// SPDX-License-Identifier: GPL-2.0
//
// Ingenic JZ47xx IPU driver
//
// Copyright (C) 2020, Paul Cercueil <[email protected]>
// Copyright (C) 2020, Daniel Silsby <[email protected]>
#include "ingenic-drm.h"
#include "ingenic-ipu.h"
#include <linux/clk.h>
#include <linux/component.h>
#include <linux/gcd.h>
#include <linux/interrupt.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>
#include <linux/time.h>
#include <drm/drm_atomic.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_damage_helper.h>
#include <drm/drm_drv.h>
#include <drm/drm_fb_dma_helper.h>
#include <drm/drm_fourcc.h>
#include <drm/drm_framebuffer.h>
#include <drm/drm_gem_atomic_helper.h>
#include <drm/drm_gem_dma_helper.h>
#include <drm/drm_gem_framebuffer_helper.h>
#include <drm/drm_plane.h>
#include <drm/drm_property.h>
#include <drm/drm_vblank.h>
struct ingenic_ipu;
struct soc_info {
const u32 *formats;
size_t num_formats;
bool has_bicubic;
bool manual_restart;
void (*set_coefs)(struct ingenic_ipu *ipu, unsigned int reg,
unsigned int sharpness, bool downscale,
unsigned int weight, unsigned int offset);
};
struct ingenic_ipu_private_state {
struct drm_private_state base;
unsigned int num_w, num_h, denom_w, denom_h;
};
struct ingenic_ipu {
struct drm_plane plane;
struct drm_device *drm;
struct device *dev, *master;
struct regmap *map;
struct clk *clk;
const struct soc_info *soc_info;
bool clk_enabled;
dma_addr_t addr_y, addr_u, addr_v;
struct drm_property *sharpness_prop;
unsigned int sharpness;
struct drm_private_obj private_obj;
};
/* Signed 15.16 fixed-point math (for bicubic scaling coefficients) */
#define I2F(i) ((s32)(i) * 65536)
#define F2I(f) ((f) / 65536)
#define FMUL(fa, fb) ((s32)(((s64)(fa) * (s64)(fb)) / 65536))
#define SHARPNESS_INCR (I2F(-1) / 8)
static inline struct ingenic_ipu *plane_to_ingenic_ipu(struct drm_plane *plane)
{
return container_of(plane, struct ingenic_ipu, plane);
}
static inline struct ingenic_ipu_private_state *
to_ingenic_ipu_priv_state(struct drm_private_state *state)
{
return container_of(state, struct ingenic_ipu_private_state, base);
}
static struct ingenic_ipu_private_state *
ingenic_ipu_get_priv_state(struct ingenic_ipu *priv, struct drm_atomic_state *state)
{
struct drm_private_state *priv_state;
priv_state = drm_atomic_get_private_obj_state(state, &priv->private_obj);
if (IS_ERR(priv_state))
return ERR_CAST(priv_state);
return to_ingenic_ipu_priv_state(priv_state);
}
static struct ingenic_ipu_private_state *
ingenic_ipu_get_new_priv_state(struct ingenic_ipu *priv, struct drm_atomic_state *state)
{
struct drm_private_state *priv_state;
priv_state = drm_atomic_get_new_private_obj_state(state, &priv->private_obj);
if (!priv_state)
return NULL;
return to_ingenic_ipu_priv_state(priv_state);
}
/*
* Apply conventional cubic convolution kernel. Both parameters
* and return value are 15.16 signed fixed-point.
*
* @f_a: Sharpness factor, typically in range [-4.0, -0.25].
* A larger magnitude increases perceived sharpness, but going past
* -2.0 might cause ringing artifacts to outweigh any improvement.
* Nice values on a 320x240 LCD are between -0.75 and -2.0.
*
* @f_x: Absolute distance in pixels from 'pixel 0' sample position
* along horizontal (or vertical) source axis. Range is [0, +2.0].
*
* returns: Weight of this pixel within 4-pixel sample group. Range is
* [-2.0, +2.0]. For moderate (i.e. > -3.0) sharpness factors,
* range is within [-1.0, +1.0].
*/
static inline s32 cubic_conv(s32 f_a, s32 f_x)
{
const s32 f_1 = I2F(1);
const s32 f_2 = I2F(2);
const s32 f_3 = I2F(3);
const s32 f_4 = I2F(4);
const s32 f_x2 = FMUL(f_x, f_x);
const s32 f_x3 = FMUL(f_x, f_x2);
if (f_x <= f_1)
return FMUL((f_a + f_2), f_x3) - FMUL((f_a + f_3), f_x2) + f_1;
else if (f_x <= f_2)
return FMUL(f_a, (f_x3 - 5 * f_x2 + 8 * f_x - f_4));
else
return 0;
}
/*
* On entry, "weight" is a coefficient suitable for bilinear mode,
* which is converted to a set of four suitable for bicubic mode.
