// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright (C) 2016 Marek Vasut <[email protected]>
*
* This code is based on drivers/video/fbdev/mxsfb.c :
* Copyright (C) 2010 Juergen Beisert, Pengutronix
* Copyright (C) 2008-2009 Freescale Semiconductor, Inc. All Rights Reserved.
* Copyright (C) 2008 Embedded Alley Solutions, Inc All Rights Reserved.
*/
#include <linux/clk.h>
#include <linux/io.h>
#include <linux/iopoll.h>
#include <linux/media-bus-format.h>
#include <linux/pm_runtime.h>
#include <linux/spinlock.h>
#include <drm/drm_atomic.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_bridge.h>
#include <drm/drm_crtc.h>
#include <drm/drm_encoder.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_plane.h>
#include <drm/drm_vblank.h>
#include "mxsfb_drv.h"
#include "mxsfb_regs.h"
/* 1 second delay should be plenty of time for block reset */
#define RESET_TIMEOUT 1000000
/* -----------------------------------------------------------------------------
* CRTC
*/
static u32 set_hsync_pulse_width(struct mxsfb_drm_private *mxsfb, u32 val)
{
return (val & mxsfb->devdata->hs_wdth_mask) <<
mxsfb->devdata->hs_wdth_shift;
}
/*
* Setup the MXSFB registers for decoding the pixels out of the framebuffer and
* outputting them on the bus.
*/
static void mxsfb_set_formats(struct mxsfb_drm_private *mxsfb,
const u32 bus_format)
{
struct drm_device *drm = mxsfb->drm;
const u32 format = mxsfb->crtc.primary->state->fb->format->format;
u32 ctrl, ctrl1;
DRM_DEV_DEBUG_DRIVER(drm->dev, "Using bus_format: 0x%08X\n",
bus_format);
ctrl = CTRL_BYPASS_COUNT | CTRL_MASTER;
/* CTRL1 contains IRQ config and status bits, preserve those. */
ctrl1 = readl(mxsfb->base + LCDC_CTRL1);
ctrl1 &= CTRL1_CUR_FRAME_DONE_IRQ_EN | CTRL1_CUR_FRAME_DONE_IRQ;
switch (format) {
case DRM_FORMAT_RGB565:
dev_dbg(drm->dev, "Setting up RGB565 mode\n");
ctrl |= CTRL_WORD_LENGTH_16;
ctrl1 |= CTRL1_SET_BYTE_PACKAGING(0xf);
break;
case DRM_FORMAT_XRGB8888:
dev_dbg(drm->dev, "Setting up XRGB8888 mode\n");
ctrl |= CTRL_WORD_LENGTH_24;
/* Do not use packed pixels = one pixel per word instead. */
ctrl1 |= CTRL1_SET_BYTE_PACKAGING(0x7);
break;
}
switch (bus_format) {
case MEDIA_BUS_FMT_RGB565_1X16:
ctrl |= CTRL_BUS_WIDTH_16;
break;
case MEDIA_BUS_FMT_RGB666_1X18:
ctrl |= CTRL_BUS_WIDTH_18;
break;
case MEDIA_BUS_FMT_RGB888_1X24:
ctrl |= CTRL_BUS_WIDTH_24;
break;
default:
dev_err(drm->dev, "Unknown media bus format 0x%x\n", bus_format);
break;
}
writel(ctrl1, mxsfb->base + LCDC_CTRL1);
writel(ctrl, mxsfb->base + LCDC_CTRL);
}
static void mxsfb_set_mode(struct mxsfb_drm_private *mxsfb, u32 bus_flags)
{
struct drm_display_mode *m = &mxsfb->crtc.state->adjusted_mode;
u32 vdctrl0, vsync_pulse_len, hsync_pulse_len;
writel(TRANSFER_COUNT_SET_VCOUNT(m->crtc_vdisplay) |
TRANSFER_COUNT_SET_HCOUNT(m->crtc_hdisplay),
mxsfb->base + mxsfb->devdata->transfer_count);
vsync_pulse_len = m->crtc_vsync_end - m->crtc_vsync_start;
vdctrl0 = VDCTRL0_ENABLE_PRESENT | /* Always in DOTCLOCK mode */
VDCTRL0_VSYNC_PERIOD_UNIT |
VDCTRL0_VSYNC_PULSE_WIDTH_UNIT |
VDCTRL0_SET_VSYNC_PULSE_WIDTH(vsync_pulse_len);
if (m->flags & DRM_MODE_FLAG_PHSYNC)
vdctrl0 |= VDCTRL0_HSYNC_ACT_HIGH;
if (m->flags & DRM_MODE_FLAG_PVSYNC)
vdctrl0 |= VDCTRL0_VSYNC_ACT_HIGH;
/* Make sure Data Enable is high active by default */
if (!(bus_flags & DRM_BUS_FLAG_DE_LOW))
vdctrl0 |= VDCTRL0_ENABLE_ACT_HIGH;
/*
* DRM_BUS_FLAG_PIXDATA_DRIVE_ defines are controller centric,
* controllers VDCTRL0_DOTCLK is display centric.
