#include <linux/hardirq.h>
#include <linux/interrupt.h>
#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
#include <plat/sram.h>
#include <plat/clock.h>
static struct {
struct platform_device *pdev;
void __iomem *base;
+
+ int ctx_loss_cnt;
+
int irq;
+ struct clk *dss_clk;
u32 fifo_size[3];
#define RR(reg) \
dispc_write_reg(DISPC_##reg, dispc.ctx[DISPC_##reg / sizeof(u32)])
-void dispc_save_context(void)
+static void dispc_save_context(void)
{
int i;
- if (cpu_is_omap24xx())
- return;
- SR(SYSCONFIG);
+ DSSDBG("dispc_save_context\n");
+
SR(IRQENABLE);
SR(CONTROL);
SR(CONFIG);
SR(DIVISOR);
}
-void dispc_restore_context(void)
+static void dispc_restore_context(void)
{
int i;
- RR(SYSCONFIG);
+
+ DSSDBG("dispc_restore_context\n");
+
/*RR(IRQENABLE);*/
/*RR(CONTROL);*/
RR(CONFIG);
#undef SR
#undef RR
-static inline void enable_clocks(bool enable)
+static void dispc_init_ctx_loss_count(void)
{
- if (enable)
- dss_clk_enable(DSS_CLK_ICK | DSS_CLK_FCK);
- else
- dss_clk_disable(DSS_CLK_ICK | DSS_CLK_FCK);
+ struct device *dev = &dispc.pdev->dev;
+ struct omap_display_platform_data *pdata = dev->platform_data;
+ struct omap_dss_board_info *board_data = pdata->board_data;
+ int cnt = 0;
+
+ /*
+ * get_context_loss_count returns negative on error. We'll ignore the
+ * error and store the error to ctx_loss_cnt, which will cause
+ * dispc_need_ctx_restore() call to return true.
+ */
+
+ if (board_data->get_context_loss_count)
+ cnt = board_data->get_context_loss_count(dev);
+
+ WARN_ON(cnt < 0);
+
+ dispc.ctx_loss_cnt = cnt;
+
+ DSSDBG("initial ctx_loss_cnt %u\n", cnt);
+}
+
+static bool dispc_need_ctx_restore(void)
+{
+ struct device *dev = &dispc.pdev->dev;
+ struct omap_display_platform_data *pdata = dev->platform_data;
+ struct omap_dss_board_info *board_data = pdata->board_data;
+ int cnt;
+
+ /*
+ * If get_context_loss_count is not available, assume that we need
+ * context restore always.
+ */
+ if (!board_data->get_context_loss_count)
+ return true;
+
+ cnt = board_data->get_context_loss_count(dev);
+ if (cnt < 0) {
+ dev_err(dev, "getting context loss count failed, will force "
+ "context restore\n");
+ dispc.ctx_loss_cnt = cnt;
+ return true;
+ }
+
+ if (cnt == dispc.ctx_loss_cnt)
+ return false;
+
+ DSSDBG("ctx_loss_cnt %d -> %d\n", dispc.ctx_loss_cnt, cnt);
+ dispc.ctx_loss_cnt = cnt;
+
+ return true;
+}
+
+int dispc_runtime_get(void)
+{
+ int r;
+
+ DSSDBG("dispc_runtime_get\n");
+
+ r = pm_runtime_get_sync(&dispc.pdev->dev);
+ WARN_ON(r < 0);
+ return r < 0 ? r : 0;
+}
+
+void dispc_runtime_put(void)
+{
+ int r;
+
+ DSSDBG("dispc_runtime_put\n");
+
+ r = pm_runtime_put(&dispc.pdev->dev);
+ WARN_ON(r < 0);
}
+
bool dispc_go_busy(enum omap_channel channel)
{
int bit;
int bit;
