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-rw-r--r--drivers/gpu/ipu-v3/ipu-di.c749
1 files changed, 749 insertions, 0 deletions
diff --git a/drivers/gpu/ipu-v3/ipu-di.c b/drivers/gpu/ipu-v3/ipu-di.c
new file mode 100644
index 000000000..0a34e0ab4
--- /dev/null
+++ b/drivers/gpu/ipu-v3/ipu-di.c
@@ -0,0 +1,749 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (c) 2010 Sascha Hauer <s.hauer@pengutronix.de>
+ * Copyright (C) 2005-2009 Freescale Semiconductor, Inc.
+ */
+#include <linux/export.h>
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/errno.h>
+#include <linux/io.h>
+#include <linux/err.h>
+#include <linux/platform_device.h>
+
+#include <video/imx-ipu-v3.h>
+#include "ipu-prv.h"
+
+struct ipu_di {
+ void __iomem *base;
+ int id;
+ u32 module;
+ struct clk *clk_di; /* display input clock */
+ struct clk *clk_ipu; /* IPU bus clock */
+ struct clk *clk_di_pixel; /* resulting pixel clock */
+ bool inuse;
+ struct ipu_soc *ipu;
+};
+
+static DEFINE_MUTEX(di_mutex);
+
+struct di_sync_config {
+ int run_count;
+ int run_src;
+ int offset_count;
+ int offset_src;
+ int repeat_count;
+ int cnt_clr_src;
+ int cnt_polarity_gen_en;
+ int cnt_polarity_clr_src;
+ int cnt_polarity_trigger_src;
+ int cnt_up;
+ int cnt_down;
+};
+
+enum di_pins {
+ DI_PIN11 = 0,
+ DI_PIN12 = 1,
+ DI_PIN13 = 2,
+ DI_PIN14 = 3,
+ DI_PIN15 = 4,
+ DI_PIN16 = 5,
+ DI_PIN17 = 6,
+ DI_PIN_CS = 7,
+
+ DI_PIN_SER_CLK = 0,
+ DI_PIN_SER_RS = 1,
+};
+
+enum di_sync_wave {
+ DI_SYNC_NONE = 0,
+ DI_SYNC_CLK = 1,
+ DI_SYNC_INT_HSYNC = 2,
+ DI_SYNC_HSYNC = 3,
+ DI_SYNC_VSYNC = 4,
+ DI_SYNC_DE = 6,
+
+ DI_SYNC_CNT1 = 2, /* counter >= 2 only */
+ DI_SYNC_CNT4 = 5, /* counter >= 5 only */
+ DI_SYNC_CNT5 = 6, /* counter >= 6 only */
+};
+
+#define SYNC_WAVE 0
+
+#define DI_GENERAL 0x0000
+#define DI_BS_CLKGEN0 0x0004
+#define DI_BS_CLKGEN1 0x0008
+#define DI_SW_GEN0(gen) (0x000c + 4 * ((gen) - 1))
+#define DI_SW_GEN1(gen) (0x0030 + 4 * ((gen) - 1))
+#define DI_STP_REP(gen) (0x0148 + 4 * (((gen) - 1)/2))
+#define DI_SYNC_AS_GEN 0x0054
+#define DI_DW_GEN(gen) (0x0058 + 4 * (gen))
+#define DI_DW_SET(gen, set) (0x0088 + 4 * ((gen) + 0xc * (set)))
+#define DI_SER_CONF 0x015c
+#define DI_SSC 0x0160
+#define DI_POL 0x0164
+#define DI_AW0 0x0168
+#define DI_AW1 0x016c
+#define DI_SCR_CONF 0x0170
+#define DI_STAT 0x0174
+
+#define DI_SW_GEN0_RUN_COUNT(x) ((x) << 19)
+#define DI_SW_GEN0_RUN_SRC(x) ((x) << 16)
