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 | 93 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 93 insertions(+)
diff --git a/drivers/gpu/drm/mediatek/mtk_dsi.c b/drivers/gpu/drm/mediatek/mtk_dsi.c index 4efeb38..e5832837 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 +30,16 @@
#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_BUSY BIT(31) + #define DSI_CON_CTRL 0x10 #define DSI_RESET BIT(0) #define DSI_EN BIT(1) @@ -71,6 +82,9 @@
#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) @@ -131,6 +145,8 @@ struct mtk_dsi { struct videomode vm; int refcount; bool enabled; + u32 irq_data; + wait_queue_head_t irq_wait_queue; };
static inline struct mtk_dsi *encoder_to_dsi(struct drm_encoder *e) @@ -437,6 +453,64 @@ 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 = LPRX_RD_RDY_INT_FLAG | CMD_DONE_INT_FLAG | VM_DONE_INT_FLAG; + + writel(inten, dsi->regs + DSI_INTEN); +} + +static void mtk_dsi_irq_data_set(struct mtk_dsi *dsi, u32 irq_bit) +{ + dsi->irq_data |= irq_bit; +} + +static __maybe_unused void mtk_dsi_irq_data_clear(struct mtk_dsi *dsi, u32 irq_bit) +{ + dsi->irq_data &= ~irq_bit; +} + +static __maybe_unused s32 mtk_dsi_wait_for_irq_done(struct mtk_dsi *dsi, u32 irq_flag, + unsigned int timeout) +{ + s32 ret = 0; + unsigned long jiffies = msecs_to_jiffies(timeout); + + ret = wait_event_interruptible_timeout(dsi->irq_wait_queue, + dsi->irq_data & irq_flag, + jiffies); + if (ret == 0) { + dev_info(dsi->dev, "Wait DSI IRQ(0x%08x) Timeout\n", irq_flag); + + mtk_dsi_enable(dsi); + mtk_dsi_reset_engine(dsi); + } + + return ret; +} + +static irqreturn_t mtk_dsi_irq(int irq, void *dev_id) +{ + struct mtk_dsi *dsi = dev_id; + u32 status, tmp; + u32 flag = LPRX_RD_RDY_INT_FLAG | CMD_DONE_INT_FLAG | VM_DONE_INT_FLAG; + + status = readl(dsi->regs + DSI_INTSTA) & flag; + + if (status) { + 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, status, 0); + mtk_dsi_irq_data_set(dsi, status); + wake_up_interruptible(&dsi->irq_wait_queue); + } + + return IRQ_HANDLED; +} + static void mtk_dsi_poweroff(struct mtk_dsi *dsi) { if (WARN_ON(dsi->refcount == 0)) @@ -485,6 +559,7 @@ 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); @@ -793,6 +868,7 @@ 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;
@@ -869,6 +945,23 @@ 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; + } + dev_info(dev, "dsi irq num is 0x%x\n", irq_num); + + init_waitqueue_head(&dsi->irq_wait_queue); + platform_set_drvdata(pdev, dsi);
return component_add(&pdev->dev, &mtk_dsi_component_ops);