Exynos MIPI DSI driver uses some static values such as address offsets,
register setting values, and etc. This patch makes the driver get those
values from the driver data.
Signed-off-by: Hyungwon Hwang <human.hwang@xxxxxxxxxxx>
---
Changes for v5:
- Newly added
drivers/gpu/drm/exynos/exynos_drm_dsi.c | 196 +++++++++++++++++++++++---------
1 file changed, 145 insertions(+), 51 deletions(-)
diff --git a/drivers/gpu/drm/exynos/exynos_drm_dsi.c b/drivers/gpu/drm/exynos/exynos_drm_dsi.c
index 1074dce..83e6798 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_dsi.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_dsi.c
@@ -33,38 +33,6 @@
/* returns true iff both arguments logically differs */
#define NEQV(a, b) (!(a) ^ !(b))
-#define DSIM_STATUS_REG 0x0 /* Status register */
-#define DSIM_SWRST_REG 0x4 /* Software reset register */
-#define DSIM_CLKCTRL_REG 0x8 /* Clock control register */
-#define DSIM_TIMEOUT_REG 0xc /* Time out register */
-#define DSIM_CONFIG_REG 0x10 /* Configuration register */
-#define DSIM_ESCMODE_REG 0x14 /* Escape mode register */
-
-/* Main display image resolution register */
-#define DSIM_MDRESOL_REG 0x18
-#define DSIM_MVPORCH_REG 0x1c /* Main display Vporch register */
-#define DSIM_MHPORCH_REG 0x20 /* Main display Hporch register */
-#define DSIM_MSYNC_REG 0x24 /* Main display sync area register */
-
-/* Sub display image resolution register */
-#define DSIM_SDRESOL_REG 0x28
-#define DSIM_INTSRC_REG 0x2c /* Interrupt source register */
-#define DSIM_INTMSK_REG 0x30 /* Interrupt mask register */
-#define DSIM_PKTHDR_REG 0x34 /* Packet Header FIFO register */
-#define DSIM_PAYLOAD_REG 0x38 /* Payload FIFO register */
-#define DSIM_RXFIFO_REG 0x3c /* Read FIFO register */
-#define DSIM_FIFOTHLD_REG 0x40 /* FIFO threshold level register */
-#define DSIM_FIFOCTRL_REG 0x44 /* FIFO status and control register */
-
-/* FIFO memory AC characteristic register */
-#define DSIM_PLLCTRL_REG 0x4c /* PLL control register */
-#define DSIM_PHYACCHR_REG 0x54 /* D-PHY AC characteristic register */
-#define DSIM_PHYACCHR1_REG 0x58 /* D-PHY AC characteristic register1 */
-#define DSIM_PHYCTRL_REG 0x5c
-#define DSIM_PHYTIMING_REG 0x64
-#define DSIM_PHYTIMING1_REG 0x68
-#define DSIM_PHYTIMING2_REG 0x6c
-
/* DSIM_STATUS */
#define DSIM_STOP_STATE_DAT(x) (((x) & 0xf) << 0)
#define DSIM_STOP_STATE_CLK (1 << 8)
@@ -128,8 +96,8 @@
/* DSIM_MDRESOL */
#define DSIM_MAIN_STAND_BY (1 << 31)
-#define DSIM_MAIN_VRESOL(x) (((x) & 0x7ff) << 16)
-#define DSIM_MAIN_HRESOL(x) (((x) & 0X7ff) << 0)
+#define DSIM_MAIN_VRESOL(x, num_bits) (((x) & ((1 << (num_bits)) - 1)) << 16)
+#define DSIM_MAIN_HRESOL(x, num_bits) (((x) & ((1 << (num_bits)) - 1)) << 0)
/* DSIM_MVPORCH */
#define DSIM_CMD_ALLOW(x) ((x) << 28)
@@ -234,8 +202,11 @@
#define DSI_XFER_TIMEOUT_MS 100
#define DSI_RX_FIFO_EMPTY 0x30800002
-#define DSI_WRITE(dsi, reg, val) writel((val), (dsi)->reg_base + (reg))
-#define DSI_READ(dsi, reg) readl((dsi)->reg_base + (reg))
