This initializes the interrupts for DSI. This is the final part of mipi DSI initialization.
Signed-off-by: Anitha Chrisanthus anitha.chrisanthus@intel.com Reviewed-by: Bob Paauwe bob.j.paauwe@intel.com --- drivers/gpu/drm/kmb/kmb_drv.c | 1 + drivers/gpu/drm/kmb/kmb_drv.h | 30 +++++++++++----- drivers/gpu/drm/kmb/kmb_dsi.c | 46 ++++++++++++++++++++++++ drivers/gpu/drm/kmb/kmb_dsi.h | 13 +++++++ drivers/gpu/drm/kmb/kmb_regs.h | 81 ++++++++++++++++++++++++++++++++++++++++++ 5 files changed, 163 insertions(+), 8 deletions(-)
diff --git a/drivers/gpu/drm/kmb/kmb_drv.c b/drivers/gpu/drm/kmb/kmb_drv.c index 224a7f8..19f78ba 100644 --- a/drivers/gpu/drm/kmb/kmb_drv.c +++ b/drivers/gpu/drm/kmb/kmb_drv.c @@ -58,6 +58,7 @@ static int kmb_load(struct drm_device *drm, unsigned long flags) if (ret && ret != -ENODEV) return ret;
+ spin_lock_init(&lcd->irq_lock); ret = kmb_setup_crtc(drm); if (ret < 0) { DRM_ERROR("failed to create crtc\n"); diff --git a/drivers/gpu/drm/kmb/kmb_drv.h b/drivers/gpu/drm/kmb/kmb_drv.h index 3996c84..14bdfc8 100644 --- a/drivers/gpu/drm/kmb/kmb_drv.h +++ b/drivers/gpu/drm/kmb/kmb_drv.h @@ -12,14 +12,15 @@ #define KMB_MAX_HEIGHT 16384 /*max height in pixels */
struct kmb_drm_private { - struct drm_device drm; - void __iomem *mmio; - unsigned char n_layers; - struct clk *clk; - struct drm_fbdev_cma *fbdev; - struct drm_crtc crtc; - struct kmb_plane *plane; - struct drm_atomic_state *state; + struct drm_device drm; + void __iomem *mmio; + unsigned char n_layers; + struct clk *clk; + struct drm_fbdev_cma *fbdev; + struct drm_crtc crtc; + struct kmb_plane *plane; + struct drm_atomic_state *state; + spinlock_t irq_lock; };
static inline struct kmb_drm_private *to_kmb(const struct drm_device *dev) @@ -111,6 +112,19 @@ static inline void kmb_clr_bit_mipi(unsigned int reg, u32 offset) kmb_write_mipi(reg, reg_val & (~(1 << offset))); }
+static inline void kmb_set_bitmask_mipi(unsigned int reg, u32 mask) +{ + u32 reg_val = kmb_read_mipi(reg); + + kmb_write_mipi(reg, (reg_val | mask)); +} + +static inline void kmb_clr_bitmask_mipi(unsigned int reg, u32 mask) +{ + u32 reg_val = kmb_read_mipi(reg); + + kmb_write_mipi(reg, (reg_val & (~mask))); +} int kmb_setup_crtc(struct drm_device *dev); void kmb_set_scanout(struct kmb_drm_private *lcd); #endif /* __KMB_DRV_H__ */ diff --git a/drivers/gpu/drm/kmb/kmb_dsi.c b/drivers/gpu/drm/kmb/kmb_dsi.c index f8ddb87..47456b2 100644 --- a/drivers/gpu/drm/kmb/kmb_dsi.c +++ b/drivers/gpu/drm/kmb/kmb_dsi.c @@ -5,6 +5,7 @@
#include <linux/gpio/consumer.h> #include <linux/slab.h> +#include <linux/spinlock.h> #include <drm/drm_atomic_helper.h> #include <drm/drm_connector.h> #include <drm/drm_crtc.h> @@ -188,6 +189,11 @@ static mipi_hs_freq_range_cfg {.default_bit_rate_mbps = 2500, .hsfreqrange_code = 0x49} };