* Drive on positive edge -> display samples on falling edge
* DRM_BUS_FLAG_PIXDATA_DRIVE_POSEDGE -> VDCTRL0_DOTCLK_ACT_FALLING
*/
if (bus_flags & DRM_BUS_FLAG_PIXDATA_DRIVE_POSEDGE)
vdctrl0 |= VDCTRL0_DOTCLK_ACT_FALLING;
writel(vdctrl0, mxsfb->base + LCDC_VDCTRL0);
/* Frame length in lines. */
writel(m->crtc_vtotal, mxsfb->base + LCDC_VDCTRL1);
/* Line length in units of clocks or pixels. */
hsync_pulse_len = m->crtc_hsync_end - m->crtc_hsync_start;
writel(set_hsync_pulse_width(mxsfb, hsync_pulse_len) |
VDCTRL2_SET_HSYNC_PERIOD(m->crtc_htotal),
mxsfb->base + LCDC_VDCTRL2);
writel(SET_HOR_WAIT_CNT(m->crtc_htotal - m->crtc_hsync_start) |
SET_VERT_WAIT_CNT(m->crtc_vtotal - m->crtc_vsync_start),
mxsfb->base + LCDC_VDCTRL3);
writel(SET_DOTCLK_H_VALID_DATA_CNT(m->hdisplay),
mxsfb->base + LCDC_VDCTRL4);
}
static void mxsfb_enable_controller(struct mxsfb_drm_private *mxsfb)
{
u32 reg;
if (mxsfb->clk_disp_axi)
clk_prepare_enable(mxsfb->clk_disp_axi);
clk_prepare_enable(mxsfb->clk);
/* Increase number of outstanding requests on all supported IPs */
if (mxsfb->devdata->has_ctrl2) {
reg = readl(mxsfb->base + LCDC_V4_CTRL2);
reg &= ~CTRL2_SET_OUTSTANDING_REQS_MASK;
reg |= CTRL2_SET_OUTSTANDING_REQS_16;
writel(reg, mxsfb->base + LCDC_V4_CTRL2);
}
/* If it was disabled, re-enable the mode again */
writel(CTRL_DOTCLK_MODE, mxsfb->base + LCDC_CTRL + REG_SET);
/* Enable the SYNC signals first, then the DMA engine */
reg = readl(mxsfb->base + LCDC_VDCTRL4);
reg |= VDCTRL4_SYNC_SIGNALS_ON;
writel(reg, mxsfb->base + LCDC_VDCTRL4);
/*
* Enable recovery on underflow.
*
* There is some sort of corner case behavior of the controller,
* which could rarely be triggered at least on i.MX6SX connected
* to 800x480 DPI panel and i.MX8MM connected to DPI->DSI->LVDS
* bridged 1920x1080 panel (and likely on other setups too), where
* the image on the panel shifts to the right and wraps around.
* This happens either when the controller is enabled on boot or
* even later during run time. The condition does not correct
* itself automatically, i.e. the display image remains shifted.
*
* It seems this problem is known and is due to sporadic underflows
* of the LCDIF FIFO. While the LCDIF IP does have underflow/overflow
* IRQs, neither of the IRQs trigger and neither IRQ status bit is
* asserted when this condition occurs.