+#define DI_SW_GEN0_OFFSET_COUNT(x) ((x) << 3)
+#define DI_SW_GEN0_OFFSET_SRC(x) ((x) << 0)
+
+#define DI_SW_GEN1_CNT_POL_GEN_EN(x) ((x) << 29)
+#define DI_SW_GEN1_CNT_CLR_SRC(x) ((x) << 25)
+#define DI_SW_GEN1_CNT_POL_TRIGGER_SRC(x) ((x) << 12)
+#define DI_SW_GEN1_CNT_POL_CLR_SRC(x) ((x) << 9)
+#define DI_SW_GEN1_CNT_DOWN(x) ((x) << 16)
+#define DI_SW_GEN1_CNT_UP(x) (x)
+#define DI_SW_GEN1_AUTO_RELOAD (0x10000000)
+
+#define DI_DW_GEN_ACCESS_SIZE_OFFSET 24
+#define DI_DW_GEN_COMPONENT_SIZE_OFFSET 16
+
+#define DI_GEN_POLARITY_1 (1 << 0)
+#define DI_GEN_POLARITY_2 (1 << 1)
+#define DI_GEN_POLARITY_3 (1 << 2)
+#define DI_GEN_POLARITY_4 (1 << 3)
+#define DI_GEN_POLARITY_5 (1 << 4)
+#define DI_GEN_POLARITY_6 (1 << 5)
+#define DI_GEN_POLARITY_7 (1 << 6)
+#define DI_GEN_POLARITY_8 (1 << 7)
+#define DI_GEN_POLARITY_DISP_CLK (1 << 17)
+#define DI_GEN_DI_CLK_EXT (1 << 20)
+#define DI_GEN_DI_VSYNC_EXT (1 << 21)
+
+#define DI_POL_DRDY_DATA_POLARITY (1 << 7)
+#define DI_POL_DRDY_POLARITY_15 (1 << 4)
+
+#define DI_VSYNC_SEL_OFFSET 13
+
+static inline u32 ipu_di_read(struct ipu_di *di, unsigned offset)
+{
+ return readl(di->base + offset);
+}
+
+static inline void ipu_di_write(struct ipu_di *di, u32 value, unsigned offset)
+{
+ writel(value, di->base + offset);
+}
+
+static void ipu_di_data_wave_config(struct ipu_di *di,
+ int wave_gen,
+ int access_size, int component_size)
+{
+ u32 reg;
+ reg = (access_size << DI_DW_GEN_ACCESS_SIZE_OFFSET) |
+ (component_size << DI_DW_GEN_COMPONENT_SIZE_OFFSET);
+ ipu_di_write(di, reg, DI_DW_GEN(wave_gen));
+}
+
+static void ipu_di_data_pin_config(struct ipu_di *di, int wave_gen, int di_pin,
+ int set, int up, int down)
+{
+ u32 reg;
+
+ reg = ipu_di_read(di, DI_DW_GEN(wave_gen));
+ reg &= ~(0x3 << (di_pin * 2));
+ reg |= set << (di_pin * 2);
+ ipu_di_write(di, reg, DI_DW_GEN(wave_gen));
+
+ ipu_di_write(di, (down << 16) | up, DI_DW_SET(wave_gen, set));
+}
+
+static void ipu_di_sync_config(struct ipu_di *di, struct di_sync_config *config,
+ int start, int count)
+{
+ u32 reg;
+ int i;
+
+ for (i = 0; i < count; i++) {
+ struct di_sync_config *c = &config[i];
+ int wave_gen = start + i + 1;
+
+ if ((c->run_count >= 0x1000) || (c->offset_count >= 0x1000) ||
+ (c->repeat_count >= 0x1000) ||
+ (c->cnt_up >= 0x400) ||
+ (c->cnt_down >= 0x400)) {
+ dev_err(di->ipu->dev, "DI%d counters out of range.\n",
+ di->id);
+ return;
+ }
+
+ reg = DI_SW_GEN0_RUN_COUNT(c->run_count) |
+ DI_SW_GEN0_RUN_SRC(c->run_src) |
