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linux/drivers/gpu/drm/armada/armada_crtc.c

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/*
* Copyright (C) 2012 Russell King
* Rewritten from the dovefb driver, and Armada510 manuals.
*
* 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.
*/
#include <linux/clk.h>
#include <drm/drmP.h>
#include <drm/drm_crtc_helper.h>
#include "armada_crtc.h"
#include "armada_drm.h"
#include "armada_fb.h"
#include "armada_gem.h"
#include "armada_hw.h"
struct armada_frame_work {
struct drm_pending_vblank_event *event;
struct armada_regs regs[4];
struct drm_framebuffer *old_fb;
};
enum csc_mode {
CSC_AUTO = 0,
CSC_YUV_CCIR601 = 1,
CSC_YUV_CCIR709 = 2,
CSC_RGB_COMPUTER = 1,
CSC_RGB_STUDIO = 2,
};
/*
* A note about interlacing. Let's consider HDMI 1920x1080i.
* The timing parameters we have from X are:
* Hact HsyA HsyI Htot Vact VsyA VsyI Vtot
* 1920 2448 2492 2640 1080 1084 1094 1125
* Which get translated to:
* Hact HsyA HsyI Htot Vact VsyA VsyI Vtot
* 1920 2448 2492 2640 540 542 547 562
*
* This is how it is defined by CEA-861-D - line and pixel numbers are
* referenced to the rising edge of VSYNC and HSYNC. Total clocks per
* line: 2640. The odd frame, the first active line is at line 21, and
* the even frame, the first active line is 584.
*
* LN: 560 561 562 563 567 568 569
* DE: ~~~|____________________________//__________________________
* HSYNC: ____|~|_____|~|_____|~|_____|~|_//__|~|_____|~|_____|~|_____
* VSYNC: _________________________|~~~~~~//~~~~~~~~~~~~~~~|__________
* 22 blanking lines. VSYNC at 1320 (referenced to the HSYNC rising edge).
*
* LN: 1123 1124 1125 1 5 6 7
* DE: ~~~|____________________________//__________________________
* HSYNC: ____|~|_____|~|_____|~|_____|~|_//__|~|_____|~|_____|~|_____
* VSYNC: ____________________|~~~~~~~~~~~//~~~~~~~~~~|_______________
* 23 blanking lines
*
* The Armada LCD Controller line and pixel numbers are, like X timings,
* referenced to the top left of the active frame.
*
* So, translating these to our LCD controller:
* Odd frame, 563 total lines, VSYNC at line 543-548, pixel 1128.
* Even frame, 562 total lines, VSYNC at line 542-547, pixel 2448.
* Note: Vsync front porch remains constant!
*
* if (odd_frame) {
* vtotal = mode->crtc_vtotal + 1;
* vbackporch = mode->crtc_vsync_start - mode->crtc_vdisplay + 1;
* vhorizpos = mode->crtc_hsync_start - mode->crtc_htotal / 2
* } else {
* vtotal = mode->crtc_vtotal;
* vbackporch = mode->crtc_vsync_start - mode->crtc_vdisplay;
* vhorizpos = mode->crtc_hsync_start;
* }
* vfrontporch = mode->crtc_vtotal - mode->crtc_vsync_end;
*
* So, we need to reprogram these registers on each vsync event:
* LCD_SPU_V_PORCH, LCD_SPU_ADV_REG, LCD_SPUT_V_H_TOTAL
*
* Note: we do not use the frame done interrupts because these appear
* to happen too early, and lead to jitter on the display (presumably
* they occur at the end of the last active line, before the vsync back
* porch, which we're reprogramming.)
*/
void
armada_drm_crtc_update_regs(struct armada_crtc *dcrtc, struct armada_regs *regs)
{
while (regs->offset != ~0) {
void __iomem *reg = dcrtc->base + regs->offset;
uint32_t val;
val = regs->mask;
if (val != 0)
val &= readl_relaxed(reg);
writel_relaxed(val | regs->val, reg);
++regs;
}
}
#define dpms_blanked(dpms) ((dpms) != DRM_MODE_DPMS_ON)
static void armada_drm_crtc_update(struct armada_crtc *dcrtc)
{
uint32_t dumb_ctrl;
dumb_ctrl = dcrtc->cfg_dumb_ctrl;
if (!dpms_blanked(dcrtc->dpms))
dumb_ctrl |= CFG_DUMB_ENA;
/*
* When the dumb interface isn't in DUMB24_RGB888_0 mode, it might
* be using SPI or GPIO. If we set this to DUMB_BLANK, we will
* force LCD_D[23:0] to output blank color, overriding the GPIO or
* SPI usage. So leave it as-is unless in DUMB24_RGB888_0 mode.
*/
if (dpms_blanked(dcrtc->dpms) &&
(dumb_ctrl & DUMB_MASK) == DUMB24_RGB888_0) {
dumb_ctrl &= ~DUMB_MASK;
dumb_ctrl |= DUMB_BLANK;
}
/*
* The documentation doesn't indicate what the normal state of
* the sync signals are. Sebastian Hesselbart kindly probed
* these signals on his board to determine their state.
*
* The non-inverted state of the sync signals is active high.
* Setting these bits makes the appropriate signal active low.