bool enable_bit, go_bit;
- enable_clocks(1);
+ dispc_runtime_get();
if (channel == OMAP_DSS_CHANNEL_LCD ||
channel == OMAP_DSS_CHANNEL_LCD2)
else
REG_FLD_MOD(DISPC_CONTROL, 1, bit, bit);
end:
- enable_clocks(0);
+ dispc_runtime_put();
}
static void _dispc_write_firh_reg(enum omap_plane plane, int reg, u32 value)
{
int shift;
- enable_clocks(1);
+ dispc_runtime_get();
switch (plane) {
case OMAP_DSS_GFX:
REG_FLD_MOD(DISPC_OVL_ATTRIBUTES(plane), burst_size, shift + 1, shift);
- enable_clocks(0);
+ dispc_runtime_put();
}
static void dispc_configure_burst_sizes(void)
else
bit = 10;
- enable_clocks(1);
+ dispc_runtime_get();
REG_FLD_MOD(DISPC_OVL_ATTRIBUTES(plane), enable, bit, bit);
- enable_clocks(0);
+ dispc_runtime_put();
}
void dispc_set_lcd_size(enum omap_channel channel, u16 width, u16 height)
u32 val;
BUG_ON((width > (1 << 11)) || (height > (1 << 11)));
val = FLD_VAL(height - 1, 26, 16) | FLD_VAL(width - 1, 10, 0);
- enable_clocks(1);
+ dispc_runtime_get();
dispc_write_reg(DISPC_SIZE_MGR(channel), val);
- enable_clocks(0);
+ dispc_runtime_put();
}
void dispc_set_digit_size(u16 width, u16 height)
u32 val;
BUG_ON((width > (1 << 11)) || (height > (1 << 11)));
val = FLD_VAL(height - 1, 26, 16) | FLD_VAL(width - 1, 10, 0);
- enable_clocks(1);
+ dispc_runtime_get();
dispc_write_reg(DISPC_SIZE_MGR(OMAP_DSS_CHANNEL_DIGIT), val);
- enable_clocks(0);
+ dispc_runtime_put();
}
static void dispc_read_plane_fifo_sizes(void)
unit = dss_feat_get_buffer_size_unit();
- enable_clocks(1);
+ dispc_runtime_get();
dss_feat_get_reg_field(FEAT_REG_FIFOSIZE, &start, &end);
dispc.fifo_size[plane] = size;
}
- enable_clocks(0);
+ dispc_runtime_put();
}
u32 dispc_get_plane_fifo_size(enum omap_plane plane)
dss_feat_get_reg_field(FEAT_REG_FIFOHIGHTHRESHOLD, &hi_start, &hi_end);
dss_feat_get_reg_field(FEAT_REG_FIFOLOWTHRESHOLD, &lo_start, &lo_end);
- enable_clocks(1);
+ dispc_runtime_get();
DSSDBG("fifo(%d) low/high old %u/%u, new %u/%u\n",
plane,
FLD_VAL(high, hi_start, hi_end) |
FLD_VAL(low, lo_start, lo_end));
- enable_clocks(0);
+ dispc_runtime_put();
}
void dispc_enable_fifomerge(bool enable)
{
- enable_clocks(1);
+ dispc_runtime_get();
DSSDBG("FIFO merge %s\n", enable ? "enabled" : "disabled");
REG_FLD_MOD(DISPC_CONFIG, enable ? 1 : 0, 14, 14);
- enable_clocks(0);
+ dispc_runtime_put();
}
static void _dispc_set_fir(enum omap_plane plane,
void dispc_set_channel_out(enum omap_plane plane, enum omap_channel channel_out)
{
- enable_clocks(1);
+ dispc_runtime_get();
_dispc_set_channel_out(plane, channel_out);
- enable_clocks(0);
+ dispc_runtime_put();
}
static int _dispc_setup_plane(enum omap_plane plane,
int r;
u32 irq;
- enable_clocks(1);
+ dispc_runtime_get();
/* When we disable LCD output, we need to wait until frame is done.
