
}
host1x_client_suspend(wgrp->parent);
}
wgrp->usecount--;
mutex_unlock(&wgrp->lock);
}
int tegra_display_hub_prepare(struct tegra_display_hub *hub)
{
unsigned int i;
/*
* XXX Enabling/disabling windowgroups needs to happen when the owner
* display controller is disabled. There's currently no good point at
* which this could be executed, so unconditionally enable all window
* groups for now.
*/
for (i = 0; i < hub->soc->num_wgrps; i++) {
struct tegra_windowgroup *wgrp = &hub->wgrps[i];
/* Skip orphaned window group whose parent DC is disabled */
if (wgrp->parent)
tegra_windowgroup_enable(wgrp);
}
return 0;
}
void tegra_display_hub_cleanup(struct tegra_display_hub *hub)
{
unsigned int i;
/*
* XXX Remove this once window groups can be more fine-grainedly
* enabled and disabled.
*/
for (i = 0; i < hub->soc->num_wgrps; i++) {
struct tegra_windowgroup *wgrp = &hub->wgrps[i];
/* Skip orphaned window group whose parent DC is disabled */
if (wgrp->parent)
tegra_windowgroup_disable(wgrp);
}
}
static void tegra_shared_plane_update(struct tegra_plane *plane)
{
struct tegra_dc *dc = plane->dc;
unsigned long timeout;
u32 mask, value;
mask = COMMON_UPDATE | WIN_A_UPDATE << plane->base.index;
tegra_dc_writel(dc, mask, DC_CMD_STATE_CONTROL);
timeout = jiffies + msecs_to_jiffies(1000);
while (time_before(jiffies, timeout)) {
value = tegra_dc_readl(dc, DC_CMD_STATE_CONTROL);
if ((value & mask) == 0)
break;
usleep_range(100, 400);
}
}
static void tegra_shared_plane_activate(struct tegra_plane *plane)
{
struct tegra_dc *dc = plane->dc;
unsigned long timeout;
u32 mask, value;
mask = COMMON_ACTREQ | WIN_A_ACT_REQ << plane->base.index;
tegra_dc_writel(dc, mask, DC_CMD_STATE_CONTROL);
timeout = jiffies + msecs_to_jiffies(1000);
while (time_before(jiffies, timeout)) {
value = tegra_dc_readl(dc, DC_CMD_STATE_CONTROL);
if ((value & mask) == 0)
break;
usleep_range(100, 400);
}
}
static unsigned int
tegra_shared_plane_get_owner(struct tegra_plane *plane, struct tegra_dc *dc)
{
unsigned int offset =
tegra_plane_offset(plane, DC_WIN_CORE_WINDOWGROUP_SET_CONTROL);
return tegra_dc_readl(dc, offset) & OWNER_MASK;
}
static bool tegra_dc_owns_shared_plane(struct tegra_dc *dc,
struct tegra_plane *plane)
{
struct device *dev = dc->dev;
if (tegra_shared_plane_get_owner(plane, dc) == dc->pipe) {
if (plane->dc == dc)
return true;
dev_WARN(dev, "head %u owns window %u but is not attached\n",
dc->pipe, plane->index);
}
return false;
}
static int tegra_shared_plane_set_owner(struct tegra_plane *plane,
struct tegra_dc *new)
{
unsigned int offset =
tegra_plane_offset(plane, DC_WIN_CORE_WINDOWGROUP_SET_CONTROL);
struct tegra_dc *old = plane->dc, *dc = new ? new : old;
struct device *dev = new ? new->dev : old->dev;
unsigned int owner, index = plane->index;
u32 value;
value = tegra_dc_readl(dc, offset);
owner = value & OWNER_MASK;
if (new && (owner != OWNER_MASK && owner != new->pipe)) {
dev_WARN(dev, "window %u owned by head %u\n", index, owner);
return -EBUSY;
}
/*
* This seems to happen whenever the head has been disabled with one
* or more windows being active. This is harmless because we'll just
* reassign the window to the new head anyway.