*/
if (dcrtc->crtc.mode.flags & DRM_MODE_FLAG_NCSYNC)
dumb_ctrl |= CFG_INV_CSYNC;
if (dcrtc->crtc.mode.flags & DRM_MODE_FLAG_NHSYNC)
dumb_ctrl |= CFG_INV_HSYNC;
if (dcrtc->crtc.mode.flags & DRM_MODE_FLAG_NVSYNC)
dumb_ctrl |= CFG_INV_VSYNC;
if (dcrtc->dumb_ctrl != dumb_ctrl) {
dcrtc->dumb_ctrl = dumb_ctrl;
writel_relaxed(dumb_ctrl, dcrtc->base + LCD_SPU_DUMB_CTRL);
}
}
static unsigned armada_drm_crtc_calc_fb(struct drm_framebuffer *fb,
int x, int y, struct armada_regs *regs, bool interlaced)
{
struct armada_gem_object *obj = drm_fb_obj(fb);
unsigned pitch = fb->pitches[0];
unsigned offset = y * pitch + x * fb->bits_per_pixel / 8;
uint32_t addr_odd, addr_even;
unsigned i = 0;
DRM_DEBUG_DRIVER("pitch %u x %d y %d bpp %d\n",
pitch, x, y, fb->bits_per_pixel);
addr_odd = addr_even = obj->dev_addr + offset;
if (interlaced) {
addr_even += pitch;
pitch *= 2;
}
/* write offset, base, and pitch */
armada_reg_queue_set(regs, i, addr_odd, LCD_CFG_GRA_START_ADDR0);
armada_reg_queue_set(regs, i, addr_even, LCD_CFG_GRA_START_ADDR1);
armada_reg_queue_mod(regs, i, pitch, 0xffff, LCD_CFG_GRA_PITCH);
return i;
}
static int armada_drm_crtc_queue_frame_work(struct armada_crtc *dcrtc,
struct armada_frame_work *work)
{
struct drm_device *dev = dcrtc->crtc.dev;
unsigned long flags;
int ret;
ret = drm_vblank_get(dev, dcrtc->num);
if (ret) {
DRM_ERROR("failed to acquire vblank counter\n");
return ret;
}
spin_lock_irqsave(&dev->event_lock, flags);
if (!dcrtc->frame_work)
dcrtc->frame_work = work;
else
ret = -EBUSY;
spin_unlock_irqrestore(&dev->event_lock, flags);
if (ret)
drm_vblank_put(dev, dcrtc->num);
return ret;
}
static void armada_drm_crtc_complete_frame_work(struct armada_crtc *dcrtc)
{
struct drm_device *dev = dcrtc->crtc.dev;
struct armada_frame_work *work = dcrtc->frame_work;
dcrtc->frame_work = NULL;
armada_drm_crtc_update_regs(dcrtc, work->regs);
if (work->event)
drm_send_vblank_event(dev, dcrtc->num, work->event);
drm_vblank_put(dev, dcrtc->num);
/* Finally, queue the process-half of the cleanup. */
__armada_drm_queue_unref_work(dcrtc->crtc.dev, work->old_fb);
kfree(work);
}
static void armada_drm_crtc_finish_fb(struct armada_crtc *dcrtc,
struct drm_framebuffer *fb, bool force)
{
struct armada_frame_work *work;
if (!fb)
return;
if (force) {
/* Display is disabled, so just drop the old fb */
drm_framebuffer_unreference(fb);
return;
}
work = kmalloc(sizeof(*work), GFP_KERNEL);
if (work) {
int i = 0;
work->event = NULL;
work->old_fb = fb;
armada_reg_queue_end(work->regs, i);
if (armada_drm_crtc_queue_frame_work(dcrtc, work) == 0)
return;
kfree(work);
}
/*
* Oops - just drop the reference immediately and hope for
* the best. The worst that will happen is the buffer gets
* reused before it has finished being displayed.
*/
drm_framebuffer_unreference(fb);
}
static void armada_drm_vblank_off(struct armada_crtc *dcrtc)
{
struct drm_device *dev = dcrtc->crtc.dev;
/*
* Tell the DRM core that vblank IRQs aren't going to happen for
* a while. This cleans up any pending vblank events for us.
*/
drm_vblank_off(dev, dcrtc->num);
/* Handle any pending flip event. */
spin_lock_irq(&dev->event_lock);
if (dcrtc->frame_work)
armada_drm_crtc_complete_frame_work(dcrtc);
spin_unlock_irq(&dev->event_lock);
}
void armada_drm_crtc_gamma_set(struct drm_crtc *crtc, u16 r, u16 g, u16 b,
int idx)
{
}
void armada_drm_crtc_gamma_get(struct drm_crtc *crtc, u16 *r, u16 *g, u16 *b,
int idx)
{
}
/* The mode_config.mutex will be held for this call */
static void armada_drm_crtc_dpms(struct drm_crtc *crtc, int dpms)
{
struct armada_crtc *dcrtc = drm_to_armada_crtc(crtc);
if (dcrtc->dpms != dpms) {
dcrtc->dpms = dpms;
armada_drm_crtc_update(dcrtc);
if (dpms_blanked(dpms))
armada_drm_vblank_off(dcrtc);
}
}
/*
* Prepare for a mode set. Turn off overlay to ensure that we don't end
* up with the overlay size being bigger than the active screen size.
* We rely upon X refreshing this state after the mode set has completed.
*
* The mode_config.mutex will be held for this call
*/
static void armada_drm_crtc_prepare(struct drm_crtc *crtc)
{
struct armada_crtc *dcrtc = drm_to_armada_crtc(crtc);
struct drm_plane *plane;
/*
* If we have an overlay plane associated with this CRTC, disable
* it before the modeset to avoid its coordinates being outside
* the new mode parameters. DRM doesn't provide help with this.
