diff options
Diffstat (limited to 'drivers/staging/imx-drm/imx-ldb.c')
-rw-r--r-- | drivers/staging/imx-drm/imx-ldb.c | 615 |
1 files changed, 0 insertions, 615 deletions
diff --git a/drivers/staging/imx-drm/imx-ldb.c b/drivers/staging/imx-drm/imx-ldb.c deleted file mode 100644 index 2638dc1671d0..000000000000 --- a/drivers/staging/imx-drm/imx-ldb.c +++ /dev/null @@ -1,615 +0,0 @@ -/* - * i.MX drm driver - LVDS display bridge - * - * Copyright (C) 2012 Sascha Hauer, Pengutronix - * - * 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. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, - * MA 02110-1301, USA. - */ - -#include <linux/module.h> -#include <linux/clk.h> -#include <linux/component.h> -#include <drm/drmP.h> -#include <drm/drm_fb_helper.h> -#include <drm/drm_crtc_helper.h> -#include <linux/mfd/syscon.h> -#include <linux/mfd/syscon/imx6q-iomuxc-gpr.h> -#include <linux/of_address.h> -#include <linux/of_device.h> -#include <video/of_videomode.h> -#include <linux/regmap.h> -#include <linux/videodev2.h> - -#include "imx-drm.h" - -#define DRIVER_NAME "imx-ldb" - -#define LDB_CH0_MODE_EN_TO_DI0 (1 << 0) -#define LDB_CH0_MODE_EN_TO_DI1 (3 << 0) -#define LDB_CH0_MODE_EN_MASK (3 << 0) -#define LDB_CH1_MODE_EN_TO_DI0 (1 << 2) -#define LDB_CH1_MODE_EN_TO_DI1 (3 << 2) -#define LDB_CH1_MODE_EN_MASK (3 << 2) -#define LDB_SPLIT_MODE_EN (1 << 4) -#define LDB_DATA_WIDTH_CH0_24 (1 << 5) -#define LDB_BIT_MAP_CH0_JEIDA (1 << 6) -#define LDB_DATA_WIDTH_CH1_24 (1 << 7) -#define LDB_BIT_MAP_CH1_JEIDA (1 << 8) -#define LDB_DI0_VS_POL_ACT_LOW (1 << 9) -#define LDB_DI1_VS_POL_ACT_LOW (1 << 10) -#define LDB_BGREF_RMODE_INT (1 << 15) - -#define con_to_imx_ldb_ch(x) container_of(x, struct imx_ldb_channel, connector) -#define enc_to_imx_ldb_ch(x) container_of(x, struct imx_ldb_channel, encoder) - -struct imx_ldb; - -struct imx_ldb_channel { - struct imx_ldb *ldb; - struct drm_connector connector; - struct drm_encoder encoder; - struct device_node *child; - int chno; - void *edid; - int edid_len; - struct drm_display_mode mode; - int mode_valid; -}; - -struct bus_mux { - int reg; - int shift; - int mask; -}; - -struct imx_ldb { - struct regmap *regmap; - struct device *dev; - struct imx_ldb_channel channel[2]; - struct clk *clk[2]; /* our own clock */ - struct clk *clk_sel[4]; /* parent of display clock */ - struct clk *clk_pll[2]; /* upstream clock we can adjust */ - u32 ldb_ctrl; - const struct bus_mux *lvds_mux; -}; - -static enum drm_connector_status imx_ldb_connector_detect( - struct drm_connector *connector, bool force) -{ - return connector_status_connected; -} - -static int imx_ldb_connector_get_modes(struct drm_connector *connector) -{ - struct imx_ldb_channel *imx_ldb_ch = con_to_imx_ldb_ch(connector); - int