+ DI_SW_GEN0_OFFSET_COUNT(c->offset_count) |
+ DI_SW_GEN0_OFFSET_SRC(c->offset_src);
+ ipu_di_write(di, reg, DI_SW_GEN0(wave_gen));
+
+ reg = DI_SW_GEN1_CNT_POL_GEN_EN(c->cnt_polarity_gen_en) |
+ DI_SW_GEN1_CNT_CLR_SRC(c->cnt_clr_src) |
+ DI_SW_GEN1_CNT_POL_TRIGGER_SRC(
+ c->cnt_polarity_trigger_src) |
+ DI_SW_GEN1_CNT_POL_CLR_SRC(c->cnt_polarity_clr_src) |
+ DI_SW_GEN1_CNT_DOWN(c->cnt_down) |
+ DI_SW_GEN1_CNT_UP(c->cnt_up);
+
+ /* Enable auto reload */
+ if (c->repeat_count == 0)
+ reg |= DI_SW_GEN1_AUTO_RELOAD;
+
+ ipu_di_write(di, reg, DI_SW_GEN1(wave_gen));
+
+ reg = ipu_di_read(di, DI_STP_REP(wave_gen));
+ reg &= ~(0xffff << (16 * ((wave_gen - 1) & 0x1)));
+ reg |= c->repeat_count << (16 * ((wave_gen - 1) & 0x1));
+ ipu_di_write(di, reg, DI_STP_REP(wave_gen));
+ }
+}
+
+static void ipu_di_sync_config_interlaced(struct ipu_di *di,
+ struct ipu_di_signal_cfg *sig)
+{
+ u32 h_total = sig->mode.hactive + sig->mode.hsync_len +
+ sig->mode.hback_porch + sig->mode.hfront_porch;
+ u32 v_total = sig->mode.vactive + sig->mode.vsync_len +
+ sig->mode.vback_porch + sig->mode.vfront_porch;
+ struct di_sync_config cfg[] = {
+ {
+ /* 1: internal VSYNC for each frame */
+ .run_count = v_total * 2 - 1,
+ .run_src = 3, /* == counter 7 */
+ }, {
+ /* PIN2: HSYNC waveform */
+ .run_count = h_total - 1,
+ .run_src = DI_SYNC_CLK,
+ .cnt_polarity_gen_en = 1,
+ .cnt_polarity_trigger_src = DI_SYNC_CLK,
+ .cnt_down = sig->mode.hsync_len * 2,
+ }, {
+ /* PIN3: VSYNC waveform */
+ .run_count = v_total - 1,
+ .run_src = 4, /* == counter 7 */
+ .cnt_polarity_gen_en = 1,
+ .cnt_polarity_trigger_src = 4, /* == counter 7 */
+ .cnt_down = sig->mode.vsync_len * 2,
+ .cnt_clr_src = DI_SYNC_CNT1,
+ }, {
+ /* 4: Field */
+ .run_count = v_total / 2,
+ .run_src = DI_SYNC_HSYNC,
+ .offset_count = h_total / 2,
+ .offset_src = DI_SYNC_CLK,
+ .repeat_count = 2,
+ .cnt_clr_src = DI_SYNC_CNT1,
+ }, {
+ /* 5: Active lines */
+ .run_src = DI_SYNC_HSYNC,
+ .offset_count = (sig->mode.vsync_len +
+ sig->mode.vback_porch) / 2,
+ .offset_src = DI_SYNC_HSYNC,
+ .repeat_count = sig->mode.vactive / 2,
+ .cnt_clr_src = DI_SYNC_CNT4,
+ }, {
+ /* 6: Active pixel, referenced by DC */
+ .run_src = DI_SYNC_CLK,
+ .offset_count = sig->mode.hsync_len +
+ sig->mode.hback_porch,
+ .offset_src = DI_SYNC_CLK,
+ .repeat_count = sig->mode.hactive,
+ .cnt_clr_src = DI_SYNC_CNT5,
+ }, {
+ /* 7: Half line HSYNC */
+ .run_count = h_total / 2 - 1,
