diff options
author | 2015-08-04 12:17:53 -0700 | |
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committer | 2015-08-04 15:44:42 -0700 | |
commit | 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch) | |
tree | 1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/drivers/gpu/drm/msm/hdmi/hdmi_connector.c | |
parent | 98260f3884f4a202f9ca5eabed40b1354c489b29 (diff) |
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base.
It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:
commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Sat Jul 25 12:13:34 2015 +0200
Prepare v4.1.3-rt3
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.
Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/drivers/gpu/drm/msm/hdmi/hdmi_connector.c')
-rw-r--r-- | kernel/drivers/gpu/drm/msm/hdmi/hdmi_connector.c | 449 |
1 files changed, 449 insertions, 0 deletions
diff --git a/kernel/drivers/gpu/drm/msm/hdmi/hdmi_connector.c b/kernel/drivers/gpu/drm/msm/hdmi/hdmi_connector.c new file mode 100644 index 000000000..b62cdb968 --- /dev/null +++ b/kernel/drivers/gpu/drm/msm/hdmi/hdmi_connector.c @@ -0,0 +1,449 @@ +/* + * Copyright (C) 2013 Red Hat + * Author: Rob Clark <robdclark@gmail.com> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 as published by + * the Free Software Foundation. + * + * 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, see <http://www.gnu.org/licenses/>. + */ + +#include <linux/gpio.h> + +#include "msm_kms.h" +#include "hdmi.h" + +struct hdmi_connector { + struct drm_connector base; + struct hdmi *hdmi; + struct work_struct hpd_work; +}; +#define to_hdmi_connector(x) container_of(x, struct hdmi_connector, base) + +static int gpio_config(struct hdmi *hdmi, bool on) +{ + struct drm_device *dev = hdmi->dev; + const struct hdmi_platform_config *config = hdmi->config; + int ret; + + if (on) { + ret = gpio_request(config->ddc_clk_gpio, "HDMI_DDC_CLK"); + if (ret) { + dev_err(dev->dev, "'%s'(%d) gpio_request failed: %d\n", + "HDMI_DDC_CLK", config->ddc_clk_gpio, ret); + goto error1; + } + gpio_set_value_cansleep(config->ddc_clk_gpio, 1); + + ret = gpio_request(config->ddc_data_gpio, "HDMI_DDC_DATA"); + if (ret) { + dev_err(dev->dev, "'%s'(%d) gpio_request failed: %d\n", + "HDMI_DDC_DATA", config->ddc_data_gpio, ret); + goto error2; + } + gpio_set_value_cansleep(config->ddc_data_gpio, 1); + + ret = gpio_request(config->hpd_gpio, "HDMI_HPD"); + if (ret) { + dev_err(dev->dev, "'%s'(%d) gpio_request failed: %d\n", + "HDMI_HPD", config->hpd_gpio, ret); + goto error3; + } + gpio_direction_input(config->hpd_gpio); + gpio_set_value_cansleep(config->hpd_gpio, 1); + + if (config->mux_en_gpio != -1) { + ret = gpio_request(config->mux_en_gpio, "HDMI_MUX_EN"); + if (ret) { + dev_err(dev->dev, "'%s'(%d) gpio_request failed: %d\n", + "HDMI_MUX_EN", config->mux_en_gpio, ret); + goto error4; + } + gpio_set_value_cansleep(config->mux_en_gpio, 1); + } + + if (config->mux_sel_gpio != -1) { + ret = gpio_request(config->mux_sel_gpio, "HDMI_MUX_SEL"); + if (ret) { + dev_err(dev->dev, "'%s'(%d) gpio_request failed: %d\n", + "HDMI_MUX_SEL", config->mux_sel_gpio, ret); + goto error5; + } + gpio_set_value_cansleep(config->mux_sel_gpio, 0); + } + + if (config->mux_lpm_gpio != -1) { + ret = gpio_request(config->mux_lpm_gpio, + "HDMI_MUX_LPM"); + if (ret) { + dev_err(dev->dev, + "'%s'(%d) gpio_request failed: %d\n", + "HDMI_MUX_LPM", + config->mux_lpm_gpio, ret); + goto error6; + } + gpio_set_value_cansleep(config->mux_lpm_gpio, 1); + } + DBG("gpio on"); + } else { + gpio_free(config->ddc_clk_gpio); + gpio_free(config->ddc_data_gpio); + gpio_free(config->hpd_gpio); + + if (config->mux_en_gpio != -1) { + gpio_set_value_cansleep(config->mux_en_gpio, 0); + gpio_free(config->mux_en_gpio); + } + + if (config->mux_sel_gpio != -1) { + gpio_set_value_cansleep(config->mux_sel_gpio, 1); + gpio_free(config->mux_sel_gpio); + } + + if (config->mux_lpm_gpio != -1) { + gpio_set_value_cansleep(config->mux_lpm_gpio, 0); + gpio_free(config->mux_lpm_gpio); + } + DBG("gpio off"); + } + + return 0; + +error6: + if (config->mux_sel_gpio != -1) + gpio_free(config->mux_sel_gpio); +error5: + if (config->mux_en_gpio != -1) + gpio_free(config->mux_en_gpio); +error4: + gpio_free(config->hpd_gpio); +error3: + gpio_free(config->ddc_data_gpio); +error2: + gpio_free(config->ddc_clk_gpio); +error1: + return ret; +} + +static int hpd_enable(struct hdmi_connector *hdmi_connector) +{ + struct hdmi *hdmi = hdmi_connector->hdmi; + const struct hdmi_platform_config *config = hdmi->config; + struct drm_device *dev = hdmi_connector->base.dev; + struct hdmi_phy *phy = hdmi->phy; + uint32_t hpd_ctrl; + int i, ret; + + for (i = 0; i < config->hpd_reg_cnt; i++) { + ret = regulator_enable(hdmi->hpd_regs[i]); + if (ret) { + dev_err(dev->dev, "failed to enable hpd regulator: %s (%d)\n", + config->hpd_reg_names[i], ret); + goto fail; + } + } + + ret = gpio_config(hdmi, true); + if (ret) { + dev_err(dev->dev, "failed to configure GPIOs: %d\n", ret); + goto fail; + } + + for (i = 0; i < config->hpd_clk_cnt; i++) { + if (config->hpd_freq && config->hpd_freq[i]) { + ret = clk_set_rate(hdmi->hpd_clks[i], + config->hpd_freq[i]); + if (ret) + dev_warn(dev->dev, "failed to set clk %s (%d)\n", + config->hpd_clk_names[i], ret); + } + + ret = clk_prepare_enable(hdmi->hpd_clks[i]); + if (ret) { + dev_err(dev->dev, "failed to enable hpd clk: %s (%d)\n", + config->hpd_clk_names[i], ret); + goto fail; + } + } + + hdmi_set_mode(hdmi, false); + phy->funcs->reset(phy); + hdmi_set_mode(hdmi, true); + + hdmi_write(hdmi, REG_HDMI_USEC_REFTIMER, 0x0001001b); + + /* enable HPD events: */ + hdmi_write(hdmi, REG_HDMI_HPD_INT_CTRL, + HDMI_HPD_INT_CTRL_INT_CONNECT | + HDMI_HPD_INT_CTRL_INT_EN); + + /* set timeout to 4.1ms (max) for hardware debounce */ + hpd_ctrl = hdmi_read(hdmi, REG_HDMI_HPD_CTRL); + hpd_ctrl |= HDMI_HPD_CTRL_TIMEOUT(0x1fff); + + /* Toggle HPD circuit to trigger HPD sense */ + hdmi_write(hdmi, REG_HDMI_HPD_CTRL, + ~HDMI_HPD_CTRL_ENABLE & hpd_ctrl); + hdmi_write(hdmi, REG_HDMI_HPD_CTRL, + HDMI_HPD_CTRL_ENABLE | hpd_ctrl); + + return 0; + +fail: + return ret; +} + +static void hdp_disable(struct hdmi_connector *hdmi_connector) +{ + struct hdmi *hdmi = hdmi_connector->hdmi; + const struct hdmi_platform_config *config = hdmi->config; + struct drm_device *dev = hdmi_connector->base.dev; + int i, ret = 0; + + /* Disable HPD interrupt */ + hdmi_write(hdmi, REG_HDMI_HPD_INT_CTRL, 0); + + hdmi_set_mode(hdmi, false); + + for (i = 0; i < config->hpd_clk_cnt; i++) + clk_disable_unprepare(hdmi->hpd_clks[i]); + + ret = gpio_config(hdmi, false); + if (ret) + dev_warn(dev->dev, "failed