*
* "weight 512" means all of pixel 0;
* "weight 256" means half of pixel 0 and half of pixel 1;
* "weight 0" means all of pixel 1;
*
* "offset" is increment to next source pixel sample location.
*/
static void jz4760_set_coefs(struct ingenic_ipu *ipu, unsigned int reg,
unsigned int sharpness, bool downscale,
unsigned int weight, unsigned int offset)
{
u32 val;
s32 w0, w1, w2, w3; /* Pixel weights at X (or Y) offsets -1,0,1,2 */
weight = clamp_val(weight, 0, 512);
if (sharpness < 2) {
/*
* When sharpness setting is 0, emulate nearest-neighbor.
* When sharpness setting is 1, emulate bilinear.
*/
if (sharpness == 0)
weight = weight >= 256 ? 512 : 0;
w0 = 0;
w1 = weight;
w2 = 512 - weight;
w3 = 0;
} else {
const s32 f_a = SHARPNESS_INCR * sharpness;
const s32 f_h = I2F(1) / 2; /* Round up 0.5 */
/*
* Note that always rounding towards +infinity here is intended.
* The resulting coefficients match a round-to-nearest-int
* double floating-point implementation.
*/
weight = 512 - weight;
w0 = F2I(f_h + 512 * cubic_conv(f_a, I2F(512 + weight) / 512));
w1 = F2I(f_h + 512 * cubic_conv(f_a, I2F(0 + weight) / 512));
w2 = F2I(f_h + 512 * cubic_conv(f_a, I2F(512 - weight) / 512));
w3 = F2I(f_h + 512 * cubic_conv(f_a, I2F(1024 - weight) / 512));
w0 = clamp_val(w0, -1024, 1023);
w1 = clamp_val(w1, -1024, 1023);
w2 = clamp_val(w2, -1024, 1023);
w3 = clamp_val(w3, -1024, 1023);
}
val = ((w1 & JZ4760_IPU_RSZ_COEF_MASK) << JZ4760_IPU_RSZ_COEF31_LSB) |
((w0 & JZ4760_IPU_RSZ_COEF_MASK) << JZ4760_IPU_RSZ_COEF20_LSB);
regmap_write(ipu->map, reg, val);
val = ((w3 & JZ4760_IPU_RSZ_COEF_MASK) << JZ4760_IPU_RSZ_COEF31_LSB) |
((w2 & JZ4760_IPU_RSZ_COEF_MASK) << JZ4760_IPU_RSZ_COEF20_LSB) |
((offset & JZ4760_IPU_RSZ_OFFSET_MASK) << JZ4760_IPU_RSZ_OFFSET_LSB);
regmap_write(ipu->map, reg, val);
}
static void jz4725b_set_coefs(struct ingenic_ipu *ipu, unsigned int reg,
unsigned int sharpness, bool downscale,
unsigned int weight, unsigned int offset)
{
u32 val = JZ4725B_IPU_RSZ_LUT_OUT_EN;
unsigned int i;
weight = clamp_val(weight, 0, 512);
if (sharpness == 0)
weight = weight >= 256 ? 512 : 0;
val |= (weight & JZ4725B_IPU_RSZ_LUT_COEF_MASK) << JZ4725B_IPU_RSZ_LUT_COEF_LSB;
if (downscale || !!offset)
val |= JZ4725B_IPU_RSZ_LUT_IN_EN;
regmap_write(ipu->map, reg, val);
if (downscale) {
for (i = 1; i < offset; i++)
regmap_write(ipu->map, reg, JZ4725B_IPU_RSZ_LUT_IN_EN);
}
}
static void ingenic_ipu_set_downscale_coefs(struct ingenic_ipu *ipu,
unsigned int reg,
unsigned int num,
unsigned int denom)
{
unsigned int i, offset, weight, weight_num = denom;
for (i = 0; i < num; i++) {
weight_num = num + (weight_num - num) % (num * 2);
weight = 512 - 512 * (weight_num - num) / (num * 2);
weight_num += denom * 2;
offset = (weight_num - num) / (num * 2);
ipu->soc_info->set_coefs(ipu, reg, ipu->sharpness,
true, weight, offset);
}
}
static void ingenic_ipu_set_integer_upscale_coefs(struct ingenic_ipu *ipu,
unsigned int reg,
unsigned int num)
{
/*
* Force nearest-neighbor scaling and use simple math when upscaling
* by an integer ratio. It looks better, and fixes a few problem cases.