+ .run_src = DI_SYNC_CLK,
+ }
+ };
+
+ ipu_di_sync_config(di, cfg, 0, ARRAY_SIZE(cfg));
+
+ ipu_di_write(di, v_total / 2 - 1, DI_SCR_CONF);
+}
+
+static void ipu_di_sync_config_noninterlaced(struct ipu_di *di,
+ struct ipu_di_signal_cfg *sig, int div)
+{
+ u32 h_total = sig->mode.hactive + sig->mode.hsync_len +
+ sig->mode.hback_porch + sig->mode.hfront_porch;
+ u32 v_total = sig->mode.vactive + sig->mode.vsync_len +
+ sig->mode.vback_porch + sig->mode.vfront_porch;
+ struct di_sync_config cfg[] = {
+ {
+ /* 1: INT_HSYNC */
+ .run_count = h_total - 1,
+ .run_src = DI_SYNC_CLK,
+ } , {
+ /* PIN2: HSYNC */
+ .run_count = h_total - 1,
+ .run_src = DI_SYNC_CLK,
+ .offset_count = div * sig->v_to_h_sync,
+ .offset_src = DI_SYNC_CLK,
+ .cnt_polarity_gen_en = 1,
+ .cnt_polarity_trigger_src = DI_SYNC_CLK,
+ .cnt_down = sig->mode.hsync_len * 2,
+ } , {
+ /* PIN3: VSYNC */
+ .run_count = v_total - 1,
+ .run_src = DI_SYNC_INT_HSYNC,
+ .cnt_polarity_gen_en = 1,
+ .cnt_polarity_trigger_src = DI_SYNC_INT_HSYNC,
+ .cnt_down = sig->mode.vsync_len * 2,
+ } , {
+ /* 4: Line Active */
+ .run_src = DI_SYNC_HSYNC,
+ .offset_count = sig->mode.vsync_len +
+ sig->mode.vback_porch,
+ .offset_src = DI_SYNC_HSYNC,
+ .repeat_count = sig->mode.vactive,
+ .cnt_clr_src = DI_SYNC_VSYNC,
+ } , {
+ /* 5: Pixel Active, referenced by DC */
+ .run_src = DI_SYNC_CLK,
+ .offset_count = sig->mode.hsync_len +
+ sig->mode.hback_porch,
+ .offset_src = DI_SYNC_CLK,
+ .repeat_count = sig->mode.hactive,
+ .cnt_clr_src = 5, /* Line Active */
+ } , {
+ /* unused */
+ } , {
+ /* unused */
+ },
+ };
+ /* can't use #7 and #8 for line active and pixel active counters */
+ struct di_sync_config cfg_vga[] = {
+ {
+ /* 1: INT_HSYNC */
+ .run_count = h_total - 1,
+ .run_src = DI_SYNC_CLK,
+ } , {
+ /* 2: VSYNC */
+ .run_count = v_total - 1,
+ .run_src = DI_SYNC_INT_HSYNC,
+ } , {
+ /* 3: Line Active */
+ .run_src = DI_SYNC_INT_HSYNC,
+ .offset_count = sig->mode.vsync_len +
+ sig->mode.vback_porch,
+ .offset_src = DI_SYNC_INT_HSYNC,
+ .repeat_count = sig->mode.vactive,
+ .cnt_clr_src = 3 /* VSYNC */,
+ } , {
+ /* PIN4: HSYNC for VGA via TVEv2 on TQ MBa53 */
+ .run_count = h_total - 1,
+ .run_src = DI_SYNC_CLK,
+ .offset_count = div * sig->v_to_h_sync + 18, /* magic value from Freescale TVE driver */
+ .offset_src = DI_SYNC_CLK,
+ .cnt_polarity_gen_en = 1,
+ .cnt_polarity_trigger_src = DI_SYNC_CLK,
+ .cnt_down = sig->mode.hsync_len * 2,
+ } , {
