From ebb7619d3ac85d7aae0a5e8d7038d32211ca7dba Mon Sep 17 00:00:00 2001 From: Fabio Estevam Date: Mon, 3 Apr 2023 23:01:29 -0300 Subject: drm/bridge: fsl-ldb: Add i.MX6SX support i.MX6SX has a single LVDS port and share a similar LDB_CTRL register layout with i.MX8MP and i.MX93. There is no LVDS CTRL register on the i.MX6SX, so only write to this register on the appropriate SoCs. Add support for the i.MX6SX LDB. Tested on a imx6sx-sdb board with a Hannstar HSD100PXN1 LVDS panel and also on a custom i.MX6SX-based board. Signed-off-by: Fabio Estevam Reviewed-by: Neil Armstrong Reviewed-by: Marek Vasut Signed-off-by: Marek Vasut Link: https://patchwork.freedesktop.org/patch/msgid/20230404020129.509356-2-festevam@gmail.com --- drivers/gpu/drm/bridge/fsl-ldb.c | 14 +++++++++++++- 1 file changed, 13 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/bridge/fsl-ldb.c b/drivers/gpu/drm/bridge/fsl-ldb.c index 682623369498..b8e52156b07a 100644 --- a/drivers/gpu/drm/bridge/fsl-ldb.c +++ b/drivers/gpu/drm/bridge/fsl-ldb.c @@ -56,6 +56,7 @@ #define LVDS_CTRL_VBG_ADJ_MASK GENMASK(19, 17) enum fsl_ldb_devtype { + IMX6SX_LDB, IMX8MP_LDB, IMX93_LDB, }; @@ -64,9 +65,14 @@ struct fsl_ldb_devdata { u32 ldb_ctrl; u32 lvds_ctrl; bool lvds_en_bit; + bool single_ctrl_reg; }; static const struct fsl_ldb_devdata fsl_ldb_devdata[] = { + [IMX6SX_LDB] = { + .ldb_ctrl = 0x18, + .single_ctrl_reg = true, + }, [IMX8MP_LDB] = { .ldb_ctrl = 0x5c, .lvds_ctrl = 0x128, @@ -201,6 +207,9 @@ static void fsl_ldb_atomic_enable(struct drm_bridge *bridge, regmap_write(fsl_ldb->regmap, fsl_ldb->devdata->ldb_ctrl, reg); + if (fsl_ldb->devdata->single_ctrl_reg) + return; + /* Program LVDS_CTRL */ reg = LVDS_CTRL_CC_ADJ(2) | LVDS_CTRL_PRE_EMPH_EN | LVDS_CTRL_PRE_EMPH_ADJ(3) | LVDS_CTRL_VBG_EN; @@ -226,7 +235,8 @@ static void fsl_ldb_atomic_disable(struct drm_bridge *bridge, regmap_write(fsl_ldb->regmap, fsl_ldb->devdata->lvds_ctrl, LVDS_CTRL_LVDS_EN); else - regmap_write(fsl_ldb->regmap, fsl_ldb->devdata->lvds_ctrl, 0); + if (!fsl_ldb->devdata->single_ctrl_reg) + regmap_write(fsl_ldb->regmap, fsl_ldb->devdata->lvds_ctrl, 0); regmap_write(fsl_ldb->regmap, fsl_ldb->devdata->ldb_ctrl, 0); clk_disable_unprepare(fsl_ldb->clk); @@ -372,6 +382,8 @@ static void fsl_ldb_remove(struct platform_device *pdev) } static const struct of_device_id fsl_ldb_match[] = { + { .compatible = "fsl,imx6sx-ldb", + .data = &fsl_ldb_devdata[IMX6SX_LDB], }, { .compatible = "fsl,imx8mp-ldb", .data = &fsl_ldb_devdata[IMX8MP_LDB], }, { .compatible = "fsl,imx93-ldb", -- cgit v1.2.3