From: Sean Paul <seanpaul@xxxxxxxxxxxx>
Include the clock lanes when calibrating the MIPI PHY on Tegra124
compatible devices.
Signed-off-by: Sean Paul <seanpaul@xxxxxxxxxxxx>
[treding@xxxxxxxxxx: bikeshedding]
Signed-off-by: Thierry Reding <treding@xxxxxxxxxx>
---
drivers/gpu/host1x/mipi.c | 124 ++++++++++++++++++++++++++++++++++------------
1 file changed, 92 insertions(+), 32 deletions(-)
diff --git a/drivers/gpu/host1x/mipi.c b/drivers/gpu/host1x/mipi.c
index 0d8c3ae8db6a..22e20c2399c5 100644
--- a/drivers/gpu/host1x/mipi.c
+++ b/drivers/gpu/host1x/mipi.c
@@ -49,11 +49,24 @@
#define MIPI_CAL_CONFIG_DSIC 0x10
#define MIPI_CAL_CONFIG_DSID 0x11
+#define MIPI_CAL_CONFIG_DSIAB_CLK 0x19
+#define MIPI_CAL_CONFIG_DSICD_CLK 0x1a
+#define MIPI_CAL_CONFIG_CSIAB_CLK 0x1b
+#define MIPI_CAL_CONFIG_CSICD_CLK 0x1c
+#define MIPI_CAL_CONFIG_CSIE_CLK 0x1d
+
+/* for data and clock lanes */
#define MIPI_CAL_CONFIG_SELECT (1 << 21)
+
+/* for data lanes */
#define MIPI_CAL_CONFIG_HSPDOS(x) (((x) & 0x1f) << 16)
#define MIPI_CAL_CONFIG_HSPUOS(x) (((x) & 0x1f) << 8)
#define MIPI_CAL_CONFIG_TERMOS(x) (((x) & 0x1f) << 0)
+/* for clock lanes */
+#define MIPI_CAL_CONFIG_HSCLKPDOSD(x) (((x) & 0x1f) << 8)
+#define MIPI_CAL_CONFIG_HSCLKPUOSD(x) (((x) & 0x1f) << 0)
+
#define MIPI_CAL_BIAS_PAD_CFG0 0x16
#define MIPI_CAL_BIAS_PAD_PDVCLAMP (1 << 1)
#define MIPI_CAL_BIAS_PAD_E_VCLAMP_REF (1 << 0)
@@ -63,21 +76,19 @@
#define MIPI_CAL_BIAS_PAD_CFG2 0x18
#define MIPI_CAL_BIAS_PAD_PDVREG (1 << 1)
-static const struct module {
- unsigned long reg;
-} modules[] = {
- { .reg = MIPI_CAL_CONFIG_CSIA },
- { .reg = MIPI_CAL_CONFIG_CSIB },
- { .reg = MIPI_CAL_CONFIG_CSIC },
- { .reg = MIPI_CAL_CONFIG_CSID },
- { .reg = MIPI_CAL_CONFIG_CSIE },
- { .reg = MIPI_CAL_CONFIG_DSIA },
- { .reg = MIPI_CAL_CONFIG_DSIB },
- { .reg = MIPI_CAL_CONFIG_DSIC },
- { .reg = MIPI_CAL_CONFIG_DSID },
+struct tegra_mipi_pad {
+ unsigned long data;
+ unsigned long clk;
+};
+
+struct tegra_mipi_soc {
+ bool has_clk_lane;
+ const struct tegra_mipi_pad *pads;
+ unsigned int num_pads;
};
struct tegra_mipi {
+ const struct tegra_mipi_soc *soc;
void __iomem *regs;
struct mutex lock;
struct clk *clk;
@@ -117,36 +128,35 @@ struct tegra_mipi_device *tegra_mipi_request(struct device *device)
dev = kzalloc(sizeof(*dev), GFP_KERNEL);
if (!dev) {
- of_node_put(args.np);
err = -ENOMEM;
goto out;
}
dev->pdev = of_find_device_by_node(args.np);
if (!dev->pdev) {
- of_node_put(args.np);
err = -ENODEV;
goto free;
}
- of_node_put(args.np);
-
dev->mipi = platform_get_drvdata(dev->pdev);
if (!dev->mipi) {
err = -EPROBE_DEFER;
- goto pdev_put;
+ goto put;
}
+ of_node_put(args.np);
+
dev->pads = args.args[0];
dev->device = device;
return dev;
-pdev_put:
+put:
platform_device_put(dev->pdev);
free:
kfree(dev);
out:
+ of_node_put(args.np);
return ERR_PTR(err);
}
EXPORT_SYMBOL(tegra_mipi_request);
@@ -177,6 +187,7 @@ static int tegra_mipi_wait(struct tegra_mipi *mipi)
int tegra_mipi_calibrate(struct tegra_mipi_device *device)
{
+ const struct tegra_mipi_soc *soc = device->mipi->soc;
unsigned int i;
u32 value;
int err;
@@ -196,16 +207,23 @@ int tegra_mipi_calibrate(struct tegra_mipi_device *device)
value &= ~MIPI_CAL_BIAS_PAD_PDVREG;
tegra_mipi_writel(device->mipi, value, MIPI_CAL_BIAS_PAD_CFG2);