*
* All known revisions of the LCDIF IP have CTRL1 RECOVER_ON_UNDERFLOW
* bit, which is described in the reference manual since i.MX23 as
* "
* Set this bit to enable the LCDIF block to recover in the next
* field/frame if there was an underflow in the current field/frame.
* "
* Enable this bit to mitigate the sporadic underflows.
*/
reg = readl(mxsfb->base + LCDC_CTRL1);
reg |= CTRL1_RECOVER_ON_UNDERFLOW;
writel(reg, mxsfb->base + LCDC_CTRL1);
writel(CTRL_RUN, mxsfb->base + LCDC_CTRL + REG_SET);
}
static void mxsfb_disable_controller(struct mxsfb_drm_private *mxsfb)
{
u32 reg;
/*
* Even if we disable the controller here, it will still continue
* until its FIFOs are running out of data
*/
writel(CTRL_DOTCLK_MODE, mxsfb->base + LCDC_CTRL + REG_CLR);
readl_poll_timeout(mxsfb->base + LCDC_CTRL, reg, !(reg & CTRL_RUN),
0, 1000);
reg = readl(mxsfb->base + LCDC_VDCTRL4);
reg &= ~VDCTRL4_SYNC_SIGNALS_ON;
writel(reg, mxsfb->base + LCDC_VDCTRL4);
clk_disable_unprepare(mxsfb->clk);
if (mxsfb->clk_disp_axi)
clk_disable_unprepare(mxsfb->clk_disp_axi);
}
/*
* Clear the bit and poll it cleared. This is usually called with
* a reset address and mask being either SFTRST(bit 31) or CLKGATE
* (bit 30).
*/
static int clear_poll_bit(void __iomem *addr, u32 mask)
{
u32 reg;
writel(mask, addr + REG_CLR);
return readl_poll_timeout(addr, reg, !(reg & mask), 0, RESET_TIMEOUT);
}
static int mxsfb_reset_block(struct mxsfb_drm_private *mxsfb)
{
int ret;
/*
* It seems, you can't re-program the controller if it is still
* running. This may lead to shifted pictures (FIFO issue?), so
* first stop the controller and drain its FIFOs.
*/
ret = clear_poll_bit(mxsfb->base + LCDC_CTRL, CTRL_SFTRST);
if (ret)
return ret;
writel(CTRL_CLKGATE, mxsfb->base + LCDC_CTRL + REG_CLR);
ret = clear_poll_bit(mxsfb->base + LCDC_CTRL, CTRL_SFTRST);
if (ret)
return ret;
ret = clear_poll_bit(mxsfb->base + LCDC_CTRL, CTRL_CLKGATE);
if (ret)
return ret;
/* Clear the FIFOs */
writel(CTRL1_FIFO_CLEAR, mxsfb->base + LCDC_CTRL1 + REG_SET);
readl(mxsfb->base + LCDC_CTRL1);
writel(CTRL1_FIFO_CLEAR, mxsfb->base + LCDC_CTRL1 + REG_CLR);
readl(mxsfb->base + LCDC_CTRL1);
if (mxsfb->devdata->has_overlay)
writel(0, mxsfb->base + LCDC_AS_CTRL);
return 0;
}
static void mxsfb_crtc_mode_set_nofb(struct mxsfb_drm_private *mxsfb,
struct drm_bridge_state *bridge_state,
const u32 bus_format)
{
struct drm_device *drm = mxsfb->crtc.dev;
struct drm_display_mode *m = &mxsfb->crtc.state->adjusted_mode;
u32 bus_flags = mxsfb->connector->display_info.bus_flags;
int err;
if (mxsfb->bridge && mxsfb->bridge->timings)
bus_flags = mxsfb->bridge->timings->input_bus_flags;
else if (bridge_state)
bus_flags = bridge_state->input_bus_cfg.flags;
DRM_DEV_DEBUG_DRIVER(drm->dev, "Pixel clock: %dkHz (actual: %dkHz)\n",
m->crtc_clock,
(int)(clk_get_rate(mxsfb->clk) / 1000));
DRM_DEV_DEBUG_DRIVER(drm->dev, "Connector bus_flags: 0x%08X\n",
bus_flags);
