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alistair23-linux/drivers/gpu/drm/vc4/vc4_plane.c

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/*
* Copyright (C) 2015 Broadcom
*
* 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.
*/
/**
* DOC: VC4 plane module
*
* Each DRM plane is a layer of pixels being scanned out by the HVS.
*
* At atomic modeset check time, we compute the HVS display element
* state that would be necessary for displaying the plane (giving us a
* chance to figure out if a plane configuration is invalid), then at
* atomic flush time the CRTC will ask us to write our element state
* into the region of the HVS that it has allocated for us.
*/
#include <drm/drm_atomic.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_fb_cma_helper.h>
#include <drm/drm_plane_helper.h>
#include "uapi/drm/vc4_drm.h"
#include "vc4_drv.h"
#include "vc4_regs.h"
static const struct hvs_format {
u32 drm; /* DRM_FORMAT_* */
u32 hvs; /* HVS_FORMAT_* */
u32 pixel_order;
} hvs_formats[] = {
{
.drm = DRM_FORMAT_XRGB8888, .hvs = HVS_PIXEL_FORMAT_RGBA8888,
.pixel_order = HVS_PIXEL_ORDER_ABGR,
},
{
.drm = DRM_FORMAT_ARGB8888, .hvs = HVS_PIXEL_FORMAT_RGBA8888,
.pixel_order = HVS_PIXEL_ORDER_ABGR,
},
{
.drm = DRM_FORMAT_ABGR8888, .hvs = HVS_PIXEL_FORMAT_RGBA8888,
.pixel_order = HVS_PIXEL_ORDER_ARGB,
},
{
.drm = DRM_FORMAT_XBGR8888, .hvs = HVS_PIXEL_FORMAT_RGBA8888,
.pixel_order = HVS_PIXEL_ORDER_ARGB,
},
{
.drm = DRM_FORMAT_RGB565, .hvs = HVS_PIXEL_FORMAT_RGB565,
.pixel_order = HVS_PIXEL_ORDER_XRGB,
},
{
.drm = DRM_FORMAT_BGR565, .hvs = HVS_PIXEL_FORMAT_RGB565,
.pixel_order = HVS_PIXEL_ORDER_XBGR,
},
{
.drm = DRM_FORMAT_ARGB1555, .hvs = HVS_PIXEL_FORMAT_RGBA5551,
.pixel_order = HVS_PIXEL_ORDER_ABGR,
},
{
.drm = DRM_FORMAT_XRGB1555, .hvs = HVS_PIXEL_FORMAT_RGBA5551,
.pixel_order = HVS_PIXEL_ORDER_ABGR,
},
{
.drm = DRM_FORMAT_RGB888, .hvs = HVS_PIXEL_FORMAT_RGB888,
.pixel_order = HVS_PIXEL_ORDER_XRGB,
},
{
.drm = DRM_FORMAT_BGR888, .hvs = HVS_PIXEL_FORMAT_RGB888,
.pixel_order = HVS_PIXEL_ORDER_XBGR,
},
{
.drm = DRM_FORMAT_YUV422,
.hvs = HVS_PIXEL_FORMAT_YCBCR_YUV422_3PLANE,
.pixel_order = HVS_PIXEL_ORDER_XYCBCR,
},
{
.drm = DRM_FORMAT_YVU422,
.hvs = HVS_PIXEL_FORMAT_YCBCR_YUV422_3PLANE,
.pixel_order = HVS_PIXEL_ORDER_XYCRCB,
},
{
.drm = DRM_FORMAT_YUV420,
.hvs = HVS_PIXEL_FORMAT_YCBCR_YUV420_3PLANE,
.pixel_order = HVS_PIXEL_ORDER_XYCBCR,
},
{
.drm = DRM_FORMAT_YVU420,
.hvs = HVS_PIXEL_FORMAT_YCBCR_YUV420_3PLANE,
.pixel_order = HVS_PIXEL_ORDER_XYCRCB,
},
{
.drm = DRM_FORMAT_NV12,
.hvs = HVS_PIXEL_FORMAT_YCBCR_YUV420_2PLANE,
.pixel_order = HVS_PIXEL_ORDER_XYCBCR,
},
{
.drm = DRM_FORMAT_NV21,
.hvs = HVS_PIXEL_FORMAT_YCBCR_YUV420_2PLANE,
.pixel_order = HVS_PIXEL_ORDER_XYCRCB,
},
{
.drm = DRM_FORMAT_NV16,