*/
plane = dcrtc->plane;
if (plane) {
struct drm_framebuffer *fb = plane->fb;
plane->funcs->disable_plane(plane);
plane->fb = NULL;
plane->crtc = NULL;
drm_framebuffer_unreference(fb);
}
}
/* The mode_config.mutex will be held for this call */
static void armada_drm_crtc_commit(struct drm_crtc *crtc)
{
struct armada_crtc *dcrtc = drm_to_armada_crtc(crtc);
if (dcrtc->dpms != DRM_MODE_DPMS_ON) {
dcrtc->dpms = DRM_MODE_DPMS_ON;
armada_drm_crtc_update(dcrtc);
}
}
/* The mode_config.mutex will be held for this call */
static bool armada_drm_crtc_mode_fixup(struct drm_crtc *crtc,
const struct drm_display_mode *mode, struct drm_display_mode *adj)
{
struct armada_private *priv = crtc->dev->dev_private;
struct armada_crtc *dcrtc = drm_to_armada_crtc(crtc);
int ret;
/* We can't do interlaced modes if we don't have the SPU_ADV_REG */
if (!priv->variant->has_spu_adv_reg &&
adj->flags & DRM_MODE_FLAG_INTERLACE)
return false;
/* Check whether the display mode is possible */
ret = priv->variant->crtc_compute_clock(dcrtc, adj, NULL);
if (ret)
return false;
return true;
}
static void armada_drm_crtc_irq(struct armada_crtc *dcrtc, u32 stat)
{
struct armada_vbl_event *e, *n;
void __iomem *base = dcrtc->base;
if (stat & DMA_FF_UNDERFLOW)
DRM_ERROR("video underflow on crtc %u\n", dcrtc->num);
if (stat & GRA_FF_UNDERFLOW)
DRM_ERROR("graphics underflow on crtc %u\n", dcrtc->num);
if (stat & VSYNC_IRQ)
drm_handle_vblank(dcrtc->crtc.dev, dcrtc->num);
spin_lock(&dcrtc->irq_lock);
list_for_each_entry_safe(e, n, &dcrtc->vbl_list, node) {
list_del_init(&e->node);
drm_vblank_put(dcrtc->crtc.dev, dcrtc->num);
e->fn(dcrtc, e->data);
}
if (stat & GRA_FRAME_IRQ && dcrtc->interlaced) {
int i = stat & GRA_FRAME_IRQ0 ? 0 : 1;
uint32_t val;
writel_relaxed(dcrtc->v[i].spu_v_porch, base + LCD_SPU_V_PORCH);
writel_relaxed(dcrtc->v[i].spu_v_h_total,
base + LCD_SPUT_V_H_TOTAL);
val = readl_relaxed(base + LCD_SPU_ADV_REG);
val &= ~(ADV_VSYNC_L_OFF | ADV_VSYNC_H_OFF | ADV_VSYNCOFFEN);
val |= dcrtc->v[i].spu_adv_reg;
writel_relaxed(val, base + LCD_SPU_ADV_REG);
}
if (stat & DUMB_FRAMEDONE && dcrtc->cursor_update) {
writel_relaxed(dcrtc->cursor_hw_pos,
base + LCD_SPU_HWC_OVSA_HPXL_VLN);
writel_relaxed(dcrtc->cursor_hw_sz,
base + LCD_SPU_HWC_HPXL_VLN);
armada_updatel(CFG_HWC_ENA,
CFG_HWC_ENA | CFG_HWC_1BITMOD | CFG_HWC_1BITENA,
base + LCD_SPU_DMA_CTRL0);
dcrtc->cursor_update = false;
armada_drm_crtc_disable_irq(dcrtc, DUMB_FRAMEDONE_ENA);
}
spin_unlock(&dcrtc->irq_lock);
if (stat & GRA_FRAME_IRQ) {
struct drm_device *dev = dcrtc->crtc.dev;
spin_lock(&dev->event_lock);
if (dcrtc->frame_work)
armada_drm_crtc_complete_frame_work(dcrtc);
spin_unlock(&dev->event_lock);
wake_up(&dcrtc->frame_wait);
}
}
static irqreturn_t armada_drm_irq(int irq, void *arg)
{
struct armada_crtc *dcrtc = arg;
u32 v, stat = readl_relaxed(dcrtc->base + LCD_SPU_IRQ_ISR);
/*
* This is rediculous - rather than writing bits to clear, we
* have to set the actual status register value. This is racy.
*/
writel_relaxed(0, dcrtc->base + LCD_SPU_IRQ_ISR);
/* Mask out those interrupts we haven't enabled */
v = stat & dcrtc->irq_ena;
if (v & (VSYNC_IRQ|GRA_FRAME_IRQ|DUMB_FRAMEDONE)) {
armada_drm_crtc_irq(dcrtc, stat);
return IRQ_HANDLED;
}
return IRQ_NONE;
}
/* These are locked by dev->vbl_lock */
void armada_drm_crtc_disable_irq(struct armada_crtc *dcrtc, u32 mask)
{
if (dcrtc->irq_ena & mask) {
dcrtc->irq_ena &= ~mask;
writel(dcrtc->irq_ena, dcrtc->base + LCD_SPU_IRQ_ENA);
}
}
void armada_drm_crtc_enable_irq(struct armada_crtc *dcrtc, u32 mask)
{
if ((dcrtc->irq_ena & mask) != mask) {
dcrtc->irq_ena |= mask;
writel(dcrtc->irq_ena, dcrtc->base + LCD_SPU_IRQ_ENA);
if (readl_relaxed(dcrtc->base + LCD_SPU_IRQ_ISR) & mask)
writel(0, dcrtc->base + LCD_SPU_IRQ_ISR);
}
}
static uint32_t armada_drm_crtc_calculate_csc(struct armada_crtc *dcrtc)
{
struct drm_display_mode *adj = &dcrtc->crtc.mode;
uint32_t val = 0;
if (dcrtc->csc_yuv_mode == CSC_YUV_CCIR709)
val |= CFG_CSC_YUV_CCIR709;
if (dcrtc->csc_rgb_mode == CSC_RGB_STUDIO)
val |= CFG_CSC_RGB_STUDIO;
/*
* In auto mode, set the colorimetry, based upon the HDMI spec.