*/
if (old && owner == OWNER_MASK)
dev_dbg(dev, "window %u not owned by head %u but %u\n", index,
old->pipe, owner);
value &= ~OWNER_MASK;
if (new)
value |= OWNER(new->pipe);
else
value |= OWNER_MASK;
tegra_dc_writel(dc, value, offset);
plane->dc = new;
return 0;
}
static void tegra_shared_plane_setup_scaler(struct tegra_plane *plane)
{
static const unsigned int coeffs[192] = {
0x00000000, 0x3c70e400, 0x3bb037e4, 0x0c51cc9c,
0x00100001, 0x3bf0dbfa, 0x3d00f406, 0x3fe003ff,
0x00300002, 0x3b80cbf5, 0x3da1040d, 0x3fb003fe,
0x00400002, 0x3b20bff1, 0x3e511015, 0x3f9003fc,
0x00500002, 0x3ad0b3ed, 0x3f21201d, 0x3f5003fb,
0x00500003, 0x3aa0a3e9, 0x3ff13026, 0x3f2007f9,
0x00500403, 0x3a7097e6, 0x00e1402f, 0x3ee007f7,
0x00500403, 0x3a608be4, 0x01d14c38, 0x3ea00bf6,
0x00500403, 0x3a507fe2, 0x02e15c42, 0x3e500ff4,
0x00500402, 0x3a6073e1, 0x03f16c4d, 0x3e000ff2,
0x00400402, 0x3a706be0, 0x05117858, 0x3db013f0,
0x00300402, 0x3a905fe0, 0x06318863, 0x3d6017ee,
0x00300402, 0x3ab057e0, 0x0771986e, 0x3d001beb,
0x00200001, 0x3af04fe1, 0x08a1a47a, 0x3cb023e9,
0x00100001, 0x3b2047e2, 0x09e1b485, 0x3c6027e7,
0x00100000, 0x3b703fe2, 0x0b11c091, 0x3c002fe6,
0x3f203800, 0x0391103f, 0x3ff0a014, 0x0811606c,
0x3f2037ff, 0x0351083c, 0x03e11842, 0x3f203c00,
0x3f302fff, 0x03010439, 0x04311c45, 0x3f104401,
0x3f302fff, 0x02c0fc35, 0x04812448, 0x3f104802,
0x3f4027ff, 0x0270f832, 0x04c1284b, 0x3f205003,
0x3f4023ff, 0x0230f030, 0x0511304e, 0x3f205403,
0x3f601fff, 0x01f0e82d, 0x05613451, 0x3f205c04,
0x3f701bfe, 0x01b0e02a, 0x05a13c54, 0x3f306006,
0x3f7017fe, 0x0170d827, 0x05f14057, 0x3f406807,
0x3f8017ff, 0x0140d424, 0x0641445a, 0x3f406c08,
0x3fa013ff, 0x0100cc22, 0x0681485d, 0x3f507409,
0x3fa00fff, 0x00d0c41f, 0x06d14c60, 0x3f607c0b,
0x3fc00fff, 0x0090bc1c, 0x07115063, 0x3f80840c,
0x3fd00bff, 0x0070b41a, 0x07515465, 0x3f908c0e,
0x3fe007ff, 0x0040b018, 0x07915868, 0x3fb0900f,
0x3ff00400, 0x0010a816, 0x07d15c6a, 0x3fd09811,
0x00a04c0e, 0x0460f442, 0x0240a827, 0x05c15859,
0x0090440d, 0x0440f040, 0x0480fc43, 0x00b05010,
0x0080400c, 0x0410ec3e, 0x04910044, 0x00d05411,
0x0070380b, 0x03f0e83d, 0x04b10846, 0x00e05812,
0x0060340a, 0x03d0e43b, 0x04d10c48, 0x00f06013,
0x00503009, 0x03b0e039, 0x04e11449, 0x01106415,
0x00402c08, 0x0390d838, 0x05011c4b, 0x01206c16,
0x00302807, 0x0370d436, 0x0511204c, 0x01407018,
0x00302406, 0x0340d034, 0x0531244e, 0x01507419,
0x00202005, 0x0320cc32, 0x05412c50, 0x01707c1b,
0x00101c04, 0x0300c431, 0x05613451, 0x0180801d,
0x00101803, 0x02e0c02f, 0x05713853, 0x01a0881e,
0x00101002, 0x02b0bc2d, 0x05814054, 0x01c08c20,
0x00000c02, 0x02a0b82c, 0x05914455, 0x01e09421,
0x00000801, 0x0280b02a, 0x05a14c57, 0x02009c23,
0x00000400, 0x0260ac28, 0x05b15458, 0x0220a025,
};
unsigned int ratio, row, column;
for (ratio = 0; ratio <= 2; ratio++) {
for (row = 0; row <= 15; row++) {
for (column = 0; column <= 3; column++) {
unsigned int index = (ratio << 6) + (row << 2) + column;
u32 value;
value = COEFF_INDEX(index) | COEFF_DATA(coeffs[index]);
tegra_plane_writel(plane, value,
DC_WIN_WINDOWGROUP_SET_INPUT_SCALER_COEFF);
}
}
}
}
static void tegra_dc_assign_shared_plane(struct tegra_dc *dc,
struct tegra_plane *plane)
{
u32 value;
int err;
if (!tegra_dc_owns_shared_plane(dc, plane)) {
err = tegra_shared_plane_set_owner(plane, dc);
if (err < 0)
return;
}
value = tegra_plane_readl(plane, DC_WIN_CORE_IHUB_LINEBUF_CONFIG);
value |= MODE_FOUR_LINES;
tegra_plane_writel(plane, value, DC_WIN_CORE_IHUB_LINEBUF_CONFIG);
value = tegra_plane_readl(plane, DC_WIN_CORE_IHUB_WGRP_FETCH_METER);
value = SLOTS(1);
tegra_plane_writel(plane, value, DC_WIN_CORE_IHUB_WGRP_FETCH_METER);