* Otherwise the DSS is still working, and turning off the clocks
DSSERR("failed to unregister FRAMEDONE isr\n");
}
- enable_clocks(0);
+ dispc_runtime_put();
}
static void _enable_digit_out(bool enable)
struct completion frame_done_completion;
int r;
- enable_clocks(1);
+ dispc_runtime_get();
if (REG_GET(DISPC_CONTROL, 1, 1) == enable) {
- enable_clocks(0);
+ dispc_runtime_put();
return;
}
spin_unlock_irqrestore(&dispc.irq_lock, flags);
}
- enable_clocks(0);
+ dispc_runtime_put();
}
bool dispc_is_channel_enabled(enum omap_channel channel)
if (!dss_has_feature(FEAT_LCDENABLEPOL))
return;
- enable_clocks(1);
+ dispc_runtime_get();
REG_FLD_MOD(DISPC_CONTROL, act_high ? 1 : 0, 29, 29);
- enable_clocks(0);
+ dispc_runtime_put();
}
void dispc_lcd_enable_signal(bool enable)
if (!dss_has_feature(FEAT_LCDENABLESIGNAL))
return;
- enable_clocks(1);
+ dispc_runtime_get();
REG_FLD_MOD(DISPC_CONTROL, enable ? 1 : 0, 28, 28);
- enable_clocks(0);
+ dispc_runtime_put();
}
void dispc_pck_free_enable(bool enable)
if (!dss_has_feature(FEAT_PCKFREEENABLE))
return;
- enable_clocks(1);
+ dispc_runtime_get();
REG_FLD_MOD(DISPC_CONTROL, enable ? 1 : 0, 27, 27);
- enable_clocks(0);
+ dispc_runtime_put();
}
void dispc_enable_fifohandcheck(enum omap_channel channel, bool enable)
{
- enable_clocks(1);
+ dispc_runtime_get();
if (channel == OMAP_DSS_CHANNEL_LCD2)
REG_FLD_MOD(DISPC_CONFIG2, enable ? 1 : 0, 16, 16);
else
REG_FLD_MOD(DISPC_CONFIG, enable ? 1 : 0, 16, 16);
- enable_clocks(0);
+ dispc_runtime_put();
}
return;
}
- enable_clocks(1);
+ dispc_runtime_get();
if (channel == OMAP_DSS_CHANNEL_LCD2)
REG_FLD_MOD(DISPC_CONTROL2, mode, 3, 3);
else
REG_FLD_MOD(DISPC_CONTROL, mode, 3, 3);
- enable_clocks(0);
+ dispc_runtime_put();
}
void dispc_set_loadmode(enum omap_dss_load_mode mode)
{
- enable_clocks(1);
+ dispc_runtime_get();
REG_FLD_MOD(DISPC_CONFIG, mode, 2, 1);
- enable_clocks(0);
+ dispc_runtime_put();
}
void dispc_set_default_color(enum omap_channel channel, u32 color)
{
- enable_clocks(1);
+ dispc_runtime_get();
dispc_write_reg(DISPC_DEFAULT_COLOR(channel), color);
- enable_clocks(0);
+ dispc_runtime_put();
}
u32 dispc_get_default_color(enum omap_channel channel)
channel != OMAP_DSS_CHANNEL_LCD &&
channel != OMAP_DSS_CHANNEL_LCD2);
- enable_clocks(1);
+ dispc_runtime_get();
l = dispc_read_reg(DISPC_DEFAULT_COLOR(channel));
- enable_clocks(0);
+ dispc_runtime_put();
return l;
}
enum omap_dss_trans_key_type type,
u32 trans_key)
{
- enable_clocks(1);
+ dispc_runtime_get();
if (ch == OMAP_DSS_CHANNEL_LCD)
REG_FLD_MOD(DISPC_CONFIG, type, 11, 11);
else if (ch == OMAP_DSS_CHANNEL_DIGIT)
REG_FLD_MOD(DISPC_CONFIG2, type, 11, 11);
dispc_write_reg(DISPC_TRANS_COLOR(ch), trans_key);