*/
unsigned int i;
for (i = 0; i < num; i++)
ipu->soc_info->set_coefs(ipu, reg, 0, false, 512, i == num - 1);
}
static void ingenic_ipu_set_upscale_coefs(struct ingenic_ipu *ipu,
unsigned int reg,
unsigned int num,
unsigned int denom)
{
unsigned int i, offset, weight, weight_num = 0;
for (i = 0; i < num; i++) {
weight = 512 - 512 * weight_num / num;
weight_num += denom;
offset = weight_num >= num;
if (offset)
weight_num -= num;
ipu->soc_info->set_coefs(ipu, reg, ipu->sharpness,
false, weight, offset);
}
}
static void ingenic_ipu_set_coefs(struct ingenic_ipu *ipu, unsigned int reg,
unsigned int num, unsigned int denom)
{
/* Begin programming the LUT */
regmap_write(ipu->map, reg, -1);
if (denom > num)
ingenic_ipu_set_downscale_coefs(ipu, reg, num, denom);
else if (denom == 1)
ingenic_ipu_set_integer_upscale_coefs(ipu, reg, num);
else
ingenic_ipu_set_upscale_coefs(ipu, reg, num, denom);
}
static int reduce_fraction(unsigned int *num, unsigned int *denom)
{
unsigned long d = gcd(*num, *denom);
/* The scaling table has only 31 entries */
if (*num > 31 * d)
return -EINVAL;
*num /= d;
*denom /= d;
return 0;
}
static inline bool osd_changed(struct drm_plane_state *state,
struct drm_plane_state *oldstate)
{
return state->src_x != oldstate->src_x ||
state->src_y != oldstate->src_y ||
state->src_w != oldstate->src_w ||
state->src_h != oldstate->src_h ||
state->crtc_x != oldstate->crtc_x ||
state->crtc_y != oldstate->crtc_y ||
state->crtc_w != oldstate->crtc_w ||
state->crtc_h != oldstate->crtc_h;
}
static void ingenic_ipu_plane_atomic_update(struct drm_plane *plane,
struct drm_atomic_state *state)
{
struct ingenic_ipu *ipu = plane_to_ingenic_ipu(plane);
struct drm_plane_state *newstate = drm_atomic_get_new_plane_state(state, plane);
struct drm_plane_state *oldstate = drm_atomic_get_old_plane_state(state, plane);
const struct drm_format_info *finfo;
u32 ctrl, stride = 0, coef_index = 0, format = 0;
bool needs_modeset, upscaling_w, upscaling_h;
struct ingenic_ipu_private_state *ipu_state;
int err;
if (!newstate || !newstate->fb)
return;
ipu_state = ingenic_ipu_get_new_priv_state(ipu, state);
if (WARN_ON(!ipu_state))
return;
finfo = drm_format_info(newstate->fb->format->format);
if (!ipu->clk_enabled) {
err = clk_enable(ipu->clk);
if (err) {
dev_err(ipu->dev, "Unable to enable clock: %d\n", err);
return;
}
ipu->clk_enabled = true;
}
/* Reset all the registers if needed */
needs_modeset = drm_atomic_crtc_needs_modeset(newstate->crtc->state);
if (needs_modeset) {
regmap_set_bits(ipu->map, JZ_REG_IPU_CTRL, JZ_IPU_CTRL_RST);
/* Enable the chip */
regmap_set_bits(ipu->map, JZ_REG_IPU_CTRL,
JZ_IPU_CTRL_CHIP_EN | JZ_IPU_CTRL_LCDC_SEL);
}
if (ingenic_drm_map_noncoherent(ipu->master))
drm_fb_dma_sync_non_coherent(ipu->drm, oldstate, newstate);
/* New addresses will be committed in vblank handler... */
ipu->addr_y = drm_fb_dma_get_gem_addr(newstate->fb, newstate, 0);
if (finfo->num_planes > 1)
ipu->addr_u = drm_fb_dma_get_gem_addr(newstate->fb, newstate,
1);
if (finfo->num_planes > 2)
ipu->addr_v = drm_fb_dma_get_gem_addr(newstate->fb, newstate,
