summaryrefslogtreecommitdiff
path: root/drivers/gpu/ipu-v3/ipu-dc.c
diff options
context:
space:
mode:
authorDave Airlie <airlied@redhat.com>2014-06-11 10:13:58 +1000
committerDave Airlie <airlied@redhat.com>2014-06-11 10:13:58 +1000
commitc1a6e9fe82b46159af8cc4cf34fb51ee47862f05 (patch)
tree9ef7fc8fa3483dc7dc92034162118526a5d4377a /drivers/gpu/ipu-v3/ipu-dc.c
parentb06c47a13c52cec01902d0094fdd7f78f4d54152 (diff)
parentd6ca8ca7ec555bdd3372687d0d775c837a09ff6e (diff)
Merge branch 'topic/ipu-destaging' of git://git.pengutronix.de/git/pza/linux into drm-next
Destage IPUv3 * 'topic/ipu-destaging' of git://git.pengutronix.de/git/pza/linux: gpu: ipu-v3: Register the CSI modules gpu: ipu-v3: Add CSI and SMFC module enable wrappers gpu: ipu-v3: Add ipu_idmac_get_current_buffer function gpu: ipu-v3: Add SMFC code gpu: ipu-v3: Move i.MX IPUv3 core driver out of staging
Diffstat (limited to 'drivers/gpu/ipu-v3/ipu-dc.c')
-rw-r--r--drivers/gpu/ipu-v3/ipu-dc.c411
1 files changed, 411 insertions, 0 deletions
diff --git a/drivers/gpu/ipu-v3/ipu-dc.c b/drivers/gpu/ipu-v3/ipu-dc.c
new file mode 100644
index 000000000000..9f1e5efa3acf
--- /dev/null
+++ b/drivers/gpu/ipu-v3/ipu-dc.c
@@ -0,0 +1,411 @@
+/*
+ * Copyright (c) 2010 Sascha Hauer <s.hauer@pengutronix.de>
+ * Copyright (C) 2005-2009 Freescale Semiconductor, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * for more details.
+ */
+
+#include <linux/export.h>
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/errno.h>
+#include <linux/delay.h>
+#include <linux/io.h>
+
+#include <video/imx-ipu-v3.h>
+#include "ipu-prv.h"
+
+#define DC_MAP_CONF_PTR(n) (0x108 + ((n) & ~0x1) * 2)
+#define DC_MAP_CONF_VAL(n) (0x144 + ((n) & ~0x1) * 2)
+
+#define DC_EVT_NF 0
+#define DC_EVT_NL 1
+#define DC_EVT_EOF 2
+#define DC_EVT_NFIELD 3
+#define DC_EVT_EOL 4
+#define DC_EVT_EOFIELD 5
+#define DC_EVT_NEW_ADDR 6
+#define DC_EVT_NEW_CHAN 7
+#define DC_EVT_NEW_DATA 8
+
+#define DC_EVT_NEW_ADDR_W_0 0
+#define DC_EVT_NEW_ADDR_W_1 1
+#define DC_EVT_NEW_CHAN_W_0 2
+#define DC_EVT_NEW_CHAN_W_1 3
+#define DC_EVT_NEW_DATA_W_0 4
+#define DC_EVT_NEW_DATA_W_1 5
+#define DC_EVT_NEW_ADDR_R_0 6
+#define DC_EVT_NEW_ADDR_R_1 7
+#define DC_EVT_NEW_CHAN_R_0 8
+#define DC_EVT_NEW_CHAN_R_1 9
+#define DC_EVT_NEW_DATA_R_0 10
+#define DC_EVT_NEW_DATA_R_1 11
+
+#define DC_WR_CH_CONF 0x0
+#define DC_WR_CH_ADDR 0x4
+#define DC_RL_CH(evt) (8 + ((evt) & ~0x1) * 2)
+
+#define DC_GEN 0xd4
+#define DC_DISP_CONF1(disp) (0xd8 + (disp) * 4)
