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soc: imx: add i.MX8MP HDMI blk-ctrl 

This adds driver support for the HDMI blk-ctrl found on the
i.MX8MP SoC.

Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
This commit is contained in:
Lucas Stach 2022-04-06 17:33:58 +02:00 committed by Shawn Guo
parent 07614fed00
commit e3442022f5
1 changed files with 193 additions and 0 deletions
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193
drivers/soc/imx/imx8mp-blk-ctrl.c
View File

@ -174,6 +174,196 @@ static const struct imx8mp_blk_ctrl_data imx8mp_hsio_blk_ctl_dev_data = {
.num_domains = ARRAY_SIZE(imx8mp_hsio_domain_data),
};
#define HDMI_RTX_RESET_CTL0 0x20
#define HDMI_RTX_CLK_CTL0 0x40
#define HDMI_RTX_CLK_CTL1 0x50
#define HDMI_RTX_CLK_CTL2 0x60
#define HDMI_RTX_CLK_CTL3 0x70
#define HDMI_RTX_CLK_CTL4 0x80
#define HDMI_TX_CONTROL0 0x200
static void imx8mp_hdmi_blk_ctrl_power_on(struct imx8mp_blk_ctrl *bc,
struct imx8mp_blk_ctrl_domain *domain)
{
switch (domain->id) {
case IMX8MP_HDMIBLK_PD_IRQSTEER:
regmap_set_bits(bc->regmap, HDMI_RTX_CLK_CTL0, BIT(9));
regmap_set_bits(bc->regmap, HDMI_RTX_RESET_CTL0, BIT(16));
break;
case IMX8MP_HDMIBLK_PD_LCDIF:
regmap_set_bits(bc->regmap, HDMI_RTX_CLK_CTL0,
BIT(7) | BIT(16) | BIT(17) | BIT(18) |
BIT(19) | BIT(20));
regmap_set_bits(bc->regmap, HDMI_RTX_CLK_CTL1, BIT(11));
regmap_set_bits(bc->regmap, HDMI_RTX_RESET_CTL0,
BIT(4) | BIT(5) | BIT(6));
break;
case IMX8MP_HDMIBLK_PD_PAI:
regmap_set_bits(bc->regmap, HDMI_RTX_CLK_CTL1, BIT(17));
regmap_set_bits(bc->regmap, HDMI_RTX_RESET_CTL0, BIT(18));
break;
case IMX8MP_HDMIBLK_PD_PVI:
regmap_set_bits(bc->regmap, HDMI_RTX_CLK_CTL1, BIT(28));
regmap_set_bits(bc->regmap, HDMI_RTX_RESET_CTL0, BIT(22));
break;
case IMX8MP_HDMIBLK_PD_TRNG:
regmap_set_bits(bc->regmap, HDMI_RTX_CLK_CTL1, BIT(27) | BIT(30));
regmap_set_bits(bc->regmap, HDMI_RTX_RESET_CTL0, BIT(20));
break;
case IMX8MP_HDMIBLK_PD_HDMI_TX:
regmap_set_bits(bc->regmap, HDMI_RTX_CLK_CTL0,
BIT(2) | BIT(4) | BIT(5));
regmap_set_bits(bc->regmap, HDMI_RTX_CLK_CTL1,
BIT(12) | BIT(13) | BIT(14) | BIT(15) | BIT(16) |
BIT(18) | BIT(19) | BIT(20) | BIT(21));
regmap_set_bits(bc->regmap, HDMI_RTX_RESET_CTL0,
BIT(7) | BIT(10) | BIT(11));
regmap_set_bits(bc->regmap, HDMI_TX_CONTROL0, BIT(1));
break;
case IMX8MP_HDMIBLK_PD_HDMI_TX_PHY:
regmap_set_bits(bc->regmap, HDMI_RTX_CLK_CTL1, BIT(22) | BIT(24));
regmap_set_bits(bc->regmap, HDMI_RTX_RESET_CTL0, BIT(12));
regmap_clear_bits(bc->regmap, HDMI_TX_CONTROL0, BIT(3));
break;
default:
break;
}
}
static void imx8mp_hdmi_blk_ctrl_power_off(struct imx8mp_blk_ctrl *bc,
struct imx8mp_blk_ctrl_domain *domain)
{
switch (domain->id) {
case IMX8MP_HDMIBLK_PD_IRQSTEER:
regmap_clear_bits(bc->regmap, HDMI_RTX_CLK_CTL0, BIT(9));
regmap_clear_bits(bc->regmap, HDMI_RTX_RESET_CTL0, BIT(16));
break;
case IMX8MP_HDMIBLK_PD_LCDIF:
regmap_clear_bits(bc->regmap, HDMI_RTX_RESET_CTL0,
BIT(4) | BIT(5) | BIT(6));
regmap_clear_bits(bc->regmap, HDMI_RTX_CLK_CTL1, BIT(11));
regmap_clear_bits(bc->regmap, HDMI_RTX_CLK_CTL0,
BIT(7) | BIT(16) | BIT(17) | BIT(18) |
BIT(19) | BIT(20));
break;
case IMX8MP_HDMIBLK_PD_PAI:
regmap_clear_bits(bc->regmap, HDMI_RTX_RESET_CTL0, BIT(18));
regmap_clear_bits(bc->regmap, HDMI_RTX_CLK_CTL1, BIT(17));
break;
case IMX8MP_HDMIBLK_PD_PVI:
regmap_clear_bits(bc->regmap, HDMI_RTX_RESET_CTL0, BIT(22));
regmap_clear_bits(bc->regmap, HDMI_RTX_CLK_CTL1, BIT(28));
break;
case IMX8MP_HDMIBLK_PD_TRNG:
regmap_clear_bits(bc->regmap, HDMI_RTX_RESET_CTL0, BIT(20));
regmap_clear_bits(bc->regmap, HDMI_RTX_CLK_CTL1, BIT(27) | BIT(30));
break;
case IMX8MP_HDMIBLK_PD_HDMI_TX:
regmap_clear_bits(bc->regmap, HDMI_TX_CONTROL0, BIT(1));
regmap_clear_bits(bc->regmap, HDMI_RTX_RESET_CTL0,
BIT(7) | BIT(10) | BIT(11));
regmap_clear_bits(bc->regmap, HDMI_RTX_CLK_CTL1,
BIT(12) | BIT(13) | BIT(14) | BIT(15) | BIT(16) |
BIT(18) | BIT(19) | BIT(20) | BIT(21));
regmap_clear_bits(bc->regmap, HDMI_RTX_CLK_CTL0,
BIT(2) | BIT(4) | BIT(5));
break;
case IMX8MP_HDMIBLK_PD_HDMI_TX_PHY:
regmap_set_bits(bc->regmap, HDMI_TX_CONTROL0, BIT(3));
regmap_clear_bits(bc->regmap, HDMI_RTX_RESET_CTL0, BIT(12));
regmap_clear_bits(bc->regmap, HDMI_RTX_CLK_CTL1, BIT(22) | BIT(24));
break;
default:
break;
}
}
static int imx8mp_hdmi_power_notifier(struct notifier_block *nb,
unsigned long action, void *data)
{
struct imx8mp_blk_ctrl *bc = container_of(nb, struct imx8mp_blk_ctrl,
power_nb);
if (action != GENPD_NOTIFY_ON)
return NOTIFY_OK;
/*
* Contrary to other blk-ctrls the reset and clock don't clear when the
* power domain is powered down. To ensure the proper reset pulsing,
* first clear them all to asserted state, then enable the bus clocks
* and then release the ADB reset.
*/
regmap_write(bc->regmap, HDMI_RTX_RESET_CTL0, 0x0);
regmap_write(bc->regmap, HDMI_RTX_CLK_CTL0, 0x0);
regmap_write(bc->regmap, HDMI_RTX_CLK_CTL1, 0x0);
regmap_set_bits(bc->regmap, HDMI_RTX_CLK_CTL0,
BIT(0) | BIT(1) | BIT(10));
regmap_set_bits(bc->regmap, HDMI_RTX_RESET_CTL0, BIT(0));
/*
* 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.
*/
udelay(5);
return NOTIFY_OK;
}
static const struct imx8mp_blk_ctrl_domain_data imx8mp_hdmi_domain_data[] = {
[IMX8MP_HDMIBLK_PD_IRQSTEER] = {
.name = "hdmiblk-irqsteer",
.clk_names = (const char *[]){ "apb" },
.num_clks = 1,
.gpc_name = "irqsteer",
},
[IMX8MP_HDMIBLK_PD_LCDIF] = {
.name = "hdmiblk-lcdif",
.clk_names = (const char *[]){ "axi", "apb" },
.num_clks = 2,
.gpc_name = "lcdif",
},
[IMX8MP_HDMIBLK_PD_PAI] = {
.name = "hdmiblk-pai",
.clk_names = (const char *[]){ "apb" },
.num_clks = 1,
.gpc_name = "pai",
},
[IMX8MP_HDMIBLK_PD_PVI] = {
.name = "hdmiblk-pvi",
.clk_names = (const char *[]){ "apb" },
.num_clks = 1,
.gpc_name = "pvi",
},
[IMX8MP_HDMIBLK_PD_TRNG] = {
.name = "hdmiblk-trng",
.clk_names = (const char *[]){ "apb" },
.num_clks = 1,
.gpc_name = "trng",
},
[IMX8MP_HDMIBLK_PD_HDMI_TX] = {
.name = "hdmiblk-hdmi-tx",
.clk_names = (const char *[]){ "apb", "ref_266m" },
.num_clks = 2,
.gpc_name = "hdmi-tx",
},
[IMX8MP_HDMIBLK_PD_HDMI_TX_PHY] = {
.name = "hdmiblk-hdmi-tx-phy",
.clk_names = (const char *[]){ "apb", "ref_24m" },
.num_clks = 2,
.gpc_name = "hdmi-tx-phy",
},
};
static const struct imx8mp_blk_ctrl_data imx8mp_hdmi_blk_ctl_dev_data = {
.max_reg = 0x23c,
.power_on = imx8mp_hdmi_blk_ctrl_power_on,
.power_off = imx8mp_hdmi_blk_ctrl_power_off,
.power_notifier_fn = imx8mp_hdmi_power_notifier,
.domains = imx8mp_hdmi_domain_data,
.num_domains = ARRAY_SIZE(imx8mp_hdmi_domain_data),
};
static int imx8mp_blk_ctrl_power_on(struct generic_pm_domain *genpd)
{
struct imx8mp_blk_ctrl_domain *domain = to_imx8mp_blk_ctrl_domain(genpd);
@ -485,6 +675,9 @@ static const struct of_device_id imx8mp_blk_ctrl_of_match[] = {
{
.compatible = "fsl,imx8mp-hsio-blk-ctrl",
.data = &imx8mp_hsio_blk_ctl_dev_data,
}, {
.compatible = "fsl,imx8mp-hdmi-blk-ctrl",
.data = &imx8mp_hdmi_blk_ctl_dev_data,
}, {
/* Sentinel */
}