2);
if (!needs_modeset)
return;
/* Or right here if we're doing a full modeset. */
regmap_write(ipu->map, JZ_REG_IPU_Y_ADDR, ipu->addr_y);
regmap_write(ipu->map, JZ_REG_IPU_U_ADDR, ipu->addr_u);
regmap_write(ipu->map, JZ_REG_IPU_V_ADDR, ipu->addr_v);
if (finfo->num_planes == 1)
regmap_set_bits(ipu->map, JZ_REG_IPU_CTRL, JZ_IPU_CTRL_SPKG_SEL);
ingenic_drm_plane_config(ipu->master, plane, DRM_FORMAT_XRGB8888);
/* Set the input height/width/strides */
if (finfo->num_planes > 2)
stride = ((newstate->src_w >> 16) * finfo->cpp[2] / finfo->hsub)
<< JZ_IPU_UV_STRIDE_V_LSB;
if (finfo->num_planes > 1)
stride |= ((newstate->src_w >> 16) * finfo->cpp[1] / finfo->hsub)
<< JZ_IPU_UV_STRIDE_U_LSB;
regmap_write(ipu->map, JZ_REG_IPU_UV_STRIDE, stride);
stride = ((newstate->src_w >> 16) * finfo->cpp[0]) << JZ_IPU_Y_STRIDE_Y_LSB;
regmap_write(ipu->map, JZ_REG_IPU_Y_STRIDE, stride);
regmap_write(ipu->map, JZ_REG_IPU_IN_GS,
(stride << JZ_IPU_IN_GS_W_LSB) |
((newstate->src_h >> 16) << JZ_IPU_IN_GS_H_LSB));
switch (finfo->format) {
case DRM_FORMAT_XRGB1555:
format = JZ_IPU_D_FMT_IN_FMT_RGB555 |
JZ_IPU_D_FMT_RGB_OUT_OFT_RGB;
break;
case DRM_FORMAT_XBGR1555:
format = JZ_IPU_D_FMT_IN_FMT_RGB555 |
JZ_IPU_D_FMT_RGB_OUT_OFT_BGR;
break;
case DRM_FORMAT_RGB565:
format = JZ_IPU_D_FMT_IN_FMT_RGB565 |
JZ_IPU_D_FMT_RGB_OUT_OFT_RGB;
break;
case DRM_FORMAT_BGR565:
format = JZ_IPU_D_FMT_IN_FMT_RGB565 |
JZ_IPU_D_FMT_RGB_OUT_OFT_BGR;
break;
case DRM_FORMAT_XRGB8888:
case DRM_FORMAT_XYUV8888:
format = JZ_IPU_D_FMT_IN_FMT_RGB888 |
JZ_IPU_D_FMT_RGB_OUT_OFT_RGB;
break;
case DRM_FORMAT_XBGR8888:
format = JZ_IPU_D_FMT_IN_FMT_RGB888 |
JZ_IPU_D_FMT_RGB_OUT_OFT_BGR;
break;
case DRM_FORMAT_YUYV:
format = JZ_IPU_D_FMT_IN_FMT_YUV422 |
JZ_IPU_D_FMT_YUV_VY1UY0;
break;
case DRM_FORMAT_YVYU:
format = JZ_IPU_D_FMT_IN_FMT_YUV422 |
JZ_IPU_D_FMT_YUV_UY1VY0;
break;
case DRM_FORMAT_UYVY:
format = JZ_IPU_D_FMT_IN_FMT_YUV422 |
JZ_IPU_D_FMT_YUV_Y1VY0U;
break;
case DRM_FORMAT_VYUY:
format = JZ_IPU_D_FMT_IN_FMT_YUV422 |
JZ_IPU_D_FMT_YUV_Y1UY0V;
break;
case DRM_FORMAT_YUV411:
format = JZ_IPU_D_FMT_IN_FMT_YUV411;
break;
case DRM_FORMAT_YUV420:
format = JZ_IPU_D_FMT_IN_FMT_YUV420;
break;
case DRM_FORMAT_YUV422:
format = JZ_IPU_D_FMT_IN_FMT_YUV422;
break;
case DRM_FORMAT_YUV444:
format = JZ_IPU_D_FMT_IN_FMT_YUV444;
break;
default:
WARN_ONCE(1, "Unsupported format");
break;
}
/* Fix output to RGB888 */
format |= JZ_IPU_D_FMT_OUT_FMT_RGB888;
/* Set pixel format */
regmap_write(ipu->map, JZ_REG_IPU_D_FMT, format);
/* Set the output height/width/stride */
regmap_write(ipu->map, JZ_REG_IPU_OUT_GS,
((newstate->crtc_w * 4) << JZ_IPU_OUT_GS_W_LSB)
| newstate->crtc_h << JZ_IPU_OUT_GS_H_LSB);
regmap_write(ipu->map, JZ_REG_IPU_OUT_STRIDE, newstate->crtc_w * 4);
if (finfo->is_yuv) {
regmap_set_bits(ipu->map, JZ_REG_IPU_CTRL, JZ_IPU_CTRL_CSC_EN);
/*
* Offsets for Chroma/Luma.
* y = source Y - LUMA,
* u = source Cb - CHROMA,
* v = source Cr - CHROMA
*/
regmap_write(ipu->map, JZ_REG_IPU_CSC_OFFSET,
128 << JZ_IPU_CSC_OFFSET_CHROMA_LSB |
0 << JZ_IPU_CSC_OFFSET_LUMA_LSB);
/*
* YUV422 to RGB conversion table.