* 1280x720p, 1920x1080p and 1920x1080i use ITU709, others use
* ITU601. It may be more appropriate to set this depending on
* the source - but what if the graphic frame is YUV and the
* video frame is RGB?
*/
if ((adj->hdisplay == 1280 && adj->vdisplay == 720 &&
!(adj->flags & DRM_MODE_FLAG_INTERLACE)) ||
(adj->hdisplay == 1920 && adj->vdisplay == 1080)) {
if (dcrtc->csc_yuv_mode == CSC_AUTO)
val |= CFG_CSC_YUV_CCIR709;
}
/*
* We assume we're connected to a TV-like device, so the YUV->RGB
* conversion should produce a limited range. We should set this
* depending on the connectors attached to this CRTC, and what
* kind of device they report being connected.
*/
if (dcrtc->csc_rgb_mode == CSC_AUTO)
val |= CFG_CSC_RGB_STUDIO;
return val;
}
/* The mode_config.mutex will be held for this call */
static int armada_drm_crtc_mode_set(struct drm_crtc *crtc,
struct drm_display_mode *mode, struct drm_display_mode *adj,
int x, int y, struct drm_framebuffer *old_fb)
{
struct armada_private *priv = crtc->dev->dev_private;
struct armada_crtc *dcrtc = drm_to_armada_crtc(crtc);
struct armada_regs regs[17];
uint32_t lm, rm, tm, bm, val, sclk;
unsigned long flags;
unsigned i;
bool interlaced;
drm_framebuffer_reference(crtc->primary->fb);
interlaced = !!(adj->flags & DRM_MODE_FLAG_INTERLACE);
i = armada_drm_crtc_calc_fb(dcrtc->crtc.primary->fb,
x, y, regs, interlaced);
rm = adj->crtc_hsync_start - adj->crtc_hdisplay;
lm = adj->crtc_htotal - adj->crtc_hsync_end;
bm = adj->crtc_vsync_start - adj->crtc_vdisplay;
tm = adj->crtc_vtotal - adj->crtc_vsync_end;
DRM_DEBUG_DRIVER("H: %d %d %d %d lm %d rm %d\n",
adj->crtc_hdisplay,
adj->crtc_hsync_start,
adj->crtc_hsync_end,
adj->crtc_htotal, lm, rm);
DRM_DEBUG_DRIVER("V: %d %d %d %d tm %d bm %d\n",
adj->crtc_vdisplay,
adj->crtc_vsync_start,
adj->crtc_vsync_end,
adj->crtc_vtotal, tm, bm);
/* Wait for pending flips to complete */
wait_event(dcrtc->frame_wait, !dcrtc->frame_work);
drm_vblank_pre_modeset(crtc->dev, dcrtc->num);
crtc->mode = *adj;
val = dcrtc->dumb_ctrl & ~CFG_DUMB_ENA;
if (val != dcrtc->dumb_ctrl) {
dcrtc->dumb_ctrl = val;
writel_relaxed(val, dcrtc->base + LCD_SPU_DUMB_CTRL);
}
/* Now compute the divider for real */
priv->variant->crtc_compute_clock(dcrtc, adj, &sclk);
/* Ensure graphic fifo is enabled */
armada_reg_queue_mod(regs, i, 0, CFG_PDWN64x66, LCD_SPU_SRAM_PARA1);
armada_reg_queue_set(regs, i, sclk, LCD_CFG_SCLK_DIV);
if (interlaced ^ dcrtc->interlaced) {
if (adj->flags & DRM_MODE_FLAG_INTERLACE)
drm_vblank_get(dcrtc->crtc.dev, dcrtc->num);
else
drm_vblank_put(dcrtc->crtc.dev, dcrtc->num);
dcrtc->interlaced = interlaced;
}
spin_lock_irqsave(&dcrtc->irq_lock, flags);
/* Even interlaced/progressive frame */
dcrtc->v[1].spu_v_h_total = adj->crtc_vtotal << 16 |
adj->crtc_htotal;
dcrtc->v[1].spu_v_porch = tm << 16 | bm;
val = adj->crtc_hsync_start;
dcrtc->v[1].spu_adv_reg = val << 20 | val | ADV_VSYNCOFFEN |
priv->variant->spu_adv_reg;
if (interlaced) {
/* Odd interlaced frame */
dcrtc->v[0].spu_v_h_total = dcrtc->v[1].spu_v_h_total +
(1 << 16);
dcrtc->v[0].spu_v_porch = dcrtc->v[1].spu_v_porch + 1;
val = adj->crtc_hsync_start - adj->crtc_htotal / 2;
dcrtc->v[0].spu_adv_reg = val << 20 | val | ADV_VSYNCOFFEN |
priv->variant->spu_adv_reg;
} else {
dcrtc->v[0] = dcrtc->v[1];
}
val = adj->crtc_vdisplay << 16 | adj->crtc_hdisplay;
armada_reg_queue_set(regs, i, val, LCD_SPU_V_H_ACTIVE);
armada_reg_queue_set(regs, i, val, LCD_SPU_GRA_HPXL_VLN);
armada_reg_queue_set(regs, i, val, LCD_SPU_GZM_HPXL_VLN);
armada_reg_queue_set(regs, i, (lm << 16) | rm, LCD_SPU_H_PORCH);
armada_reg_queue_set(regs, i, dcrtc->v[0].spu_v_porch, LCD_SPU_V_PORCH);
armada_reg_queue_set(regs, i, dcrtc->v[0].spu_v_h_total,
LCD_SPUT_V_H_TOTAL);
if (priv->variant->has_spu_adv_reg) {
armada_reg_queue_mod(regs, i, dcrtc->v[0].spu_adv_reg,
ADV_VSYNC_L_OFF | ADV_VSYNC_H_OFF |
ADV_VSYNCOFFEN, LCD_SPU_ADV_REG);
}
val = CFG_GRA_ENA | CFG_GRA_HSMOOTH;