DRM_DEV_DEBUG_DRIVER(drm->dev, "Mode flags: 0x%08X\n", m->flags);
/* Mandatory eLCDIF reset as per the Reference Manual */
err = mxsfb_reset_block(mxsfb);
if (err)
return;
mxsfb_set_formats(mxsfb, bus_format);
clk_set_rate(mxsfb->clk, m->crtc_clock * 1000);
mxsfb_set_mode(mxsfb, bus_flags);
}
static int mxsfb_crtc_atomic_check(struct drm_crtc *crtc,
struct drm_atomic_state *state)
{
struct drm_crtc_state *crtc_state = drm_atomic_get_new_crtc_state(state,
crtc);
bool has_primary = crtc_state->plane_mask &
drm_plane_mask(crtc->primary);
/* The primary plane has to be enabled when the CRTC is active. */
if (crtc_state->active && !has_primary)
return -EINVAL;
/* TODO: Is this needed ? */
return drm_atomic_add_affected_planes(state, crtc);
}
static void mxsfb_crtc_atomic_flush(struct drm_crtc *crtc,
struct drm_atomic_state *state)
{
struct drm_pending_vblank_event *event;
event = crtc->state->event;
crtc->state->event = NULL;
if (!event)
return;
spin_lock_irq(&crtc->dev->event_lock);
if (drm_crtc_vblank_get(crtc) == 0)
drm_crtc_arm_vblank_event(crtc, event);
else
drm_crtc_send_vblank_event(crtc, event);
spin_unlock_irq(&crtc->dev->event_lock);
}
static void mxsfb_crtc_atomic_enable(struct drm_crtc *crtc,
struct drm_atomic_state *state)
{
struct mxsfb_drm_private *mxsfb = to_mxsfb_drm_private(crtc->dev);
struct drm_plane_state *new_pstate = drm_atomic_get_new_plane_state(state,
crtc->primary);
struct drm_bridge_state *bridge_state = NULL;
struct drm_device *drm = mxsfb->drm;
u32 bus_format = 0;
dma_addr_t dma_addr;
pm_runtime_get_sync(drm->dev);
mxsfb_enable_axi_clk(mxsfb);
drm_crtc_vblank_on(crtc);
/* If there is a bridge attached to the LCDIF, use its bus format */
if (mxsfb->bridge) {
bridge_state =
drm_atomic_get_new_bridge_state(state,
mxsfb->bridge);
if (!bridge_state)
bus_format = MEDIA_BUS_FMT_FIXED;
else
bus_format = bridge_state->input_bus_cfg.format;
if (bus_format == MEDIA_BUS_FMT_FIXED) {
dev_warn_once(drm->dev,
"Bridge does not provide bus format, assuming MEDIA_BUS_FMT_RGB888_1X24.\n"
"Please fix bridge driver by handling atomic_get_input_bus_fmts.\n");
bus_format = MEDIA_BUS_FMT_RGB888_1X24;
}
}
/* If there is no bridge, use bus format from connector */
if (!bus_format && mxsfb->connector->display_info.num_bus_formats)
bus_format = mxsfb->connector->display_info.bus_formats[0];
/* If all else fails, default to RGB888_1X24 */
if (!bus_format)
bus_format = MEDIA_BUS_FMT_RGB888_1X24;
mxsfb_crtc_mode_set_nofb(mxsfb, bridge_state, bus_format);
/* Write cur_buf as well to avoid an initial corrupt frame */
dma_addr = drm_fb_dma_get_gem_addr(new_pstate->fb, new_pstate, 0);
if (dma_addr) {
writel(dma_addr, mxsfb->base + mxsfb->devdata->cur_buf);
writel(dma_addr, mxsfb->base + mxsfb->devdata->next_buf);
}
mxsfb_enable_controller(mxsfb);
}
static void mxsfb_crtc_atomic_disable(struct drm_crtc *crtc,
struct drm_atomic_state *state)
{
struct mxsfb_drm_private *mxsfb = to_mxsfb_drm_private(crtc->dev);