/* disable watermark */
value = tegra_plane_readl(plane, DC_WIN_CORE_IHUB_WGRP_LATENCY_CTLA);
value &= ~LATENCY_CTL_MODE_ENABLE;
tegra_plane_writel(plane, value, DC_WIN_CORE_IHUB_WGRP_LATENCY_CTLA);
value = tegra_plane_readl(plane, DC_WIN_CORE_IHUB_WGRP_LATENCY_CTLB);
value |= WATERMARK_MASK;
tegra_plane_writel(plane, value, DC_WIN_CORE_IHUB_WGRP_LATENCY_CTLB);
/* pipe meter */
value = tegra_plane_readl(plane, DC_WIN_CORE_PRECOMP_WGRP_PIPE_METER);
value = PIPE_METER_INT(0) | PIPE_METER_FRAC(0);
tegra_plane_writel(plane, value, DC_WIN_CORE_PRECOMP_WGRP_PIPE_METER);
/* mempool entries */
value = tegra_plane_readl(plane, DC_WIN_CORE_IHUB_WGRP_POOL_CONFIG);
value = MEMPOOL_ENTRIES(0x331);
tegra_plane_writel(plane, value, DC_WIN_CORE_IHUB_WGRP_POOL_CONFIG);
value = tegra_plane_readl(plane, DC_WIN_CORE_IHUB_THREAD_GROUP);
value &= ~THREAD_NUM_MASK;
value |= THREAD_NUM(plane->base.index);
value |= THREAD_GROUP_ENABLE;
tegra_plane_writel(plane, value, DC_WIN_CORE_IHUB_THREAD_GROUP);
tegra_shared_plane_setup_scaler(plane);
tegra_shared_plane_update(plane);
tegra_shared_plane_activate(plane);
}
static void tegra_dc_remove_shared_plane(struct tegra_dc *dc,
struct tegra_plane *plane)
{
tegra_shared_plane_set_owner(plane, NULL);
}
static int tegra_shared_plane_atomic_check(struct drm_plane *plane,
struct drm_atomic_state *state)
{
struct drm_plane_state *new_plane_state = drm_atomic_get_new_plane_state(state,
plane);
struct tegra_plane_state *plane_state = to_tegra_plane_state(new_plane_state);
struct tegra_shared_plane *tegra = to_tegra_shared_plane(plane);
struct tegra_bo_tiling *tiling = &plane_state->tiling;
struct tegra_dc *dc = to_tegra_dc(new_plane_state->crtc);
int err;
/* no need for further checks if the plane is being disabled */
if (!new_plane_state->crtc || !new_plane_state->fb)
return 0;
err = tegra_plane_format(new_plane_state->fb->format->format,
&plane_state->format,
&plane_state->swap);
if (err < 0)
return err;
err = tegra_fb_get_tiling(new_plane_state->fb, tiling);
if (err < 0)
return err;
if (tiling->mode == TEGRA_BO_TILING_MODE_BLOCK &&
!dc->soc->supports_block_linear) {
DRM_ERROR("hardware doesn't support block linear mode\n");
return -EINVAL;
}
if (tiling->sector_layout == TEGRA_BO_SECTOR_LAYOUT_GPU &&
!dc->soc->supports_sector_layout) {
DRM_ERROR("hardware doesn't support GPU sector layout\n");
return -EINVAL;
}
/*
* Tegra doesn't support different strides for U and V planes so we
* error out if the user tries to display a framebuffer with such a
* configuration.
*/
if (new_plane_state->fb->format->num_planes > 2) {
if (new_plane_state->fb->pitches[2] != new_plane_state->fb->pitches[1]) {
DRM_ERROR("unsupported UV-plane configuration\n");
return -EINVAL;
}
}
/* XXX scaling is not yet supported, add a check here */
err = tegra_plane_state_add(&tegra->base, new_plane_state);
if (err < 0)
return err;
return 0;
}
static void tegra_shared_plane_atomic_disable(struct drm_plane *plane,
struct drm_atomic_state *state)
{
struct drm_plane_state *old_state = drm_atomic_get_old_plane_state(state,
plane);
struct tegra_plane *p = to_tegra_plane(plane);
struct tegra_dc *dc;
u32 value;
int err;
/* rien ne va plus */
if (!old_state || !old_state->crtc)
return;
dc = to_tegra_dc(old_state->crtc);
err = host1x_client_resume(&dc->client);
if (err < 0) {
dev_err(dc->dev, "failed to resume: %d\n", err);
return;
}
/*
* XXX Legacy helpers seem to sometimes call ->atomic_disable() even
* on planes that are already disabled. Make sure we fallback to the
* head for this particular state instead of crashing.