num_modes = 0; - - if (imx_ldb_ch->edid) { - drm_mode_connector_update_edid_property(connector, - imx_ldb_ch->edid); - num_modes = drm_add_edid_modes(connector, imx_ldb_ch->edid); - } - - if (imx_ldb_ch->mode_valid) { - struct drm_display_mode *mode; - - mode = drm_mode_create(connector->dev); - if (!mode) - return -EINVAL; - drm_mode_copy(mode, &imx_ldb_ch->mode); - mode->type |= DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED; - drm_mode_probed_add(connector, mode); - num_modes++; - } - - return num_modes; -} - -static struct drm_encoder *imx_ldb_connector_best_encoder( - struct drm_connector *connector) -{ - struct imx_ldb_channel *imx_ldb_ch = con_to_imx_ldb_ch(connector); - - return &imx_ldb_ch->encoder; -} - -static void imx_ldb_encoder_dpms(struct drm_encoder *encoder, int mode) -{ -} - -static bool imx_ldb_encoder_mode_fixup(struct drm_encoder *encoder, - const struct drm_display_mode *mode, - struct drm_display_mode *adjusted_mode) -{ - return true; -} - -static void imx_ldb_set_clock(struct imx_ldb *ldb, int mux, int chno, - unsigned long serial_clk, unsigned long di_clk) -{ - int ret; - - dev_dbg(ldb->dev, "%s: now: %ld want: %ld\n", __func__, - clk_get_rate(ldb->clk_pll[chno]), serial_clk); - clk_set_rate(ldb->clk_pll[chno], serial_clk); - - dev_dbg(ldb->dev, "%s after: %ld\n", __func__, - clk_get_rate(ldb->clk_pll[chno])); - - dev_dbg(ldb->dev, "%s: now: %ld want: %ld\n", __func__, - clk_get_rate(ldb->clk[chno]), - (long int)di_clk); - clk_set_rate(ldb->clk[chno], di_clk); - - dev_dbg(ldb->dev, "%s after: %ld\n", __func__, - clk_get_rate(ldb->clk[chno])); - - /* set display clock mux to LDB input clock */ - ret = clk_set_parent(ldb->clk_sel[mux], ldb->clk[chno]); - if (ret) - dev_err(ldb->dev, - "unable to set di%d parent clock to ldb_di%d\n", mux, - chno); -} - -static void imx_ldb_encoder_prepare(struct drm_encoder *encoder) -{ - struct imx_ldb_channel *imx_ldb_ch = enc_to_imx_ldb_ch(encoder); - struct imx_ldb *ldb = imx_ldb_ch->ldb; - struct drm_display_mode *mode = &encoder->crtc->mode; - u32 pixel_fmt; - unsigned long serial_clk; - unsigned long di_clk = mode->clock * 1000; - int mux = imx_drm_encoder_get_mux_id(imx_ldb_ch->child, encoder); - - if (ldb->ldb_ctrl & LDB_SPLIT_MODE_EN) { - /* dual channel LVDS mode */ - serial_clk = 3500UL * mode->clock; - imx_ldb_set_clock(ldb, mux, 0, serial_clk, di_clk); - imx_ldb_set_clock(ldb, mux, 1, serial_clk, di_clk); - } else { - serial_clk = 7000UL * mode->clock; - imx_ldb_set_clock(ldb, mux, imx_ldb_ch->chno, serial_clk, - di_clk); - } - - switch (imx_ldb_ch->chno) { - case 0: - pixel_fmt = (ldb->ldb_ctrl & LDB_DATA_WIDTH_CH0_24) ? - V4L2_PIX_FMT_RGB24 : V4L2_PIX_FMT_BGR666; - break; - case 1: - pixel_fmt = (ldb->ldb_ctrl & LDB_DATA_WIDTH_CH1_24) ? - V4L2_PIX_FMT_RGB24 : V4L2_PIX_FMT_BGR666; - break; - default: - dev_err(ldb->dev, "unable to config di%d panel format\n", - imx_ldb_ch->chno); - pixel_fmt = V4L2_PIX_FMT_RGB24; - } - - imx_drm_panel_format(encoder, pixel_fmt); -} - -static void imx_ldb_encoder_commit(struct drm_encoder *encoder) -{ - struct imx_ldb_channel *imx_ldb_ch = enc_to_imx_ldb_ch(encoder); - struct imx_ldb *ldb = imx_ldb_ch->ldb; - int dual = ldb->ldb_ctrl & LDB_SPLIT_MODE_EN; - int mux = imx_drm_encoder_get_mux_id(imx_ldb_ch->child, encoder); - - if (dual) { - clk_prepare_enable(ldb->clk[0]); - clk_prepare_enable(ldb->clk[1]); - } - - if (imx_ldb_ch == &ldb->channel[0] || dual) { - ldb->ldb_ctrl &= ~LDB_CH0_MODE_EN_MASK; - if (mux == 0 || ldb->lvds_mux) - ldb->ldb_ctrl |= LDB_CH0_MODE_EN_TO_DI0; - else if (mux == 1) - ldb->ldb_ctrl |= LDB_CH0_MODE_EN_TO_DI1; - } - if (imx_ldb_ch == &ldb->channel[1] || dual) { - ldb->ldb_ctrl &= ~LDB_CH1_MODE_EN_MASK; - if (mux == 1 || ldb->lvds_mux) - ldb->ldb_ctrl |= LDB_CH1_MODE_EN_TO_DI1; - else if (mux == 0) - ldb->ldb_ctrl |= LDB_CH1_MODE_EN_TO_DI0; - } - - if (ldb->lvds_mux) { - const struct bus_mux *lvds_mux = NULL; - - if (imx_ldb_ch == &ldb->channel[0]) - lvds_mux = &ldb->lvds_mux[0]; - else if (imx_ldb_ch == &ldb->channel[1]) - lvds_mux = &ldb->lvds_mux[1]; - - regmap_update_bits(ldb->regmap, lvds_mux->reg, lvds_mux->mask, - mux << lvds_mux->shift); - } - - regmap_write(ldb->regmap, IOMUXC_GPR2, ldb->ldb_ctrl); -} - -static void imx_ldb_encoder_mode_set(struct drm_encoder *encoder, - struct drm_display_mode *mode, - struct drm_display_mode *adjusted_mode) -{ - struct imx_ldb_channel *imx_ldb_ch = enc_to_imx_ldb_ch(encoder); - struct imx_ldb *ldb = imx_ldb_ch->ldb; - int dual = ldb->ldb_ctrl & LDB_SPLIT_MODE_EN; - - if (mode->clock > 170000) { - dev_warn(ldb->dev, - "%s: mode exceeds 170 MHz pixel clock\n", __func__); - } - if (mode->clock > 85000 && !dual) { - dev_warn(ldb->dev, - "%s: mode exceeds 85 MHz pixel clock\n", __func__); - } - - /* FIXME - assumes straight connections DI0 --> CH0, DI1 --> CH1 */ - if (imx_ldb_ch == &ldb->channel[0]) { - if (mode->flags & DRM_MODE_FLAG_NVSYNC) - ldb->ldb_ctrl |= LDB_DI0_VS_POL_ACT_LOW; - else if (mode->flags & DRM_MODE_FLAG_PVSYNC) - ldb->ldb_ctrl &= ~LDB_DI0_VS_POL_ACT_LOW; - } - if (imx_ldb_ch == &ldb->channel[1]) { - if (mode->flags & DRM_MODE_FLAG_NVSYNC) - ldb->ldb_ctrl |= LDB_DI1_VS_POL_ACT_LOW; - else if (mode->flags & DRM_MODE_FLAG_PVSYNC) - ldb->ldb_ctrl &= ~LDB_DI1_VS_POL_ACT_LOW; - } -} - -static void imx_ldb_encoder_disable(struct drm_encoder *encoder) -{ - struct imx_ldb_channel *imx_ldb_ch = enc_to_imx_ldb_ch(encoder); - struct imx_ldb *ldb = imx_ldb_ch->ldb; - - /* - * imx_ldb_encoder_disable is called by - * drm_helper_disable_unused_functions without - * the encoder being enabled before. - */ - if (imx_ldb_ch == &ldb->channel[0] && - (ldb->ldb_ctrl & LDB_CH0_MODE_EN_MASK) == 0) - return; - else if (imx_ldb_ch == &ldb->channel[1] && - (ldb->ldb_ctrl & LDB_CH1_MODE_EN_MASK) == 0) - return; - - if (imx_ldb_ch == &ldb->channel[0]) - ldb->ldb_ctrl &= ~LDB_CH0_MODE_EN_MASK; - else if (imx_ldb_ch == &ldb->channel[1]) - ldb->ldb_ctrl &= ~LDB_CH1_MODE_EN_MASK; - - regmap_write(ldb->regmap, IOMUXC_GPR2, ldb->ldb_ctrl); - - if (ldb->ldb_ctrl & LDB_SPLIT_MODE_EN) { - clk_disable_unprepare(ldb->clk[0]); - clk_disable_unprepare(ldb->clk[1]); - } -} - -static struct drm_connector_funcs imx_ldb_connector_funcs = { - .dpms = drm_helper_connector_dpms, - .fill_modes = drm_helper_probe_single_connector_modes, - .detect = imx_ldb_connector_detect, - .destroy = imx_drm_connector_destroy, -}; - -static struct drm_connector_helper_funcs imx_ldb_connector_helper_funcs = { - .get_modes = imx_ldb_connector_get_modes, - .best_encoder = imx_ldb_connector_best_encoder, -}; - -static struct drm_encoder_funcs imx_ldb_encoder_funcs = { - .destroy = imx_drm_encoder_destroy, -}; - -static struct drm_encoder_helper_funcs imx_ldb_encoder_helper_funcs = { - .dpms = imx_ldb_encoder_dpms, - .mode_fixup = imx_ldb_encoder_mode_fixup, - .prepare = imx_ldb_encoder_prepare, - .commit = imx_ldb_encoder_commit, - .mode_set = imx_ldb_encoder_mode_set, - .disable = imx_ldb_encoder_disable, -}; - -static int imx_ldb_get_clk(struct imx_ldb *ldb, int chno) -{ - char clkname[16]; - - snprintf(clkname, sizeof(clkname), "di%d", chno); - ldb->clk[chno] = devm_clk_get(ldb->dev, clkname); - if (IS_ERR(ldb->clk[chno])) - return PTR_ERR(ldb->clk[chno]); - - snprintf(clkname, sizeof(clkname), "di%d_pll", chno); - ldb->clk_pll[chno] = devm_clk_get(ldb->dev, clkname); - - return PTR_ERR_OR_ZERO(ldb->clk_pll[chno]); -} - -static int imx_ldb_register(struct drm_device *drm, - struct imx_ldb_channel *imx_ldb_ch) -{ - struct imx_ldb *ldb = imx_ldb_ch->ldb; - int ret; - - ret = imx_drm_encoder_parse_of(drm, &imx_ldb_ch->encoder, - imx_ldb_ch->child); - if (ret) - return ret; - - ret = imx_ldb_get_clk(ldb, imx_ldb_ch->chno); - if (ret) - return ret; - - if (ldb->ldb_ctrl & LDB_SPLIT_MODE_EN) { - ret = imx_ldb_get_clk(ldb, 1); - if (ret) - return ret; - } - - drm_encoder_helper_add(&imx_ldb_ch->encoder, - &imx_ldb_encoder_helper_funcs); - drm_encoder_init(drm, &imx_ldb_ch->encoder, &imx_ldb_encoder_funcs, - DRM_MODE_ENCODER_LVDS); - - drm_connector_helper_add(&imx_ldb_ch->connector, - &imx_ldb_connector_helper_funcs); - drm_connector_init(drm, &imx_ldb_ch->connector, - &imx_ldb_connector_funcs, DRM_MODE_CONNECTOR_LVDS); - - drm_mode_connector_attach_encoder(&imx_ldb_ch->connector, - &imx_ldb_ch->encoder); - - return 