- enable_clocks(0);
+ dispc_runtime_put();
}
void dispc_get_trans_key(enum omap_channel ch,
enum omap_dss_trans_key_type *type,
u32 *trans_key)
{
- enable_clocks(1);
+ dispc_runtime_get();
if (type) {
if (ch == OMAP_DSS_CHANNEL_LCD)
*type = REG_GET(DISPC_CONFIG, 11, 11);
if (trans_key)
*trans_key = dispc_read_reg(DISPC_TRANS_COLOR(ch));
- enable_clocks(0);
+ dispc_runtime_put();
}
void dispc_enable_trans_key(enum omap_channel ch, bool enable)
{
- enable_clocks(1);
+ dispc_runtime_get();
if (ch == OMAP_DSS_CHANNEL_LCD)
REG_FLD_MOD(DISPC_CONFIG, enable, 10, 10);
else if (ch == OMAP_DSS_CHANNEL_DIGIT)
REG_FLD_MOD(DISPC_CONFIG, enable, 12, 12);
else /* OMAP_DSS_CHANNEL_LCD2 */
REG_FLD_MOD(DISPC_CONFIG2, enable, 10, 10);
- enable_clocks(0);
+ dispc_runtime_put();
}
void dispc_enable_alpha_blending(enum omap_channel ch, bool enable)
{
if (!dss_has_feature(FEAT_GLOBAL_ALPHA))
return;
- enable_clocks(1);
+ dispc_runtime_get();
if (ch == OMAP_DSS_CHANNEL_LCD)
REG_FLD_MOD(DISPC_CONFIG, enable, 18, 18);
else if (ch == OMAP_DSS_CHANNEL_DIGIT)
REG_FLD_MOD(DISPC_CONFIG, enable, 19, 19);
else /* OMAP_DSS_CHANNEL_LCD2 */
REG_FLD_MOD(DISPC_CONFIG2, enable, 18, 18);
- enable_clocks(0);
+ dispc_runtime_put();
}
bool dispc_alpha_blending_enabled(enum omap_channel ch)
{
if (!dss_has_feature(FEAT_GLOBAL_ALPHA))
return false;
- enable_clocks(1);
+ dispc_runtime_get();
if (ch == OMAP_DSS_CHANNEL_LCD)
enabled = REG_GET(DISPC_CONFIG, 18, 18);
else if (ch == OMAP_DSS_CHANNEL_DIGIT)
enabled = REG_GET(DISPC_CONFIG2, 18, 18);
else
BUG();
- enable_clocks(0);
+ dispc_runtime_put();
return enabled;
}
{
bool enabled;
- enable_clocks(1);
+ dispc_runtime_get();
if (ch == OMAP_DSS_CHANNEL_LCD)
enabled = REG_GET(DISPC_CONFIG, 10, 10);
else if (ch == OMAP_DSS_CHANNEL_DIGIT)
enabled = REG_GET(DISPC_CONFIG2, 10, 10);
else
BUG();
- enable_clocks(0);
+ dispc_runtime_put();
return enabled;
}
return;
}
- enable_clocks(1);
+ dispc_runtime_get();
if (channel == OMAP_DSS_CHANNEL_LCD2)
REG_FLD_MOD(DISPC_CONTROL2, code, 9, 8);
else
REG_FLD_MOD(DISPC_CONTROL, code, 9, 8);
- enable_clocks(0);
+ dispc_runtime_put();
}
void dispc_set_parallel_interface_mode(enum omap_channel channel,
return;
}
- enable_clocks(1);
+ dispc_runtime_get();
if (channel == OMAP_DSS_CHANNEL_LCD2) {
l = dispc_read_reg(DISPC_CONTROL2);
dispc_write_reg(DISPC_CONTROL, l);
}
- enable_clocks(0);
+ dispc_runtime_put();
}
static bool _dispc_lcd_timings_ok(int hsw, int hfp, int hbp,
FLD_VAL(vbp, 31, 20);
}
- enable_clocks(1);
+ dispc_runtime_get();
dispc_write_reg(DISPC_TIMING_H(channel), timing_h);
dispc_write_reg(DISPC_TIMING_V(channel), timing_v);
- enable_clocks(0);
+ dispc_runtime_put();
}