* R = C0 / 0x400 * y + C1 / 0x400 * v
* G = C0 / 0x400 * y - C2 / 0x400 * u - C3 / 0x400 * v
* B = C0 / 0x400 * y + C4 / 0x400 * u
*/
regmap_write(ipu->map, JZ_REG_IPU_CSC_C0_COEF, 0x4a8);
regmap_write(ipu->map, JZ_REG_IPU_CSC_C1_COEF, 0x662);
regmap_write(ipu->map, JZ_REG_IPU_CSC_C2_COEF, 0x191);
regmap_write(ipu->map, JZ_REG_IPU_CSC_C3_COEF, 0x341);
regmap_write(ipu->map, JZ_REG_IPU_CSC_C4_COEF, 0x811);
}
ctrl = 0;
/*
* Must set ZOOM_SEL before programming bicubic LUTs.
* If the IPU supports bicubic, we enable it unconditionally, since it
* can do anything bilinear can and more.
*/
if (ipu->soc_info->has_bicubic)
ctrl |= JZ_IPU_CTRL_ZOOM_SEL;
upscaling_w = ipu_state->num_w > ipu_state->denom_w;
if (upscaling_w)
ctrl |= JZ_IPU_CTRL_HSCALE;
if (ipu_state->num_w != 1 || ipu_state->denom_w != 1) {
if (!ipu->soc_info->has_bicubic && !upscaling_w)
coef_index |= (ipu_state->denom_w - 1) << 16;
else
coef_index |= (ipu_state->num_w - 1) << 16;
ctrl |= JZ_IPU_CTRL_HRSZ_EN;
}
upscaling_h = ipu_state->num_h > ipu_state->denom_h;
if (upscaling_h)
ctrl |= JZ_IPU_CTRL_VSCALE;
if (ipu_state->num_h != 1 || ipu_state->denom_h != 1) {
if (!ipu->soc_info->has_bicubic && !upscaling_h)
coef_index |= ipu_state->denom_h - 1;
else
coef_index |= ipu_state->num_h - 1;
ctrl |= JZ_IPU_CTRL_VRSZ_EN;
}
regmap_update_bits(ipu->map, JZ_REG_IPU_CTRL, JZ_IPU_CTRL_ZOOM_SEL |
JZ_IPU_CTRL_HRSZ_EN | JZ_IPU_CTRL_VRSZ_EN |
JZ_IPU_CTRL_HSCALE | JZ_IPU_CTRL_VSCALE, ctrl);
/* Set the LUT index register */
regmap_write(ipu->map, JZ_REG_IPU_RSZ_COEF_INDEX, coef_index);
if (ipu_state->num_w != 1 || ipu_state->denom_w != 1)
ingenic_ipu_set_coefs(ipu, JZ_REG_IPU_HRSZ_COEF_LUT,
ipu_state->num_w, ipu_state->denom_w);
if (ipu_state->num_h != 1 || ipu_state->denom_h != 1)
ingenic_ipu_set_coefs(ipu, JZ_REG_IPU_VRSZ_COEF_LUT,
ipu_state->num_h, ipu_state->denom_h);
/* Clear STATUS register */
regmap_write(ipu->map, JZ_REG_IPU_STATUS, 0);
/* Start IPU */
regmap_set_bits(ipu->map, JZ_REG_IPU_CTRL,
JZ_IPU_CTRL_RUN | JZ_IPU_CTRL_FM_IRQ_EN);
dev_dbg(ipu->dev, "Scaling %ux%u to %ux%u (%u:%u horiz, %u:%u vert)\n",
newstate->src_w >> 16, newstate->src_h >> 16,
newstate->crtc_w, newstate->crtc_h,
ipu_state->num_w, ipu_state->denom_w,
ipu_state->num_h, ipu_state->denom_h);
}
static int ingenic_ipu_plane_atomic_check(struct drm_plane *plane,
struct drm_atomic_state *state)
{
struct drm_plane_state *old_plane_state = drm_atomic_get_old_plane_state(state,
plane);
struct drm_plane_state *new_plane_state = drm_atomic_get_new_plane_state(state,
plane);
unsigned int num_w, denom_w, num_h, denom_h, xres, yres, max_w, max_h;
struct ingenic_ipu *ipu = plane_to_ingenic_ipu(plane);
struct drm_crtc *crtc = new_plane_state->crtc ?: old_plane_state->crtc;
struct drm_crtc_state *crtc_state;
struct ingenic_ipu_private_state *ipu_state;
if (!crtc)
return 0;
crtc_state = drm_atomic_get_existing_crtc_state(state, crtc);
if (WARN_ON(!crtc_state))
return -EINVAL;
ipu_state = ingenic_ipu_get_priv_state(ipu, state);
if (IS_ERR(ipu_state))
return PTR_ERR(ipu_state);
/* Request a full modeset if we are enabling or disabling the IPU. */
if (!old_plane_state->crtc ^ !new_plane_state->crtc)
crtc_state->mode_changed = true;
if (!new_plane_state->crtc ||
!crtc_state->mode.hdisplay || !crtc_state->mode.vdisplay)
goto out_check_damage;
/* Plane must be fully visible */
if (new_plane_state->crtc_x < 0 || new_plane_state->crtc_y < 0 ||