struct drm_device *drm = mxsfb->drm;
struct drm_pending_vblank_event *event;
mxsfb_disable_controller(mxsfb);
spin_lock_irq(&drm->event_lock);
event = crtc->state->event;
if (event) {
crtc->state->event = NULL;
drm_crtc_send_vblank_event(crtc, event);
}
spin_unlock_irq(&drm->event_lock);
drm_crtc_vblank_off(crtc);
mxsfb_disable_axi_clk(mxsfb);
pm_runtime_put_sync(drm->dev);
}
static int mxsfb_crtc_enable_vblank(struct drm_crtc *crtc)
{
struct mxsfb_drm_private *mxsfb = to_mxsfb_drm_private(crtc->dev);
/* Clear and enable VBLANK IRQ */
writel(CTRL1_CUR_FRAME_DONE_IRQ, mxsfb->base + LCDC_CTRL1 + REG_CLR);
writel(CTRL1_CUR_FRAME_DONE_IRQ_EN, mxsfb->base + LCDC_CTRL1 + REG_SET);
return 0;
}
static void mxsfb_crtc_disable_vblank(struct drm_crtc *crtc)
{
struct mxsfb_drm_private *mxsfb = to_mxsfb_drm_private(crtc->dev);
/* Disable and clear VBLANK IRQ */
writel(CTRL1_CUR_FRAME_DONE_IRQ_EN, mxsfb->base + LCDC_CTRL1 + REG_CLR);
writel(CTRL1_CUR_FRAME_DONE_IRQ, mxsfb->base + LCDC_CTRL1 + REG_CLR);
}
static int mxsfb_crtc_set_crc_source(struct drm_crtc *crtc, const char *source)
{
struct mxsfb_drm_private *mxsfb;
if (!crtc)
return -ENODEV;
mxsfb = to_mxsfb_drm_private(crtc->dev);
if (source && strcmp(source, "auto") == 0)
mxsfb->crc_active = true;
else if (!source)
mxsfb->crc_active = false;
else
return -EINVAL;
return 0;
}
static int mxsfb_crtc_verify_crc_source(struct drm_crtc *crtc,
const char *source, size_t *values_cnt)
{
if (!crtc)
return -ENODEV;
if (source && strcmp(source, "auto") != 0) {
DRM_DEBUG_DRIVER("Unknown CRC source %s for %s\n",
source, crtc->name);
return -EINVAL;
}
*values_cnt = 1;
return 0;
}
static const struct drm_crtc_helper_funcs mxsfb_crtc_helper_funcs = {
.atomic_check = mxsfb_crtc_atomic_check,
.atomic_flush = mxsfb_crtc_atomic_flush,
.atomic_enable = mxsfb_crtc_atomic_enable,
.atomic_disable = mxsfb_crtc_atomic_disable,
};
static const struct drm_crtc_funcs mxsfb_crtc_funcs = {
.reset = drm_atomic_helper_crtc_reset,
.destroy = drm_crtc_cleanup,
.set_config = drm_atomic_helper_set_config,
.page_flip = drm_atomic_helper_page_flip,
.atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state,
.atomic_destroy_state = drm_atomic_helper_crtc_destroy_state,
.enable_vblank = mxsfb_crtc_enable_vblank,
.disable_vblank = mxsfb_crtc_disable_vblank,
};
static const struct drm_crtc_funcs mxsfb_crtc_with_crc_funcs = {
.reset = drm_atomic_helper_crtc_reset,
.destroy = drm_crtc_cleanup,
.set_config = drm_atomic_helper_set_config,
.page_flip = drm_atomic_helper_page_flip,
.atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state,
.atomic_destroy_state = drm_atomic_helper_crtc_destroy_state,
.enable_vblank = mxsfb_crtc_enable_vblank,
.disable_vblank = mxsfb_crtc_disable_vblank,
.set_crc_source = mxsfb_crtc_set_crc_source,
.verify_crc_source = mxsfb_crtc_verify_crc_source,
};
/* -----------------------------------------------------------------------------
* Encoder
*/