*/
if (WARN_ON(p->dc == NULL))
p->dc = dc;
value = tegra_plane_readl(p, DC_WIN_WIN_OPTIONS);
value &= ~WIN_ENABLE;
tegra_plane_writel(p, value, DC_WIN_WIN_OPTIONS);
tegra_dc_remove_shared_plane(dc, p);
host1x_client_suspend(&dc->client);
}
static inline u32 compute_phase_incr(fixed20_12 in, unsigned int out)
{
u64 tmp, tmp1;
tmp = (u64)dfixed_trunc(in);
tmp1 = (tmp << NFB) + ((u64)out >> 1);
do_div(tmp1, out);
return lower_32_bits(tmp1);
}
static void tegra_shared_plane_atomic_update(struct drm_plane *plane,
struct drm_atomic_state *state)
{
struct drm_plane_state *new_state = drm_atomic_get_new_plane_state(state,
plane);
struct tegra_plane_state *tegra_plane_state = to_tegra_plane_state(new_state);
struct tegra_dc *dc = to_tegra_dc(new_state->crtc);
unsigned int zpos = new_state->normalized_zpos;
struct drm_framebuffer *fb = new_state->fb;
struct tegra_plane *p = to_tegra_plane(plane);
u32 value, min_width, bypass = 0;
dma_addr_t base, addr_flag = 0;
unsigned int bpc, planes;
bool yuv;
int err;
/* rien ne va plus */
if (!new_state->crtc || !new_state->fb)
return;
if (!new_state->visible) {
tegra_shared_plane_atomic_disable(plane, state);
return;
}
err = host1x_client_resume(&dc->client);
if (err < 0) {
dev_err(dc->dev, "failed to resume: %d\n", err);
return;
}
yuv = tegra_plane_format_is_yuv(tegra_plane_state->format, &planes, &bpc);
tegra_dc_assign_shared_plane(dc, p);
tegra_plane_writel(p, VCOUNTER, DC_WIN_CORE_ACT_CONTROL);
/* blending */
value = BLEND_FACTOR_DST_ALPHA_ZERO | BLEND_FACTOR_SRC_ALPHA_K2 |
BLEND_FACTOR_DST_COLOR_NEG_K1_TIMES_SRC |
BLEND_FACTOR_SRC_COLOR_K1_TIMES_SRC;
tegra_plane_writel(p, value, DC_WIN_BLEND_MATCH_SELECT);
value = BLEND_FACTOR_DST_ALPHA_ZERO | BLEND_FACTOR_SRC_ALPHA_K2 |
BLEND_FACTOR_DST_COLOR_NEG_K1_TIMES_SRC |
BLEND_FACTOR_SRC_COLOR_K1_TIMES_SRC;
tegra_plane_writel(p, value, DC_WIN_BLEND_NOMATCH_SELECT);
value = K2(255) | K1(255) | WINDOW_LAYER_DEPTH(255 - zpos);
tegra_plane_writel(p, value, DC_WIN_BLEND_LAYER_CONTROL);
/* scaling */
min_width = min(new_state->src_w >> 16, new_state->crtc_w);
value = tegra_plane_readl(p, DC_WINC_PRECOMP_WGRP_PIPE_CAPC);
if (min_width < MAX_PIXELS_5TAP444(value)) {
value = HORIZONTAL_TAPS_5 | VERTICAL_TAPS_5;
} else {
value = tegra_plane_readl(p, DC_WINC_PRECOMP_WGRP_PIPE_CAPE);
if (min_width < MAX_PIXELS_2TAP444(value))
value = HORIZONTAL_TAPS_2 | VERTICAL_TAPS_2;
else
dev_err(dc->dev, "invalid minimum width: %u\n", min_width);
}
value = HORIZONTAL_TAPS_5 | VERTICAL_TAPS_5;
tegra_plane_writel(p, value, DC_WIN_WINDOWGROUP_SET_CONTROL_INPUT_SCALER);
if (new_state->src_w != new_state->crtc_w << 16) {
fixed20_12 width = dfixed_init(new_state->src_w >> 16);
u32 incr = compute_phase_incr(width, new_state->crtc_w) & ~0x1;
u32 init = (1 << (NFB - 1)) + (incr >> 1);
tegra_plane_writel(p, incr, DC_WIN_SET_INPUT_SCALER_HPHASE_INCR);
tegra_plane_writel(p, init, DC_WIN_SET_INPUT_SCALER_H_START_PHASE);
} else {
bypass |= INPUT_SCALER_HBYPASS;
}
if (new_state->src_h != new_state->crtc_h << 16) {
fixed20_12 height = dfixed_init(new_state->src_h >> 16);
u32 incr = compute_phase_incr(height, new_state->crtc_h) & ~0x1;
u32 init = (1 << (NFB - 1)) + (incr >> 1);
tegra_plane_writel(p, incr, DC_WIN_SET_INPUT_SCALER_VPHASE_INCR);
tegra_plane_writel(p, init, DC_WIN_SET_INPUT_SCALER_V_START_PHASE);
} else {
bypass |= INPUT_SCALER_VBYPASS;
}
tegra_plane_writel(p, bypass, DC_WIN_WINDOWGROUP_SET_INPUT_SCALER_USAGE);
/* disable compression */
tegra_plane_writel(p, 0, DC_WINBUF_CDE_CONTROL);
#ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT
/*
* Physical address bit 39 in Tegra194 is used as a switch for special
* logic that swizzles the memory using either the legacy Tegra or the
* dGPU sector layout.