/* change name to mode? */
BUG_ON(lck_div < 1);
BUG_ON(pck_div < 2);
- enable_clocks(1);
+ dispc_runtime_get();
dispc_write_reg(DISPC_DIVISORo(channel),
FLD_VAL(lck_div, 23, 16) | FLD_VAL(pck_div, 7, 0));
- enable_clocks(0);
+ dispc_runtime_put();
}
static void dispc_get_lcd_divisor(enum omap_channel channel, int *lck_div,
switch (dss_get_dispc_clk_source()) {
case OMAP_DSS_CLK_SRC_FCK:
- r = dss_clk_get_rate(DSS_CLK_FCK);
+ r = clk_get_rate(dispc.dss_clk);
break;
case OMAP_DSS_CLK_SRC_DSI_PLL_HSDIV_DISPC:
dsidev = dsi_get_dsidev_from_id(0);
switch (dss_get_lcd_clk_source(channel)) {
case OMAP_DSS_CLK_SRC_FCK:
- r = dss_clk_get_rate(DSS_CLK_FCK);
+ r = clk_get_rate(dispc.dss_clk);
break;
case OMAP_DSS_CLK_SRC_DSI_PLL_HSDIV_DISPC:
dsidev = dsi_get_dsidev_from_id(0);
enum omap_dss_clk_source dispc_clk_src = dss_get_dispc_clk_source();
enum omap_dss_clk_source lcd_clk_src;
- enable_clocks(1);
+ if (dispc_runtime_get())
+ return;
seq_printf(s, "- DISPC -\n");
seq_printf(s, "pck\t\t%-16lupck div\t%u\n",
dispc_pclk_rate(OMAP_DSS_CHANNEL_LCD2), pcd);
}
- enable_clocks(0);
+
+ dispc_runtime_put();
}
#ifdef CONFIG_OMAP2_DSS_COLLECT_IRQ_STATS
{
#define DUMPREG(r) seq_printf(s, "%-50s %08x\n", #r, dispc_read_reg(r))
- dss_clk_enable(DSS_CLK_ICK | DSS_CLK_FCK);
+ if (dispc_runtime_get())
+ return;
DUMPREG(DISPC_REVISION);
DUMPREG(DISPC_SYSCONFIG);
DUMPREG(DISPC_OVL_PRELOAD(OMAP_DSS_VIDEO2));
}
- dss_clk_disable(DSS_CLK_ICK | DSS_CLK_FCK);
+ dispc_runtime_put();
#undef DUMPREG
}
l |= FLD_VAL(acbi, 11, 8);
l |= FLD_VAL(acb, 7, 0);
- enable_clocks(1);
+ dispc_runtime_get();
dispc_write_reg(DISPC_POL_FREQ(channel), l);
- enable_clocks(0);
+ dispc_runtime_put();
}
void dispc_set_pol_freq(enum omap_channel channel,
mask |= isr_data->mask;
}
- enable_clocks(1);
+ dispc_runtime_get();
old_mask = dispc_read_reg(DISPC_IRQENABLE);
/* clear the irqstatus for newly enabled irqs */
dispc_write_reg(DISPC_IRQENABLE, mask);
- enable_clocks(0);
+ dispc_runtime_put();
}
int omap_dispc_register_isr(omap_dispc_isr_t isr, void *arg, u32 mask)
{
u32 l;
- l = dispc_read_reg(DISPC_SYSCONFIG);
- l = FLD_MOD(l, 2, 13, 12); /* MIDLEMODE: smart standby */
- l = FLD_MOD(l, 2, 4, 3); /* SIDLEMODE: smart idle */
- l = FLD_MOD(l, 1, 2, 2); /* ENWAKEUP */
- l = FLD_MOD(l, 1, 0, 0); /* AUTOIDLE */
- dispc_write_reg(DISPC_SYSCONFIG, l);
-
/* Exclusively enable DISPC_CORE_CLK and set divider to 1 */
if (dss_has_feature(FEAT_CORE_CLK_DIV)) {
l = dispc_read_reg(DISPC_DIVISOR);
{
DSSDBG("dispc_enable_plane %d, %d\n", plane, enable);
- enable_clocks(1);
+ dispc_runtime_get();
_dispc_enable_plane(plane, enable);
- enable_clocks(0);
+ dispc_runtime_put();
return 0;
}
ilace, color_mode,