.hvs = HVS_PIXEL_FORMAT_YCBCR_YUV422_2PLANE,
.pixel_order = HVS_PIXEL_ORDER_XYCBCR,
},
{
.drm = DRM_FORMAT_NV61,
.hvs = HVS_PIXEL_FORMAT_YCBCR_YUV422_2PLANE,
.pixel_order = HVS_PIXEL_ORDER_XYCRCB,
},
};
static const struct hvs_format *vc4_get_hvs_format(u32 drm_format)
{
unsigned i;
for (i = 0; i < ARRAY_SIZE(hvs_formats); i++) {
if (hvs_formats[i].drm == drm_format)
return &hvs_formats[i];
}
return NULL;
}
static enum vc4_scaling_mode vc4_get_scaling_mode(u32 src, u32 dst)
{
if (dst > src)
return VC4_SCALING_PPF;
else if (dst < src)
return VC4_SCALING_TPZ;
else
return VC4_SCALING_NONE;
}
static bool plane_enabled(struct drm_plane_state *state)
{
return state->fb && state->crtc;
}
static struct drm_plane_state *vc4_plane_duplicate_state(struct drm_plane *plane)
{
struct vc4_plane_state *vc4_state;
if (WARN_ON(!plane->state))
return NULL;
vc4_state = kmemdup(plane->state, sizeof(*vc4_state), GFP_KERNEL);
if (!vc4_state)
return NULL;
memset(&vc4_state->lbm, 0, sizeof(vc4_state->lbm));
__drm_atomic_helper_plane_duplicate_state(plane, &vc4_state->base);
if (vc4_state->dlist) {
vc4_state->dlist = kmemdup(vc4_state->dlist,
vc4_state->dlist_count * 4,
GFP_KERNEL);
if (!vc4_state->dlist) {
kfree(vc4_state);
return NULL;
}
vc4_state->dlist_size = vc4_state->dlist_count;
}
return &vc4_state->base;
}
static void vc4_plane_destroy_state(struct drm_plane *plane,
struct drm_plane_state *state)
{
struct vc4_dev *vc4 = to_vc4_dev(plane->dev);
struct vc4_plane_state *vc4_state = to_vc4_plane_state(state);
if (vc4_state->lbm.allocated) {
unsigned long irqflags;
spin_lock_irqsave(&vc4->hvs->mm_lock, irqflags);
drm_mm_remove_node(&vc4_state->lbm);
spin_unlock_irqrestore(&vc4->hvs->mm_lock, irqflags);
}
kfree(vc4_state->dlist);
__drm_atomic_helper_plane_destroy_state(&vc4_state->base);
kfree(state);
}
/* Called during init to allocate the plane's atomic state. */
static void vc4_plane_reset(struct drm_plane *plane)
{
struct vc4_plane_state *vc4_state;
WARN_ON(plane->state);
vc4_state = kzalloc(sizeof(*vc4_state), GFP_KERNEL);
if (!vc4_state)
return;
plane->state = &vc4_state->base;
plane->state->alpha = DRM_BLEND_ALPHA_OPAQUE;
vc4_state->base.plane = plane;
}
static void vc4_dlist_write(struct vc4_plane_state *vc4_state, u32 val)
{
if (vc4_state->dlist_count == vc4_state->dlist_size) {
u32 new_size = max(4u, vc4_state->dlist_count * 2);
u32 *new_dlist = kmalloc_array(new_size, 4, GFP_KERNEL);
if (!new_dlist)
return;
memcpy(new_dlist, vc4_state->dlist, vc4_state->dlist_count * 4);
kfree(vc4_state->dlist);
vc4_state->dlist = new_dlist;
vc4_state->dlist_size = new_size;
}
vc4_state->dlist[vc4_state->dlist_count++] = val;
}
/* Returns the scl0/scl1 field based on whether the dimensions need to
* be up/down/non-scaled.
*
* This is a replication of a table from the spec.