val |= CFG_GRA_FMT(drm_fb_to_armada_fb(dcrtc->crtc.primary->fb)->fmt);
val |= CFG_GRA_MOD(drm_fb_to_armada_fb(dcrtc->crtc.primary->fb)->mod);
if (drm_fb_to_armada_fb(dcrtc->crtc.primary->fb)->fmt > CFG_420)
val |= CFG_PALETTE_ENA;
if (interlaced)
val |= CFG_GRA_FTOGGLE;
armada_reg_queue_mod(regs, i, val, CFG_GRAFORMAT |
CFG_GRA_MOD(CFG_SWAPRB | CFG_SWAPUV |
CFG_SWAPYU | CFG_YUV2RGB) |
CFG_PALETTE_ENA | CFG_GRA_FTOGGLE,
LCD_SPU_DMA_CTRL0);
val = adj->flags & DRM_MODE_FLAG_NVSYNC ? CFG_VSYNC_INV : 0;
armada_reg_queue_mod(regs, i, val, CFG_VSYNC_INV, LCD_SPU_DMA_CTRL1);
val = dcrtc->spu_iopad_ctrl | armada_drm_crtc_calculate_csc(dcrtc);
armada_reg_queue_set(regs, i, val, LCD_SPU_IOPAD_CONTROL);
armada_reg_queue_end(regs, i);
armada_drm_crtc_update_regs(dcrtc, regs);
spin_unlock_irqrestore(&dcrtc->irq_lock, flags);
armada_drm_crtc_update(dcrtc);
drm_vblank_post_modeset(crtc->dev, dcrtc->num);
armada_drm_crtc_finish_fb(dcrtc, old_fb, dpms_blanked(dcrtc->dpms));
return 0;
}
/* The mode_config.mutex will be held for this call */
static int armada_drm_crtc_mode_set_base(struct drm_crtc *crtc, int x, int y,
struct drm_framebuffer *old_fb)
{
struct armada_crtc *dcrtc = drm_to_armada_crtc(crtc);
struct armada_regs regs[4];
unsigned i;
i = armada_drm_crtc_calc_fb(crtc->primary->fb, crtc->x, crtc->y, regs,
dcrtc->interlaced);
armada_reg_queue_end(regs, i);
/* Wait for pending flips to complete */
wait_event(dcrtc->frame_wait, !dcrtc->frame_work);
/* Take a reference to the new fb as we're using it */
drm_framebuffer_reference(crtc->primary->fb);
/* Update the base in the CRTC */
armada_drm_crtc_update_regs(dcrtc, regs);
/* Drop our previously held reference */
armada_drm_crtc_finish_fb(dcrtc, old_fb, dpms_blanked(dcrtc->dpms));
return 0;
}
static void armada_drm_crtc_load_lut(struct drm_crtc *crtc)
{
}
/* The mode_config.mutex will be held for this call */
static void armada_drm_crtc_disable(struct drm_crtc *crtc)
{
struct armada_crtc *dcrtc = drm_to_armada_crtc(crtc);
armada_drm_crtc_dpms(crtc, DRM_MODE_DPMS_OFF);
armada_drm_crtc_finish_fb(dcrtc, crtc->primary->fb, true);
/* Power down most RAMs and FIFOs */
writel_relaxed(CFG_PDWN256x32 | CFG_PDWN256x24 | CFG_PDWN256x8 |
CFG_PDWN32x32 | CFG_PDWN16x66 | CFG_PDWN32x66 |
CFG_PDWN64x66, dcrtc->base + LCD_SPU_SRAM_PARA1);
}
static const struct drm_crtc_helper_funcs armada_crtc_helper_funcs = {
.dpms = armada_drm_crtc_dpms,
.prepare = armada_drm_crtc_prepare,
.commit = armada_drm_crtc_commit,
.mode_fixup = armada_drm_crtc_mode_fixup,
.mode_set = armada_drm_crtc_mode_set,
.mode_set_base = armada_drm_crtc_mode_set_base,
.load_lut = armada_drm_crtc_load_lut,
.disable = armada_drm_crtc_disable,
};
static void armada_load_cursor_argb(void __iomem *base, uint32_t *pix,
unsigned stride, unsigned width, unsigned height)
{
uint32_t addr;
unsigned y;
addr = SRAM_HWC32_RAM1;
for (y = 0; y < height; y++) {
uint32_t *p = &pix[y * stride];
unsigned x;
for (x = 0; x < width; x++, p++) {
uint32_t val = *p;
val = (val & 0xff00ff00) |
(val & 0x000000ff) << 16 |
(val & 0x00ff0000) >> 16;
writel_relaxed(val,
base + LCD_SPU_SRAM_WRDAT);
writel_relaxed(addr | SRAM_WRITE,
base + LCD_SPU_SRAM_CTRL);
readl_relaxed(base + LCD_SPU_HWC_OVSA_HPXL_VLN);
addr += 1;
if ((addr & 0x00ff) == 0)
addr += 0xf00;
if ((addr & 0x30ff) == 0)
addr = SRAM_HWC32_RAM2;
}
}
}
static void armada_drm_crtc_cursor_tran(void __iomem *base)
{
unsigned addr;
for (addr = 0; addr < 256; addr++) {
/* write the default value */
writel_relaxed(0x55555555, base + LCD_SPU_SRAM_WRDAT);
writel_relaxed(addr | SRAM_WRITE | SRAM_HWC32_TRAN,
base + LCD_SPU_SRAM_CTRL);
}
}
static int armada_drm_crtc_cursor_update(struct armada_crtc *dcrtc, bool reload)
{
uint32_t xoff, xscr, w = dcrtc->cursor_w, s;
uint32_t yoff, yscr, h = dcrtc->cursor_h;
uint32_t para1;
/*
* Calculate the visible width and height of the cursor,
* screen position, and the position in the cursor bitmap.