rotation, mirror, channel);
- enable_clocks(1);
+ dispc_runtime_get();
r = _dispc_setup_plane(plane,
paddr, screen_width,
pre_mult_alpha,
channel, puv_addr);
- enable_clocks(0);
+ dispc_runtime_put();
return r;
}
u32 rev;
int r = 0;
struct resource *dispc_mem;
+ struct clk *clk;
dispc.pdev = pdev;
+ clk = clk_get(&pdev->dev, "fck");
+ if (IS_ERR(clk)) {
+ DSSERR("can't get fck\n");
+ r = PTR_ERR(clk);
+ goto err_get_clk;
+ }
+
+ dispc.dss_clk = clk;
+
spin_lock_init(&dispc.irq_lock);
#ifdef CONFIG_OMAP2_DSS_COLLECT_IRQ_STATS
if (!dispc_mem) {
DSSERR("can't get IORESOURCE_MEM DISPC\n");
r = -EINVAL;
- goto fail0;
+ goto err_ioremap;
}
dispc.base = ioremap(dispc_mem->start, resource_size(dispc_mem));
if (!dispc.base) {
DSSERR("can't ioremap DISPC\n");
r = -ENOMEM;
- goto fail0;
+ goto err_ioremap;
}
dispc.irq = platform_get_irq(dispc.pdev, 0);
if (dispc.irq < 0) {
DSSERR("platform_get_irq failed\n");
r = -ENODEV;
- goto fail1;
+ goto err_irq;
}
r = request_irq(dispc.irq, omap_dispc_irq_handler, IRQF_SHARED,
"OMAP DISPC", dispc.pdev);
if (r < 0) {
DSSERR("request_irq failed\n");
- goto fail1;
+ goto err_irq;
}
- enable_clocks(1);
+ dispc_init_ctx_loss_count();
+
+ pm_runtime_enable(&pdev->dev);
+
+ r = dispc_runtime_get();
+ if (r)
+ goto err_runtime_get;
_omap_dispc_initial_config();
_omap_dispc_initialize_irq();
- dispc_save_context();
-
rev = dispc_read_reg(DISPC_REVISION);
dev_dbg(&pdev->dev, "OMAP DISPC rev %d.%d\n",
FLD_GET(rev, 7, 4), FLD_GET(rev, 3, 0));
- enable_clocks(0);
+ dispc_runtime_put();
return 0;
-fail1:
+
+err_runtime_get:
+ pm_runtime_disable(&pdev->dev);
+ free_irq(dispc.irq, dispc.pdev);
+err_irq:
iounmap(dispc.base);
-fail0:
+err_ioremap:
+ clk_put(dispc.dss_clk);
+err_get_clk:
return r;
}
static int omap_dispchw_remove(struct platform_device *pdev)
{
+ pm_runtime_disable(&pdev->dev);
+
+ clk_put(dispc.dss_clk);
+
free_irq(dispc.irq, dispc.pdev);
iounmap(dispc.base);
return 0;
}
+static int dispc_runtime_suspend(struct device *dev)
+{
+ dispc_save_context();
+ clk_disable(dispc.dss_clk);
+ dss_runtime_put();
+
+ return 0;
+}
+
+static int dispc_runtime_resume(struct device *dev)
+{
+ int r;
+
+ r = dss_runtime_get();
+ if (r < 0)
+ return r;
+
+ clk_enable(dispc.dss_clk);
+ if (dispc_need_ctx_restore())
+ dispc_restore_context();
+
+ return 0;
+}
+
+static const struct dev_pm_ops dispc_pm_ops = {
+ .runtime_suspend = dispc_runtime_suspend,
+ .runtime_resume = dispc_runtime_resume,
+};
+
static struct platform_driver omap_dispchw_driver = {
.probe = omap_dispchw_probe,
.remove = omap_dispchw_remove,
.driver = {
.name = "omapdss_dispc",
.owner = THIS_MODULE,
+ .pm = &dispc_pm_ops,
},
};
projects / ~andy / linux / blobdiff