[PATCH 13/19] drm/sun4i: hdmi: Add support for controller hardware variants
Chen-Yu Tsai
wens at csie.org
Fri Jun 2 03:10:18 PDT 2017
The HDMI controller found in earlier Allwinner SoCs have slight
differences:
- Need different initial values for the PLL related registers
- Different behavior of the DDC and TMDS clocks
- Different register layout for the DDC portion
- Separate DDC parent clock on the A31
- Explicit reset control
The clock variants are supported within their implementations,
which only expose a create function for each variant.
The different layout of the DDC registers necessitates a separate
version of struct drm_connector_helper_funcs.
A new variant data structure is created to store pointers to the
above functions, structures, and the different initial values.
Another flag notates whether there is a separate DDC parent clock.
If not, the TMDS clock is passed to the DDC clock create function,
as before.
Signed-off-by: Chen-Yu Tsai <wens at csie.org>
---
drivers/clk/sunxi-ng/ccu-sun6i-a31.c | 2 +-
drivers/gpu/drm/sun4i/sun4i_hdmi.h | 8 +++
drivers/gpu/drm/sun4i/sun4i_hdmi_enc.c | 114 ++++++++++++++++++++++++++-------
3 files changed, 100 insertions(+), 24 deletions(-)
diff --git a/drivers/clk/sunxi-ng/ccu-sun6i-a31.c b/drivers/clk/sunxi-ng/ccu-sun6i-a31.c
index 4d6078fca9ac..e48186985a51 100644
--- a/drivers/clk/sunxi-ng/ccu-sun6i-a31.c
+++ b/drivers/clk/sunxi-ng/ccu-sun6i-a31.c
@@ -610,7 +610,7 @@ static SUNXI_CCU_M_WITH_MUX_GATE(hdmi_clk, "hdmi", lcd_ch1_parents,
static SUNXI_CCU_GATE(hdmi_ddc_clk, "hdmi-ddc", "osc24M", 0x150, BIT(30), 0);
-static SUNXI_CCU_GATE(ps_clk, "ps", "lcd1-ch1", 0x140, BIT(31), 0);
+static SUNXI_CCU_GATE(ps_clk, "ps", "lcd1-ch1", 0x154, BIT(31), 0);
static const char * const mbus_parents[] = { "osc24M", "pll-periph",
"pll-ddr" };
diff --git a/drivers/gpu/drm/sun4i/sun4i_hdmi.h b/drivers/gpu/drm/sun4i/sun4i_hdmi.h
index c39c2a245339..c63d0bd95963 100644
--- a/drivers/gpu/drm/sun4i/sun4i_hdmi.h
+++ b/drivers/gpu/drm/sun4i/sun4i_hdmi.h
@@ -155,6 +155,8 @@ enum sun4i_hdmi_pkt_type {
SUN4I_HDMI_PKT_END = 15,
};
+struct sun4i_hdmi_variant;
+
struct sun4i_hdmi {
struct drm_connector connector;
struct drm_encoder encoder;
@@ -162,9 +164,13 @@ struct sun4i_hdmi {
void __iomem *base;
+ /* Reset control */
+ struct reset_control *reset;
+
/* Parent clocks */
struct clk *bus_clk;
struct clk *mod_clk;
+ struct clk *ddc_parent_clk;
struct clk *pll0_clk;
struct clk *pll1_clk;
@@ -175,6 +181,8 @@ struct sun4i_hdmi {
struct sun4i_drv *drv;
bool hdmi_monitor;
+
+ const struct sun4i_hdmi_variant *variant;
};
int sun4i_ddc_create(struct sun4i_hdmi *hdmi, struct clk *clk);
diff --git a/drivers/gpu/drm/sun4i/sun4i_hdmi_enc.c b/drivers/gpu/drm/sun4i/sun4i_hdmi_enc.c
index 457614073501..9ded40aaed32 100644
--- a/drivers/gpu/drm/sun4i/sun4i_hdmi_enc.c
+++ b/drivers/gpu/drm/sun4i/sun4i_hdmi_enc.c
@@ -20,8 +20,10 @@
#include <linux/clk.h>
#include <linux/component.h>
#include <linux/iopoll.h>
+#include <linux/of_device.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
+#include <linux/reset.h>
#include "sun4i_backend.h"