static const struct drm_encoder_funcs mxsfb_encoder_funcs = {
.destroy = drm_encoder_cleanup,
};
/* -----------------------------------------------------------------------------
* Planes
*/
static int mxsfb_plane_atomic_check(struct drm_plane *plane,
struct drm_atomic_state *state)
{
struct drm_plane_state *plane_state = drm_atomic_get_new_plane_state(state,
plane);
struct mxsfb_drm_private *mxsfb = to_mxsfb_drm_private(plane->dev);
struct drm_crtc_state *crtc_state;
crtc_state = drm_atomic_get_new_crtc_state(state,
&mxsfb->crtc);
return drm_atomic_helper_check_plane_state(plane_state, crtc_state,
DRM_PLANE_NO_SCALING,
DRM_PLANE_NO_SCALING,
false, true);
}
static void mxsfb_plane_primary_atomic_update(struct drm_plane *plane,
struct drm_atomic_state *state)
{
struct mxsfb_drm_private *mxsfb = to_mxsfb_drm_private(plane->dev);
struct drm_plane_state *new_pstate = drm_atomic_get_new_plane_state(state,
plane);
dma_addr_t dma_addr;
dma_addr = drm_fb_dma_get_gem_addr(new_pstate->fb, new_pstate, 0);
if (dma_addr)
writel(dma_addr, mxsfb->base + mxsfb->devdata->next_buf);
}
static void mxsfb_plane_overlay_atomic_update(struct drm_plane *plane,
struct drm_atomic_state *state)
{
struct drm_plane_state *old_pstate = drm_atomic_get_old_plane_state(state,
plane);
struct mxsfb_drm_private *mxsfb = to_mxsfb_drm_private(plane->dev);
struct drm_plane_state *new_pstate = drm_atomic_get_new_plane_state(state,
plane);
dma_addr_t dma_addr;
u32 ctrl;
dma_addr = drm_fb_dma_get_gem_addr(new_pstate->fb, new_pstate, 0);
if (!dma_addr) {
writel(0, mxsfb->base + LCDC_AS_CTRL);
return;
}
/*
* HACK: The hardware seems to output 64 bytes of data of unknown
* origin, and then to proceed with the framebuffer. Until the reason
* is understood, live with the 16 initial invalid pixels on the first
* line and start 64 bytes within the framebuffer.
*/
dma_addr += 64;
writel(dma_addr, mxsfb->base + LCDC_AS_NEXT_BUF);
/*
* If the plane was previously disabled, write LCDC_AS_BUF as well to
* provide the first buffer.
*/
if (!old_pstate->fb)
writel(dma_addr, mxsfb->base + LCDC_AS_BUF);
ctrl = AS_CTRL_AS_ENABLE | AS_CTRL_ALPHA(255);
switch (new_pstate->fb->format->format) {
case DRM_FORMAT_XRGB4444:
ctrl |= AS_CTRL_FORMAT_RGB444 | AS_CTRL_ALPHA_CTRL_OVERRIDE;
break;
case DRM_FORMAT_ARGB4444:
ctrl |= AS_CTRL_FORMAT_ARGB4444 | AS_CTRL_ALPHA_CTRL_EMBEDDED;
break;
case DRM_FORMAT_XRGB1555:
ctrl |= AS_CTRL_FORMAT_RGB555 | AS_CTRL_ALPHA_CTRL_OVERRIDE;
break;
case DRM_FORMAT_ARGB1555:
ctrl |= AS_CTRL_FORMAT_ARGB1555 | AS_CTRL_ALPHA_CTRL_EMBEDDED;
break;
case DRM_FORMAT_RGB565:
ctrl |= AS_CTRL_FORMAT_RGB565 | AS_CTRL_ALPHA_CTRL_OVERRIDE;
break;
case DRM_FORMAT_XRGB8888:
ctrl |= AS_CTRL_FORMAT_RGB888 | AS_CTRL_ALPHA_CTRL_OVERRIDE;
break;
case DRM_FORMAT_ARGB8888:
ctrl |= AS_CTRL_FORMAT_ARGB8888 | AS_CTRL_ALPHA_CTRL_EMBEDDED;
break;
}
writel(ctrl, mxsfb->base + LCDC_AS_CTRL);
}
static void mxsfb_plane_overlay_atomic_disable(struct drm_plane *plane,