*/
if (tegra_plane_state->tiling.sector_layout == TEGRA_BO_SECTOR_LAYOUT_GPU)
addr_flag = BIT_ULL(39);
#endif
base = tegra_plane_state->iova[0] + fb->offsets[0];
base |= addr_flag;
tegra_plane_writel(p, tegra_plane_state->format, DC_WIN_COLOR_DEPTH);
tegra_plane_writel(p, 0, DC_WIN_PRECOMP_WGRP_PARAMS);
value = V_POSITION(new_state->crtc_y) |
H_POSITION(new_state->crtc_x);
tegra_plane_writel(p, value, DC_WIN_POSITION);
value = V_SIZE(new_state->crtc_h) | H_SIZE(new_state->crtc_w);
tegra_plane_writel(p, value, DC_WIN_SIZE);
value = WIN_ENABLE | COLOR_EXPAND;
tegra_plane_writel(p, value, DC_WIN_WIN_OPTIONS);
value = V_SIZE(new_state->src_h >> 16) | H_SIZE(new_state->src_w >> 16);
tegra_plane_writel(p, value, DC_WIN_CROPPED_SIZE);
tegra_plane_writel(p, upper_32_bits(base), DC_WINBUF_START_ADDR_HI);
tegra_plane_writel(p, lower_32_bits(base), DC_WINBUF_START_ADDR);
value = PITCH(fb->pitches[0]);
tegra_plane_writel(p, value, DC_WIN_PLANAR_STORAGE);
if (yuv && planes > 1) {
base = tegra_plane_state->iova[1] + fb->offsets[1];
base |= addr_flag;
tegra_plane_writel(p, upper_32_bits(base), DC_WINBUF_START_ADDR_HI_U);
tegra_plane_writel(p, lower_32_bits(base), DC_WINBUF_START_ADDR_U);
if (planes > 2) {
base = tegra_plane_state->iova[2] + fb->offsets[2];
base |= addr_flag;
tegra_plane_writel(p, upper_32_bits(base), DC_WINBUF_START_ADDR_HI_V);
tegra_plane_writel(p, lower_32_bits(base), DC_WINBUF_START_ADDR_V);
}
value = PITCH_U(fb->pitches[1]);
if (planes > 2)
value |= PITCH_V(fb->pitches[2]);
tegra_plane_writel(p, value, DC_WIN_PLANAR_STORAGE_UV);
} else {
tegra_plane_writel(p, 0, DC_WINBUF_START_ADDR_U);
tegra_plane_writel(p, 0, DC_WINBUF_START_ADDR_HI_U);
tegra_plane_writel(p, 0, DC_WINBUF_START_ADDR_V);
tegra_plane_writel(p, 0, DC_WINBUF_START_ADDR_HI_V);
tegra_plane_writel(p, 0, DC_WIN_PLANAR_STORAGE_UV);
}
value = CLAMP_BEFORE_BLEND | INPUT_RANGE_FULL;
if (yuv) {
if (bpc < 12)
value |= DEGAMMA_YUV8_10;
else
value |= DEGAMMA_YUV12;
/* XXX parameterize */
value |= COLOR_SPACE_YUV_2020;
} else {
if (!tegra_plane_format_is_indexed(tegra_plane_state->format))
value |= DEGAMMA_SRGB;
}
tegra_plane_writel(p, value, DC_WIN_SET_PARAMS);
value = OFFSET_X(new_state->src_y >> 16) |
OFFSET_Y(new_state->src_x >> 16);
tegra_plane_writel(p, value, DC_WINBUF_CROPPED_POINT);
if (dc->soc->supports_block_linear) {
unsigned long height = tegra_plane_state->tiling.value;
/* XXX */
switch (tegra_plane_state->tiling.mode) {
case TEGRA_BO_TILING_MODE_PITCH:
value = DC_WINBUF_SURFACE_KIND_BLOCK_HEIGHT(0) |
DC_WINBUF_SURFACE_KIND_PITCH;
break;
/* XXX not supported on Tegra186 and later */
case TEGRA_BO_TILING_MODE_TILED:
value = DC_WINBUF_SURFACE_KIND_TILED;
break;
case TEGRA_BO_TILING_MODE_BLOCK:
value = DC_WINBUF_SURFACE_KIND_BLOCK_HEIGHT(height) |
DC_WINBUF_SURFACE_KIND_BLOCK;
break;
}
tegra_plane_writel(p, value, DC_WINBUF_SURFACE_KIND);
}
/* disable gamut CSC */
value = tegra_plane_readl(p, DC_WIN_WINDOW_SET_CONTROL);
value &= ~CONTROL_CSC_ENABLE;
tegra_plane_writel(p, value, DC_WIN_WINDOW_SET_CONTROL);
host1x_client_suspend(&dc->client);
}
static const struct drm_plane_helper_funcs tegra_shared_plane_helper_funcs = {