+#define DC_DISP_CONF2(disp) (0xe8 + (disp) * 4)
+#define DC_STAT 0x1c8
+
+#define WROD(lf) (0x18 | ((lf) << 1))
+#define WRG 0x01
+#define WCLK 0xc9
+
+#define SYNC_WAVE 0
+#define NULL_WAVE (-1)
+
+#define DC_GEN_SYNC_1_6_SYNC (2 << 1)
+#define DC_GEN_SYNC_PRIORITY_1 (1 << 7)
+
+#define DC_WR_CH_CONF_WORD_SIZE_8 (0 << 0)
+#define DC_WR_CH_CONF_WORD_SIZE_16 (1 << 0)
+#define DC_WR_CH_CONF_WORD_SIZE_24 (2 << 0)
+#define DC_WR_CH_CONF_WORD_SIZE_32 (3 << 0)
+#define DC_WR_CH_CONF_DISP_ID_PARALLEL(i) (((i) & 0x1) << 3)
+#define DC_WR_CH_CONF_DISP_ID_SERIAL (2 << 3)
+#define DC_WR_CH_CONF_DISP_ID_ASYNC (3 << 4)
+#define DC_WR_CH_CONF_FIELD_MODE (1 << 9)
+#define DC_WR_CH_CONF_PROG_TYPE_NORMAL (4 << 5)
+#define DC_WR_CH_CONF_PROG_TYPE_MASK (7 << 5)
+#define DC_WR_CH_CONF_PROG_DI_ID (1 << 2)
+#define DC_WR_CH_CONF_PROG_DISP_ID(i) (((i) & 0x1) << 3)
+
+#define IPU_DC_NUM_CHANNELS 10
+
+struct ipu_dc_priv;
+
+enum ipu_dc_map {
+ IPU_DC_MAP_RGB24,
+ IPU_DC_MAP_RGB565,
+ IPU_DC_MAP_GBR24, /* TVEv2 */
+ IPU_DC_MAP_BGR666,
+ IPU_DC_MAP_BGR24,
+};
+
+struct ipu_dc {
+ /* The display interface number assigned to this dc channel */
+ unsigned int di;
+ void __iomem *base;
+ struct ipu_dc_priv *priv;
+ int chno;
+ bool in_use;
+};
+
+struct ipu_dc_priv {
+ void __iomem *dc_reg;
+ void __iomem *dc_tmpl_reg;
+ struct ipu_soc *ipu;
+ struct device *dev;
+ struct ipu_dc channels[IPU_DC_NUM_CHANNELS];
+ struct mutex mutex;
+};
+
+static void dc_link_event(struct ipu_dc *dc, int event, int addr, int priority)
+{
+ u32 reg;
+
+ reg = readl(dc->base + DC_RL_CH(event));
+ reg &= ~(0xffff << (16 * (event & 0x1)));
+ reg |= ((addr << 8) | priority) << (16 * (event & 0x1));
+ writel(reg, dc->base + DC_RL_CH(event));
+}
+
+static void dc_write_tmpl(struct ipu_dc *dc, int word, u32 opcode, u32 operand,
+ int map, int wave, int glue, int sync, int stop)
+{
+ struct ipu_dc_priv *priv = dc->priv;
+ u32 reg1, reg2;
+
+ if (opcode == WCLK) {
+ reg1 = (operand << 20) & 0xfff00000;
+ reg2 = operand >> 12 | opcode << 1 | stop << 9;
+ } else if (opcode == WRG) {
+ reg1 = sync | glue << 4 | ++wave << 11 | ((operand << 15) & 0xffff8000);
+ reg2 = operand >> 17 | opcode << 7 | stop << 9;
+ } else {
+ reg1 = sync | glue << 4 | ++wave << 11 | ++map << 15 | ((operand << 20) & 0xfff00000);
+ reg2 = operand >> 12 | opcode << 4 | stop << 9;
+ }
+ writel(reg1, priv->dc_tmpl_reg + word * 8);
+ writel(reg2, priv->dc_tmpl_reg + word * 8 + 4);
+}
+
+static int ipu_pixfmt_to_map(u32 fmt)