struct drm_atomic_state *state)
{
struct mxsfb_drm_private *mxsfb = to_mxsfb_drm_private(plane->dev);
writel(0, mxsfb->base + LCDC_AS_CTRL);
}
static bool mxsfb_format_mod_supported(struct drm_plane *plane,
uint32_t format,
uint64_t modifier)
{
return modifier == DRM_FORMAT_MOD_LINEAR;
}
static const struct drm_plane_helper_funcs mxsfb_plane_primary_helper_funcs = {
.atomic_check = mxsfb_plane_atomic_check,
.atomic_update = mxsfb_plane_primary_atomic_update,
};
static const struct drm_plane_helper_funcs mxsfb_plane_overlay_helper_funcs = {
.atomic_check = mxsfb_plane_atomic_check,
.atomic_update = mxsfb_plane_overlay_atomic_update,
.atomic_disable = mxsfb_plane_overlay_atomic_disable,
};
static const struct drm_plane_funcs mxsfb_plane_funcs = {
.format_mod_supported = mxsfb_format_mod_supported,
.update_plane = drm_atomic_helper_update_plane,
.disable_plane = drm_atomic_helper_disable_plane,
.destroy = drm_plane_cleanup,
.reset = drm_atomic_helper_plane_reset,
.atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state,
.atomic_destroy_state = drm_atomic_helper_plane_destroy_state,
};
static const uint32_t mxsfb_primary_plane_formats[] = {
DRM_FORMAT_RGB565,
DRM_FORMAT_XRGB8888,
};
static const uint32_t mxsfb_overlay_plane_formats[] = {
DRM_FORMAT_XRGB4444,
DRM_FORMAT_ARGB4444,
DRM_FORMAT_XRGB1555,
DRM_FORMAT_ARGB1555,
DRM_FORMAT_RGB565,
DRM_FORMAT_XRGB8888,
DRM_FORMAT_ARGB8888,
};
static const uint64_t mxsfb_modifiers[] = {
DRM_FORMAT_MOD_LINEAR,
DRM_FORMAT_MOD_INVALID
};
/* -----------------------------------------------------------------------------
* Initialization
*/
int mxsfb_kms_init(struct mxsfb_drm_private *mxsfb)
{
struct drm_encoder *encoder = &mxsfb->encoder;
struct drm_crtc *crtc = &mxsfb->crtc;
int ret;
drm_plane_helper_add(&mxsfb->planes.primary,
&mxsfb_plane_primary_helper_funcs);
ret = drm_universal_plane_init(mxsfb->drm, &mxsfb->planes.primary, 1,
&mxsfb_plane_funcs,
mxsfb_primary_plane_formats,
ARRAY_SIZE(mxsfb_primary_plane_formats),
mxsfb_modifiers, DRM_PLANE_TYPE_PRIMARY,
NULL);
if (ret)
return ret;
if (mxsfb->devdata->has_overlay) {
drm_plane_helper_add(&mxsfb->planes.overlay,
&mxsfb_plane_overlay_helper_funcs);
ret = drm_universal_plane_init(mxsfb->drm,
&mxsfb->planes.overlay, 1,
&mxsfb_plane_funcs,
mxsfb_overlay_plane_formats,
ARRAY_SIZE(mxsfb_overlay_plane_formats),
mxsfb_modifiers, DRM_PLANE_TYPE_OVERLAY,
NULL);
if (ret)
return ret;
}
drm_crtc_helper_add(crtc, &mxsfb_crtc_helper_funcs);
if (mxsfb->devdata->has_crc32) {
ret = drm_crtc_init_with_planes(mxsfb->drm, crtc,
&mxsfb->planes.primary, NULL,
&mxsfb_crtc_with_crc_funcs,
NULL);
} else {
ret = drm_crtc_init_with_planes(mxsfb->drm, crtc,
&mxsfb->planes.primary, NULL,
&mxsfb_crtc_funcs, NULL);
}
if (ret)
return ret;
encoder->possible_crtcs = drm_crtc_mask(crtc);
return drm_encoder_init(mxsfb->drm, encoder, &mxsfb_encoder_funcs,
DRM_MODE_ENCODER_NONE, NULL);
}
Codebase Browser
linux