.prepare_fb = tegra_plane_prepare_fb,
.cleanup_fb = tegra_plane_cleanup_fb,
.atomic_check = tegra_shared_plane_atomic_check,
.atomic_update = tegra_shared_plane_atomic_update,
.atomic_disable = tegra_shared_plane_atomic_disable,
};
struct drm_plane *tegra_shared_plane_create(struct drm_device *drm,
struct tegra_dc *dc,
unsigned int wgrp,
unsigned int index)
{
enum drm_plane_type type = DRM_PLANE_TYPE_OVERLAY;
struct tegra_drm *tegra = drm->dev_private;
struct tegra_display_hub *hub = tegra->hub;
struct tegra_shared_plane *plane;
unsigned int possible_crtcs;
unsigned int num_formats;
const u64 *modifiers;
struct drm_plane *p;
const u32 *formats;
int err;
plane = kzalloc(sizeof(*plane), GFP_KERNEL);
if (!plane)
return ERR_PTR(-ENOMEM);
plane->base.offset = 0x0a00 + 0x0300 * index;
plane->base.index = index;
plane->wgrp = &hub->wgrps[wgrp];
plane->wgrp->parent = &dc->client;
p = &plane->base.base;
/* planes can be assigned to arbitrary CRTCs */
possible_crtcs = BIT(tegra->num_crtcs) - 1;
num_formats = ARRAY_SIZE(tegra_shared_plane_formats);
formats = tegra_shared_plane_formats;
modifiers = tegra_shared_plane_modifiers;
err = drm_universal_plane_init(drm, p, possible_crtcs,
&tegra_plane_funcs, formats,
num_formats, modifiers, type, NULL);
if (err < 0) {
kfree(plane);
return ERR_PTR(err);
}
drm_plane_helper_add(p, &tegra_shared_plane_helper_funcs);
drm_plane_create_zpos_property(p, 0, 0, 255);
return p;
}
static struct drm_private_state *
tegra_display_hub_duplicate_state(struct drm_private_obj *obj)
{
struct tegra_display_hub_state *state;
state = kmemdup(obj->state, sizeof(*state), GFP_KERNEL);
if (!state)
return NULL;
__drm_atomic_helper_private_obj_duplicate_state(obj, &state->base);
return &state->base;
}
static void tegra_display_hub_destroy_state(struct drm_private_obj *obj,
struct drm_private_state *state)
{
struct tegra_display_hub_state *hub_state =
to_tegra_display_hub_state(state);
kfree(hub_state);
}
static const struct drm_private_state_funcs tegra_display_hub_state_funcs = {
.atomic_duplicate_state = tegra_display_hub_duplicate_state,
.atomic_destroy_state = tegra_display_hub_destroy_state,
};
static struct tegra_display_hub_state *
tegra_display_hub_get_state(struct tegra_display_hub *hub,
struct drm_atomic_state *state)
{
struct drm_private_state *priv;
priv = drm_atomic_get_private_obj_state(state, &hub->base);
if (IS_ERR(priv))
return ERR_CAST(priv);
return to_tegra_display_hub_state(priv);
}
int tegra_display_hub_atomic_check(struct drm_device *drm,
struct drm_atomic_state *state)
{
struct tegra_drm *tegra = drm->dev_private;
struct tegra_display_hub_state *hub_state;
struct drm_crtc_state *old, *new;
struct drm_crtc *crtc;
unsigned int i;
if (!tegra->hub)
return 0;
hub_state = tegra_display_hub_get_state(tegra->hub, state);
if (IS_ERR(hub_state))
return PTR_ERR(hub_state);
/*
* The display hub display clock needs to be fed by the display clock
* with the highest frequency to ensure proper functioning of all the
* displays.
*
* Note that this isn't used before Tegra186, but it doesn't hurt and
* conditionalizing it would make the code less clean.