to unconfigure GPIOs: %d\n", ret); + + for (i = 0; i < config->hpd_reg_cnt; i++) { + ret = regulator_disable(hdmi->hpd_regs[i]); + if (ret) + dev_warn(dev->dev, "failed to disable hpd regulator: %s (%d)\n", + config->hpd_reg_names[i], ret); + } +} + +static void +hotplug_work(struct work_struct *work) +{ + struct hdmi_connector *hdmi_connector = + container_of(work, struct hdmi_connector, hpd_work); + struct drm_connector *connector = &hdmi_connector->base; + drm_helper_hpd_irq_event(connector->dev); +} + +void hdmi_connector_irq(struct drm_connector *connector) +{ + struct hdmi_connector *hdmi_connector = to_hdmi_connector(connector); + struct msm_drm_private *priv = connector->dev->dev_private; + struct hdmi *hdmi = hdmi_connector->hdmi; + uint32_t hpd_int_status, hpd_int_ctrl; + + /* Process HPD: */ + hpd_int_status = hdmi_read(hdmi, REG_HDMI_HPD_INT_STATUS); + hpd_int_ctrl = hdmi_read(hdmi, REG_HDMI_HPD_INT_CTRL); + + if ((hpd_int_ctrl & HDMI_HPD_INT_CTRL_INT_EN) && + (hpd_int_status & HDMI_HPD_INT_STATUS_INT)) { + bool detected = !!(hpd_int_status & HDMI_HPD_INT_STATUS_CABLE_DETECTED); + + /* ack & disable (temporarily) HPD events: */ + hdmi_write(hdmi, REG_HDMI_HPD_INT_CTRL, + HDMI_HPD_INT_CTRL_INT_ACK); + + DBG("status=%04x, ctrl=%04x", hpd_int_status, hpd_int_ctrl); + + /* detect disconnect if we are connected or visa versa: */ + hpd_int_ctrl = HDMI_HPD_INT_CTRL_INT_EN; + if (!detected) + hpd_int_ctrl |= HDMI_HPD_INT_CTRL_INT_CONNECT; + hdmi_write(hdmi, REG_HDMI_HPD_INT_CTRL, hpd_int_ctrl); + + queue_work(priv->wq, &hdmi_connector->hpd_work); + } +} + +static enum drm_connector_status detect_reg(struct hdmi *hdmi) +{ + uint32_t hpd_int_status = hdmi_read(hdmi, REG_HDMI_HPD_INT_STATUS); + return (hpd_int_status & HDMI_HPD_INT_STATUS_CABLE_DETECTED) ? + connector_status_connected : connector_status_disconnected; +} + +static enum drm_connector_status detect_gpio(struct hdmi *hdmi) +{ + const struct hdmi_platform_config *config = hdmi->config; + return gpio_get_value(config->hpd_gpio) ? + connector_status_connected : + connector_status_disconnected; +} + +static enum drm_connector_status hdmi_connector_detect( + struct drm_connector *connector, bool force) +{ + struct hdmi_connector *hdmi_connector = to_hdmi_connector(connector); + struct hdmi *hdmi = hdmi_connector->hdmi; + enum drm_connector_status stat_gpio, stat_reg; + int retry = 20; + + do { + stat_gpio = detect_gpio(hdmi); + stat_reg = detect_reg(hdmi); + + if (stat_gpio == stat_reg) + break; + + mdelay(10); + } while (--retry); + + /* the status we get from reading gpio seems to be more reliable, + * so trust that one the most if we didn't manage to get hdmi and + * gpio status to agree: + */ + if (stat_gpio != stat_reg) { + DBG("HDMI_HPD_INT_STATUS tells us: %d", stat_reg); + DBG("hpd gpio tells us: %d", stat_gpio); + } + + return stat_gpio; +} + +static void hdmi_connector_destroy(struct drm_connector *connector) +{ + struct hdmi_connector *hdmi_connector = to_hdmi_connector(connector); + + hdp_disable(hdmi_connector); + + drm_connector_unregister(connector); + drm_connector_cleanup(connector); + + kfree(hdmi_connector); +} + +static int hdmi_connector_get_modes(struct drm_connector *connector) +{ + struct hdmi_connector *hdmi_connector = to_hdmi_connector(connector); + struct