- for (i = 0; i < ARRAY_SIZE(modules); i++) {
- if (device->pads & BIT(i))
- value = MIPI_CAL_CONFIG_SELECT |
- MIPI_CAL_CONFIG_HSPDOS(0) |
- MIPI_CAL_CONFIG_HSPUOS(4) |
- MIPI_CAL_CONFIG_TERMOS(5);
- else
- value = 0;
+ for (i = 0; i < soc->num_pads; i++) {
+ u32 clk = 0, data = 0;
+
+ if (device->pads & BIT(i)) {
+ data = MIPI_CAL_CONFIG_SELECT |
+ MIPI_CAL_CONFIG_HSPDOS(0) |
+ MIPI_CAL_CONFIG_HSPUOS(4) |
+ MIPI_CAL_CONFIG_TERMOS(5);
+ clk = MIPI_CAL_CONFIG_SELECT |
+ MIPI_CAL_CONFIG_HSCLKPDOSD(0) |
+ MIPI_CAL_CONFIG_HSCLKPUOSD(4);
+ }
+
+ tegra_mipi_writel(device->mipi, data, soc->pads[i].data);
- tegra_mipi_writel(device->mipi, value, modules[i].reg);
+ if (soc->has_clk_lane)
+ tegra_mipi_writel(device->mipi, clk, soc->pads[i].clk);
}
value = tegra_mipi_readl(device->mipi, MIPI_CAL_CTRL);
@@ -221,16 +239,63 @@ int tegra_mipi_calibrate(struct tegra_mipi_device *device)
}
EXPORT_SYMBOL(tegra_mipi_calibrate);
+static const struct tegra_mipi_pad tegra114_mipi_pads[] = {
+ { .data = MIPI_CAL_CONFIG_CSIA },
+ { .data = MIPI_CAL_CONFIG_CSIB },
+ { .data = MIPI_CAL_CONFIG_CSIC },
+ { .data = MIPI_CAL_CONFIG_CSID },
+ { .data = MIPI_CAL_CONFIG_CSIE },
+ { .data = MIPI_CAL_CONFIG_DSIA },
+ { .data = MIPI_CAL_CONFIG_DSIB },
+ { .data = MIPI_CAL_CONFIG_DSIC },
+ { .data = MIPI_CAL_CONFIG_DSID },
+};
+
+static const struct tegra_mipi_soc tegra114_mipi_soc = {
+ .has_clk_lane = false,
+ .pads = tegra114_mipi_pads,
+ .num_pads = ARRAY_SIZE(tegra114_mipi_pads),
+};
+
+static const struct tegra_mipi_pad tegra124_mipi_pads[] = {
+ { .data = MIPI_CAL_CONFIG_CSIA, .clk = MIPI_CAL_CONFIG_CSIAB_CLK },
+ { .data = MIPI_CAL_CONFIG_CSIB, .clk = MIPI_CAL_CONFIG_CSIAB_CLK },
+ { .data = MIPI_CAL_CONFIG_CSIC, .clk = MIPI_CAL_CONFIG_CSICD_CLK },
+ { .data = MIPI_CAL_CONFIG_CSID, .clk = MIPI_CAL_CONFIG_CSICD_CLK },
+ { .data = MIPI_CAL_CONFIG_CSIE, .clk = MIPI_CAL_CONFIG_CSIE_CLK },
+ { .data = MIPI_CAL_CONFIG_DSIA, .clk = MIPI_CAL_CONFIG_DSIAB_CLK },
+ { .data = MIPI_CAL_CONFIG_DSIB, .clk = MIPI_CAL_CONFIG_DSIAB_CLK },
+};
+
+static const struct tegra_mipi_soc tegra124_mipi_soc = {
+ .has_clk_lane = true,
+ .pads = tegra124_mipi_pads,
+ .num_pads = ARRAY_SIZE(tegra124_mipi_pads),
+};
+
+static struct of_device_id tegra_mipi_of_match[] = {
+ { .compatible = "nvidia,tegra114-mipi", .data = &tegra114_mipi_soc },
+ { .compatible = "nvidia,tegra124-mipi", .data = &tegra124_mipi_soc },
+ { },
+};
+
static int tegra_mipi_probe(struct platform_device *pdev)
{
+ const struct of_device_id *match;
struct tegra_mipi *mipi;
struct resource *res;
int err;
+ match = of_match_node(tegra_mipi_of_match, pdev->dev.of_node);
+ if (!match)
+ return -ENODEV;
+
mipi = devm_kzalloc(&pdev->dev, sizeof(*mipi), GFP_KERNEL);
if (!mipi)
return -ENOMEM;
+ mipi->soc = match->data;
+
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
mipi->regs = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(mipi->regs))
@@ -262,11 +327,6 @@ static int tegra_mipi_remove(struct platform_device *pdev)
return 0;
}
-static struct of_device_id tegra_mipi_of_match[] = {
- { .compatible = "nvidia,tegra114-mipi", },
- { },
-};
-
struct platform_driver tegra_mipi_driver = {
.driver = {
.name = "tegra-mipi",
--
2.1.2
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