*/
static u32 vc4_get_scl_field(struct drm_plane_state *state, int plane)
{
struct vc4_plane_state *vc4_state = to_vc4_plane_state(state);
switch (vc4_state->x_scaling[plane] << 2 | vc4_state->y_scaling[plane]) {
case VC4_SCALING_PPF << 2 | VC4_SCALING_PPF:
return SCALER_CTL0_SCL_H_PPF_V_PPF;
case VC4_SCALING_TPZ << 2 | VC4_SCALING_PPF:
return SCALER_CTL0_SCL_H_TPZ_V_PPF;
case VC4_SCALING_PPF << 2 | VC4_SCALING_TPZ:
return SCALER_CTL0_SCL_H_PPF_V_TPZ;
case VC4_SCALING_TPZ << 2 | VC4_SCALING_TPZ:
return SCALER_CTL0_SCL_H_TPZ_V_TPZ;
case VC4_SCALING_PPF << 2 | VC4_SCALING_NONE:
return SCALER_CTL0_SCL_H_PPF_V_NONE;
case VC4_SCALING_NONE << 2 | VC4_SCALING_PPF:
return SCALER_CTL0_SCL_H_NONE_V_PPF;
case VC4_SCALING_NONE << 2 | VC4_SCALING_TPZ:
return SCALER_CTL0_SCL_H_NONE_V_TPZ;
case VC4_SCALING_TPZ << 2 | VC4_SCALING_NONE:
return SCALER_CTL0_SCL_H_TPZ_V_NONE;
default:
case VC4_SCALING_NONE << 2 | VC4_SCALING_NONE:
/* The unity case is independently handled by
* SCALER_CTL0_UNITY.
*/
return 0;
}
}
static int vc4_plane_setup_clipping_and_scaling(struct drm_plane_state *state)
{
struct drm_plane *plane = state->plane;
struct vc4_plane_state *vc4_state = to_vc4_plane_state(state);
struct drm_framebuffer *fb = state->fb;
struct drm_gem_cma_object *bo = drm_fb_cma_get_gem_obj(fb, 0);
u32 subpixel_src_mask = (1 << 16) - 1;
u32 format = fb->format->format;
int num_planes = fb->format->num_planes;
u32 h_subsample = 1;
u32 v_subsample = 1;
int i;
for (i = 0; i < num_planes; i++)
vc4_state->offsets[i] = bo->paddr + fb->offsets[i];
/* We don't support subpixel source positioning for scaling. */
if ((state->src_x & subpixel_src_mask) ||
(state->src_y & subpixel_src_mask) ||
(state->src_w & subpixel_src_mask) ||
(state->src_h & subpixel_src_mask)) {
return -EINVAL;
}
vc4_state->src_x = state->src_x >> 16;
vc4_state->src_y = state->src_y >> 16;
vc4_state->src_w[0] = state->src_w >> 16;
vc4_state->src_h[0] = state->src_h >> 16;
vc4_state->crtc_x = state->crtc_x;
vc4_state->crtc_y = state->crtc_y;
vc4_state->crtc_w = state->crtc_w;
vc4_state->crtc_h = state->crtc_h;
vc4_state->x_scaling[0] = vc4_get_scaling_mode(vc4_state->src_w[0],
vc4_state->crtc_w);
vc4_state->y_scaling[0] = vc4_get_scaling_mode(vc4_state->src_h[0],
vc4_state->crtc_h);
if (num_planes > 1) {
vc4_state->is_yuv = true;
h_subsample = drm_format_horz_chroma_subsampling(format);
v_subsample = drm_format_vert_chroma_subsampling(format);
vc4_state->src_w[1] = vc4_state->src_w[0] / h_subsample;
vc4_state->src_h[1] = vc4_state->src_h[0] / v_subsample;
vc4_state->x_scaling[1] =
vc4_get_scaling_mode(vc4_state->src_w[1],
vc4_state->crtc_w);
vc4_state->y_scaling[1] =
vc4_get_scaling_mode(vc4_state->src_h[1],
vc4_state->crtc_h);
/* YUV conversion requires that scaling be enabled,
* even on a plane that's otherwise 1:1. Choose TPZ
* for simplicity.
*/
if (vc4_state->x_scaling[0] == VC4_SCALING_NONE)
vc4_state->x_scaling[0] = VC4_SCALING_TPZ;
if (vc4_state->y_scaling[0] == VC4_SCALING_NONE)
vc4_state->y_scaling[0] = VC4_SCALING_TPZ;
}
vc4_state->is_unity = (vc4_state->x_scaling[0] == VC4_SCALING_NONE &&
vc4_state->y_scaling[0] == VC4_SCALING_NONE &&
vc4_state->x_scaling[1] == VC4_SCALING_NONE &&
vc4_state->y_scaling[1] == VC4_SCALING_NONE);
/* No configuring scaling on the cursor plane, since it gets
non-vblank-synced updates, and scaling requires requires
LBM changes which have to be vblank-synced.
*/
if (plane->type == DRM_PLANE_TYPE_CURSOR && !vc4_state->is_unity)
return -EINVAL;
/* Clamp the on-screen start x/y to 0. The hardware doesn't
* support negative y, and negative x wastes bandwidth.