0; -} - -enum { - LVDS_BIT_MAP_SPWG, - LVDS_BIT_MAP_JEIDA -}; - -static const char * const imx_ldb_bit_mappings[] = { - [LVDS_BIT_MAP_SPWG] = "spwg", - [LVDS_BIT_MAP_JEIDA] = "jeida", -}; - -static const int of_get_data_mapping(struct device_node *np) -{ - const char *bm; - int ret, i; - - ret = of_property_read_string(np, "fsl,data-mapping", &bm); - if (ret < 0) - return ret; - - for (i = 0; i < ARRAY_SIZE(imx_ldb_bit_mappings); i++) - if (!strcasecmp(bm, imx_ldb_bit_mappings[i])) - return i; - - return -EINVAL; -} - -static struct bus_mux imx6q_lvds_mux[2] = { - { - .reg = IOMUXC_GPR3, - .shift = 6, - .mask = IMX6Q_GPR3_LVDS0_MUX_CTL_MASK, - }, { - .reg = IOMUXC_GPR3, - .shift = 8, - .mask = IMX6Q_GPR3_LVDS1_MUX_CTL_MASK, - } -}; - -/* - * For a device declaring compatible = "fsl,imx6q-ldb", "fsl,imx53-ldb", - * of_match_device will walk through this list and take the first entry - * matching any of its compatible values. Therefore, the more generic - * entries (in this case fsl,imx53-ldb) need to be ordered last. - */ -static const struct of_device_id imx_ldb_dt_ids[] = { - { .compatible = "fsl,imx6q-ldb", .data = imx6q_lvds_mux, }, - { .compatible = "fsl,imx53-ldb", .data = NULL, }, - { } -}; -MODULE_DEVICE_TABLE(of, imx_ldb_dt_ids); - -static int imx_ldb_bind(struct device *dev, struct device *master, void *data) -{ - struct drm_device *drm = data; - struct device_node *np = dev->of_node; - const struct of_device_id *of_id = - of_match_device(imx_ldb_dt_ids, dev); - struct device_node *child; - const u8 *edidp; - struct imx_ldb *imx_ldb; - int datawidth; - int mapping; - int dual; - int ret; - int i; - - imx_ldb = devm_kzalloc(dev, sizeof(*imx_ldb), GFP_KERNEL); - if (!imx_ldb) - return -ENOMEM; - - imx_ldb->regmap = syscon_regmap_lookup_by_phandle(np, "gpr"); - if (IS_ERR(imx_ldb->regmap)) { - dev_err(dev, "failed to get parent regmap\n"); - return PTR_ERR(imx_ldb->regmap); - } - - imx_ldb->dev = dev; - - if (of_id) - imx_ldb->lvds_mux = of_id->data; - - dual = of_property_read_bool(np, "fsl,dual-channel"); - if (dual) - imx_ldb->ldb_ctrl |= LDB_SPLIT_MODE_EN; - - /* - * There are three different possible clock mux configurations: - * i.MX53: ipu1_di0_sel, ipu1_di1_sel - * i.MX6q: ipu1_di0_sel, ipu1_di1_sel, ipu2_di0_sel, ipu2_di1_sel - * i.MX6dl: ipu1_di0_sel, ipu1_di1_sel, lcdif_sel - * Map them all to di0_sel...di3_sel. - */ - for (i = 0; i < 4; i++) { - char clkname[16]; - - sprintf(clkname, "di%d_sel", i); - imx_ldb->clk_sel[i] = devm_clk_get(imx_ldb->dev, clkname); - if (IS_ERR(imx_ldb->clk_sel[i])) { - ret = PTR_ERR(imx_ldb->clk_sel[i]); - imx_ldb->clk_sel[i] = NULL; - break; - } - } - if (i == 0) - return ret; - - for_each_child_of_node(np, child) { - struct