+#define REG_ADDR(dsi, reg_idx) ((dsi)->reg_base + \
+ dsi->driver_data->reg_ofs[(reg_idx)])
+#define DSI_WRITE(dsi, reg_idx, val) writel((val), \
+ REG_ADDR((dsi), (reg_idx)))
+#define DSI_READ(dsi, reg_idx) readl(REG_ADDR((dsi), (reg_idx)))
enum exynos_dsi_transfer_type {
EXYNOS_DSI_TX,
@@ -264,10 +235,15 @@ struct exynos_dsi_transfer {
#define DSIM_STATE_CMD_LPM BIT(2)
struct exynos_dsi_driver_data {
+ unsigned int *reg_ofs;
unsigned int plltmr_reg;
-
unsigned int has_freqband:1;
unsigned int has_clklane_stop:1;
+ unsigned int num_clks;
+ unsigned int max_freq;
+ unsigned int wait_for_reset;
+ unsigned int num_bits_resol;
+ unsigned int *reg_values;
};
struct exynos_dsi {
@@ -312,25 +288,133 @@ static inline struct exynos_dsi *display_to_dsi(struct exynos_drm_display *d)
return container_of(d, struct exynos_dsi, display);
}
+enum reg_idx {
+ DSIM_STATUS_REG, /* Status register */
+ DSIM_SWRST_REG, /* Software reset register */
+ DSIM_CLKCTRL_REG, /* Clock control register */
+ DSIM_TIMEOUT_REG, /* Time out register */
+ DSIM_CONFIG_REG, /* Configuration register */
+ DSIM_ESCMODE_REG, /* Escape mode register */
+ DSIM_MDRESOL_REG,
+ DSIM_MVPORCH_REG, /* Main display Vporch register */
+ DSIM_MHPORCH_REG, /* Main display Hporch register */
+ DSIM_MSYNC_REG, /* Main display sync area register */
+ DSIM_INTSRC_REG, /* Interrupt source register */
+ DSIM_INTMSK_REG, /* Interrupt mask register */
+ DSIM_PKTHDR_REG, /* Packet Header FIFO register */
+ DSIM_PAYLOAD_REG, /* Payload FIFO register */
+ DSIM_RXFIFO_REG, /* Read FIFO register */
+ DSIM_FIFOCTRL_REG, /* FIFO status and control register */
+ DSIM_PLLCTRL_REG, /* PLL control register */
+ DSIM_PHYCTRL_REG,
+ DSIM_PHYTIMING_REG,
+ DSIM_PHYTIMING1_REG,
+ DSIM_PHYTIMING2_REG,
+ NUM_REGS
+};
+static unsigned int exynos_reg_ofs[] = {
+ [DSIM_STATUS_REG] = 0x00,
+ [DSIM_SWRST_REG] = 0x04,
+ [DSIM_CLKCTRL_REG] = 0x08,
+ [DSIM_TIMEOUT_REG] = 0x0c,
+ [DSIM_CONFIG_REG] = 0x10,
+ [DSIM_ESCMODE_REG] = 0x14,
+ [DSIM_MDRESOL_REG] = 0x18,
+ [DSIM_MVPORCH_REG] = 0x1c,
+ [DSIM_MHPORCH_REG] = 0x20,
+ [DSIM_MSYNC_REG] = 0x24,
+ [DSIM_INTSRC_REG] = 0x2c,
+ [DSIM_INTMSK_REG] = 0x30,
+ [DSIM_PKTHDR_REG] = 0x34,
+ [DSIM_PAYLOAD_REG] = 0x38,
+ [DSIM_RXFIFO_REG] = 0x3c,
+ [DSIM_FIFOCTRL_REG] = 0x44,
+ [DSIM_PLLCTRL_REG] = 0x4c,
+ [DSIM_PHYCTRL_REG] = 0x5c,
+ [DSIM_PHYTIMING_REG] = 0x64,
+ [DSIM_PHYTIMING1_REG] = 0x68,
+ [DSIM_PHYTIMING2_REG] = 0x6c,
+};
+
+enum reg_value_idx {
+ RESET_TYPE,
+ PLL_TIMER,
+ STOP_STATE_CNT,
+ PHYCTRL_ULPS_EXIT,
+ PHYCTRL_VREG_LP,
+ PHYCTRL_SLEW_UP,
+ PHYTIMING_LPX,
+ PHYTIMING_HS_EXIT,
+ PHYTIMING_CLK_PREPARE,
+ PHYTIMING_CLK_ZERO,
+ PHYTIMING_CLK_POST,
+ PHYTIMING_CLK_TRAIL,
+ PHYTIMING_HS_PREPARE,
+ PHYTIMING_HS_ZERO,
+ PHYTIMING_HS_TRAIL
+};
+
+static unsigned int reg_values[] = {
+ [RESET_TYPE] = DSIM_SWRST,
+ [PLL_TIMER] = 500,
+ [STOP_STATE_CNT] = 0xf,
+ [PHYCTRL_ULPS_EXIT] = DSIM_PHYCTRL_ULPS_EXIT(0x0af),
+ [PHYCTRL_VREG_LP] = 0,
+ [PHYCTRL_SLEW_UP] = 0,
+ [PHYTIMING_LPX] = DSIM_PHYTIMING_LPX(0x06),