*/
if (vc4_state->crtc_x < 0) {
for (i = 0; i < num_planes; i++) {
u32 cpp = fb->format->cpp[i];
u32 subs = ((i == 0) ? 1 : h_subsample);
vc4_state->offsets[i] += (cpp *
(-vc4_state->crtc_x) / subs);
}
vc4_state->src_w[0] += vc4_state->crtc_x;
vc4_state->src_w[1] += vc4_state->crtc_x / h_subsample;
vc4_state->crtc_x = 0;
}
if (vc4_state->crtc_y < 0) {
for (i = 0; i < num_planes; i++) {
u32 subs = ((i == 0) ? 1 : v_subsample);
vc4_state->offsets[i] += (fb->pitches[i] *
(-vc4_state->crtc_y) / subs);
}
vc4_state->src_h[0] += vc4_state->crtc_y;
vc4_state->src_h[1] += vc4_state->crtc_y / v_subsample;
vc4_state->crtc_y = 0;
}
return 0;
}
static void vc4_write_tpz(struct vc4_plane_state *vc4_state, u32 src, u32 dst)
{
u32 scale, recip;
scale = (1 << 16) * src / dst;
/* The specs note that while the reciprocal would be defined
* as (1<<32)/scale, ~0 is close enough.
*/
recip = ~0 / scale;
vc4_dlist_write(vc4_state,
VC4_SET_FIELD(scale, SCALER_TPZ0_SCALE) |
VC4_SET_FIELD(0, SCALER_TPZ0_IPHASE));
vc4_dlist_write(vc4_state,
VC4_SET_FIELD(recip, SCALER_TPZ1_RECIP));
}
static void vc4_write_ppf(struct vc4_plane_state *vc4_state, u32 src, u32 dst)
{
u32 scale = (1 << 16) * src / dst;
vc4_dlist_write(vc4_state,
SCALER_PPF_AGC |
VC4_SET_FIELD(scale, SCALER_PPF_SCALE) |
VC4_SET_FIELD(0, SCALER_PPF_IPHASE));
}
static u32 vc4_lbm_size(struct drm_plane_state *state)
{
struct vc4_plane_state *vc4_state = to_vc4_plane_state(state);
/* This is the worst case number. One of the two sizes will
* be used depending on the scaling configuration.
*/
u32 pix_per_line = max(vc4_state->src_w[0], (u32)vc4_state->crtc_w);
u32 lbm;
if (!vc4_state->is_yuv) {
if (vc4_state->is_unity)
return 0;
else if (vc4_state->y_scaling[0] == VC4_SCALING_TPZ)
lbm = pix_per_line * 8;
else {
/* In special cases, this multiplier might be 12. */
lbm = pix_per_line * 16;
}
} else {
/* There are cases for this going down to a multiplier
* of 2, but according to the firmware source, the
* table in the docs is somewhat wrong.
*/
lbm = pix_per_line * 16;
}
lbm = roundup(lbm, 32);
return lbm;
}
static void vc4_write_scaling_parameters(struct drm_plane_state *state,
int channel)
{
struct vc4_plane_state *vc4_state = to_vc4_plane_state(state);
/* Ch0 H-PPF Word 0: Scaling Parameters */
if (vc4_state->x_scaling[channel] == VC4_SCALING_PPF) {
vc4_write_ppf(vc4_state,
vc4_state->src_w[channel], vc4_state->crtc_w);
}
/* Ch0 V-PPF Words 0-1: Scaling Parameters, Context */
if (vc4_state->y_scaling[channel] == VC4_SCALING_PPF) {
vc4_write_ppf(vc4_state,
vc4_state->src_h[channel], vc4_state->crtc_h);
vc4_dlist_write(vc4_state, 0xc0c0c0c0);
}
/* Ch0 H-TPZ Words 0-1: Scaling Parameters, Recip */
if (vc4_state->x_scaling[channel] == VC4_SCALING_TPZ) {
vc4_write_tpz(vc4_state,
vc4_state->src_w[channel], vc4_state->crtc_w);
}
/* Ch0 V-TPZ Words 0-2: Scaling Parameters, Recip, Context */
if (vc4_state->y_scaling[channel] == VC4_SCALING_TPZ) {
vc4_write_tpz(vc4_state,
vc4_state->src_h[channel], vc4_state->crtc_h);
vc4_dlist_write(vc4_state, 0xc0c0c0c0);
}
}
/* Writes out a full display list for an active plane to the plane's
* private dlist state.
