[PATCH v12 16/18] drm: bridge: samsung-dsim: Add i.MX8M Mini/Nano support

Jagan Teki
2023-01-26T14:56:09Z

Samsung MIPI DSIM master can also be found in i.MX8M Mini/Nano SoC.

Add compatible and associated driver_data for it.

Reviewed-by: Marek Vasut <marex@denx.de>
Reviewed-by: Frieder Schrempf <frieder.schrempf@kontron.de>
Acked-by: Robert Foss <robert.foss@linaro.org>
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>
---
Changes for v12:
- collect RB from Marek
Changes for v11:
- collect RB from Frieder
- collect ACK from Robert
Changes for v10, v9:
- none
Changed for v8:
- fix and update the comment
Changes for v7, v6:
- none
Changes for v3:
- enable DSIM_QUIRK_FIXUP_SYNC_POL quirk
Changes for v5:
- [mszyprow] rebased and adjusted to the new driver initialization
- drop quirk
Changes for v4:
- none
Changes for v3:
- enable DSIM_QUIRK_FIXUP_SYNC_POL quirk
Changes for v2:
- collect Laurent r-b
Changes for v1:
- none

drivers/gpu/drm/bridge/samsung-dsim.c | 44 +++++++++++++++++++++++++++
1 file changed, 44 insertions(+)

diff --git a/drivers/gpu/drm/bridge/samsung-dsim.c b/drivers/gpu/drm/bridge/samsung-dsim.c
index c90314c4d205..fd042dbcd8d6 100644
--- a/drivers/gpu/drm/bridge/samsung-dsim.c
+++ b/drivers/gpu/drm/bridge/samsung-dsim.c
@@ -376,6 +376,24 @@ 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,
@@ -437,6 +455,22 @@ 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,
+ /*
+ * Unlike Exynos, PLL_P(PMS_P) offset 14 is used in i.MX8M Mini/Nano/Plus
+ * downstream driver - drivers/gpu/drm/bridge/sec-dsim.c
+ */
+ .pll_p_offset = 14,
+ .reg_values = imx8mm_dsim_reg_values,
+};
+
static const struct samsung_dsim_driver_data *
samsung_dsim_types[DSIM_TYPE_COUNT] = {
[DSIM_TYPE_EXYNOS3250] = &exynos3_dsi_driver_data,
@@ -444,6 +478,7 @@ samsung_dsim_types[DSIM_TYPE_COUNT] = {
[DSIM_TYPE_EXYNOS5410] = &exynos5_dsi_driver_data,
[DSIM_TYPE_EXYNOS5422] = &exynos5422_dsi_driver_data,
[DSIM_TYPE_EXYNOS5433] = &exynos5433_dsi_driver_data,
+ [DSIM_TYPE_IMX8MM] = &imx8mm_dsi_driver_data,
};

static inline struct samsung_dsim *host_to_dsi(struct mipi_dsi_host *h)
@@ -1832,7 +1867,16 @@ 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 = DSIM_TYPE_IMX8MM,
+ .host_ops = &generic_dsim_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