This patch adds support for Exynos5433 mipi dsi.
Signed-off-by: Hyungwon Hwang human.hwang@samsung.com --- Changes before: - Refer https://patchwork.kernel.org/patch/6191811 Changes for v6: - Change the order of DSIM_CONFIG_REG register - Add error checking code in probe function
.../devicetree/bindings/video/exynos_dsim.txt | 1 + drivers/gpu/drm/exynos/Kconfig | 2 +- drivers/gpu/drm/exynos/exynos_drm_dsi.c | 100 +++++++++++++++++---- 3 files changed, 87 insertions(+), 16 deletions(-)
diff --git a/Documentation/devicetree/bindings/video/exynos_dsim.txt b/Documentation/devicetree/bindings/video/exynos_dsim.txt index 44659dd..11ccac9 100644 --- a/Documentation/devicetree/bindings/video/exynos_dsim.txt +++ b/Documentation/devicetree/bindings/video/exynos_dsim.txt @@ -6,6 +6,7 @@ Required properties: "samsung,exynos4210-mipi-dsi" /* for Exynos4 SoCs */ "samsung,exynos4415-mipi-dsi" /* for Exynos4415 SoC */ "samsung,exynos5410-mipi-dsi" /* for Exynos5410/5420/5440 SoCs */ + "samsung,exynos5433-mipi-dsi" /* for Exynos5433 SoCs */ - reg: physical base address and length of the registers set for the device - interrupts: should contain DSI interrupt - clocks: list of clock specifiers, must contain an entry for each required diff --git a/drivers/gpu/drm/exynos/Kconfig b/drivers/gpu/drm/exynos/Kconfig index 12e4e62..43003c4 100644 --- a/drivers/gpu/drm/exynos/Kconfig +++ b/drivers/gpu/drm/exynos/Kconfig @@ -47,7 +47,7 @@ config DRM_EXYNOS_DPI
config DRM_EXYNOS_DSI bool "EXYNOS DRM MIPI-DSI driver support" - depends on DRM_EXYNOS && (DRM_EXYNOS_FIMD || DRM_EXYNOS7_DECON) + depends on DRM_EXYNOS && (DRM_EXYNOS_FIMD || DRM_EXYNOS5433_DECON || DRM_EXYNOS7_DECON) select DRM_MIPI_DSI select DRM_PANEL default n diff --git a/drivers/gpu/drm/exynos/exynos_drm_dsi.c b/drivers/gpu/drm/exynos/exynos_drm_dsi.c index 557b9d2..d9bcdb9 100644 --- a/drivers/gpu/drm/exynos/exynos_drm_dsi.c +++ b/drivers/gpu/drm/exynos/exynos_drm_dsi.c @@ -132,6 +132,7 @@ #define DSIM_INT_PLL_STABLE (1 << 31) #define DSIM_INT_SW_RST_RELEASE (1 << 30) #define DSIM_INT_SFR_FIFO_EMPTY (1 << 29) +#define DSIM_INT_SFR_HDR_FIFO_EMPTY (1 << 28) #define DSIM_INT_BTA (1 << 25) #define DSIM_INT_FRAME_DONE (1 << 24) #define DSIM_INT_RX_TIMEOUT (1 << 21) @@ -180,6 +181,8 @@
/* DSIM_PHYCTRL */ #define DSIM_PHYCTRL_ULPS_EXIT(x) (((x) & 0x1ff) << 0) +#define DSIM_PHYCTRL_B_DPHYCTL_VREG_LP (1 << 30) +#define DSIM_PHYCTRL_B_DPHYCTL_SLEW_UP (1 << 14)
/* DSIM_PHYTIMING */ #define DSIM_PHYTIMING_LPX(x) ((x) << 8) @@ -211,7 +214,9 @@ REG_ADDR((dsi), (reg_idx))) #define DSI_READ(dsi, reg_idx) readl(REG_ADDR((dsi), (reg_idx)))
-static char *clk_names[2] = { "bus_clk", "sclk_mipi" }; +static char *clk_names[5] = { "bus_clk", "sclk_mipi", + "phyclk_mipidphy0_bitclkdiv8", "phyclk_mipidphy0_rxclkesc0", + "sclk_rgb_vclk_to_dsim0" };