new_plane_state->crtc_x + new_plane_state->crtc_w > crtc_state->mode.hdisplay ||
new_plane_state->crtc_y + new_plane_state->crtc_h > crtc_state->mode.vdisplay)
return -EINVAL;
/* Minimum size is 4x4 */
if ((new_plane_state->src_w >> 16) < 4 || (new_plane_state->src_h >> 16) < 4)
return -EINVAL;
/* Input and output lines must have an even number of pixels. */
if (((new_plane_state->src_w >> 16) & 1) || (new_plane_state->crtc_w & 1))
return -EINVAL;
if (!osd_changed(new_plane_state, old_plane_state))
goto out_check_damage;
crtc_state->mode_changed = true;
xres = new_plane_state->src_w >> 16;
yres = new_plane_state->src_h >> 16;
/*
* Increase the scaled image's theorical width/height until we find a
* configuration that has valid scaling coefficients, up to 102% of the
* screen's resolution. This makes sure that we can scale from almost
* every resolution possible at the cost of a very small distorsion.
* The CRTC_W / CRTC_H are not modified.
*/
max_w = crtc_state->mode.hdisplay * 102 / 100;
max_h = crtc_state->mode.vdisplay * 102 / 100;
for (denom_w = xres, num_w = new_plane_state->crtc_w; num_w <= max_w; num_w++)
if (!reduce_fraction(&num_w, &denom_w))
break;
if (num_w > max_w)
return -EINVAL;
for (denom_h = yres, num_h = new_plane_state->crtc_h; num_h <= max_h; num_h++)
if (!reduce_fraction(&num_h, &denom_h))
break;
if (num_h > max_h)
return -EINVAL;
ipu_state->num_w = num_w;
ipu_state->num_h = num_h;
ipu_state->denom_w = denom_w;
ipu_state->denom_h = denom_h;
out_check_damage:
if (ingenic_drm_map_noncoherent(ipu->master))
drm_atomic_helper_check_plane_damage(state, new_plane_state);
return 0;
}
static void ingenic_ipu_plane_atomic_disable(struct drm_plane *plane,
struct drm_atomic_state *state)
{
struct ingenic_ipu *ipu = plane_to_ingenic_ipu(plane);
regmap_set_bits(ipu->map, JZ_REG_IPU_CTRL, JZ_IPU_CTRL_STOP);
regmap_clear_bits(ipu->map, JZ_REG_IPU_CTRL, JZ_IPU_CTRL_CHIP_EN);
ingenic_drm_plane_disable(ipu->master, plane);
if (ipu->clk_enabled) {
clk_disable(ipu->clk);
ipu->clk_enabled = false;
}
}
static const struct drm_plane_helper_funcs ingenic_ipu_plane_helper_funcs = {
.atomic_update = ingenic_ipu_plane_atomic_update,
.atomic_check = ingenic_ipu_plane_atomic_check,
.atomic_disable = ingenic_ipu_plane_atomic_disable,
};
static int
ingenic_ipu_plane_atomic_get_property(struct drm_plane *plane,
const struct drm_plane_state *state,
struct drm_property *property, u64 *val)
{
struct ingenic_ipu *ipu = plane_to_ingenic_ipu(plane);
if (property != ipu->sharpness_prop)
return -EINVAL;
*val = ipu->sharpness;
return 0;
}
static int
ingenic_ipu_plane_atomic_set_property(struct drm_plane *plane,
struct drm_plane_state *state,
struct drm_property *property, u64 val)
{
struct ingenic_ipu *ipu = plane_to_ingenic_ipu(plane);
struct drm_crtc_state *crtc_state;
bool mode_changed;
if (property != ipu->sharpness_prop)
return -EINVAL;
mode_changed = val != ipu->sharpness;
ipu->sharpness = val;
if (state->crtc) {
crtc_state = drm_atomic_get_existing_crtc_state(state->state, state->crtc);
if (WARN_ON(!crtc_state))
return -EINVAL;
crtc_state->mode_changed |= mode_changed;
}
return 0;
}
static const struct drm_plane_funcs ingenic_ipu_plane_funcs = {
.update_plane = drm_atomic_helper_update_plane,
.disable_plane = drm_atomic_helper_disable_plane,
.reset = drm_atomic_helper_plane_reset,
.destroy = drm_plane_cleanup,
.atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state,