+union mipi_irq_cfg int_cfg = { + .irq_cfg.frame_done = 1, + .irq_cfg.ctrl_error = 1, +}; + static enum drm_mode_status kmb_dsi_mode_valid(struct drm_connector *connector, struct drm_display_mode *mode) @@ -1174,6 +1180,43 @@ static u32 mipi_tx_init_dphy(struct mipi_ctrl_cfg *cfg) return 0; }
+static void mipi_tx_init_irqs(union mipi_irq_cfg *cfg, + struct kmb_drm_private *dev_priv, + struct mipi_tx_ctrl_cfg *tx_ctrl_cfg) +{ + unsigned long irqflags; + uint8_t vc; + + /* clear all interrupts first */ + /*local interrupts */ + SET_MIPI_TX_HS_IRQ_CLEAR(MIPI_CTRL6, MIPI_TX_HS_IRQ_ALL); + /*global interrupts */ + SET_MIPI_CTRL_IRQ_CLEAR0(MIPI_CTRL6, MIPI_HS_IRQ); + SET_MIPI_CTRL_IRQ_CLEAR0(MIPI_CTRL6, MIPI_DHY_ERR_IRQ); + SET_MIPI_CTRL_IRQ_CLEAR1(MIPI_CTRL6, MIPI_HS_RX_EVENT_IRQ); + + /*enable interrupts */ + spin_lock_irqsave(&dev_priv->irq_lock, irqflags); + for (vc = 0; vc < MIPI_CTRL_VIRTUAL_CHANNELS; vc++) { + if (tx_ctrl_cfg->frames[vc] == NULL) + continue; + /*enable FRAME_DONE interrupt if VC is configured */ + SET_HS_IRQ_ENABLE(MIPI_CTRL6, + MIPI_TX_HS_IRQ_FRAME_DONE_0 << vc); + break; /*only one vc for LCD interface */ + } + + /*enable user enabled interrupts */ + if (cfg->irq_cfg.dphy_error) + SET_MIPI_CTRL_IRQ_ENABLE0(MIPI_CTRL6, MIPI_DHY_ERR_IRQ); + if (cfg->irq_cfg.line_compare) + SET_HS_IRQ_ENABLE(MIPI_CTRL6, MIPI_TX_HS_IRQ_LINE_COMPARE); + if (cfg->irq_cfg.ctrl_error) + SET_HS_IRQ_ENABLE(MIPI_CTRL6, MIPI_TX_HS_IRQ_ERROR); + + spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags); +} + void kmb_dsi_init(struct drm_device *dev) { struct kmb_dsi *kmb_dsi; @@ -1219,4 +1262,7 @@ void kmb_dsi_init(struct drm_device *dev)
/*d-phy initialization */ mipi_tx_init_dphy(&mipi_tx_init_cfg); + + /* irq initialization */ + mipi_tx_init_irqs(&int_cfg, dev_priv, &mipi_tx_init_cfg.tx_ctrl_cfg); } diff --git a/drivers/gpu/drm/kmb/kmb_dsi.h b/drivers/gpu/drm/kmb/kmb_dsi.h index 7db7f58..810c5c7 100644 --- a/drivers/gpu/drm/kmb/kmb_dsi.h +++ b/drivers/gpu/drm/kmb/kmb_dsi.h @@ -295,6 +295,19 @@ struct mipi_ctrl_cfg { uint32_t data_if; /*MIPI_IF_DMA or MIPI_IF_PARALLEL */ struct mipi_tx_ctrl_cfg tx_ctrl_cfg; }; + +/*structure for storing user specified interrupts that are enabled */ +union mipi_irq_cfg { + uint8_t value; + struct { + uint8_t line_compare : 1; + uint8_t dma_event : 1; + uint8_t frame_done : 1; + uint8_t ctrl_error : 1; + uint8_t dphy_error : 1; + } irq_cfg; +}; + void kmb_dsi_init(struct drm_device *dev); void kmb_plane_destroy(struct drm_plane *plane);
diff --git a/drivers/gpu/drm/kmb/kmb_regs.h b/drivers/gpu/drm/kmb/kmb_regs.h index eec434e7..5d08ee4 100644 --- a/drivers/gpu/drm/kmb/kmb_regs.h +++ b/drivers/gpu/drm/kmb/kmb_regs.h @@ -501,6 +501,87 @@ kmb_write_bits_mipi(MIPI_TXm_HS_MC_FIFO_RTHRESHOLDn(ctrl, vc/2), \ (vc % 2)*16, 16, th)