+{
+ switch (fmt) {
+ case V4L2_PIX_FMT_RGB24:
+ return IPU_DC_MAP_RGB24;
+ case V4L2_PIX_FMT_RGB565:
+ return IPU_DC_MAP_RGB565;
+ case IPU_PIX_FMT_GBR24:
+ return IPU_DC_MAP_GBR24;
+ case V4L2_PIX_FMT_BGR666:
+ return IPU_DC_MAP_BGR666;
+ case V4L2_PIX_FMT_BGR24:
+ return IPU_DC_MAP_BGR24;
+ default:
+ return -EINVAL;
+ }
+}
+
+int ipu_dc_init_sync(struct ipu_dc *dc, struct ipu_di *di, bool interlaced,
+ u32 pixel_fmt, u32 width)
+{
+ struct ipu_dc_priv *priv = dc->priv;
+ u32 reg = 0;
+ int map;
+
+ dc->di = ipu_di_get_num(di);
+
+ map = ipu_pixfmt_to_map(pixel_fmt);
+ if (map < 0) {
+ dev_dbg(priv->dev, "IPU_DISP: No MAP\n");
+ return map;
+ }
+
+ if (interlaced) {
+ dc_link_event(dc, DC_EVT_NL, 0, 3);
+ dc_link_event(dc, DC_EVT_EOL, 0, 2);
+ dc_link_event(dc, DC_EVT_NEW_DATA, 0, 1);
+
+ /* Init template microcode */
+ dc_write_tmpl(dc, 0, WROD(0), 0, map, SYNC_WAVE, 0, 8, 1);
+ } else {
+ if (dc->di) {
+ dc_link_event(dc, DC_EVT_NL, 2, 3);
+ dc_link_event(dc, DC_EVT_EOL, 3, 2);
+ dc_link_event(dc, DC_EVT_NEW_DATA, 1, 1);
+ /* Init template microcode */
+ dc_write_tmpl(dc, 2, WROD(0), 0, map, SYNC_WAVE, 8, 5, 1);
+ dc_write_tmpl(dc, 3, WROD(0), 0, map, SYNC_WAVE, 4, 5, 0);
+ dc_write_tmpl(dc, 4, WRG, 0, map, NULL_WAVE, 0, 0, 1);
+ dc_write_tmpl(dc, 1, WROD(0), 0, map, SYNC_WAVE, 0, 5, 1);
+ } else {
+ dc_link_event(dc, DC_EVT_NL, 5, 3);
+ dc_link_event(dc, DC_EVT_EOL, 6, 2);
+ dc_link_event(dc, DC_EVT_NEW_DATA, 8, 1);
+ /* Init template microcode */
+ dc_write_tmpl(dc, 5, WROD(0), 0, map, SYNC_WAVE, 8, 5, 1);
+ dc_write_tmpl(dc, 6, WROD(0), 0, map, SYNC_WAVE, 4, 5, 0);
+ dc_write_tmpl(dc, 7, WRG, 0, map, NULL_WAVE, 0, 0, 1);
+ dc_write_tmpl(dc, 8, WROD(0), 0, map, SYNC_WAVE, 0, 5, 1);
+ }
+ }
+ dc_link_event(dc, DC_EVT_NF, 0, 0);
+ dc_link_event(dc, DC_EVT_NFIELD, 0, 0);
+ dc_link_event(dc, DC_EVT_EOF, 0, 0);
+ dc_link_event(dc, DC_EVT_EOFIELD, 0, 0);
+ dc_link_event(dc, DC_EVT_NEW_CHAN, 0, 0);
+ dc_link_event(dc, DC_EVT_NEW_ADDR, 0, 0);
+
+ reg = readl(dc->base + DC_WR_CH_CONF);
+ if (interlaced)
+ reg |= DC_WR_CH_CONF_FIELD_MODE;
+ else
+ reg &= ~DC_WR_CH_CONF_FIELD_MODE;
+ writel(reg, dc->base + DC_WR_CH_CONF);
+
+ writel(0x0, dc->base + DC_WR_CH_ADDR);
+ writel(width, priv->dc_reg + DC_DISP_CONF2(dc->di));
+
+ ipu_module_enable(priv->ipu, IPU_CONF_DC_EN);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(ipu_dc_init_sync);
+
+void ipu_dc_enable_channel(struct ipu_dc *dc)
+{
+ int di;
+ u32 reg;
+
+ di = dc->di;
