[PATCH v7 10/10] drm: bridge: samsung-dsim: Add i.MX8MM support

Jagan Teki
2022-10-05T15:17:36Z

Samsung MIPI DSIM master can also be found in i.MX8MM SoC.

Add compatible and associated driver_data for it.

v7, v6:
* none

v3:
* enable DSIM_QUIRK_FIXUP_SYNC_POL quirk

v5:
* [mszyprow] rebased and adjusted to the new driver initialization
* drop quirk

v4:
* none

v3:
* enable DSIM_QUIRK_FIXUP_SYNC_POL quirk

v2:
* collect Laurent r-b

v1:
* none

Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>
---
drivers/gpu/drm/bridge/samsung-dsim.c | 45 +++++++++++++++++++++++++++
1 file changed, 45 insertions(+)

diff --git a/drivers/gpu/drm/bridge/samsung-dsim.c b/drivers/gpu/drm/bridge/samsung-dsim.c
index f5cd80641cea..1b5ba33dc635 100644
--- a/drivers/gpu/drm/bridge/samsung-dsim.c
+++ b/drivers/gpu/drm/bridge/samsung-dsim.c
@@ -360,6 +360,24 @@ static const unsigned int exynos5433_reg_values[] = {
[PHYTIMING_HS_TRAIL] = DSIM_PHYTIMING2_HS_TRAIL(0x0c),
};

+static const unsigned int imx8mm_dsim_reg_values[] = {
+ [RESET_TYPE] = DSIM_SWRST,
+ [PLL_TIMER] = 500,
+ [STOP_STATE_CNT] = 0xf,
+ [PHYCTRL_ULPS_EXIT] = 0,
+ [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(0x26),
+ [PHYTIMING_CLK_POST] = DSIM_PHYTIMING1_CLK_POST(0x0d),
+ [PHYTIMING_CLK_TRAIL] = DSIM_PHYTIMING1_CLK_TRAIL(0x08),
+ [PHYTIMING_HS_PREPARE] = DSIM_PHYTIMING2_HS_PREPARE(0x08),
+ [PHYTIMING_HS_ZERO] = DSIM_PHYTIMING2_HS_ZERO(0x0d),
+ [PHYTIMING_HS_TRAIL] = DSIM_PHYTIMING2_HS_TRAIL(0x0b),
+};
+
static const struct samsung_dsim_driver_data exynos3_dsi_driver_data = {
.reg_ofs = exynos_reg_ofs,
.plltmr_reg = 0x50,
@@ -421,6 +439,23 @@ static const struct samsung_dsim_driver_data exynos5422_dsi_driver_data = {
.reg_values = exynos5422_reg_values,
};

+static const struct samsung_dsim_driver_data imx8mm_dsi_driver_data = {
+ .reg_ofs = exynos5433_reg_ofs,
+ .plltmr_reg = 0xa0,
+ .has_clklane_stop = 1,
+ .num_clks = 2,
+ .max_freq = 2100,
+ .wait_for_reset = 0,
+ .num_bits_resol = 12,
+ /**
+ * FIXME:
+ * Offset value used from downstream drivers/gpu/drm/bridge/sec-dsim.c
+ * remove this comment if it is true else update the logic.
+ */
+ .pll_p_offset = 14,
+ .reg_values = imx8mm_dsim_reg_values,
+};
+
static const struct samsung_dsim_driver_data *
samsung_dsim_types[SAMSUNG_DSIM_TYPE_COUNT] = {
[SAMSUNG_DSIM_TYPE_EXYNOS3250] = &exynos3_dsi_driver_data,
@@ -428,6 +463,7 @@ samsung_dsim_types[SAMSUNG_DSIM_TYPE_COUNT] = {
[SAMSUNG_DSIM_TYPE_EXYNOS5410] = &exynos5_dsi_driver_data,
[SAMSUNG_DSIM_TYPE_EXYNOS5422] = &exynos5422_dsi_driver_data,
[SAMSUNG_DSIM_TYPE_EXYNOS5433] = &exynos5433_dsi_driver_data,
+ [SAMSUNG_DSIM_TYPE_IMX8MM] = &imx8mm_dsi_driver_data,
};

static inline struct samsung_dsim *host_to_dsi(struct mipi_dsi_host *h)
@@ -1788,7 +1824,16 @@ const struct dev_pm_ops samsung_dsim_pm_ops = {
};
EXPORT_SYMBOL_GPL(samsung_dsim_pm_ops);

+static const struct samsung_dsim_plat_data samsung_dsim_imx8mm_pdata = {
+ .hw_type = SAMSUNG_DSIM_TYPE_IMX8MM,
+ .host_ops = &samsung_dsim_generic_host_ops,
+};
+
static const struct of_device_id samsung_dsim_of_match[] = {
+ {
+ .compatible = "fsl,imx8mm-mipi-dsim",
+ .data = &samsung_dsim_imx8mm_pdata,
+ },
{ /* sentinel. */ }
};
MODULE_DEVICE_TABLE(of, samsung_dsim_of_match);
--
2.25.1