enum exynos_dsi_transfer_type { EXYNOS_DSI_TX, @@ -341,6 +346,30 @@ static unsigned int exynos_reg_ofs[] = { [DSIM_PHYTIMING2_REG] = 0x6c, };
+static unsigned int exynos5433_reg_ofs[] = { + [DSIM_STATUS_REG] = 0x04, + [DSIM_SWRST_REG] = 0x0C, + [DSIM_CLKCTRL_REG] = 0x10, + [DSIM_TIMEOUT_REG] = 0x14, + [DSIM_CONFIG_REG] = 0x18, + [DSIM_ESCMODE_REG] = 0x1C, + [DSIM_MDRESOL_REG] = 0x20, + [DSIM_MVPORCH_REG] = 0x24, + [DSIM_MHPORCH_REG] = 0x28, + [DSIM_MSYNC_REG] = 0x2C, + [DSIM_INTSRC_REG] = 0x34, + [DSIM_INTMSK_REG] = 0x38, + [DSIM_PKTHDR_REG] = 0x3C, + [DSIM_PAYLOAD_REG] = 0x40, + [DSIM_RXFIFO_REG] = 0x44, + [DSIM_FIFOCTRL_REG] = 0x4C, + [DSIM_PLLCTRL_REG] = 0x94, + [DSIM_PHYCTRL_REG] = 0xA4, + [DSIM_PHYTIMING_REG] = 0xB4, + [DSIM_PHYTIMING1_REG] = 0xB8, + [DSIM_PHYTIMING2_REG] = 0xBC, +}; + enum reg_value_idx { RESET_TYPE, PLL_TIMER, @@ -377,6 +406,24 @@ static unsigned int reg_values[] = { [PHYTIMING_HS_TRAIL] = DSIM_PHYTIMING2_HS_TRAIL(0x0b), };
+static unsigned int exynos5433_reg_values[] = { + [RESET_TYPE] = DSIM_FUNCRST, + [PLL_TIMER] = 22200, + [STOP_STATE_CNT] = 0xa, + [PHYCTRL_ULPS_EXIT] = DSIM_PHYCTRL_ULPS_EXIT(0x190), + [PHYCTRL_VREG_LP] = DSIM_PHYCTRL_B_DPHYCTL_VREG_LP, + [PHYCTRL_SLEW_UP] = DSIM_PHYCTRL_B_DPHYCTL_SLEW_UP, + [PHYTIMING_LPX] = DSIM_PHYTIMING_LPX(0x07), + [PHYTIMING_HS_EXIT] = DSIM_PHYTIMING_HS_EXIT(0x0c), + [PHYTIMING_CLK_PREPARE] = DSIM_PHYTIMING1_CLK_PREPARE(0x09), + [PHYTIMING_CLK_ZERO] = DSIM_PHYTIMING1_CLK_ZERO(0x2d), + [PHYTIMING_CLK_POST] = DSIM_PHYTIMING1_CLK_POST(0x0e), + [PHYTIMING_CLK_TRAIL] = DSIM_PHYTIMING1_CLK_TRAIL(0x09), + [PHYTIMING_HS_PREPARE] = DSIM_PHYTIMING2_HS_PREPARE(0x0b), + [PHYTIMING_HS_ZERO] = DSIM_PHYTIMING2_HS_ZERO(0x10), + [PHYTIMING_HS_TRAIL] = DSIM_PHYTIMING2_HS_TRAIL(0x0c), +}; + static struct exynos_dsi_driver_data exynos3_dsi_driver_data = { .reg_ofs = exynos_reg_ofs, .plltmr_reg = 0x50, @@ -422,6 +469,17 @@ static struct exynos_dsi_driver_data exynos5_dsi_driver_data = { .reg_values = reg_values, };
+static struct exynos_dsi_driver_data exynos5433_dsi_driver_data = { + .reg_ofs = exynos5433_reg_ofs, + .plltmr_reg = 0xa0, + .has_clklane_stop = 1, + .num_clks = 5, + .max_freq = 1500, + .wait_for_reset = 0, + .num_bits_resol = 12, + .reg_values = exynos5433_reg_values, +}; + static struct of_device_id exynos_dsi_of_match[] = { { .compatible = "samsung,exynos3250-mipi-dsi", .data = &exynos3_dsi_driver_data }, @@ -431,6 +489,8 @@ static struct of_device_id exynos_dsi_of_match[] = { .data = &exynos4415_dsi_driver_data }, { .compatible = "samsung,exynos5410-mipi-dsi", .data = &exynos5_dsi_driver_data }, + { .compatible = "samsung,exynos5433-mipi-dsi", + .data = &exynos5433_dsi_driver_data }, { } };