#include "sun4i_crtc.h"
@@ -315,6 +317,56 @@ static const struct drm_connector_funcs sun4i_hdmi_connector_funcs = {
.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
};
+struct sun4i_hdmi_variant {
+ const struct drm_connector_helper_funcs *connector_helpers;
+ int (*ddc_create)(struct sun4i_hdmi *hdmi, struct clk *clk);
+ int (*tmds_create)(struct sun4i_hdmi *hdmi);
+ bool has_ddc_parent_clk;
+ bool has_reset_control;
+
+ u32 pad_ctrl0_init_val;
+ u32 pad_ctrl1_init_val;
+ u32 pll_ctrl_init_val;
+};
+
+#define SUN4I_HDMI_PAD_CTRL1_MASK (GENMASK(24, 7) | GENMASK(5, 0))
+#define SUN4I_HDMI_PLL_CTRL_MASK (GENMASK(31, 8) | GENMASK(3, 0))
+
+static const struct sun4i_hdmi_variant sun5i_variant = {
+ .connector_helpers = &sun4i_hdmi_connector_helper_funcs,
+ .ddc_create = sun4i_ddc_create,
+ .tmds_create = sun4i_tmds_create,
+ .has_ddc_parent_clk = false,
+ .has_reset_control = false,
+ .pad_ctrl0_init_val = SUN4I_HDMI_PAD_CTRL0_TXEN |
+ SUN4I_HDMI_PAD_CTRL0_CKEN |
+ SUN4I_HDMI_PAD_CTRL0_PWENG |
+ SUN4I_HDMI_PAD_CTRL0_PWEND |
+ SUN4I_HDMI_PAD_CTRL0_PWENC |
+ SUN4I_HDMI_PAD_CTRL0_LDODEN |
+ SUN4I_HDMI_PAD_CTRL0_LDOCEN |
+ SUN4I_HDMI_PAD_CTRL0_BIASEN,
+ .pad_ctrl1_init_val = SUN4I_HDMI_PAD_CTRL1_REG_AMP(6) |
+ SUN4I_HDMI_PAD_CTRL1_REG_EMP(2) |
+ SUN4I_HDMI_PAD_CTRL1_REG_DENCK |
+ SUN4I_HDMI_PAD_CTRL1_REG_DEN |
+ SUN4I_HDMI_PAD_CTRL1_EMPCK_OPT |
+ SUN4I_HDMI_PAD_CTRL1_EMP_OPT |
+ SUN4I_HDMI_PAD_CTRL1_AMPCK_OPT |
+ SUN4I_HDMI_PAD_CTRL1_AMP_OPT,
+ .pll_ctrl_init_val = SUN4I_HDMI_PLL_CTRL_VCO_S(8) |
+ SUN4I_HDMI_PLL_CTRL_CS(7) |
+ SUN4I_HDMI_PLL_CTRL_CP_S(15) |
+ SUN4I_HDMI_PLL_CTRL_S(7) |
+ SUN4I_HDMI_PLL_CTRL_VCO_GAIN(4) |
+ SUN4I_HDMI_PLL_CTRL_SDIV2 |
+ SUN4I_HDMI_PLL_CTRL_LDO2_EN |
+ SUN4I_HDMI_PLL_CTRL_LDO1_EN |
+ SUN4I_HDMI_PLL_CTRL_HV_IS_33 |
+ SUN4I_HDMI_PLL_CTRL_BWS |
+ SUN4I_HDMI_PLL_CTRL_PLL_EN,
+};
+
static int sun4i_hdmi_bind(struct device *dev, struct device *master,
void *data)
{
@@ -333,6 +385,10 @@ static int sun4i_hdmi_bind(struct device *dev, struct device *master,
hdmi->dev = dev;
hdmi->drv = drv;
+ hdmi->variant = of_device_get_match_data(&pdev->dev);
+ if (!hdmi->variant)
+ return -EINVAL;
+
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
hdmi->base = devm_ioremap_resource(dev, res);
if (IS_ERR(hdmi->base)) {
@@ -340,10 +396,25 @@ static int sun4i_hdmi_bind(struct device *dev, struct device *master,
return PTR_ERR(hdmi->base);
}
+ if (hdmi->variant->has_reset_control) {
+ hdmi->reset = devm_reset_control_get(dev, NULL);
+ if (IS_ERR(hdmi->reset)) {
+ dev_err(dev, "Couldn't get the HDMI reset control\n");
+ return PTR_ERR(hdmi->reset);
+ }
+
+ ret = reset_control_deassert(hdmi->reset);
+ if (ret) {
+ dev_err(dev, "Couldn't deassert HDMI reset\n");
+ return ret;
+ }
+ }
+
hdmi->bus_clk = devm_clk_get(dev, "ahb");
if (IS_ERR(hdmi->bus_clk)) {
dev_err(dev, "Couldn't get the HDMI bus clock\n");
- return PTR_ERR(hdmi->bus_clk);
+ ret = PTR_ERR(hdmi->bus_clk);
+ goto err_assert_reset;
}
clk_prepare_enable(hdmi->bus_clk);
@@ -369,18 +440,25 @@ static int sun4i_hdmi_bind(struct device *dev, struct device *master,
goto err_disable_mod_clk;
}