+ /* 5: Pixel Active signal to DC */
+ .run_src = DI_SYNC_CLK,
+ .offset_count = sig->mode.hsync_len +
+ sig->mode.hback_porch,
+ .offset_src = DI_SYNC_CLK,
+ .repeat_count = sig->mode.hactive,
+ .cnt_clr_src = 4, /* Line Active */
+ } , {
+ /* PIN6: VSYNC for VGA via TVEv2 on TQ MBa53 */
+ .run_count = v_total - 1,
+ .run_src = DI_SYNC_INT_HSYNC,
+ .offset_count = 1, /* magic value from Freescale TVE driver */
+ .offset_src = DI_SYNC_INT_HSYNC,
+ .cnt_polarity_gen_en = 1,
+ .cnt_polarity_trigger_src = DI_SYNC_INT_HSYNC,
+ .cnt_down = sig->mode.vsync_len * 2,
+ } , {
+ /* PIN4: HSYNC for VGA via TVEv2 on i.MX53-QSB */
+ .run_count = h_total - 1,
+ .run_src = DI_SYNC_CLK,
+ .offset_count = div * sig->v_to_h_sync + 18, /* magic value from Freescale TVE driver */
+ .offset_src = DI_SYNC_CLK,
+ .cnt_polarity_gen_en = 1,
+ .cnt_polarity_trigger_src = DI_SYNC_CLK,
+ .cnt_down = sig->mode.hsync_len * 2,
+ } , {
+ /* PIN6: VSYNC for VGA via TVEv2 on i.MX53-QSB */
+ .run_count = v_total - 1,
+ .run_src = DI_SYNC_INT_HSYNC,
+ .offset_count = 1, /* magic value from Freescale TVE driver */
+ .offset_src = DI_SYNC_INT_HSYNC,
+ .cnt_polarity_gen_en = 1,
+ .cnt_polarity_trigger_src = DI_SYNC_INT_HSYNC,
+ .cnt_down = sig->mode.vsync_len * 2,
+ } , {
+ /* unused */
+ },
+ };
+
+ ipu_di_write(di, v_total - 1, DI_SCR_CONF);
+ if (sig->hsync_pin == 2 && sig->vsync_pin == 3)
+ ipu_di_sync_config(di, cfg, 0, ARRAY_SIZE(cfg));
+ else
+ ipu_di_sync_config(di, cfg_vga, 0, ARRAY_SIZE(cfg_vga));
+}
+
+static void ipu_di_config_clock(struct ipu_di *di,
+ const struct ipu_di_signal_cfg *sig)
+{
+ struct clk *clk;
+ unsigned clkgen0;
+ uint32_t val;
+
+ if (sig->clkflags & IPU_DI_CLKMODE_EXT) {
+ /*
+ * CLKMODE_EXT means we must use the DI clock: this is
+ * needed for things like LVDS which needs to feed the
+ * DI and LDB with the same pixel clock.
+ */
+ clk = di->clk_di;
+
+ if (sig->clkflags & IPU_DI_CLKMODE_SYNC) {
+ /*
+ * CLKMODE_SYNC means that we want the DI to be
+ * clocked at the same rate as the parent clock.
+ * This is needed (eg) for LDB which needs to be
+ * fed with the same pixel clock. We assume that
+ * the LDB clock has already been set correctly.
+ */
+ clkgen0 = 1 << 4;
+ } else {
+ /*
+ * We can use the divider. We should really have
+ * a flag here indicating whether the bridge can
+ * cope with a fractional divider or not. For the
+ * time being, let's go for simplicitly and
+ * reliability.