@@ -682,6 +742,14 @@ static void exynos_dsi_disable_clock(struct exynos_dsi *dsi) DSI_WRITE(dsi, DSIM_PLLCTRL_REG, reg); }
+static void exynos_dsi_enable_lane(struct exynos_dsi *dsi, u32 lane) +{ + u32 reg = DSI_READ(dsi, DSIM_CONFIG_REG); + reg |= (DSIM_NUM_OF_DATA_LANE(dsi->lanes - 1) | DSIM_LANE_EN_CLK | + DSIM_LANE_EN(lane)); + DSI_WRITE(dsi, DSIM_CONFIG_REG, reg); +} + static int exynos_dsi_init_link(struct exynos_dsi *dsi) { struct exynos_dsi_driver_data *driver_data = dsi->driver_data; @@ -754,17 +822,6 @@ static int exynos_dsi_init_link(struct exynos_dsi *dsi) return -EINVAL; }
- reg |= DSIM_NUM_OF_DATA_LANE(dsi->lanes - 1); - - DSI_WRITE(dsi, DSIM_CONFIG_REG, reg); - - reg |= DSIM_LANE_EN_CLK; - DSI_WRITE(dsi, DSIM_CONFIG_REG, reg); - - lanes_mask = BIT(dsi->lanes) - 1; - reg |= DSIM_LANE_EN(lanes_mask); - DSI_WRITE(dsi, DSIM_CONFIG_REG, reg); - /* * Use non-continuous clock mode if the periparal wants and * host controller supports @@ -776,8 +833,11 @@ static int exynos_dsi_init_link(struct exynos_dsi *dsi) if (driver_data->has_clklane_stop && dsi->mode_flags & MIPI_DSI_CLOCK_NON_CONTINUOUS) { reg |= DSIM_CLKLANE_STOP; - DSI_WRITE(dsi, DSIM_CONFIG_REG, reg); } + DSI_WRITE(dsi, DSIM_CONFIG_REG, reg); + + lanes_mask = BIT(dsi->lanes) - 1; + exynos_dsi_enable_lane(dsi, lanes_mask);
/* Check clock and data lane state are stop state */ timeout = 100; @@ -1189,13 +1249,16 @@ static irqreturn_t exynos_dsi_irq(int irq, void *dev_id) DSI_WRITE(dsi, DSIM_INTSRC_REG, status);
if (status & DSIM_INT_SW_RST_RELEASE) { - u32 mask = ~(DSIM_INT_RX_DONE | DSIM_INT_SFR_FIFO_EMPTY); + u32 mask = ~(DSIM_INT_RX_DONE | DSIM_INT_SFR_FIFO_EMPTY | + DSIM_INT_SFR_HDR_FIFO_EMPTY | DSIM_INT_FRAME_DONE | + DSIM_INT_RX_ECC_ERR | DSIM_INT_SW_RST_RELEASE); DSI_WRITE(dsi, DSIM_INTMSK_REG, mask); complete(&dsi->completed); return IRQ_HANDLED; }
- if (!(status & (DSIM_INT_RX_DONE | DSIM_INT_SFR_FIFO_EMPTY))) + if (!(status & (DSIM_INT_RX_DONE | DSIM_INT_SFR_FIFO_EMPTY | + DSIM_INT_FRAME_DONE | DSIM_INT_PLL_STABLE))) return IRQ_HANDLED;
if (exynos_dsi_transfer_finish(dsi)) @@ -1237,6 +1300,10 @@ static int exynos_dsi_init(struct exynos_dsi *dsi)
exynos_dsi_reset(dsi); exynos_dsi_enable_irq(dsi); + + if (driver_data->reg_values[RESET_TYPE] == DSIM_FUNCRST) + exynos_dsi_enable_lane(dsi, BIT(dsi->lanes) - 1); + exynos_dsi_enable_clock(dsi); if (driver_data->wait_for_reset) exynos_dsi_wait_for_reset(dsi); @@ -1811,6 +1878,9 @@ static int exynos_dsi_probe(struct platform_device *pdev) dsi->clks = devm_kzalloc(dev, sizeof(*dsi->clks) * dsi->driver_data->num_clks, GFP_KERNEL); + if (!dsi->clks) + return -ENOMEM; + for (i = 0; i < dsi->driver_data->num_clks; i++) { dsi->clks[i] = devm_clk_get(dev, clk_names[i]); if (IS_ERR(dsi->clks[i])) { -- 1.9.1