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-rw-r--r--arch/arm/mach-omap2/display.c195
1 files changed, 195 insertions, 0 deletions
diff --git a/arch/arm/mach-omap2/display.c b/arch/arm/mach-omap2/display.c
index adb2756e242..3677b1f58b8 100644
--- a/arch/arm/mach-omap2/display.c
+++ b/arch/arm/mach-omap2/display.c
@@ -22,13 +22,42 @@
#include <linux/io.h>
#include <linux/clk.h>
#include <linux/err.h>
+#include <linux/delay.h>
#include <video/omapdss.h>
#include <plat/omap_hwmod.h>
#include <plat/omap_device.h>
#include <plat/omap-pm.h>
+#include "common.h"
+#include "mux.h"
#include "control.h"
+#include "display.h"
+
+#define DISPC_CONTROL 0x0040
+#define DISPC_CONTROL2 0x0238
+#define DISPC_IRQSTATUS 0x0018
+
+#define DSS_SYSCONFIG 0x10
+#define DSS_SYSSTATUS 0x14
+#define DSS_CONTROL 0x40
+#define DSS_SDI_CONTROL 0x44
+#define DSS_PLL_CONTROL 0x48
+
+#define LCD_EN_MASK (0x1 << 0)
+#define DIGIT_EN_MASK (0x1 << 1)
+
+#define FRAMEDONE_IRQ_SHIFT 0
+#define EVSYNC_EVEN_IRQ_SHIFT 2
+#define EVSYNC_ODD_IRQ_SHIFT 3
+#define FRAMEDONE2_IRQ_SHIFT 22
+#define FRAMEDONETV_IRQ_SHIFT 24
+
+/*
+ * FRAMEDONE_IRQ_TIMEOUT: how long (in milliseconds) to wait during DISPC
+ * reset before deciding that something has gone wrong
+ */
+#define FRAMEDONE_IRQ_TIMEOUT 100
static struct platform_device omap_display_device = {
.name = "omapdss",
@@ -69,6 +98,32 @@ static const struct omap_dss_hwmod_data omap4_dss_hwmod_data[] __initdata = {
{ "dss_hdmi", "omapdss_hdmi", -1 },
};
+static void omap4_hdmi_mux_pads(enum omap_hdmi_flags flags)
+{
+ u32 reg;
+ u16 control_i2c_1;
+
+ omap_mux_init_signal("hdmi_cec",
+ OMAP_PIN_INPUT_PULLUP);
+ omap_mux_init_signal("hdmi_ddc_scl",
+ OMAP_PIN_INPUT_PULLUP);
+ omap_mux_init_signal("hdmi_ddc_sda",
+ OMAP_PIN_INPUT_PULLUP);
+
+ /*
+ * CONTROL_I2C_1: HDMI_DDC_SDA_PULLUPRESX (bit 28) and
+ * HDMI_DDC_SCL_PULLUPRESX (bit 24) are set to disable
+ * internal pull up resistor.
+ */
+ if (flags & OMAP_HDMI_SDA_SCL_EXTERNAL_PULLUP) {
+ control_i2c_1 = OMAP4_CTRL_MODULE_PAD_CORE_CONTROL_I2C_1;
+ reg = omap4_ctrl_pad_readl(control_i2c_1);
+ reg |= (OMAP4_HDMI_DDC_SDA_PULLUPRESX_MASK |
+ OMAP4_HDMI_DDC_SCL_PULLUPRESX_MASK);
+ omap4_ctrl_pad_writel(reg, control_i2c_1);
+ }
+}
+
static int omap4_dsi_mux_pads(int dsi_id, unsigned lanes)
{
u32 enable_mask, enable_shift;
@@ -102,6 +157,14 @@ static int omap4_dsi_mux_pads(int dsi_id, unsigned lanes)
return 0;
}
+int omap_hdmi_init(enum omap_hdmi_flags flags)
+{
+ if (cpu_is_omap44xx())
+ omap4_hdmi_mux_pads(flags);
+
+ return 0;
+}
+
static int omap_dsi_enable_pads(int dsi_id, unsigned lane_mask)
{
if (cpu_is_omap44xx())
@@ -172,3 +235,135 @@ int __init omap_display_init(struct omap_dss_board_info *board_data)
return r;
}
+
+static void dispc_disable_outputs(void)
+{
+ u32 v, irq_mask = 0;
+ bool lcd_en, digit_en, lcd2_en = false;
+ int i;
+ struct omap_dss_dispc_dev_attr *da;
+ struct omap_hwmod *oh;
+
+ oh = omap_hwmod_lookup("dss_dispc");
+ if (!oh) {