+ [PHYTIMING_HS_EXIT] = DSIM_PHYTIMING_HS_EXIT(0x0b),
+ [PHYTIMING_CLK_PREPARE] = DSIM_PHYTIMING1_CLK_PREPARE(0x07),
+ [PHYTIMING_CLK_ZERO] = DSIM_PHYTIMING1_CLK_ZERO(0x27),
+ [PHYTIMING_CLK_POST] = DSIM_PHYTIMING1_CLK_POST(0x0d),
+ [PHYTIMING_CLK_TRAIL] = DSIM_PHYTIMING1_CLK_TRAIL(0x08),
+ [PHYTIMING_HS_PREPARE] = DSIM_PHYTIMING2_HS_PREPARE(0x09),
+ [PHYTIMING_HS_ZERO] = DSIM_PHYTIMING2_HS_ZERO(0x0d),
+ [PHYTIMING_HS_TRAIL] = DSIM_PHYTIMING2_HS_TRAIL(0x0b),
+};
+
static struct exynos_dsi_driver_data exynos3_dsi_driver_data = {
+ .reg_ofs = exynos_reg_ofs,
.plltmr_reg = 0x50,
.has_freqband = 1,
.has_clklane_stop = 1,
+ .num_clks = 2,
+ .max_freq = 1000,
+ .wait_for_reset = 1,
+ .num_bits_resol = 11,
+ .reg_values = reg_values,
};
static struct exynos_dsi_driver_data exynos4_dsi_driver_data = {
+ .reg_ofs = exynos_reg_ofs,
.plltmr_reg = 0x50,
.has_freqband = 1,
.has_clklane_stop = 1,
+ .num_clks = 2,
+ .max_freq = 1000,
+ .wait_for_reset = 1,
+ .num_bits_resol = 11,
+ .reg_values = reg_values,
};
static struct exynos_dsi_driver_data exynos4415_dsi_driver_data = {
+ .reg_ofs = exynos_reg_ofs,
.plltmr_reg = 0x58,
.has_clklane_stop = 1,
+ .num_clks = 2,
+ .max_freq = 1000,
+ .wait_for_reset = 1,
+ .num_bits_resol = 11,
+ .reg_values = reg_values,
};
static struct exynos_dsi_driver_data exynos5_dsi_driver_data = {
+ .reg_ofs = exynos_reg_ofs,
.plltmr_reg = 0x58,
+ .num_clks = 2,
+ .max_freq = 1000,
+ .wait_for_reset = 1,
+ .num_bits_resol = 11,
+ .reg_values = reg_values,
};
static struct of_device_id exynos_dsi_of_match[] = {
@@ -367,7 +451,7 @@ static void exynos_dsi_reset(struct exynos_dsi *dsi)
struct exynos_dsi_driver_data *driver_data = dsi->driver_data;
reinit_completion(&dsi->completed);
- DSI_WRITE(dsi, DSIM_SWRST_REG, DSIM_SWRST);
+ DSI_WRITE(dsi, DSIM_SWRST_REG, driver_data->reg_values[RESET_TYPE]);
}
#ifndef MHZ
@@ -401,7 +485,8 @@ static unsigned long exynos_dsi_pll_find_pms(struct exynos_dsi *dsi,
tmp = (u64)_m * fin;
do_div(tmp, _p);
- if (tmp < 500 * MHZ || tmp > 1000 * MHZ)
+ if (tmp < 500 * MHZ ||
+ tmp > driver_data->max_freq * MHZ)
continue;
tmp = (u64)_m * fin;
@@ -446,7 +531,8 @@ static unsigned long exynos_dsi_set_pll(struct exynos_dsi *dsi,
}
dev_dbg(dsi->dev, "PLL freq %lu, (p %d, m %d, s %d)\n", fout, p, m, s);
- writel(500, dsi->reg_base + driver_data->plltmr_reg);
+ writel(driver_data->reg_values[PLL_TIMER],
+ dsi->reg_base + driver_data->plltmr_reg);
reg = DSIM_PLL_EN | DSIM_PLL_P(p) | DSIM_PLL_M(m) | DSIM_PLL_S(s);
@@ -524,13 +610,15 @@ static int exynos_dsi_enable_clock(struct exynos_dsi *dsi)
static void exynos_dsi_set_phy_ctrl(struct exynos_dsi *dsi)
{
struct exynos_dsi_driver_data *driver_data = dsi->driver_data;
+ unsigned int *reg_values = driver_data->reg_values;
u32 reg;
if (driver_data->has_freqband)
return;
/* B D-PHY: D-PHY Master & Slave Analog Block control */
- reg = DSIM_PHYCTRL_ULPS_EXIT(0x0af);
+ reg = reg_values[PHYCTRL_ULPS_EXIT] | reg_values[PHYCTRL_VREG_LP] |
+ reg_values[PHYCTRL_SLEW_UP];
