soc: imx: imx8m-blk-ctrl: add DISP blk-ctrl

This adds the description for the i.MX8MM disp blk-ctrl.
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Reviewed-by: Peng Fan <peng.fan@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

drivers/soc/imx/imx8m-blk-ctrl.c

@@ -431,11 +431,81 @@ static const struct imx8m_blk_ctrl_data imx8mm_vpu_blk_ctl_dev_data = {
 	.num_domains = ARRAY_SIZE(imx8mm_vpu_blk_ctl_domain_data),
 };
 
+static int imx8mm_disp_power_notifier(struct notifier_block *nb,
+				      unsigned long action, void *data)
+{
+	struct imx8m_blk_ctrl *bc = container_of(nb, struct imx8m_blk_ctrl,
+						 power_nb);
+
+	if (action != GENPD_NOTIFY_ON && action != GENPD_NOTIFY_PRE_OFF)
+		return NOTIFY_OK;
+
+	/* Enable bus clock and deassert bus reset */
+	regmap_set_bits(bc->regmap, BLK_CLK_EN, BIT(12));
+	regmap_set_bits(bc->regmap, BLK_SFT_RSTN, BIT(6));
+
+	/*
+	 * On power up we have no software backchannel to the GPC to
+	 * wait for the ADB handshake to happen, so we just delay for a
+	 * bit. On power down the GPC driver waits for the handshake.
+	 */
+	if (action == GENPD_NOTIFY_ON)
+		udelay(5);
+
+
+	return NOTIFY_OK;
+}
+
+static const struct imx8m_blk_ctrl_domain_data imx8mm_disp_blk_ctl_domain_data[] = {
+	[IMX8MM_DISPBLK_PD_CSI_BRIDGE] = {
+		.name = "dispblk-csi-bridge",
+		.clk_names = (const char *[]){ "csi-bridge-axi", "csi-bridge-apb",
+					       "csi-bridge-core", },
+		.num_clks = 3,
+		.gpc_name = "csi-bridge",
+		.rst_mask = BIT(0) | BIT(1) | BIT(2),
+		.clk_mask = BIT(0) | BIT(1) | BIT(2) | BIT(3) | BIT(4) | BIT(5),
+	},
+	[IMX8MM_DISPBLK_PD_LCDIF] = {
+		.name = "dispblk-lcdif",
+		.clk_names = (const char *[]){ "lcdif-axi", "lcdif-apb", "lcdif-pix", },
+		.num_clks = 3,
+		.gpc_name = "lcdif",
+		.clk_mask = BIT(6) | BIT(7),
+	},
+	[IMX8MM_DISPBLK_PD_MIPI_DSI] = {
+		.name = "dispblk-mipi-dsi",
+		.clk_names = (const char *[]){ "dsi-pclk", "dsi-ref", },
+		.num_clks = 2,
+		.gpc_name = "mipi-dsi",
+		.rst_mask = BIT(5),
+		.clk_mask = BIT(8) | BIT(9),
+	},
+	[IMX8MM_DISPBLK_PD_MIPI_CSI] = {
+		.name = "dispblk-mipi-csi",
+		.clk_names = (const char *[]){ "csi-aclk", "csi-pclk" },
+		.num_clks = 2,
+		.gpc_name = "mipi-csi",
+		.rst_mask = BIT(3) | BIT(4),
+		.clk_mask = BIT(10) | BIT(11),
+	},
+};
+
+static const struct imx8m_blk_ctrl_data imx8mm_disp_blk_ctl_dev_data = {
+	.max_reg = 0x2c,
+	.power_notifier_fn = imx8mm_disp_power_notifier,
+	.domains = imx8mm_disp_blk_ctl_domain_data,
+	.num_domains = ARRAY_SIZE(imx8mm_disp_blk_ctl_domain_data),
+};
+
 static const struct of_device_id imx8m_blk_ctrl_of_match[] = {
 	{
 		.compatible = "fsl,imx8mm-vpu-blk-ctrl",
 		.data = &imx8mm_vpu_blk_ctl_dev_data
 	}, {
+		.compatible = "fsl,imx8mm-disp-blk-ctrl",
+		.data = &imx8mm_disp_blk_ctl_dev_data
+	} ,{
 		/* Sentinel */
 	}
 };