+ */
+ unsigned long in_rate;
+ unsigned div;
+
+ clk_set_rate(clk, sig->mode.pixelclock);
+
+ in_rate = clk_get_rate(clk);
+ div = DIV_ROUND_CLOSEST(in_rate, sig->mode.pixelclock);
+ div = clamp(div, 1U, 255U);
+
+ clkgen0 = div << 4;
+ }
+ } else {
+ /*
+ * For other interfaces, we can arbitarily select between
+ * the DI specific clock and the internal IPU clock. See
+ * DI_GENERAL bit 20. We select the IPU clock if it can
+ * give us a clock rate within 1% of the requested frequency,
+ * otherwise we use the DI clock.
+ */
+ unsigned long rate, clkrate;
+ unsigned div, error;
+
+ clkrate = clk_get_rate(di->clk_ipu);
+ div = DIV_ROUND_CLOSEST(clkrate, sig->mode.pixelclock);
+ div = clamp(div, 1U, 255U);
+ rate = clkrate / div;
+
+ error = rate / (sig->mode.pixelclock / 1000);
+
+ dev_dbg(di->ipu->dev, " IPU clock can give %lu with divider %u, error %c%d.%d%%\n",
+ rate, div, error < 1000 ? '-' : '+',
+ abs(error - 1000) / 10, abs(error - 1000) % 10);
+
+ /* Allow a 1% error */
+ if (error < 1010 && error >= 990) {
+ clk = di->clk_ipu;
+
+ clkgen0 = div << 4;
+ } else {
+ unsigned long in_rate;
+ unsigned div;
+
+ clk = di->clk_di;
+
+ clk_set_rate(clk, sig->mode.pixelclock);
+
+ in_rate = clk_get_rate(clk);
+ div = DIV_ROUND_CLOSEST(in_rate, sig->mode.pixelclock);
+ div = clamp(div, 1U, 255U);
+
+ clkgen0 = div << 4;
+ }
+ }
+
+ di->clk_di_pixel = clk;
+
+ /* Set the divider */
+ ipu_di_write(di, clkgen0, DI_BS_CLKGEN0);
+
+ /*
+ * Set the high/low periods. Bits 24:16 give us the falling edge,
+ * and bits 8:0 give the rising edge. LSB is fraction, and is
+ * based on the divider above. We want a 50% duty cycle, so set
+ * the falling edge to be half the divider.
+ */
+ ipu_di_write(di, (clkgen0 >> 4) << 16, DI_BS_CLKGEN1);
+
+ /* Finally select the input clock */
+ val = ipu_di_read(di, DI_GENERAL) & ~DI_GEN_DI_CLK_EXT;
+ if (clk == di->clk_di)
+ val |= DI_GEN_DI_CLK_EXT;
+ ipu_di_write(di, val, DI_GENERAL);
+
+ dev_dbg(di->ipu->dev, "Want %luHz IPU %luHz DI %luHz using %s, %luHz\n",
+ sig->mode.pixelclock,
+ clk_get_rate(di->clk_ipu),
+ clk_get_rate(di->clk_di),
+ clk == di->clk_di ? "DI" : "IPU",
+ clk_get_rate(di->clk_di_pixel) / (clkgen0 >> 4));
+}
+
+/*
+ * This function is called to adjust a video mode to IPU restrictions.
+ * It is meant to be called from drm crtc mode_fixup() methods.