.atomic_destroy_state = drm_atomic_helper_plane_destroy_state,
.atomic_get_property = ingenic_ipu_plane_atomic_get_property,
.atomic_set_property = ingenic_ipu_plane_atomic_set_property,
};
static struct drm_private_state *
ingenic_ipu_duplicate_state(struct drm_private_obj *obj)
{
struct ingenic_ipu_private_state *state = to_ingenic_ipu_priv_state(obj->state);
state = kmemdup(state, sizeof(*state), GFP_KERNEL);
if (!state)
return NULL;
__drm_atomic_helper_private_obj_duplicate_state(obj, &state->base);
return &state->base;
}
static void ingenic_ipu_destroy_state(struct drm_private_obj *obj,
struct drm_private_state *state)
{
struct ingenic_ipu_private_state *priv_state = to_ingenic_ipu_priv_state(state);
kfree(priv_state);
}
static const struct drm_private_state_funcs ingenic_ipu_private_state_funcs = {
.atomic_duplicate_state = ingenic_ipu_duplicate_state,
.atomic_destroy_state = ingenic_ipu_destroy_state,
};
static irqreturn_t ingenic_ipu_irq_handler(int irq, void *arg)
{
struct ingenic_ipu *ipu = arg;
struct drm_crtc *crtc = drm_crtc_from_index(ipu->drm, 0);
unsigned int dummy;
/* dummy read allows CPU to reconfigure IPU */
if (ipu->soc_info->manual_restart)
regmap_read(ipu->map, JZ_REG_IPU_STATUS, &dummy);
/* ACK interrupt */
regmap_write(ipu->map, JZ_REG_IPU_STATUS, 0);
/* Set previously cached addresses */
regmap_write(ipu->map, JZ_REG_IPU_Y_ADDR, ipu->addr_y);
regmap_write(ipu->map, JZ_REG_IPU_U_ADDR, ipu->addr_u);
regmap_write(ipu->map, JZ_REG_IPU_V_ADDR, ipu->addr_v);
/* Run IPU for the new frame */
if (ipu->soc_info->manual_restart)
regmap_set_bits(ipu->map, JZ_REG_IPU_CTRL, JZ_IPU_CTRL_RUN);
drm_crtc_handle_vblank(crtc);
return IRQ_HANDLED;
}
static const struct regmap_config ingenic_ipu_regmap_config = {
.reg_bits = 32,
.val_bits = 32,
.reg_stride = 4,
.max_register = JZ_REG_IPU_OUT_PHY_T_ADDR,
};
static int ingenic_ipu_bind(struct device *dev, struct device *master, void *d)
{
struct platform_device *pdev = to_platform_device(dev);
struct ingenic_ipu_private_state *private_state;
const struct soc_info *soc_info;
struct drm_device *drm = d;
struct drm_plane *plane;
struct ingenic_ipu *ipu;
void __iomem *base;
unsigned int sharpness_max;
int err, irq;
ipu = devm_kzalloc(dev, sizeof(*ipu), GFP_KERNEL);
if (!ipu)
return -ENOMEM;
soc_info = of_device_get_match_data(dev);
if (!soc_info) {
dev_err(dev, "Missing platform data\n");
return -EINVAL;
}
ipu->dev = dev;
ipu->drm = drm;
ipu->master = master;
ipu->soc_info = soc_info;
base = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(base)) {
dev_err(dev, "Failed to get memory resource\n");
return PTR_ERR(base);
}
ipu->map = devm_regmap_init_mmio(dev, base, &ingenic_ipu_regmap_config);
if (IS_ERR(ipu->map)) {
dev_err(dev, "Failed to create regmap\n");
return PTR_ERR(ipu->map);
}
irq = platform_get_irq(pdev, 0);
if (irq < 0)
return irq;
ipu->clk = devm_clk_get(dev, "ipu");
if (IS_ERR(ipu->clk)) {
dev_err(dev, "Failed to get pixel clock\n");
return PTR_ERR(ipu->clk);
}
err = devm_request_irq(dev, irq, ingenic_ipu_irq_handler, 0,
dev_name(dev), ipu);
if (err) {
dev_err(dev, "Unable to request IRQ\n");
return err;
}
plane = &ipu->plane;
dev_set_drvdata(dev, plane);
drm_plane_helper_add(plane, &ingenic_ipu_plane_helper_funcs);
err = drm_universal_plane_init(drm, plane, 1, &ingenic_ipu_plane_funcs,
soc_info->formats, soc_info->num_formats,
NULL, DRM_PLANE_TYPE_OVERLAY, NULL);
if (err) {