+
+ reg = readl(dc->base + DC_WR_CH_CONF);
+ reg |= DC_WR_CH_CONF_PROG_TYPE_NORMAL;
+ writel(reg, dc->base + DC_WR_CH_CONF);
+}
+EXPORT_SYMBOL_GPL(ipu_dc_enable_channel);
+
+void ipu_dc_disable_channel(struct ipu_dc *dc)
+{
+ struct ipu_dc_priv *priv = dc->priv;
+ u32 val;
+ int irq = 0, timeout = 50;
+
+ if (dc->chno == 1)
+ irq = IPU_IRQ_DC_FC_1;
+ else if (dc->chno == 5)
+ irq = IPU_IRQ_DP_SF_END;
+ else
+ return;
+
+ /* should wait for the interrupt here */
+ mdelay(50);
+
+ if (dc->di == 0)
+ val = 0x00000002;
+ else
+ val = 0x00000020;
+
+ /* Wait for DC triple buffer to empty */
+ while ((readl(priv->dc_reg + DC_STAT) & val) != val) {
+ usleep_range(2000, 20000);
+ timeout -= 2;
+ if (timeout <= 0)
+ break;
+ }
+
+ val = readl(dc->base + DC_WR_CH_CONF);
+ val &= ~DC_WR_CH_CONF_PROG_TYPE_MASK;
+ writel(val, dc->base + DC_WR_CH_CONF);
+}
+EXPORT_SYMBOL_GPL(ipu_dc_disable_channel);
+
+static void ipu_dc_map_config(struct ipu_dc_priv *priv, enum ipu_dc_map map,
+ int byte_num, int offset, int mask)
+{
+ int ptr = map * 3 + byte_num;
+ u32 reg;
+
+ reg = readl(priv->dc_reg + DC_MAP_CONF_VAL(ptr));
+ reg &= ~(0xffff << (16 * (ptr & 0x1)));
+ reg |= ((offset << 8) | mask) << (16 * (ptr & 0x1));
+ writel(reg, priv->dc_reg + DC_MAP_CONF_VAL(ptr));
+
+ reg = readl(priv->dc_reg + DC_MAP_CONF_PTR(map));
+ reg &= ~(0x1f << ((16 * (map & 0x1)) + (5 * byte_num)));
+ reg |= ptr << ((16 * (map & 0x1)) + (5 * byte_num));
+ writel(reg, priv->dc_reg + DC_MAP_CONF_PTR(map));
+}
+
+static void ipu_dc_map_clear(struct ipu_dc_priv *priv, int map)
+{
+ u32 reg = readl(priv->dc_reg + DC_MAP_CONF_PTR(map));
+
+ writel(reg & ~(0xffff << (16 * (map & 0x1))),
+ priv->dc_reg + DC_MAP_CONF_PTR(map));
+}
+
+struct ipu_dc *ipu_dc_get(struct ipu_soc *ipu, int channel)
+{
+ struct ipu_dc_priv *priv = ipu->dc_priv;
+ struct ipu_dc *dc;
+
+ if (channel >= IPU_DC_NUM_CHANNELS)
+ return ERR_PTR(-ENODEV);
+
+ dc = &priv->channels[channel];
+
+ mutex_lock(&priv->mutex);
+
+ if (dc->in_use) {
+ mutex_unlock(&priv->mutex);
+ return ERR_PTR(-EBUSY);
+ }
+
+ dc->in_use = true;
+
+ mutex_unlock(&priv->mutex);
+
+ return dc;
+}
+EXPORT_SYMBOL_GPL(ipu_dc_get);
+
+void ipu_dc_put(struct ipu_dc *dc)
+{
+ struct ipu_dc_priv *priv = dc->priv;
+
+ mutex_lock(&priv->mutex);
+ dc->in_use = false;
+ mutex_unlock(&priv->mutex);
+}
+EXPORT_SYMBOL_GPL(ipu_dc_put);
+
+int ipu_dc_init(struct ipu_soc *ipu, struct device *dev,
+ unsigned long base, unsigned long template_base)
+{