*/
static int vc4_plane_mode_set(struct drm_plane *plane,
struct drm_plane_state *state)
{
struct vc4_dev *vc4 = to_vc4_dev(plane->dev);
struct vc4_plane_state *vc4_state = to_vc4_plane_state(state);
struct drm_framebuffer *fb = state->fb;
u32 ctl0_offset = vc4_state->dlist_count;
const struct hvs_format *format = vc4_get_hvs_format(fb->format->format);
int num_planes = drm_format_num_planes(format->drm);
bool mix_plane_alpha;
bool covers_screen;
u32 scl0, scl1, pitch0;
u32 lbm_size, tiling;
unsigned long irqflags;
int ret, i;
ret = vc4_plane_setup_clipping_and_scaling(state);
if (ret)
return ret;
/* Allocate the LBM memory that the HVS will use for temporary
* storage due to our scaling/format conversion.
*/
lbm_size = vc4_lbm_size(state);
if (lbm_size) {
if (!vc4_state->lbm.allocated) {
spin_lock_irqsave(&vc4->hvs->mm_lock, irqflags);
ret = drm_mm_insert_node_generic(&vc4->hvs->lbm_mm,
&vc4_state->lbm,
lbm_size, 32, 0, 0);
spin_unlock_irqrestore(&vc4->hvs->mm_lock, irqflags);
} else {
WARN_ON_ONCE(lbm_size != vc4_state->lbm.size);
}
}
if (ret)
return ret;
/* SCL1 is used for Cb/Cr scaling of planar formats. For RGB
* and 4:4:4, scl1 should be set to scl0 so both channels of
* the scaler do the same thing. For YUV, the Y plane needs
* to be put in channel 1 and Cb/Cr in channel 0, so we swap
* the scl fields here.
*/
if (num_planes == 1) {
scl0 = vc4_get_scl_field(state, 0);
scl1 = scl0;
} else {
scl0 = vc4_get_scl_field(state, 1);
scl1 = vc4_get_scl_field(state, 0);
}
switch (fb->modifier) {
case DRM_FORMAT_MOD_LINEAR:
tiling = SCALER_CTL0_TILING_LINEAR;
pitch0 = VC4_SET_FIELD(fb->pitches[0], SCALER_SRC_PITCH);
break;
case DRM_FORMAT_MOD_BROADCOM_VC4_T_TILED: {
/* For T-tiled, the FB pitch is "how many bytes from
* one row to the next, such that pitch * tile_h ==
* tile_size * tiles_per_row."
*/
u32 tile_size_shift = 12; /* T tiles are 4kb */
u32 tile_h_shift = 5; /* 16 and 32bpp are 32 pixels high */
u32 tiles_w = fb->pitches[0] >> (tile_size_shift - tile_h_shift);
tiling = SCALER_CTL0_TILING_256B_OR_T;
pitch0 = (VC4_SET_FIELD(0, SCALER_PITCH0_TILE_Y_OFFSET) |
VC4_SET_FIELD(0, SCALER_PITCH0_TILE_WIDTH_L) |
VC4_SET_FIELD(tiles_w, SCALER_PITCH0_TILE_WIDTH_R));
break;
}
default:
DRM_DEBUG_KMS("Unsupported FB tiling flag 0x%16llx",
(long long)fb->modifier);
return -EINVAL;
}
/* Control word */
vc4_dlist_write(vc4_state,
SCALER_CTL0_VALID |
(format->pixel_order << SCALER_CTL0_ORDER_SHIFT) |
(format->hvs << SCALER_CTL0_PIXEL_FORMAT_SHIFT) |
VC4_SET_FIELD(tiling, SCALER_CTL0_TILING) |
(vc4_state->is_unity ? SCALER_CTL0_UNITY : 0) |
VC4_SET_FIELD(scl0, SCALER_CTL0_SCL0) |
VC4_SET_FIELD(scl1, SCALER_CTL0_SCL1));
/* Position Word 0: Image Positions and Alpha Value */
vc4_state->pos0_offset = vc4_state->dlist_count;
vc4_dlist_write(vc4_state,
VC4_SET_FIELD(state->alpha >> 8, SCALER_POS0_FIXED_ALPHA) |
VC4_SET_FIELD(vc4_state->crtc_x, SCALER_POS0_START_X) |
VC4_SET_FIELD(vc4_state->crtc_y, SCALER_POS0_START_Y));
/* Position Word 1: Scaled Image Dimensions. */
if (!vc4_state->is_unity) {
vc4_dlist_write(vc4_state,
VC4_SET_FIELD(vc4_state->crtc_w,
SCALER_POS1_SCL_WIDTH) |
VC4_SET_FIELD(vc4_state->crtc_h,
SCALER_POS1_SCL_HEIGHT));
}
/* Don't waste cycles mixing with plane alpha if the set alpha
* is opaque or there is no per-pixel alpha information.