- ret = sun4i_tmds_create(hdmi);
+ ret = hdmi->variant->tmds_create(hdmi);
if (ret) {
dev_err(dev, "Couldn't create the TMDS clock\n");
goto err_disable_mod_clk;
}
+ if (hdmi->variant->has_ddc_parent_clk) {
+ hdmi->ddc_parent_clk = devm_clk_get(dev, "ddc");
+ if (IS_ERR(hdmi->ddc_parent_clk)) {
+ dev_err(dev, "Couldn't get the HDMI DDC clock\n");
+ return PTR_ERR(hdmi->ddc_parent_clk);
+ }
+ } else {
+ hdmi->ddc_parent_clk = hdmi->tmds_clk;
+ }
+
writel(SUN4I_HDMI_CTRL_ENABLE, hdmi->base + SUN4I_HDMI_CTRL_REG);
- writel(SUN4I_HDMI_PAD_CTRL0_TXEN | SUN4I_HDMI_PAD_CTRL0_CKEN |
- SUN4I_HDMI_PAD_CTRL0_PWENG | SUN4I_HDMI_PAD_CTRL0_PWEND |
- SUN4I_HDMI_PAD_CTRL0_PWENC | SUN4I_HDMI_PAD_CTRL0_LDODEN |
- SUN4I_HDMI_PAD_CTRL0_LDOCEN | SUN4I_HDMI_PAD_CTRL0_BIASEN,
+ writel(hdmi->variant->pad_ctrl0_init_val,
hdmi->base + SUN4I_HDMI_PAD_CTRL0_REG);
/*
@@ -390,27 +468,15 @@ static int sun4i_hdmi_bind(struct device *dev, struct device *master,
*/
reg = readl(hdmi->base + SUN4I_HDMI_PAD_CTRL1_REG);
reg &= SUN4I_HDMI_PAD_CTRL1_HALVE_CLK;
- reg |= SUN4I_HDMI_PAD_CTRL1_REG_AMP(6) |
- SUN4I_HDMI_PAD_CTRL1_REG_EMP(2) |
- SUN4I_HDMI_PAD_CTRL1_REG_DENCK |
- SUN4I_HDMI_PAD_CTRL1_REG_DEN |
- SUN4I_HDMI_PAD_CTRL1_EMPCK_OPT |
- SUN4I_HDMI_PAD_CTRL1_EMP_OPT |
- SUN4I_HDMI_PAD_CTRL1_AMPCK_OPT |
- SUN4I_HDMI_PAD_CTRL1_AMP_OPT;
+ reg |= hdmi->variant->pad_ctrl1_init_val;
writel(reg, hdmi->base + SUN4I_HDMI_PAD_CTRL1_REG);
reg = readl(hdmi->base + SUN4I_HDMI_PLL_CTRL_REG);
reg &= SUN4I_HDMI_PLL_CTRL_DIV_MASK;
- reg |= SUN4I_HDMI_PLL_CTRL_VCO_S(8) | SUN4I_HDMI_PLL_CTRL_CS(7) |
- SUN4I_HDMI_PLL_CTRL_CP_S(15) | SUN4I_HDMI_PLL_CTRL_S(7) |
- SUN4I_HDMI_PLL_CTRL_VCO_GAIN(4) | SUN4I_HDMI_PLL_CTRL_SDIV2 |
- SUN4I_HDMI_PLL_CTRL_LDO2_EN | SUN4I_HDMI_PLL_CTRL_LDO1_EN |
- SUN4I_HDMI_PLL_CTRL_HV_IS_33 | SUN4I_HDMI_PLL_CTRL_BWS |
- SUN4I_HDMI_PLL_CTRL_PLL_EN;
+ reg |= hdmi->variant->pll_ctrl_init_val;
writel(reg, hdmi->base + SUN4I_HDMI_PLL_CTRL_REG);
- ret = sun4i_ddc_create(hdmi, hdmi->tmds_clk);
+ ret = hdmi->variant->ddc_create(hdmi, hdmi->ddc_parent_clk);
if (ret) {
dev_err(dev, "Couldn't create the DDC clock\n");
goto err_disable_mod_clk;
@@ -434,7 +500,7 @@ static int sun4i_hdmi_bind(struct device *dev, struct device *master,
goto err_disable_mod_clk;
drm_connector_helper_add(&hdmi->connector,
- &sun4i_hdmi_connector_helper_funcs);
+ hdmi->variant->connector_helpers);
ret = drm_connector_init(drm, &hdmi->connector,
&sun4i_hdmi_connector_funcs,
DRM_MODE_CONNECTOR_HDMIA);
@@ -458,6 +524,8 @@ static int sun4i_hdmi_bind(struct device *dev, struct device *master,
clk_disable_unprepare(hdmi->mod_clk);
err_disable_bus_clk:
clk_disable_unprepare(hdmi->bus_clk);
+err_assert_reset:
+ reset_control_assert(hdmi->reset);
return ret;
}
@@ -490,7 +558,7 @@ static int sun4i_hdmi_remove(struct platform_device *pdev)
}
static const struct of_device_id sun4i_hdmi_of_table[] = {
- { .compatible = "allwinner,sun5i-a10s-hdmi" },
+ { .compatible = "allwinner,sun5i-a10s-hdmi", .data = &sun5i_variant, },
{ }
};
MODULE_DEVICE_TABLE(of, sun4i_hdmi_of_table);
--
2.11.0
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