*/
for_each_oldnew_crtc_in_state(state, crtc, old, new, i) {
struct tegra_dc_state *dc = to_dc_state(new);
if (new->active) {
if (!hub_state->clk || dc->pclk > hub_state->rate) {
hub_state->dc = to_tegra_dc(dc->base.crtc);
hub_state->clk = hub_state->dc->clk;
hub_state->rate = dc->pclk;
}
}
}
return 0;
}
static void tegra_display_hub_update(struct tegra_dc *dc)
{
u32 value;
int err;
err = host1x_client_resume(&dc->client);
if (err < 0) {
dev_err(dc->dev, "failed to resume: %d\n", err);
return;
}
value = tegra_dc_readl(dc, DC_CMD_IHUB_COMMON_MISC_CTL);
value &= ~LATENCY_EVENT;
tegra_dc_writel(dc, value, DC_CMD_IHUB_COMMON_MISC_CTL);
value = tegra_dc_readl(dc, DC_DISP_IHUB_COMMON_DISPLAY_FETCH_METER);
value = CURS_SLOTS(1) | WGRP_SLOTS(1);
tegra_dc_writel(dc, value, DC_DISP_IHUB_COMMON_DISPLAY_FETCH_METER);
tegra_dc_writel(dc, COMMON_UPDATE, DC_CMD_STATE_CONTROL);
tegra_dc_readl(dc, DC_CMD_STATE_CONTROL);
tegra_dc_writel(dc, COMMON_ACTREQ, DC_CMD_STATE_CONTROL);
tegra_dc_readl(dc, DC_CMD_STATE_CONTROL);
host1x_client_suspend(&dc->client);
}
void tegra_display_hub_atomic_commit(struct drm_device *drm,
struct drm_atomic_state *state)
{
struct tegra_drm *tegra = drm->dev_private;
struct tegra_display_hub *hub = tegra->hub;
struct tegra_display_hub_state *hub_state;
struct device *dev = hub->client.dev;
int err;
hub_state = to_tegra_display_hub_state(hub->base.state);
if (hub_state->clk) {
err = clk_set_rate(hub_state->clk, hub_state->rate);
if (err < 0)
dev_err(dev, "failed to set rate of %pC to %lu Hz\n",
hub_state->clk, hub_state->rate);
err = clk_set_parent(hub->clk_disp, hub_state->clk);
if (err < 0)
dev_err(dev, "failed to set parent of %pC to %pC: %d\n",
hub->clk_disp, hub_state->clk, err);
}
if (hub_state->dc)
tegra_display_hub_update(hub_state->dc);
}
static int tegra_display_hub_init(struct host1x_client *client)
{
struct tegra_display_hub *hub = to_tegra_display_hub(client);
struct drm_device *drm = dev_get_drvdata(client->host);
struct tegra_drm *tegra = drm->dev_private;
struct tegra_display_hub_state *state;
state = kzalloc(sizeof(*state), GFP_KERNEL);
if (!state)
return -ENOMEM;
drm_atomic_private_obj_init(drm, &hub->base, &state->base,
&tegra_display_hub_state_funcs);
tegra->hub = hub;
return 0;
}
static int tegra_display_hub_exit(struct host1x_client *client)
{
struct drm_device *drm = dev_get_drvdata(client->host);
struct tegra_drm *tegra = drm->dev_private;
drm_atomic_private_obj_fini(&tegra->hub->base);
tegra->hub = NULL;
return 0;
}
static int tegra_display_hub_runtime_suspend(struct host1x_client *client)
{
struct tegra_display_hub *hub = to_tegra_display_hub(client);
struct device *dev = client->dev;
unsigned int i = hub->num_heads;
int err;
err = reset_control_assert(hub->rst);
if (err < 0)
return err;
while (i--)
clk_disable_unprepare(hub->clk_heads[i]);
clk_disable_unprepare(hub->clk_hub);
clk_disable_unprepare(hub->clk_dsc);
clk_disable_unprepare(hub->clk_disp);
pm_runtime_put_sync(dev);
return 0;
}
static int tegra_display_hub_runtime_resume(struct host1x_client *client)
{
struct tegra_display_hub *hub = to_tegra_display_hub(client);
struct device *dev = client->dev;
unsigned int i;
int err;
err = pm_runtime_resume_and_get(dev);
if (err < 0) {
dev_err(dev, "failed to get runtime PM: %d\n", err);
return err;
}
err = clk_prepare_enable(hub->clk_disp);
if (err < 0)
goto put_rpm;
err = clk_prepare_enable(hub->clk_dsc);
if (err < 0)
goto disable_disp;
err = clk_prepare_enable(hub->clk_hub);
if (err < 0)
goto disable_dsc;
for (i = 0; i < hub->num_heads; i++) {
err = clk_prepare_enable(hub->clk_heads[i]);
if (err < 0)
goto disable_heads;
}
err = reset_control_deassert(hub->rst);
if (err < 0)
goto disable_heads;
return 0;
disable_heads:
while (i--)
clk_disable_unprepare(hub->clk_heads[i]);
clk_disable_unprepare(hub->clk_hub);
disable_dsc:
clk_disable_unprepare(hub->clk_dsc);
disable_disp:
clk_disable_unprepare(hub->clk_disp);
put_rpm:
pm_runtime_put_sync(dev);
return err;
}
static const struct host1x_client_ops tegra_display_hub_ops = {