*/
if (dcrtc->cursor_x < 0) {
xoff = -dcrtc->cursor_x;
xscr = 0;
w -= min(xoff, w);
} else if (dcrtc->cursor_x + w > dcrtc->crtc.mode.hdisplay) {
xoff = 0;
xscr = dcrtc->cursor_x;
w = max_t(int, dcrtc->crtc.mode.hdisplay - dcrtc->cursor_x, 0);
} else {
xoff = 0;
xscr = dcrtc->cursor_x;
}
if (dcrtc->cursor_y < 0) {
yoff = -dcrtc->cursor_y;
yscr = 0;
h -= min(yoff, h);
} else if (dcrtc->cursor_y + h > dcrtc->crtc.mode.vdisplay) {
yoff = 0;
yscr = dcrtc->cursor_y;
h = max_t(int, dcrtc->crtc.mode.vdisplay - dcrtc->cursor_y, 0);
} else {
yoff = 0;
yscr = dcrtc->cursor_y;
}
/* On interlaced modes, the vertical cursor size must be halved */
s = dcrtc->cursor_w;
if (dcrtc->interlaced) {
s *= 2;
yscr /= 2;
h /= 2;
}
if (!dcrtc->cursor_obj || !h || !w) {
spin_lock_irq(&dcrtc->irq_lock);
armada_drm_crtc_disable_irq(dcrtc, DUMB_FRAMEDONE_ENA);
dcrtc->cursor_update = false;
armada_updatel(0, CFG_HWC_ENA, dcrtc->base + LCD_SPU_DMA_CTRL0);
spin_unlock_irq(&dcrtc->irq_lock);
return 0;
}
para1 = readl_relaxed(dcrtc->base + LCD_SPU_SRAM_PARA1);
armada_updatel(CFG_CSB_256x32, CFG_CSB_256x32 | CFG_PDWN256x32,
dcrtc->base + LCD_SPU_SRAM_PARA1);
/*
* Initialize the transparency if the SRAM was powered down.
* We must also reload the cursor data as well.
*/
if (!(para1 & CFG_CSB_256x32)) {
armada_drm_crtc_cursor_tran(dcrtc->base);
reload = true;
}
if (dcrtc->cursor_hw_sz != (h << 16 | w)) {
spin_lock_irq(&dcrtc->irq_lock);
armada_drm_crtc_disable_irq(dcrtc, DUMB_FRAMEDONE_ENA);
dcrtc->cursor_update = false;
armada_updatel(0, CFG_HWC_ENA, dcrtc->base + LCD_SPU_DMA_CTRL0);
spin_unlock_irq(&dcrtc->irq_lock);
reload = true;
}
if (reload) {
struct armada_gem_object *obj = dcrtc->cursor_obj;
uint32_t *pix;
/* Set the top-left corner of the cursor image */
pix = obj->addr;
pix += yoff * s + xoff;
armada_load_cursor_argb(dcrtc->base, pix, s, w, h);
}
/* Reload the cursor position, size and enable in the IRQ handler */
spin_lock_irq(&dcrtc->irq_lock);
dcrtc->cursor_hw_pos = yscr << 16 | xscr;
dcrtc->cursor_hw_sz = h << 16 | w;
dcrtc->cursor_update = true;
armada_drm_crtc_enable_irq(dcrtc, DUMB_FRAMEDONE_ENA);
spin_unlock_irq(&dcrtc->irq_lock);
return 0;
}
static void cursor_update(void *data)
{
armada_drm_crtc_cursor_update(data, true);
}
static int armada_drm_crtc_cursor_set(struct drm_crtc *crtc,
struct drm_file *file, uint32_t handle, uint32_t w, uint32_t h)
{
struct drm_device *dev = crtc->dev;
struct armada_crtc *dcrtc = drm_to_armada_crtc(crtc);
struct armada_private *priv = crtc->dev->dev_private;
struct armada_gem_object *obj = NULL;
int ret;
/* If no cursor support, replicate drm's return value */
if (!priv->variant->has_spu_adv_reg)
return -ENXIO;
if (handle && w > 0 && h > 0) {
/* maximum size is 64x32 or 32x64 */
if (w > 64 || h > 64 || (w > 32 && h > 32))
return -ENOMEM;
obj = armada_gem_object_lookup(dev, file, handle);
if (!obj)
return -ENOENT;
/* Must be a kernel-mapped object */
if (!obj->addr) {
drm_gem_object_unreference_unlocked(&obj->obj);
return -EINVAL;
}
if (obj->obj.size < w * h * 4) {