+ */
+int ipu_di_adjust_videomode(struct ipu_di *di, struct videomode *mode)
+{
+ u32 diff;
+
+ if (!IS_ALIGNED(mode->hactive, 8) &&
+ mode->hfront_porch < ALIGN(mode->hactive, 8) - mode->hactive) {
+ dev_err(di->ipu->dev, "hactive %d is not aligned to 8 and front porch is too small to compensate\n",
+ mode->hactive);
+ return -EINVAL;
+ }
+
+ if (mode->vfront_porch >= 2)
+ return 0;
+
+ diff = 2 - mode->vfront_porch;
+
+ if (mode->vback_porch >= diff) {
+ mode->vfront_porch = 2;
+ mode->vback_porch -= diff;
+ } else if (mode->vsync_len > diff) {
+ mode->vfront_porch = 2;
+ mode->vsync_len = mode->vsync_len - diff;
+ } else {
+ dev_warn(di->ipu->dev, "failed to adjust videomode\n");
+ return -EINVAL;
+ }
+
+ dev_dbg(di->ipu->dev, "videomode adapted for IPU restrictions\n");
+ return 0;
+}
+EXPORT_SYMBOL_GPL(ipu_di_adjust_videomode);
+
+static u32 ipu_di_gen_polarity(int pin)
+{
+ switch (pin) {
+ case 1:
+ return DI_GEN_POLARITY_1;
+ case 2:
+ return DI_GEN_POLARITY_2;
+ case 3:
+ return DI_GEN_POLARITY_3;
+ case 4:
+ return DI_GEN_POLARITY_4;
+ case 5:
+ return DI_GEN_POLARITY_5;
+ case 6:
+ return DI_GEN_POLARITY_6;
+ case 7:
+ return DI_GEN_POLARITY_7;
+ case 8:
+ return DI_GEN_POLARITY_8;
+ }
+ return 0;
+}
+
+int ipu_di_init_sync_panel(struct ipu_di *di, struct ipu_di_signal_cfg *sig)
+{
+ u32 reg;
+ u32 di_gen, vsync_cnt;
+ u32 div;
+
+ dev_dbg(di->ipu->dev, "disp %d: panel size = %d x %d\n",
+ di->id, sig->mode.hactive, sig->mode.vactive);
+
+ dev_dbg(di->ipu->dev, "Clocks: IPU %luHz DI %luHz Needed %luHz\n",
+ clk_get_rate(di->clk_ipu),
+ clk_get_rate(di->clk_di),
+ sig->mode.pixelclock);
+
+ mutex_lock(&di_mutex);
+
+ ipu_di_config_clock(di, sig);
+
+ div = ipu_di_read(di, DI_BS_CLKGEN0) & 0xfff;
+ div = div / 16; /* Now divider is integer portion */
+
+ /* Setup pixel clock timing */
+ /* Down time is half of period */
+ ipu_di_write(di, (div << 16), DI_BS_CLKGEN1);
+
+ ipu_di_data_wave_config(di, SYNC_WAVE, div - 1, div - 1);
+ ipu_di_data_pin_config(di, SYNC_WAVE, DI_PIN15, 3, 0, div * 2);
+
+ di_gen = ipu_di_read(di, DI_GENERAL) & DI_GEN_DI_CLK_EXT;
+ di_gen |= DI_GEN_DI_VSYNC_EXT;
+
+ if (sig->mode.flags & DISPLAY_FLAGS_INTERLACED) {
+ ipu_di_sync_config_interlaced(di, sig);
+
+ /* set y_sel = 1 */
+ di_gen |= 0x10000000;
+
+ vsync_cnt = 3;
+ } else {
+ ipu_di_sync_config_noninterlaced(di, sig, div);
+
+ vsync_cnt = 3;
+ if (di->id == 1)
+ /*
+ * TODO: change only for TVEv2, parallel display
+ * uses pin 2 / 3
+ */
+ if (!(sig->hsync_pin == 2 && sig->vsync_pin == 3))
+ vsync_cnt = 6;
+ }
+
+ if (sig->mode.flags & DISPLAY_FLAGS_HSYNC_HIGH)
+ di_gen |= ipu_di_gen_polarity(sig->hsync_pin);
