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@@ -16,7 +16,9 @@
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#include <drm/drm_panel.h>
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#include <linux/clk.h>
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+#include <linux/gpio/consumer.h>
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#include <linux/irq.h>
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+#include <linux/of_gpio.h>
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#include <linux/phy/phy.h>
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#include <linux/regulator/consumer.h>
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#include <linux/component.h>
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@@ -24,6 +26,7 @@
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#include <video/mipi_display.h>
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#include <video/videomode.h>
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+#include "exynos_drm_crtc.h"
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#include "exynos_drm_drv.h"
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/* returns true iff both arguments logically differs */
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@@ -247,6 +250,7 @@ struct exynos_dsi {
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struct clk *bus_clk;
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struct regulator_bulk_data supplies[2];
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int irq;
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+ int te_gpio;
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u32 pll_clk_rate;
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u32 burst_clk_rate;
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@@ -954,17 +958,89 @@ static irqreturn_t exynos_dsi_irq(int irq, void *dev_id)
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return IRQ_HANDLED;
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}
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+static irqreturn_t exynos_dsi_te_irq_handler(int irq, void *dev_id)
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+{
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+ struct exynos_dsi *dsi = (struct exynos_dsi *)dev_id;
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+ struct drm_encoder *encoder = dsi->encoder;
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+
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+ if (dsi->state & DSIM_STATE_ENABLED)
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+ exynos_drm_crtc_te_handler(encoder->crtc);
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+
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+ return IRQ_HANDLED;
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+}
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+
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+static void exynos_dsi_enable_irq(struct exynos_dsi *dsi)
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+{
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+ enable_irq(dsi->irq);
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+
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+ if (gpio_is_valid(dsi->te_gpio))
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+ enable_irq(gpio_to_irq(dsi->te_gpio));
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+}
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+
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+static void exynos_dsi_disable_irq(struct exynos_dsi *dsi)
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+{
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+ if (gpio_is_valid(dsi->te_gpio))
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+ disable_irq(gpio_to_irq(dsi->te_gpio));
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+
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+ disable_irq(dsi->irq);
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+}
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+
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static int exynos_dsi_init(struct exynos_dsi *dsi)
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{
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exynos_dsi_enable_clock(dsi);
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exynos_dsi_reset(dsi);
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- enable_irq(dsi->irq);
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+ exynos_dsi_enable_irq(dsi);
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exynos_dsi_wait_for_reset(dsi);
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exynos_dsi_init_link(dsi);
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return 0;
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}
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+static int exynos_dsi_register_te_irq(struct exynos_dsi *dsi)
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+{
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+ int ret;
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+
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+ dsi->te_gpio = of_get_named_gpio(dsi->panel_node, "te-gpios", 0);
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+ if (!gpio_is_valid(dsi->te_gpio)) {
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+ dev_err(dsi->dev, "no te-gpios specified\n");
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+ ret = dsi->te_gpio;
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+ goto out;
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+ }
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+
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+ ret = gpio_request_one(dsi->te_gpio, GPIOF_IN, "te_gpio");
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+ if (ret) {
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+ dev_err(dsi->dev, "gpio request failed with %d\n", ret);
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+ goto out;
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+ }
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+
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+ /*
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+ * This TE GPIO IRQ should not be set to IRQ_NOAUTOEN, because panel
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+ * calls drm_panel_init() first then calls mipi_dsi_attach() in probe().
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+ * It means that te_gpio is invalid when exynos_dsi_enable_irq() is
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+ * called by drm_panel_init() before panel is attached.
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+ */
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+ ret = request_threaded_irq(gpio_to_irq(dsi->te_gpio),
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+ exynos_dsi_te_irq_handler, NULL,
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+ IRQF_TRIGGER_RISING, "TE", dsi);
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+ if (ret) {
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+ dev_err(dsi->dev, "request interrupt failed with %d\n", ret);
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+ gpio_free(dsi->te_gpio);
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+ goto out;
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+ }
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+
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+out:
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+ return ret;
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+}
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+
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+static void exynos_dsi_unregister_te_irq(struct exynos_dsi *dsi)
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+{
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+ if (gpio_is_valid(dsi->te_gpio)) {
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+ free_irq(gpio_to_irq(dsi->te_gpio), dsi);
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+ gpio_free(dsi->te_gpio);
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+ dsi->te_gpio = -ENOENT;
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+ }
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+}
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+
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static int exynos_dsi_host_attach(struct mipi_dsi_host *host,
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struct mipi_dsi_device *device)
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{
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@@ -978,6 +1054,19 @@ static int exynos_dsi_host_attach(struct mipi_dsi_host *host,
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if (dsi->connector.dev)
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drm_helper_hpd_irq_event(dsi->connector.dev);
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+ /*
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+ * This is a temporary solution and should be made by more generic way.
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+ *
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+ * If attached panel device is for command mode one, dsi should register
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+ * TE interrupt handler.
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+ */
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+ if (!(dsi->mode_flags & MIPI_DSI_MODE_VIDEO)) {
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+ int ret = exynos_dsi_register_te_irq(dsi);
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+
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+ if (ret)
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+ return ret;
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+ }
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+
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return 0;
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}
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@@ -986,6 +1075,8 @@ static int exynos_dsi_host_detach(struct mipi_dsi_host *host,
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{
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struct exynos_dsi *dsi = host_to_dsi(host);
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+ exynos_dsi_unregister_te_irq(dsi);
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+
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dsi->panel_node = NULL;
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if (dsi->connector.dev)
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@@ -1099,7 +1190,7 @@ static void exynos_dsi_poweroff(struct exynos_dsi *dsi)
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exynos_dsi_disable_clock(dsi);
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- disable_irq(dsi->irq);
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+ exynos_dsi_disable_irq(dsi);
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}
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dsi->state &= ~DSIM_STATE_CMD_LPM;
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@@ -1445,6 +1536,9 @@ static int exynos_dsi_probe(struct platform_device *pdev)
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goto err_del_component;
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}
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+ /* To be checked as invalid one */
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+ dsi->te_gpio = -ENOENT;
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+
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init_completion(&dsi->completed);
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spin_lock_init(&dsi->transfer_lock);
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INIT_LIST_HEAD(&dsi->transfer_list);
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