dev_err(dev, "Failed to init plane: %i\n", err);
return err;
}
if (ingenic_drm_map_noncoherent(master))
drm_plane_enable_fb_damage_clips(plane);
/*
* Sharpness settings range is [0,32]
* 0 : nearest-neighbor
* 1 : bilinear
* 2 .. 32 : bicubic (translated to sharpness factor -0.25 .. -4.0)
*/
sharpness_max = soc_info->has_bicubic ? 32 : 1;
ipu->sharpness_prop = drm_property_create_range(drm, 0, "sharpness",
0, sharpness_max);
if (!ipu->sharpness_prop) {
dev_err(dev, "Unable to create sharpness property\n");
return -ENOMEM;
}
/* Default sharpness factor: -0.125 * 8 = -1.0 */
ipu->sharpness = soc_info->has_bicubic ? 8 : 1;
drm_object_attach_property(&plane->base, ipu->sharpness_prop,
ipu->sharpness);
err = clk_prepare(ipu->clk);
if (err) {
dev_err(dev, "Unable to prepare clock\n");
return err;
}
private_state = kzalloc(sizeof(*private_state), GFP_KERNEL);
if (!private_state) {
err = -ENOMEM;
goto err_clk_unprepare;
}
drm_atomic_private_obj_init(drm, &ipu->private_obj, &private_state->base,
&ingenic_ipu_private_state_funcs);
return 0;
err_clk_unprepare:
clk_unprepare(ipu->clk);
return err;
}
static void ingenic_ipu_unbind(struct device *dev,
struct device *master, void *d)
{
struct ingenic_ipu *ipu = dev_get_drvdata(dev);
drm_atomic_private_obj_fini(&ipu->private_obj);
clk_unprepare(ipu->clk);
}
static const struct component_ops ingenic_ipu_ops = {
.bind = ingenic_ipu_bind,
.unbind = ingenic_ipu_unbind,
};
static int ingenic_ipu_probe(struct platform_device *pdev)
{
return component_add(&pdev->dev, &ingenic_ipu_ops);
}
static void ingenic_ipu_remove(struct platform_device *pdev)
{
component_del(&pdev->dev, &ingenic_ipu_ops);
}
static const u32 jz4725b_ipu_formats[] = {
/*
* While officially supported, packed YUV 4:2:2 formats can cause
* random hardware crashes on JZ4725B under certain circumstances.
* It seems to happen with some specific resize ratios.
* Until a proper workaround or fix is found, disable these formats.
DRM_FORMAT_YUYV,
DRM_FORMAT_YVYU,
DRM_FORMAT_UYVY,
DRM_FORMAT_VYUY,
*/
DRM_FORMAT_YUV411,
DRM_FORMAT_YUV420,
DRM_FORMAT_YUV422,
DRM_FORMAT_YUV444,
};
static const struct soc_info jz4725b_soc_info = {
.formats = jz4725b_ipu_formats,
.num_formats = ARRAY_SIZE(jz4725b_ipu_formats),
.has_bicubic = false,
.manual_restart = true,
.set_coefs = jz4725b_set_coefs,
};
static const u32 jz4760_ipu_formats[] = {
DRM_FORMAT_XRGB1555,
DRM_FORMAT_XBGR1555,
DRM_FORMAT_RGB565,
DRM_FORMAT_BGR565,
DRM_FORMAT_XRGB8888,
DRM_FORMAT_XBGR8888,
DRM_FORMAT_YUYV,
DRM_FORMAT_YVYU,
DRM_FORMAT_UYVY,
DRM_FORMAT_VYUY,
DRM_FORMAT_YUV411,
DRM_FORMAT_YUV420,
DRM_FORMAT_YUV422,
DRM_FORMAT_YUV444,
DRM_FORMAT_XYUV8888,
};
static const struct soc_info jz4760_soc_info = {
.formats = jz4760_ipu_formats,
.num_formats = ARRAY_SIZE(jz4760_ipu_formats),
.has_bicubic = true,
.manual_restart = false,
.set_coefs = jz4760_set_coefs,
};
static const struct of_device_id ingenic_ipu_of_match[] = {
{ .compatible = "ingenic,jz4725b-ipu", .data = &jz4725b_soc_info },
{ .compatible = "ingenic,jz4760-ipu", .data = &jz4760_soc_info },
{ /* sentinel */ },
};
MODULE_DEVICE_TABLE(of, ingenic_ipu_of_match);
static struct platform_driver ingenic_ipu_driver = {
.driver = {
.name = "ingenic-ipu",
.of_match_table = ingenic_ipu_of_match,
},
.probe = ingenic_ipu_probe,
.remove_new = ingenic_ipu_remove,
};
struct platform_driver *ingenic_ipu_driver_ptr = &ingenic_ipu_driver;
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