+/* MIPI IRQ */ +#define MIPI_CTRL_IRQ_STATUS0 (0x00) +#define MIPI_DHY_ERR_IRQ 1 +#define MIPI_HS_IRQ 13 +#define MIPI_LP_EVENT_IRQ 25 +#define MIPI_CTRL_IRQ_STATUS1 (0x04) +#define MIPI_HS_RX_EVENT_IRQ 0 +#define MIPI_CTRL_IRQ_ENABLE0 (0x08) +#define SET_MIPI_CTRL_IRQ_ENABLE0(M, N) \ + kmb_set_bit_mipi(MIPI_CTRL_IRQ_ENABLE0, M+N) +#define MIPI_CTRL_IRQ_ENABLE1 (0x0c) +#define MIPI_CTRL_IRQ_CLEAR0 (0x010) +#define SET_MIPI_CTRL_IRQ_CLEAR0(M, N) \ + kmb_set_bit_mipi(MIPI_CTRL_IRQ_CLEAR0, M+N) +#define MIPI_CTRL_IRQ_CLEAR1 (0x014) +#define SET_MIPI_CTRL_IRQ_CLEAR1(M, N) \ + kmb_set_bit_mipi(MIPI_CTRL_IRQ_CLEAR1, M+N) +#define MIPI_TX_HS_IRQ_STATUS (0x01c) +#define MIPI_TX_HS_IRQ_STATUSm(M) \ + (MIPI_TX_HS_IRQ_STATUS + HS_OFFSET(M)) +#define MIPI_TX_HS_IRQ_LINE_COMPARE (1<<1) +#define MIPI_TX_HS_IRQ_FRAME_DONE_0 (1<<2) +#define MIPI_TX_HS_IRQ_FRAME_DONE_1 (1<<3) +#define MIPI_TX_HS_IRQ_FRAME_DONE_2 (1<<4) +#define MIPI_TX_HS_IRQ_FRAME_DONE_3 (1<<5) +#define MIPI_TX_HS_IRQ_DMA_DONE_0 (1<<6) +#define MIPI_TX_HS_IRQ_DMA_IDLE_0 (1<<7) +#define MIPI_TX_HS_IRQ_DMA_DONE_1 (1<<8) +#define MIPI_TX_HS_IRQ_DMA_IDLE_1 (1<<9) +#define MIPI_TX_HS_IRQ_DMA_DONE_2 (1<<10) +#define MIPI_TX_HS_IRQ_DMA_IDLE_2 (1<<11) +#define MIPI_TX_HS_IRQ_DMA_DONE_3 (1<<12) +#define MIPI_TX_HS_IRQ_DMA_IDLE_3 (1<<13) +#define MIPI_TX_HS_IRQ_MC_FIFO_UNDERFLOW (1<<14) +#define MIPI_TX_HS_IRQ_MC_FIFO_OVERFLOW (1<<15) +#define MIPI_TX_HS_IRQ_LLP_FIFO_EMPTY (1<<16) +#define MIPI_TX_HS_IRQ_LLP_REQUEST_QUEUE_FULL (1<<17) +#define MIPI_TX_HS_IRQ_LLP_REQUEST_QUEUE_ERROR (1<<18) +#define MIPI_TX_HS_IRQ_LLP_WORD_COUNT_ERROR (1<<20) +#define MIPI_TX_HS_IRQ_FRAME_DONE \ + (MIPI_TX_HS_IRQ_FRAME_DONE_0 | \ + MIPI_TX_HS_IRQ_FRAME_DONE_1 | \ + MIPI_TX_HS_IRQ_FRAME_DONE_2 | \ + MIPI_TX_HS_IRQ_FRAME_DONE_3) + +#define MIPI_TX_HS_IRQ_DMA_DONE \ + (MIPI_TX_HS_IRQ_DMA_DONE_0 | \ + MIPI_TX_HS_IRQ_DMA_DONE_1 | \ + MIPI_TX_HS_IRQ_DMA_DONE_2 | \ + MIPI_TX_HS_IRQ_DMA_DONE_3) + +#define MIPI_TX_HS_IRQ_DMA_IDLE \ + (MIPI_TX_HS_IRQ_DMA_IDLE_0 | \ + MIPI_TX_HS_IRQ_DMA_IDLE_1 | \ + MIPI_TX_HS_IRQ_DMA_IDLE_2 | \ + MIPI_TX_HS_IRQ_DMA_IDLE_3) + +#define MIPI_TX_HS_IRQ_ERROR \ + (MIPI_TX_HS_IRQ_MC_FIFO_UNDERFLOW | \ + MIPI_TX_HS_IRQ_MC_FIFO_OVERFLOW | \ + MIPI_TX_HS_IRQ_LLP_FIFO_EMPTY | \ + MIPI_TX_HS_IRQ_LLP_REQUEST_QUEUE_FULL | \ + MIPI_TX_HS_IRQ_LLP_REQUEST_QUEUE_ERROR | \ + MIPI_TX_HS_IRQ_LLP_WORD_COUNT_ERROR) + +#define MIPI_TX_HS_IRQ_ALL \ + (MIPI_TX_HS_IRQ_FRAME_DONE | \ + MIPI_TX_HS_IRQ_DMA_DONE | \ + MIPI_TX_HS_IRQ_DMA_IDLE | \ + MIPI_TX_HS_IRQ_LINE_COMPARE | \ + MIPI_TX_HS_IRQ_ERROR) + +#define MIPI_TX_HS_IRQ_ENABLE (0x020) +#define SET_HS_IRQ_ENABLE(M, val) \ + kmb_set_bitmask_mipi(MIPI_TX_HS_IRQ_ENABLE \ + + HS_OFFSET(M), val) +#define MIPI_TX_HS_IRQ_CLEAR (0x024) +#define SET_MIPI_TX_HS_IRQ_CLEAR(M, val) \ + kmb_set_bitmask_mipi(MIPI_TX_HS_IRQ_CLEAR \ + + HS_OFFSET(M), val) + /* D-PHY regs */ #define DPHY_ENABLE (0x100) #define DPHY_INIT_CTRL0 (0x104)