DRM_ERROR("buffer is too small\n");
drm_gem_object_unreference_unlocked(&obj->obj);
return -ENOMEM;
}
}
mutex_lock(&dev->struct_mutex);
if (dcrtc->cursor_obj) {
dcrtc->cursor_obj->update = NULL;
dcrtc->cursor_obj->update_data = NULL;
drm_gem_object_unreference(&dcrtc->cursor_obj->obj);
}
dcrtc->cursor_obj = obj;
dcrtc->cursor_w = w;
dcrtc->cursor_h = h;
ret = armada_drm_crtc_cursor_update(dcrtc, true);
if (obj) {
obj->update_data = dcrtc;
obj->update = cursor_update;
}
mutex_unlock(&dev->struct_mutex);
return ret;
}
static int armada_drm_crtc_cursor_move(struct drm_crtc *crtc, int x, int y)
{
struct drm_device *dev = crtc->dev;
struct armada_crtc *dcrtc = drm_to_armada_crtc(crtc);
struct armada_private *priv = crtc->dev->dev_private;
int ret;
/* If no cursor support, replicate drm's return value */
if (!priv->variant->has_spu_adv_reg)
return -EFAULT;
mutex_lock(&dev->struct_mutex);
dcrtc->cursor_x = x;
dcrtc->cursor_y = y;
ret = armada_drm_crtc_cursor_update(dcrtc, false);
mutex_unlock(&dev->struct_mutex);
return ret;
}
static void armada_drm_crtc_destroy(struct drm_crtc *crtc)
{
struct armada_crtc *dcrtc = drm_to_armada_crtc(crtc);
struct armada_private *priv = crtc->dev->dev_private;
if (dcrtc->cursor_obj)
drm_gem_object_unreference(&dcrtc->cursor_obj->obj);
priv->dcrtc[dcrtc->num] = NULL;
drm_crtc_cleanup(&dcrtc->crtc);
if (!IS_ERR(dcrtc->clk))
clk_disable_unprepare(dcrtc->clk);
writel_relaxed(0, dcrtc->base + LCD_SPU_IRQ_ENA);
kfree(dcrtc);
}
/*
* The mode_config lock is held here, to prevent races between this
* and a mode_set.
*/
static int armada_drm_crtc_page_flip(struct drm_crtc *crtc,
struct drm_framebuffer *fb, struct drm_pending_vblank_event *event, uint32_t page_flip_flags)
{
struct armada_crtc *dcrtc = drm_to_armada_crtc(crtc);
struct armada_frame_work *work;
struct drm_device *dev = crtc->dev;
unsigned long flags;
unsigned i;
int ret;
/* We don't support changing the pixel format */
if (fb->pixel_format != crtc->primary->fb->pixel_format)
return -EINVAL;
work = kmalloc(sizeof(*work), GFP_KERNEL);
if (!work)
return -ENOMEM;
work->event = event;
work->old_fb = dcrtc->crtc.primary->fb;
i = armada_drm_crtc_calc_fb(fb, crtc->x, crtc->y, work->regs,
dcrtc->interlaced);
armada_reg_queue_end(work->regs, i);
/*
* Hold the old framebuffer for the work - DRM appears to drop our
* reference to the old framebuffer in drm_mode_page_flip_ioctl().
*/
drm_framebuffer_reference(work->old_fb);
ret = armada_drm_crtc_queue_frame_work(dcrtc, work);
if (ret) {
/*
* Undo our reference above; DRM does not drop the reference
* to this object on error, so that's okay.
*/
drm_framebuffer_unreference(work->old_fb);
kfree(work);
return ret;
}
/*
* Don't take a reference on the new framebuffer;
* drm_mode_page_flip_ioctl() has already grabbed a reference and
* will _not_ drop that reference on successful return from this
* function. Simply mark this new framebuffer as the current one.
*/
dcrtc->crtc.primary->fb = fb;
/*
* Finally, if the display is blanked, we won't receive an
* interrupt, so complete it now.