DSI_WRITE(dsi, DSIM_PHYCTRL_REG, reg);
/*
@@ -538,7 +626,7 @@ static void exynos_dsi_set_phy_ctrl(struct exynos_dsi *dsi)
* T HS-EXIT: Time that the transmitter drives LP-11 following a HS
* burst
*/
- reg = DSIM_PHYTIMING_LPX(0x06) | DSIM_PHYTIMING_HS_EXIT(0x0b);
+ reg = reg_values[PHYTIMING_LPX] | reg_values[PHYTIMING_HS_EXIT];
DSI_WRITE(dsi, DSIM_PHYTIMING_REG, reg);
/*
@@ -554,10 +642,11 @@ static void exynos_dsi_set_phy_ctrl(struct exynos_dsi *dsi)
* T CLK-TRAIL: Time that the transmitter drives the HS-0 state after
* the last payload clock bit of a HS transmission burst
*/
- reg = DSIM_PHYTIMING1_CLK_PREPARE(0x07) |
- DSIM_PHYTIMING1_CLK_ZERO(0x27) |
- DSIM_PHYTIMING1_CLK_POST(0x0d) |
- DSIM_PHYTIMING1_CLK_TRAIL(0x08);
+ reg = reg_values[PHYTIMING_CLK_PREPARE] |
+ reg_values[PHYTIMING_CLK_ZERO] |
+ reg_values[PHYTIMING_CLK_POST] |
+ reg_values[PHYTIMING_CLK_TRAIL];
+
DSI_WRITE(dsi, DSIM_PHYTIMING1_REG, reg);
/*
@@ -569,8 +658,8 @@ static void exynos_dsi_set_phy_ctrl(struct exynos_dsi *dsi)
* T HS-TRAIL: Time that the transmitter drives the flipped differential
* state after last payload data bit of a HS transmission burst
*/
- reg = DSIM_PHYTIMING2_HS_PREPARE(0x09) | DSIM_PHYTIMING2_HS_ZERO(0x0d) |
- DSIM_PHYTIMING2_HS_TRAIL(0x0b);
+ reg = reg_values[PHYTIMING_HS_PREPARE] | reg_values[PHYTIMING_HS_ZERO] |
+ reg_values[PHYTIMING_HS_TRAIL];
DSI_WRITE(dsi, DSIM_PHYTIMING2_REG, reg);
}
@@ -701,7 +790,7 @@ static int exynos_dsi_init_link(struct exynos_dsi *dsi)
reg = DSI_READ(dsi, DSIM_ESCMODE_REG);
reg &= ~DSIM_STOP_STATE_CNT_MASK;
- reg |= DSIM_STOP_STATE_CNT(0xf);
+ reg |= DSIM_STOP_STATE_CNT(driver_data->reg_values[STOP_STATE_CNT]);
DSI_WRITE(dsi, DSIM_ESCMODE_REG, reg);
reg = DSIM_BTA_TIMEOUT(0xff) | DSIM_LPDR_TIMEOUT(0xffff);
@@ -713,6 +802,7 @@ static int exynos_dsi_init_link(struct exynos_dsi *dsi)
static void exynos_dsi_set_display_mode(struct exynos_dsi *dsi)
{
struct videomode *vm = &dsi->vm;
+ unsigned int num_bits_resol = dsi->driver_data->num_bits_resol;
u32 reg;
if (dsi->mode_flags & MIPI_DSI_MODE_VIDEO) {
@@ -729,8 +819,9 @@ static void exynos_dsi_set_display_mode(struct exynos_dsi *dsi)
| DSIM_MAIN_HSA(vm->hsync_len);
DSI_WRITE(dsi, DSIM_MSYNC_REG, reg);
}
+ reg = DSIM_MAIN_HRESOL(vm->hactive, num_bits_resol) |
+ DSIM_MAIN_VRESOL(vm->vactive, num_bits_resol);
- reg = DSIM_MAIN_HRESOL(vm->hactive) | DSIM_MAIN_VRESOL(vm->vactive);
DSI_WRITE(dsi, DSIM_MDRESOL_REG, reg);
dev_dbg(dsi->dev, "LCD size = %dx%d\n", vm->hactive, vm->vactive);
@@ -1137,10 +1228,13 @@ static void exynos_dsi_disable_irq(struct exynos_dsi *dsi)
static int exynos_dsi_init(struct exynos_dsi *dsi)
{
+ struct exynos_dsi_driver_data *driver_data = dsi->driver_data;
+
exynos_dsi_reset(dsi);
exynos_dsi_enable_irq(dsi);
exynos_dsi_enable_clock(dsi);
- exynos_dsi_wait_for_reset(dsi);
+ if (driver_data->wait_for_reset)
+ exynos_dsi_wait_for_reset(dsi);
exynos_dsi_set_phy_ctrl(dsi);
exynos_dsi_init_link(dsi);
--
1.9.1
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