hdmi *hdmi = hdmi_connector->hdmi; + struct edid *edid; + uint32_t hdmi_ctrl; + int ret = 0; + + hdmi_ctrl = hdmi_read(hdmi, REG_HDMI_CTRL); + hdmi_write(hdmi, REG_HDMI_CTRL, hdmi_ctrl | HDMI_CTRL_ENABLE); + + edid = drm_get_edid(connector, hdmi->i2c); + + hdmi_write(hdmi, REG_HDMI_CTRL, hdmi_ctrl); + + drm_mode_connector_update_edid_property(connector, edid); + + if (edid) { + ret = drm_add_edid_modes(connector, edid); + kfree(edid); + } + + return ret; +} + +static int hdmi_connector_mode_valid(struct drm_connector *connector, + struct drm_display_mode *mode) +{ + struct hdmi_connector *hdmi_connector = to_hdmi_connector(connector); + struct hdmi *hdmi = hdmi_connector->hdmi; + const struct hdmi_platform_config *config = hdmi->config; + struct msm_drm_private *priv = connector->dev->dev_private; + struct msm_kms *kms = priv->kms; + long actual, requested; + + requested = 1000 * mode->clock; + actual = kms->funcs->round_pixclk(kms, + requested, hdmi_connector->hdmi->encoder); + + /* for mdp5/apq8074, we manage our own pixel clk (as opposed to + * mdp4/dtv stuff where pixel clk is assigned to mdp/encoder + * instead): + */ + if (config->pwr_clk_cnt > 0) + actual = clk_round_rate(hdmi->pwr_clks[0], actual); + + DBG("requested=%ld, actual=%ld", requested, actual); + + if (actual != requested) + return MODE_CLOCK_RANGE; + + return 0; +} + +static struct drm_encoder * +hdmi_connector_best_encoder(struct drm_connector *connector) +{ + struct hdmi_connector *hdmi_connector = to_hdmi_connector(connector); + return hdmi_connector->hdmi->encoder; +} + +static const struct drm_connector_funcs hdmi_connector_funcs = { + .dpms = drm_atomic_helper_connector_dpms, + .detect = hdmi_connector_detect, + .fill_modes = drm_helper_probe_single_connector_modes, + .destroy = hdmi_connector_destroy, + .reset = drm_atomic_helper_connector_reset, + .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, + .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, +}; + +static const struct drm_connector_helper_funcs hdmi_connector_helper_funcs = { + .get_modes = hdmi_connector_get_modes, + .mode_valid = hdmi_connector_mode_valid, + .best_encoder = hdmi_connector_best_encoder, +}; + +/* initialize connector */ +struct drm_connector *hdmi_connector_init(struct hdmi *hdmi) +{ + struct drm_connector *connector = NULL; + struct hdmi_connector *hdmi_connector; + int ret; + + hdmi_connector = kzalloc(sizeof(*hdmi_connector), GFP_KERNEL); + if (!hdmi_connector) { + ret = -ENOMEM; + goto fail; + } + + hdmi_connector->hdmi = hdmi; + INIT_WORK(&hdmi_connector->hpd_work, hotplug_work); + + connector = &hdmi_connector->base; + + drm_connector_init(hdmi->dev, connector, &hdmi_connector_funcs, + DRM_MODE_CONNECTOR_HDMIA); + drm_connector_helper_add(connector, &hdmi_connector_helper_funcs); + + connector->polled = DRM_CONNECTOR_POLL_CONNECT | + DRM_CONNECTOR_POLL_DISCONNECT; + + connector->interlace_allowed = 0; + connector->doublescan_allowed = 0; + + drm_connector_register(connector); + + ret = hpd_enable(hdmi_connector); + if (ret) { + dev_err(hdmi->dev->dev, "failed to enable HPD: %d\n", ret); + goto fail; + } + + drm_mode_connector_attach_encoder(connector, hdmi->encoder); + + return connector; + +fail: + if (connector) + hdmi_connector_destroy(connector); + + return ERR_PTR(ret); +} |