* In any case we use the alpha property value as the fixed alpha.
*/
mix_plane_alpha = state->alpha != DRM_BLEND_ALPHA_OPAQUE &&
fb->format->has_alpha;
/* Position Word 2: Source Image Size, Alpha */
vc4_state->pos2_offset = vc4_state->dlist_count;
vc4_dlist_write(vc4_state,
VC4_SET_FIELD(fb->format->has_alpha ?
SCALER_POS2_ALPHA_MODE_PIPELINE :
SCALER_POS2_ALPHA_MODE_FIXED,
SCALER_POS2_ALPHA_MODE) |
(mix_plane_alpha ? SCALER_POS2_ALPHA_MIX : 0) |
(fb->format->has_alpha ? SCALER_POS2_ALPHA_PREMULT : 0) |
VC4_SET_FIELD(vc4_state->src_w[0], SCALER_POS2_WIDTH) |
VC4_SET_FIELD(vc4_state->src_h[0], SCALER_POS2_HEIGHT));
/* Position Word 3: Context. Written by the HVS. */
vc4_dlist_write(vc4_state, 0xc0c0c0c0);
/* Pointer Word 0/1/2: RGB / Y / Cb / Cr Pointers
*
* The pointers may be any byte address.
*/
vc4_state->ptr0_offset = vc4_state->dlist_count;
for (i = 0; i < num_planes; i++)
vc4_dlist_write(vc4_state, vc4_state->offsets[i]);
/* Pointer Context Word 0/1/2: Written by the HVS */
for (i = 0; i < num_planes; i++)
vc4_dlist_write(vc4_state, 0xc0c0c0c0);
/* Pitch word 0 */
vc4_dlist_write(vc4_state, pitch0);
/* Pitch word 1/2 */
for (i = 1; i < num_planes; i++) {
vc4_dlist_write(vc4_state,
VC4_SET_FIELD(fb->pitches[i], SCALER_SRC_PITCH));
}
/* Colorspace conversion words */
if (vc4_state->is_yuv) {
vc4_dlist_write(vc4_state, SCALER_CSC0_ITR_R_601_5);
vc4_dlist_write(vc4_state, SCALER_CSC1_ITR_R_601_5);
vc4_dlist_write(vc4_state, SCALER_CSC2_ITR_R_601_5);
}
if (!vc4_state->is_unity) {
/* LBM Base Address. */
if (vc4_state->y_scaling[0] != VC4_SCALING_NONE ||
vc4_state->y_scaling[1] != VC4_SCALING_NONE) {
vc4_dlist_write(vc4_state, vc4_state->lbm.start);
}
if (num_planes > 1) {
/* Emit Cb/Cr as channel 0 and Y as channel
* 1. This matches how we set up scl0/scl1
* above.
*/
vc4_write_scaling_parameters(state, 1);
}
vc4_write_scaling_parameters(state, 0);
/* If any PPF setup was done, then all the kernel
* pointers get uploaded.
*/
if (vc4_state->x_scaling[0] == VC4_SCALING_PPF ||
vc4_state->y_scaling[0] == VC4_SCALING_PPF ||
vc4_state->x_scaling[1] == VC4_SCALING_PPF ||
vc4_state->y_scaling[1] == VC4_SCALING_PPF) {
u32 kernel = VC4_SET_FIELD(vc4->hvs->mitchell_netravali_filter.start,
SCALER_PPF_KERNEL_OFFSET);
/* HPPF plane 0 */
vc4_dlist_write(vc4_state, kernel);
/* VPPF plane 0 */
vc4_dlist_write(vc4_state, kernel);
/* HPPF plane 1 */
vc4_dlist_write(vc4_state, kernel);
/* VPPF plane 1 */
vc4_dlist_write(vc4_state, kernel);
}
}
vc4_state->dlist[ctl0_offset] |=
VC4_SET_FIELD(vc4_state->dlist_count, SCALER_CTL0_SIZE);
/* crtc_* are already clipped coordinates. */
covers_screen = vc4_state->crtc_x == 0 && vc4_state->crtc_y == 0 &&
vc4_state->crtc_w == state->crtc->mode.hdisplay &&
vc4_state->crtc_h == state->crtc->mode.vdisplay;
/* Background fill might be necessary when the plane has per-pixel
* alpha content or a non-opaque plane alpha and could blend from the
* background or does not cover the entire screen.