*/
if (dpms_blanked(dcrtc->dpms)) {
spin_lock_irqsave(&dev->event_lock, flags);
if (dcrtc->frame_work)
armada_drm_crtc_complete_frame_work(dcrtc);
spin_unlock_irqrestore(&dev->event_lock, flags);
}
return 0;
}
static int
armada_drm_crtc_set_property(struct drm_crtc *crtc,
struct drm_property *property, uint64_t val)
{
struct armada_private *priv = crtc->dev->dev_private;
struct armada_crtc *dcrtc = drm_to_armada_crtc(crtc);
bool update_csc = false;
if (property == priv->csc_yuv_prop) {
dcrtc->csc_yuv_mode = val;
update_csc = true;
} else if (property == priv->csc_rgb_prop) {
dcrtc->csc_rgb_mode = val;
update_csc = true;
}
if (update_csc) {
uint32_t val;
val = dcrtc->spu_iopad_ctrl |
armada_drm_crtc_calculate_csc(dcrtc);
writel_relaxed(val, dcrtc->base + LCD_SPU_IOPAD_CONTROL);
}
return 0;
}
static struct drm_crtc_funcs armada_crtc_funcs = {
.cursor_set = armada_drm_crtc_cursor_set,
.cursor_move = armada_drm_crtc_cursor_move,
.destroy = armada_drm_crtc_destroy,
.set_config = drm_crtc_helper_set_config,
.page_flip = armada_drm_crtc_page_flip,
.set_property = armada_drm_crtc_set_property,
};
static struct drm_prop_enum_list armada_drm_csc_yuv_enum_list[] = {
{ CSC_AUTO, "Auto" },
{ CSC_YUV_CCIR601, "CCIR601" },
{ CSC_YUV_CCIR709, "CCIR709" },
};
static struct drm_prop_enum_list armada_drm_csc_rgb_enum_list[] = {
{ CSC_AUTO, "Auto" },
{ CSC_RGB_COMPUTER, "Computer system" },
{ CSC_RGB_STUDIO, "Studio" },
};
static int armada_drm_crtc_create_properties(struct drm_device *dev)
{
struct armada_private *priv = dev->dev_private;
if (priv->csc_yuv_prop)
return 0;
priv->csc_yuv_prop = drm_property_create_enum(dev, 0,
"CSC_YUV", armada_drm_csc_yuv_enum_list,
ARRAY_SIZE(armada_drm_csc_yuv_enum_list));
priv->csc_rgb_prop = drm_property_create_enum(dev, 0,
"CSC_RGB", armada_drm_csc_rgb_enum_list,
ARRAY_SIZE(armada_drm_csc_rgb_enum_list));
if (!priv->csc_yuv_prop || !priv->csc_rgb_prop)
return -ENOMEM;
return 0;
}
int armada_drm_crtc_create(struct drm_device *dev, struct resource *res,
int irq)
{
struct armada_private *priv = dev->dev_private;
struct armada_crtc *dcrtc;
void __iomem *base;
int ret;
ret = armada_drm_crtc_create_properties(dev);
if (ret)
return ret;
base = devm_request_and_ioremap(dev->dev, res);
if (!base) {
DRM_ERROR("failed to ioremap register\n");
return -ENOMEM;
}
dcrtc = kzalloc(sizeof(*dcrtc), GFP_KERNEL);
if (!dcrtc) {
DRM_ERROR("failed to allocate Armada crtc\n");
return -ENOMEM;
}
dcrtc->base = base;
dcrtc->num = dev->mode_config.num_crtc;
dcrtc->clk = ERR_PTR(-EINVAL);
dcrtc->csc_yuv_mode = CSC_AUTO;
dcrtc->csc_rgb_mode = CSC_AUTO;
dcrtc->cfg_dumb_ctrl = DUMB24_RGB888_0;
dcrtc->spu_iopad_ctrl = CFG_VSCALE_LN_EN | CFG_IOPAD_DUMB24;
spin_lock_init(&dcrtc->irq_lock);
dcrtc->irq_ena = CLEAN_SPU_IRQ_ISR;
INIT_LIST_HEAD(&dcrtc->vbl_list);
init_waitqueue_head(&dcrtc->frame_wait);
/* Initialize some registers which we don't otherwise set */
writel_relaxed(0x00000001, dcrtc->base + LCD_CFG_SCLK_DIV);
writel_relaxed(0x00000000, dcrtc->base + LCD_SPU_BLANKCOLOR);
writel_relaxed(dcrtc->spu_iopad_ctrl,
dcrtc->base + LCD_SPU_IOPAD_CONTROL);
writel_relaxed(0x00000000, dcrtc->base + LCD_SPU_SRAM_PARA0);
writel_relaxed(CFG_PDWN256x32 | CFG_PDWN256x24 | CFG_PDWN256x8 |
CFG_PDWN32x32 | CFG_PDWN16x66 | CFG_PDWN32x66 |
CFG_PDWN64x66, dcrtc->base + LCD_SPU_SRAM_PARA1);
writel_relaxed(0x2032ff81, dcrtc->base + LCD_SPU_DMA_CTRL1);
writel_relaxed(0x00000000, dcrtc->base + LCD_SPU_GRA_OVSA_HPXL_VLN);
writel_relaxed(dcrtc->irq_ena, dcrtc->base + LCD_SPU_IRQ_ENA);
writel_relaxed(0, dcrtc->base + LCD_SPU_IRQ_ISR);
ret = devm_request_irq(dev, irq, armada_drm_irq, 0, "armada_drm_crtc",
dcrtc);
if (ret < 0) {
kfree(dcrtc);
return ret;
}
if (priv->variant->crtc_init) {
ret = priv->variant->crtc_init(dcrtc);
if (ret) {
kfree(dcrtc);
return ret;
}
}
/* Ensure AXI pipeline is enabled */
armada_updatel(CFG_ARBFAST_ENA, 0, dcrtc->base + LCD_SPU_DMA_CTRL0);
priv->dcrtc[dcrtc->num] = dcrtc;
drm_crtc_init(dev, &dcrtc->crtc, &armada_crtc_funcs);
drm_crtc_helper_add(&dcrtc->crtc, &armada_crtc_helper_funcs);
drm_object_attach_property(&dcrtc->crtc.base, priv->csc_yuv_prop,
dcrtc->csc_yuv_mode);
drm_object_attach_property(&dcrtc->crtc.base, priv->csc_rgb_prop,
dcrtc->csc_rgb_mode);
return armada_overlay_plane_create(dev, 1 << dcrtc->num);
}
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