From: shaoming chen <shaoming.c...@mediatek.com>
add dsi interrupt control
Signed-off-by: shaoming chen <shaoming.chen at mediatek.com>
---
drivers/gpu/drm/mediatek/mtk_dsi.c | 130 ++++++++++++++++++++++++++++++++++++
1 file changed, 130 insertions(+)
diff --git a/drivers/gpu/drm/mediatek/mtk_dsi.c
b/drivers/gpu/drm/mediatek/mtk_dsi.c
index 2d808e5..de5ad7f 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>
@@ -32,6 +33,13 @@
#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 DSI_BUSY BIT(31)
+
#define DSI_CON_CTRL 0x10
#define DSI_RESET BIT(0)
#define DSI_EN BIT(1)
@@ -74,6 +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)
@@ -134,6 +145,18 @@ struct mtk_dsi {
struct videomode vm;
int refcount;
bool enabled;
+ int irq_num, irq_data;
+};
+
+enum {
+ DSI_INT_SLEEPOUT_DONE_FLAG = BIT(6),
+ DSI_INT_VM_CMD_DONE_FLAG = BIT(5),
+ DSI_INT_EXT_TE_RDY_FLAG = BIT(4),
+ DSI_INT_VM_DONE_FLAG = BIT(3),
+ DSI_INT_TE_RDY_FLAG = BIT(2),
+ DSI_INT_CMD_DONE_FLAG = BIT(1),
+ DSI_INT_LPRX_RD_RDY_FLAG = BIT(0),
+ DSI_INT_ALL_BITS = (0x7f)
};
static inline struct mtk_dsi *encoder_to_dsi(struct drm_encoder *e)
@@ -440,6 +463,94 @@ 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 &= ~(DSI_INT_TE_RDY_FLAG | DSI_INT_EXT_TE_RDY_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 & DSI_INT_LPRX_RD_RDY_FLAG) {
+ /* write clear RD_RDY interrupt */
+ /* write clear RD_RDY interrupt must be before DSI_RACK */
+ /* because CMD_DONE will raise after DSI_RACK, */
+ /* so write clear RD_RDY after that will clear CMD_DONE too */
+ do {
+ /* send read ACK */
+ mtk_dsi_mask(dsi, DSI_RACK, RACK, RACK);
+ tmp = readl(dsi->regs + DSI_INTSTA);
+ } while (tmp & DSI_BUSY);
+
+ mtk_dsi_mask(dsi, DSI_INTSTA, DSI_INT_LPRX_RD_RDY_FLAG, 0);
+ mtk_dsi_irq_wakeup(dsi, DSI_INT_LPRX_RD_RDY_FLAG);
+ }
+
+ if (status & DSI_INT_CMD_DONE_FLAG) {
+ mtk_dsi_mask(dsi, DSI_INTSTA, DSI_INT_CMD_DONE_FLAG, 0);
+ mtk_dsi_irq_wakeup(dsi, DSI_INT_CMD_DONE_FLAG);
+ }
+
+ if (status & DSI_INT_TE_RDY_FLAG) {
+ mtk_dsi_mask(dsi, DSI_INTSTA, DSI_INT_TE_RDY_FLAG, 0);
+ mtk_dsi_irq_wakeup(dsi, DSI_INT_TE_RDY_FLAG);
+ }
+
+ if (status & DSI_INT_VM_DONE_FLAG) {
+ mtk_dsi_mask(dsi, DSI_INTSTA, DSI_INT_VM_DONE_FLAG, 0);
+ mtk_dsi_irq_wakeup(dsi, DSI_INT_VM_DONE_FLAG);
+ }
+
+ if (status & DSI_INT_EXT_TE_RDY_FLAG) {
+ mtk_dsi_mask(dsi, DSI_INTSTA, DSI_INT_EXT_TE_RDY_FLAG, 0);
+ mtk_dsi_irq_wakeup(dsi, DSI_INT_EXT_TE_RDY_FLAG);
+ }
+
+ if (status & DSI_INT_VM_CMD_DONE_FLAG) {
+ mtk_dsi_mask(dsi, DSI_INTSTA, DSI_INT_VM_CMD_DONE_FLAG, 0);
+ mtk_dsi_irq_wakeup(dsi, DSI_INT_VM_CMD_DONE_FLAG);
+ }
+
+ if (status & DSI_INT_SLEEPOUT_DONE_FLAG) {
+ mtk_dsi_mask(dsi, DSI_INTSTA, DSI_INT_SLEEPOUT_DONE_FLAG, 0);
+ mtk_dsi_irq_wakeup(dsi, DSI_INT_SLEEPOUT_DONE_FLAG);
+ }
+
+ return IRQ_HANDLED;
+}
+
+static s32 mtk_dsi_wait_for_irq_timeout(struct mtk_dsi *dsi, u32 irq_bit,
+ u32 timeout_ms)
+{
+ while (timeout_ms--) {
+ if (dsi->irq_data & irq_bit) {
+ dsi->irq_data &= ~irq_bit;
+ return 0;
+ }
+
+ usleep_range(1000, 1100);
+ }
+
+ dsi->irq_data = 0;
+
+ return -1;
+}
+
static void mtk_dsi_poweroff(struct mtk_dsi *dsi)
{
if (WARN_ON(dsi->refcount == 0))
@@ -488,6 +599,7 @@ static void mtk_output_dsi_enable(struct mtk_dsi *dsi)
dsi_ps_control_vact(dsi);
dsi_config_vdo_timing(dsi);
+ mtk_dsi_set_interrupt_enable(dsi);
dsi_set_mode(dsi);
dsi_clk_hs_mode(dsi, 1);
@@ -883,6 +995,24 @@ static int mtk_dsi_probe(struct platform_device *pdev)
return ret;
}
+ dsi->irq_num = platform_get_irq(pdev, 0);
+ if (dsi->irq_num < 0) {
+ dev_err(&pdev->dev, "failed to request dsi irq resource\n");
+ ret = dsi->irq_num;
+ return -EPROBE_DEFER;
+ }
+
+ irq_set_status_flags(dsi->irq_num, IRQ_TYPE_LEVEL_LOW);
+ ret = devm_request_irq(&pdev->dev, dsi->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", dsi->irq_num);
+
platform_set_drvdata(pdev, dsi);
return component_add(&pdev->dev, &mtk_dsi_component_ops);
--
1.7.9.5