*/
vc4_state->needs_bg_fill = fb->format->has_alpha || !covers_screen ||
state->alpha != DRM_BLEND_ALPHA_OPAQUE;
return 0;
}
/* If a modeset involves changing the setup of a plane, the atomic
* infrastructure will call this to validate a proposed plane setup.
* However, if a plane isn't getting updated, this (and the
* corresponding vc4_plane_atomic_update) won't get called. Thus, we
* compute the dlist here and have all active plane dlists get updated
* in the CRTC's flush.
*/
static int vc4_plane_atomic_check(struct drm_plane *plane,
struct drm_plane_state *state)
{
struct vc4_plane_state *vc4_state = to_vc4_plane_state(state);
vc4_state->dlist_count = 0;
if (plane_enabled(state))
return vc4_plane_mode_set(plane, state);
else
return 0;
}
static void vc4_plane_atomic_update(struct drm_plane *plane,
struct drm_plane_state *old_state)
{
/* No contents here. Since we don't know where in the CRTC's
* dlist we should be stored, our dlist is uploaded to the
* hardware with vc4_plane_write_dlist() at CRTC atomic_flush
* time.
*/
}
u32 vc4_plane_write_dlist(struct drm_plane *plane, u32 __iomem *dlist)
{
struct vc4_plane_state *vc4_state = to_vc4_plane_state(plane->state);
int i;
vc4_state->hw_dlist = dlist;
/* Can't memcpy_toio() because it needs to be 32-bit writes. */
for (i = 0; i < vc4_state->dlist_count; i++)
writel(vc4_state->dlist[i], &dlist[i]);
return vc4_state->dlist_count;
}
u32 vc4_plane_dlist_size(const struct drm_plane_state *state)
{
const struct vc4_plane_state *vc4_state =
container_of(state, typeof(*vc4_state), base);
return vc4_state->dlist_count;
}
/* Updates the plane to immediately (well, once the FIFO needs
* refilling) scan out from at a new framebuffer.
*/
void vc4_plane_async_set_fb(struct drm_plane *plane, struct drm_framebuffer *fb)
{
struct vc4_plane_state *vc4_state = to_vc4_plane_state(plane->state);
struct drm_gem_cma_object *bo = drm_fb_cma_get_gem_obj(fb, 0);
uint32_t addr;
/* We're skipping the address adjustment for negative origin,
* because this is only called on the primary plane.
*/
WARN_ON_ONCE(plane->state->crtc_x < 0 || plane->state->crtc_y < 0);
addr = bo->paddr + fb->offsets[0];
/* Write the new address into the hardware immediately. The
* scanout will start from this address as soon as the FIFO
* needs to refill with pixels.
*/
writel(addr, &vc4_state->hw_dlist[vc4_state->ptr0_offset]);
/* Also update the CPU-side dlist copy, so that any later
* atomic updates that don't do a new modeset on our plane
* also use our updated address.
*/
vc4_state->dlist[vc4_state->ptr0_offset] = addr;
}
static void vc4_plane_atomic_async_update(struct drm_plane *plane,
struct drm_plane_state *state)
{
struct vc4_plane_state *vc4_state = to_vc4_plane_state(plane->state);
if (plane->state->fb != state->fb) {
vc4_plane_async_set_fb(plane, state->fb);
drm_atomic_set_fb_for_plane(plane->state, state->fb);
}
/* Set the cursor's position on the screen. This is the
* expected change from the drm_mode_cursor_universal()
* helper.
*/
plane->state->crtc_x = state->crtc_x;
plane->state->crtc_y = state->crtc_y;
/* Allow changing the start position within the cursor BO, if
* that matters.
*/
plane->state->src_x = state->src_x;
plane->state->src_y = state->src_y;
/* Update the display list based on the new crtc_x/y. */
vc4_plane_atomic_check(plane, plane->state);
/* Note that we can't just call vc4_plane_write_dlist()
* because that would smash the context data that the HVS is
* currently using.
