From: shaoming chen shaoming.chen@mediatek.com
add dsi interrupt control
Signed-off-by: shaoming chen shaoming.chen@mediatek.com --- drivers/gpu/drm/mediatek/mtk_dsi.c | 92 ++++++++++++++++++++++++++++++++++++ 1 file changed, 92 insertions(+)
diff --git a/drivers/gpu/drm/mediatek/mtk_dsi.c b/drivers/gpu/drm/mediatek/mtk_dsi.c index a9cf5a1..553443a 100644 --- a/drivers/gpu/drm/mediatek/mtk_dsi.c +++ b/drivers/gpu/drm/mediatek/mtk_dsi.c @@ -18,6 +18,7 @@ #include <drm/drm_panel.h> #include <linux/clk.h> #include <linux/component.h> +#include <linux/irq.h> #include <linux/of.h> #include <linux/of_platform.h> #include <linux/of_graph.h> @@ -29,6 +30,17 @@
#define DSI_START 0x00
+#define DSI_INTEN 0x08 + +#define DSI_INTSTA 0x0c +#define LPRX_RD_RDY_INT_FLAG BIT(0) +#define CMD_DONE_INT_FLAG BIT(1) +#define TE_RDY_INT_FLAG BIT(2) +#define VM_DONE_INT_FLAG BIT(3) +#define EXT_TE_RDY_INT_FLAG BIT(4) +#define DSI_INT_ALL_BITS 0x7f +#define DSI_BUSY BIT(31) + #define DSI_CON_CTRL 0x10 #define DSI_RESET BIT(0) #define DSI_EN BIT(1) @@ -71,6 +83,9 @@
#define DSI_HSTX_CKL_WC 0x64
+#define DSI_RACK 0x84 +#define RACK BIT(0) + #define DSI_PHY_LCCON 0x104 #define LC_HS_TX_EN BIT(0) #define LC_ULPM_EN BIT(1) @@ -131,8 +146,13 @@ struct mtk_dsi { struct videomode vm; int refcount; bool enabled; + int irq_data; };
+static wait_queue_head_t _dsi_cmd_done_wait_queue; +static wait_queue_head_t _dsi_dcs_read_wait_queue; +static wait_queue_head_t _dsi_wait_vm_done_queue; + static inline struct mtk_dsi *encoder_to_dsi(struct drm_encoder *e) { return container_of(e, struct mtk_dsi, encoder); @@ -437,6 +457,55 @@ static void mtk_dsi_start(struct mtk_dsi *dsi) writel(1, dsi->regs + DSI_START); }
+static void mtk_dsi_set_interrupt_enable(struct mtk_dsi *dsi) +{ + u32 inten = DSI_INT_ALL_BITS; + + if (dsi->mode_flags & MIPI_DSI_MODE_VIDEO) + inten &= ~(TE_RDY_INT_FLAG | EXT_TE_RDY_INT_FLAG); + + writel(inten, dsi->regs + DSI_INTEN); +} + +static void mtk_dsi_irq_wakeup(struct mtk_dsi *dsi, u32 irq_bit) +{ + dsi->irq_data |= irq_bit; +} + +static irqreturn_t mtk_dsi_irq(int irq, void *dev_id) +{ + struct mtk_dsi *dsi = dev_id; + + u32 status, tmp; + + status = readl(dsi->regs + DSI_INTSTA); + + if (status & LPRX_RD_RDY_INT_FLAG) { + do { + mtk_dsi_mask(dsi, DSI_RACK, RACK, RACK); + tmp = readl(dsi->regs + DSI_INTSTA); + } while (tmp & DSI_BUSY); + + mtk_dsi_mask(dsi, DSI_INTSTA, LPRX_RD_RDY_INT_FLAG, 0); + mtk_dsi_irq_wakeup(dsi, LPRX_RD_RDY_INT_FLAG); + wake_up_interruptible(&_dsi_dcs_read_wait_queue); + } + + if (status & CMD_DONE_INT_FLAG) { + mtk_dsi_mask(dsi, DSI_INTSTA, CMD_DONE_INT_FLAG, 0); + mtk_dsi_irq_wakeup(dsi, CMD_DONE_INT_FLAG); + wake_up_interruptible(&_dsi_cmd_done_wait_queue); + } + + if (status & VM_DONE_INT_FLAG) { + mtk_dsi_mask(dsi, DSI_INTSTA, VM_DONE_INT_FLAG, 0); + mtk_dsi_irq_wakeup(dsi, VM_DONE_INT_FLAG); + wake_up_interruptible(&_dsi_wait_vm_done_queue); + } + + return IRQ_HANDLED; +} + static void mtk_dsi_poweroff(struct mtk_dsi *dsi) { if (WARN_ON(dsi->refcount == 0)) @@ -485,6 +554,7 @@ static void mtk_output_dsi_enable(struct mtk_dsi *dsi)
mtk_dsi_ps_control_vact(dsi); mtk_dsi_config_vdo_timing(dsi); + mtk_dsi_set_interrupt_enable(dsi);
mtk_dsi_set_mode(dsi); mtk_dsi_clk_hs_mode(dsi, 1); @@ -804,6 +874,7 @@ static int mtk_dsi_probe(struct platform_device *pdev) struct device *dev = &pdev->dev; struct device_node *remote_node, *endpoint; struct resource *regs; + int irq_num; int comp_id; int ret;
@@ -880,8 +951,29 @@ static int mtk_dsi_probe(struct platform_device *pdev) return ret; }
+ irq_num = platform_get_irq(pdev, 0); + if (irq_num < 0) { + dev_err(&pdev->dev, "failed to request dsi irq resource\n"); + return -EPROBE_DEFER; + } + + irq_set_status_flags(irq_num, IRQ_TYPE_LEVEL_LOW); + ret = devm_request_irq(&pdev->dev, irq_num, mtk_dsi_irq, + IRQF_TRIGGER_LOW, dev_name(&pdev->dev), dsi); + if (ret) { + dev_err(&pdev->dev, "failed to request mediatek dsi irq\n"); + return -EPROBE_DEFER; + } + + dsi->irq_data = 0; + dev_info(dev, "dsi irq num is 0x%x\n", irq_num); + platform_set_drvdata(pdev, dsi);
+ init_waitqueue_head(&_dsi_cmd_done_wait_queue); + init_waitqueue_head(&_dsi_dcs_read_wait_queue); + init_waitqueue_head(&_dsi_wait_vm_done_queue); + return component_add(&pdev->dev, &mtk_dsi_component_ops); }