+ struct ipu_dc_priv *priv;
+ static int channel_offsets[] = { 0, 0x1c, 0x38, 0x54, 0x58, 0x5c,
+ 0x78, 0, 0x94, 0xb4};
+ int i;
+
+ priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ mutex_init(&priv->mutex);
+
+ priv->dev = dev;
+ priv->ipu = ipu;
+ priv->dc_reg = devm_ioremap(dev, base, PAGE_SIZE);
+ priv->dc_tmpl_reg = devm_ioremap(dev, template_base, PAGE_SIZE);
+ if (!priv->dc_reg || !priv->dc_tmpl_reg)
+ return -ENOMEM;
+
+ for (i = 0; i < IPU_DC_NUM_CHANNELS; i++) {
+ priv->channels[i].chno = i;
+ priv->channels[i].priv = priv;
+ priv->channels[i].base = priv->dc_reg + channel_offsets[i];
+ }
+
+ writel(DC_WR_CH_CONF_WORD_SIZE_24 | DC_WR_CH_CONF_DISP_ID_PARALLEL(1) |
+ DC_WR_CH_CONF_PROG_DI_ID,
+ priv->channels[1].base + DC_WR_CH_CONF);
+ writel(DC_WR_CH_CONF_WORD_SIZE_24 | DC_WR_CH_CONF_DISP_ID_PARALLEL(0),
+ priv->channels[5].base + DC_WR_CH_CONF);
+
+ writel(DC_GEN_SYNC_1_6_SYNC | DC_GEN_SYNC_PRIORITY_1, priv->dc_reg + DC_GEN);
+
+ ipu->dc_priv = priv;
+
+ dev_dbg(dev, "DC base: 0x%08lx template base: 0x%08lx\n",
+ base, template_base);
+
+ /* rgb24 */
+ ipu_dc_map_clear(priv, IPU_DC_MAP_RGB24);
+ ipu_dc_map_config(priv, IPU_DC_MAP_RGB24, 0, 7, 0xff); /* blue */
+ ipu_dc_map_config(priv, IPU_DC_MAP_RGB24, 1, 15, 0xff); /* green */
+ ipu_dc_map_config(priv, IPU_DC_MAP_RGB24, 2, 23, 0xff); /* red */
+
+ /* rgb565 */
+ ipu_dc_map_clear(priv, IPU_DC_MAP_RGB565);
+ ipu_dc_map_config(priv, IPU_DC_MAP_RGB565, 0, 4, 0xf8); /* blue */
+ ipu_dc_map_config(priv, IPU_DC_MAP_RGB565, 1, 10, 0xfc); /* green */
+ ipu_dc_map_config(priv, IPU_DC_MAP_RGB565, 2, 15, 0xf8); /* red */
+
+ /* gbr24 */
+ ipu_dc_map_clear(priv, IPU_DC_MAP_GBR24);
+ ipu_dc_map_config(priv, IPU_DC_MAP_GBR24, 2, 15, 0xff); /* green */
+ ipu_dc_map_config(priv, IPU_DC_MAP_GBR24, 1, 7, 0xff); /* blue */
+ ipu_dc_map_config(priv, IPU_DC_MAP_GBR24, 0, 23, 0xff); /* red */
+
+ /* bgr666 */
+ ipu_dc_map_clear(priv, IPU_DC_MAP_BGR666);
+ ipu_dc_map_config(priv, IPU_DC_MAP_BGR666, 0, 5, 0xfc); /* blue */
+ ipu_dc_map_config(priv, IPU_DC_MAP_BGR666, 1, 11, 0xfc); /* green */
+ ipu_dc_map_config(priv, IPU_DC_MAP_BGR666, 2, 17, 0xfc); /* red */
+
+ /* bgr24 */
+ ipu_dc_map_clear(priv, IPU_DC_MAP_BGR24);
+ ipu_dc_map_config(priv, IPU_DC_MAP_BGR24, 2, 7, 0xff); /* red */
+ ipu_dc_map_config(priv, IPU_DC_MAP_BGR24, 1, 15, 0xff); /* green */
+ ipu_dc_map_config(priv, IPU_DC_MAP_BGR24, 0, 23, 0xff); /* blue */
+
+ return 0;
+}
+
+void ipu_dc_exit(struct ipu_soc *ipu)
+{
+}