*/
writel(vc4_state->dlist[vc4_state->pos0_offset],
&vc4_state->hw_dlist[vc4_state->pos0_offset]);
writel(vc4_state->dlist[vc4_state->pos2_offset],
&vc4_state->hw_dlist[vc4_state->pos2_offset]);
writel(vc4_state->dlist[vc4_state->ptr0_offset],
&vc4_state->hw_dlist[vc4_state->ptr0_offset]);
}
static int vc4_plane_atomic_async_check(struct drm_plane *plane,
struct drm_plane_state *state)
{
/* No configuring new scaling in the fast path. */
if (plane->state->crtc_w != state->crtc_w ||
plane->state->crtc_h != state->crtc_h ||
plane->state->src_w != state->src_w ||
plane->state->src_h != state->src_h)
return -EINVAL;
return 0;
}
static int vc4_prepare_fb(struct drm_plane *plane,
struct drm_plane_state *state)
{
struct vc4_bo *bo;
struct dma_fence *fence;
int ret;
if ((plane->state->fb == state->fb) || !state->fb)
return 0;
bo = to_vc4_bo(&drm_fb_cma_get_gem_obj(state->fb, 0)->base);
ret = vc4_bo_inc_usecnt(bo);
if (ret)
return ret;
fence = reservation_object_get_excl_rcu(bo->resv);
drm_atomic_set_fence_for_plane(state, fence);
return 0;
}
static void vc4_cleanup_fb(struct drm_plane *plane,
struct drm_plane_state *state)
{
struct vc4_bo *bo;
if (plane->state->fb == state->fb || !state->fb)
return;
bo = to_vc4_bo(&drm_fb_cma_get_gem_obj(state->fb, 0)->base);
vc4_bo_dec_usecnt(bo);
}
static const struct drm_plane_helper_funcs vc4_plane_helper_funcs = {
.atomic_check = vc4_plane_atomic_check,
.atomic_update = vc4_plane_atomic_update,
.prepare_fb = vc4_prepare_fb,
.cleanup_fb = vc4_cleanup_fb,
.atomic_async_check = vc4_plane_atomic_async_check,
.atomic_async_update = vc4_plane_atomic_async_update,
};
static void vc4_plane_destroy(struct drm_plane *plane)
{
drm_plane_helper_disable(plane);
drm_plane_cleanup(plane);
}
static bool vc4_format_mod_supported(struct drm_plane *plane,
uint32_t format,
uint64_t modifier)
{
/* Support T_TILING for RGB formats only. */
switch (format) {
case DRM_FORMAT_XRGB8888:
case DRM_FORMAT_ARGB8888:
case DRM_FORMAT_ABGR8888:
case DRM_FORMAT_XBGR8888:
case DRM_FORMAT_RGB565:
case DRM_FORMAT_BGR565:
case DRM_FORMAT_ARGB1555:
case DRM_FORMAT_XRGB1555:
return true;
case DRM_FORMAT_YUV422:
case DRM_FORMAT_YVU422:
case DRM_FORMAT_YUV420:
case DRM_FORMAT_YVU420:
case DRM_FORMAT_NV12:
case DRM_FORMAT_NV16:
default:
return (modifier == DRM_FORMAT_MOD_LINEAR);
}
}
static const struct drm_plane_funcs vc4_plane_funcs = {
.update_plane = drm_atomic_helper_update_plane,
.disable_plane = drm_atomic_helper_disable_plane,
.destroy = vc4_plane_destroy,
.set_property = NULL,
.reset = vc4_plane_reset,
.atomic_duplicate_state = vc4_plane_duplicate_state,
.atomic_destroy_state = vc4_plane_destroy_state,
.format_mod_supported = vc4_format_mod_supported,
};
struct drm_plane *vc4_plane_init(struct drm_device *dev,
enum drm_plane_type type)
{
struct drm_plane *plane = NULL;
struct vc4_plane *vc4_plane;
u32 formats[ARRAY_SIZE(hvs_formats)];
u32 num_formats = 0;
int ret = 0;
unsigned i;
static const uint64_t modifiers[] = {
DRM_FORMAT_MOD_BROADCOM_VC4_T_TILED,
DRM_FORMAT_MOD_LINEAR,
DRM_FORMAT_MOD_INVALID
};
vc4_plane = devm_kzalloc(dev->dev, sizeof(*vc4_plane),
GFP_KERNEL);
if (!vc4_plane)
return ERR_PTR(-ENOMEM);
for (i = 0; i < ARRAY_SIZE(hvs_formats); i++) {
/* Don't allow YUV in cursor planes, since that means
* tuning on the scaler, which we don't allow for the
* cursor.
*/
if (type != DRM_PLANE_TYPE_CURSOR ||
hvs_formats[i].hvs < HVS_PIXEL_FORMAT_YCBCR_YUV420_3PLANE) {
formats[num_formats++] = hvs_formats[i].drm;
}
}
plane = &vc4_plane->base;
ret = drm_universal_plane_init(dev, plane, 0,
&vc4_plane_funcs,
formats, num_formats,
modifiers, type, NULL);
drm_plane_helper_add(plane, &vc4_plane_helper_funcs);
drm_plane_create_alpha_property(plane);
return plane;
}
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