+ if (sig->mode.flags & DISPLAY_FLAGS_VSYNC_HIGH)
+ di_gen |= ipu_di_gen_polarity(sig->vsync_pin);
+
+ if (sig->clk_pol)
+ di_gen |= DI_GEN_POLARITY_DISP_CLK;
+
+ ipu_di_write(di, di_gen, DI_GENERAL);
+
+ ipu_di_write(di, (--vsync_cnt << DI_VSYNC_SEL_OFFSET) | 0x00000002,
+ DI_SYNC_AS_GEN);
+
+ reg = ipu_di_read(di, DI_POL);
+ reg &= ~(DI_POL_DRDY_DATA_POLARITY | DI_POL_DRDY_POLARITY_15);
+
+ if (sig->enable_pol)
+ reg |= DI_POL_DRDY_POLARITY_15;
+ if (sig->data_pol)
+ reg |= DI_POL_DRDY_DATA_POLARITY;
+
+ ipu_di_write(di, reg, DI_POL);
+
+ mutex_unlock(&di_mutex);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(ipu_di_init_sync_panel);
+
+int ipu_di_enable(struct ipu_di *di)
+{
+ int ret;
+
+ WARN_ON(IS_ERR(di->clk_di_pixel));
+
+ ret = clk_prepare_enable(di->clk_di_pixel);
+ if (ret)
+ return ret;
+
+ ipu_module_enable(di->ipu, di->module);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(ipu_di_enable);
+
+int ipu_di_disable(struct ipu_di *di)
+{
+ WARN_ON(IS_ERR(di->clk_di_pixel));
+
+ ipu_module_disable(di->ipu, di->module);
+
+ clk_disable_unprepare(di->clk_di_pixel);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(ipu_di_disable);
+
+int ipu_di_get_num(struct ipu_di *di)
+{
+ return di->id;
+}
+EXPORT_SYMBOL_GPL(ipu_di_get_num);
+
+static DEFINE_MUTEX(ipu_di_lock);
+
+struct ipu_di *ipu_di_get(struct ipu_soc *ipu, int disp)
+{
+ struct ipu_di *di;
+
+ if (disp > 1)
+ return ERR_PTR(-EINVAL);
+
+ di = ipu->di_priv[disp];
+
+ mutex_lock(&ipu_di_lock);
+
+ if (di->inuse) {
+ di = ERR_PTR(-EBUSY);
+ goto out;
+ }
+
+ di->inuse = true;
+out:
+ mutex_unlock(&ipu_di_lock);
+
+ return di;
+}
+EXPORT_SYMBOL_GPL(ipu_di_get);
+
+void ipu_di_put(struct ipu_di *di)
+{
+ mutex_lock(&ipu_di_lock);
+
+ di->inuse = false;
+
+ mutex_unlock(&ipu_di_lock);
+}
+EXPORT_SYMBOL_GPL(ipu_di_put);
+
+int ipu_di_init(struct ipu_soc *ipu, struct device *dev, int id,
+ unsigned long base,
+ u32 module, struct clk *clk_ipu)
+{
+ struct ipu_di *di;
+
+ if (id > 1)
+ return -ENODEV;
+
+ di = devm_kzalloc(dev, sizeof(*di), GFP_KERNEL);
+ if (!di)
+ return -ENOMEM;
+
+ ipu->di_priv[id] = di;
+
+ di->clk_di = devm_clk_get(dev, id ? "di1" : "di0");
+ if (IS_ERR(di->clk_di))
+ return PTR_ERR(di->clk_di);
+
+ di->module = module;
+ di->id = id;
+ di->clk_ipu = clk_ipu;
+ di->base = devm_ioremap(dev, base, PAGE_SIZE);
+ if (!di->base)
+ return -ENOMEM;
+
+ ipu_di_write(di, 0x10, DI_BS_CLKGEN0);
+
+ dev_dbg(dev, "DI%d base: 0x%08lx remapped to %p\n",
+ id, base, di->base);
+ di->inuse = false;
+ di->ipu = ipu;
+
+ return 0;
+}
+
+void ipu_di_exit(struct ipu_soc *ipu, int id)
+{
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-23 13:31:54 +0000