imx_ldb_channel *channel; - - ret = of_property_read_u32(child, "reg", &i); - if (ret || i < 0 || i > 1) - return -EINVAL; - - if (dual && i > 0) { - dev_warn(dev, "dual-channel mode, ignoring second output\n"); - continue; - } - - if (!of_device_is_available(child)) - continue; - - channel = &imx_ldb->channel[i]; - channel->ldb = imx_ldb; - channel->chno = i; - channel->child = child; - - edidp = of_get_property(child, "edid", &channel->edid_len); - if (edidp) { - channel->edid = kmemdup(edidp, channel->edid_len, - GFP_KERNEL); - } else { - ret = of_get_drm_display_mode(child, &channel->mode, 0); - if (!ret) - channel->mode_valid = 1; - } - - ret = of_property_read_u32(child, "fsl,data-width", &datawidth); - if (ret) - datawidth = 0; - else if (datawidth != 18 && datawidth != 24) - return -EINVAL; - - mapping = of_get_data_mapping(child); - switch (mapping) { - case LVDS_BIT_MAP_SPWG: - if (datawidth == 24) { - if (i == 0 || dual) - imx_ldb->ldb_ctrl |= - LDB_DATA_WIDTH_CH0_24; - if (i == 1 || dual) - imx_ldb->ldb_ctrl |= - LDB_DATA_WIDTH_CH1_24; - } - break; - case LVDS_BIT_MAP_JEIDA: - if (datawidth == 18) { - dev_err(dev, "JEIDA standard only supported in 24 bit\n"); - return -EINVAL; - } - if (i == 0 || dual) - imx_ldb->ldb_ctrl |= LDB_DATA_WIDTH_CH0_24 | - LDB_BIT_MAP_CH0_JEIDA; - if (i == 1 || dual) - imx_ldb->ldb_ctrl |= LDB_DATA_WIDTH_CH1_24 | - LDB_BIT_MAP_CH1_JEIDA; - break; - default: - dev_err(dev, "data mapping not specified or invalid\n"); - return -EINVAL; - } - - ret = imx_ldb_register(drm, channel); - if (ret) - return ret; - } - - dev_set_drvdata(dev, imx_ldb); - - return 0; -} - -static void imx_ldb_unbind(struct device *dev, struct device *master, - void *data) -{ - struct imx_ldb *imx_ldb = dev_get_drvdata(dev); - int i; - - for (i = 0; i < 2; i++) { - struct imx_ldb_channel *channel = &imx_ldb->channel[i]; - - if (!channel->connector.funcs) - continue; - - channel->connector.funcs->destroy(&channel->connector); - channel->encoder.funcs->destroy(&channel->encoder); - } -} - -static const struct component_ops imx_ldb_ops = { - .bind = imx_ldb_bind, - .unbind = imx_ldb_unbind, -}; - -static int imx_ldb_probe(struct platform_device *pdev) -{ - return component_add(&pdev->dev, &imx_ldb_ops); -} - -static int imx_ldb_remove(struct platform_device *pdev) -{ - component_del(&pdev->dev, &imx_ldb_ops); - return 0; -} - -static struct platform_driver imx_ldb_driver = { - .probe = imx_ldb_probe, - .remove = imx_ldb_remove, - .driver = { - .of_match_table = imx_ldb_dt_ids, - .name = DRIVER_NAME, - }, -}; - -module_platform_driver(imx_ldb_driver); - -MODULE_DESCRIPTION("i.MX LVDS driver"); -MODULE_AUTHOR("Sascha Hauer, Pengutronix"); -MODULE_LICENSE("GPL"); -MODULE_ALIAS("platform:" DRIVER_NAME); |