.init = tegra_display_hub_init,
.exit = tegra_display_hub_exit,
.suspend = tegra_display_hub_runtime_suspend,
.resume = tegra_display_hub_runtime_resume,
};
static int tegra_display_hub_probe(struct platform_device *pdev)
{
u64 dma_mask = dma_get_mask(pdev->dev.parent);
struct device_node *child = NULL;
struct tegra_display_hub *hub;
struct clk *clk;
unsigned int i;
int err;
err = dma_coerce_mask_and_coherent(&pdev->dev, dma_mask);
if (err < 0) {
dev_err(&pdev->dev, "failed to set DMA mask: %d\n", err);
return err;
}
hub = devm_kzalloc(&pdev->dev, sizeof(*hub), GFP_KERNEL);
if (!hub)
return -ENOMEM;
hub->soc = of_device_get_match_data(&pdev->dev);
hub->clk_disp = devm_clk_get(&pdev->dev, "disp");
if (IS_ERR(hub->clk_disp)) {
err = PTR_ERR(hub->clk_disp);
return err;
}
if (hub->soc->supports_dsc) {
hub->clk_dsc = devm_clk_get(&pdev->dev, "dsc");
if (IS_ERR(hub->clk_dsc)) {
err = PTR_ERR(hub->clk_dsc);
return err;
}
}
hub->clk_hub = devm_clk_get(&pdev->dev, "hub");
if (IS_ERR(hub->clk_hub)) {
err = PTR_ERR(hub->clk_hub);
return err;
}
hub->rst = devm_reset_control_get(&pdev->dev, "misc");
if (IS_ERR(hub->rst)) {
err = PTR_ERR(hub->rst);
return err;
}
hub->wgrps = devm_kcalloc(&pdev->dev, hub->soc->num_wgrps,
sizeof(*hub->wgrps), GFP_KERNEL);
if (!hub->wgrps)
return -ENOMEM;
for (i = 0; i < hub->soc->num_wgrps; i++) {
struct tegra_windowgroup *wgrp = &hub->wgrps[i];
char id[16];
snprintf(id, sizeof(id), "wgrp%u", i);
mutex_init(&wgrp->lock);
wgrp->usecount = 0;
wgrp->index = i;
wgrp->rst = devm_reset_control_get(&pdev->dev, id);
if (IS_ERR(wgrp->rst))
return PTR_ERR(wgrp->rst);
err = reset_control_assert(wgrp->rst);
if (err < 0)
return err;
}
hub->num_heads = of_get_child_count(pdev->dev.of_node);
hub->clk_heads = devm_kcalloc(&pdev->dev, hub->num_heads, sizeof(clk),
GFP_KERNEL);
if (!hub->clk_heads)
return -ENOMEM;
for (i = 0; i < hub->num_heads; i++) {
child = of_get_next_child(pdev->dev.of_node, child);
if (!child) {
dev_err(&pdev->dev, "failed to find node for head %u\n",
i);
return -ENODEV;
}
clk = devm_get_clk_from_child(&pdev->dev, child, "dc");
if (IS_ERR(clk)) {
dev_err(&pdev->dev, "failed to get clock for head %u\n",
i);
of_node_put(child);
return PTR_ERR(clk);
}
hub->clk_heads[i] = clk;
}
of_node_put(child);
/* XXX: enable clock across reset? */
err = reset_control_assert(hub->rst);
if (err < 0)
return err;
platform_set_drvdata(pdev, hub);
pm_runtime_enable(&pdev->dev);
INIT_LIST_HEAD(&hub->client.list);
hub->client.ops = &tegra_display_hub_ops;
hub->client.dev = &pdev->dev;
err = host1x_client_register(&hub->client);
if (err < 0)
dev_err(&pdev->dev, "failed to register host1x client: %d\n",
err);
err = devm_of_platform_populate(&pdev->dev);
if (err < 0)
goto unregister;
return err;
unregister:
host1x_client_unregister(&hub->client);
pm_runtime_disable(&pdev->dev);
return err;
}
static void tegra_display_hub_remove(struct platform_device *pdev)
{
struct tegra_display_hub *hub = platform_get_drvdata(pdev);
unsigned int i;
host1x_client_unregister(&hub->client);
for (i = 0; i < hub->soc->num_wgrps; i++) {
struct tegra_windowgroup *wgrp = &hub->wgrps[i];
mutex_destroy(&wgrp->lock);
}
pm_runtime_disable(&pdev->dev);
}
static const struct tegra_display_hub_soc tegra186_display_hub = {
.num_wgrps = 6,
.supports_dsc = true,
};
static const struct tegra_display_hub_soc tegra194_display_hub = {
.num_wgrps = 6,
.supports_dsc = false,
};
static const struct of_device_id tegra_display_hub_of_match[] = {
{
.compatible = "nvidia,tegra194-display",
.data = &tegra194_display_hub
}, {
.compatible = "nvidia,tegra186-display",
.data = &tegra186_display_hub
}, {
/* sentinel */
}
};
MODULE_DEVICE_TABLE(of, tegra_display_hub_of_match);
struct platform_driver tegra_display_hub_driver = {
.driver = {
.name = "tegra-display-hub",
.of_match_table = tegra_display_hub_of_match,
},
.probe = tegra_display_hub_probe,
.remove_new = tegra_display_hub_remove,
};
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