+ WARN(1, "display: could not disable outputs during reset - could not find dss_dispc hwmod\n");
+ return;
+ }
+
+ if (!oh->dev_attr) {
+ pr_err("display: could not disable outputs during reset due to missing dev_attr\n");
+ return;
+ }
+
+ da = (struct omap_dss_dispc_dev_attr *)oh->dev_attr;
+
+ /* store value of LCDENABLE and DIGITENABLE bits */
+ v = omap_hwmod_read(oh, DISPC_CONTROL);
+ lcd_en = v & LCD_EN_MASK;
+ digit_en = v & DIGIT_EN_MASK;
+
+ /* store value of LCDENABLE for LCD2 */
+ if (da->manager_count > 2) {
+ v = omap_hwmod_read(oh, DISPC_CONTROL2);
+ lcd2_en = v & LCD_EN_MASK;
+ }
+
+ if (!(lcd_en | digit_en | lcd2_en))
+ return; /* no managers currently enabled */
+
+ /*
+ * If any manager was enabled, we need to disable it before
+ * DSS clocks are disabled or DISPC module is reset
+ */
+ if (lcd_en)
+ irq_mask |= 1 << FRAMEDONE_IRQ_SHIFT;
+
+ if (digit_en) {
+ if (da->has_framedonetv_irq) {
+ irq_mask |= 1 << FRAMEDONETV_IRQ_SHIFT;
+ } else {
+ irq_mask |= 1 << EVSYNC_EVEN_IRQ_SHIFT |
+ 1 << EVSYNC_ODD_IRQ_SHIFT;
+ }
+ }
+
+ if (lcd2_en)
+ irq_mask |= 1 << FRAMEDONE2_IRQ_SHIFT;
+
+ /*
+ * clear any previous FRAMEDONE, FRAMEDONETV,
+ * EVSYNC_EVEN/ODD or FRAMEDONE2 interrupts
+ */
+ omap_hwmod_write(irq_mask, oh, DISPC_IRQSTATUS);
+
+ /* disable LCD and TV managers */
+ v = omap_hwmod_read(oh, DISPC_CONTROL);
+ v &= ~(LCD_EN_MASK | DIGIT_EN_MASK);
+ omap_hwmod_write(v, oh, DISPC_CONTROL);
+
+ /* disable LCD2 manager */
+ if (da->manager_count > 2) {
+ v = omap_hwmod_read(oh, DISPC_CONTROL2);
+ v &= ~LCD_EN_MASK;
+ omap_hwmod_write(v, oh, DISPC_CONTROL2);
+ }
+
+ i = 0;
+ while ((omap_hwmod_read(oh, DISPC_IRQSTATUS) & irq_mask) !=
+ irq_mask) {
+ i++;
+ if (i > FRAMEDONE_IRQ_TIMEOUT) {
+ pr_err("didn't get FRAMEDONE1/2 or TV interrupt\n");
+ break;
+ }
+ mdelay(1);
+ }
+}
+
+#define MAX_MODULE_SOFTRESET_WAIT 10000
+int omap_dss_reset(struct omap_hwmod *oh)
+{
+ struct omap_hwmod_opt_clk *oc;
+ int c = 0;
+ int i, r;
+
+ if (!(oh->class->sysc->sysc_flags & SYSS_HAS_RESET_STATUS)) {
+ pr_err("dss_core: hwmod data doesn't contain reset data\n");
+ return -EINVAL;
+ }
+
+ for (i = oh->opt_clks_cnt, oc = oh->opt_clks; i > 0; i--, oc++)
+ if (oc->_clk)
+ clk_enable(oc->_clk);
+
+ dispc_disable_outputs();
+
+ /* clear SDI registers */
+ if (cpu_is_omap3430()) {
+ omap_hwmod_write(0x0, oh, DSS_SDI_CONTROL);
+ omap_hwmod_write(0x0, oh, DSS_PLL_CONTROL);
+ }
+
+ /*
+ * clear DSS_CONTROL register to switch DSS clock sources to
+ * PRCM clock, if any
+ */
+ omap_hwmod_write(0x0, oh, DSS_CONTROL);
+
+ omap_test_timeout((omap_hwmod_read(oh, oh->class->sysc->syss_offs)
+ & SYSS_RESETDONE_MASK),
+ MAX_MODULE_SOFTRESET_WAIT, c);
+
+ if (c == MAX_MODULE_SOFTRESET_WAIT)
+ pr_warning("dss_core: waiting for reset to finish failed\n");
+ else
+ pr_debug("dss_core: softreset done\n");
+
+ for (i = oh->opt_clks_cnt, oc = oh->opt_clks; i > 0; i--, oc++)
+ if (oc->_clk)
+ clk_disable(oc->_clk);
+
+ r = (c == MAX_MODULE_SOFTRESET_WAIT) ? -ETIMEDOUT : 0;
+
+ return r;
+}