aboutsummaryrefslogtreecommitdiff
path: root/drivers/gpu/host1x
diff options
context:
space:
mode:
authorThierry Reding <treding@nvidia.com>2015-04-08 17:03:49 +0200
committerThierry Reding <treding@nvidia.com>2015-08-13 13:47:15 +0200
commit83a3c223cc5678c5ced554fa2819747fd53437c7 (patch)
tree22dcf22cefe75a63b6a5dc56963651b526175b4b /drivers/gpu/host1x
parentd770e558e21961ad6cfdf0ff7df0eb5d7d4f0754 (diff)
downloadlinux-stericsson-83a3c223cc5678c5ced554fa2819747fd53437c7.tar.gz
gpu: host1x: mipi: Parameterize to support future SoCs
Parameterize more of the register programming to accomodate for changes required by future SoC generations. Signed-off-by: Thierry Reding <treding@nvidia.com>
Diffstat (limited to 'drivers/gpu/host1x')
-rw-r--r--drivers/gpu/host1x/mipi.c87
1 files changed, 79 insertions, 8 deletions
diff --git a/drivers/gpu/host1x/mipi.c b/drivers/gpu/host1x/mipi.c
index fbc6ee6ca337..9db8b8a03575 100644
--- a/drivers/gpu/host1x/mipi.c
+++ b/drivers/gpu/host1x/mipi.c
@@ -31,6 +31,9 @@
#include "dev.h"
#define MIPI_CAL_CTRL 0x00
+#define MIPI_CAL_CTRL_NOISE_FILTER(x) (((x) & 0xf) << 26)
+#define MIPI_CAL_CTRL_PRESCALE(x) (((x) & 0x3) << 24)
+#define MIPI_CAL_CTRL_CLKEN_OVR (1 << 4)
#define MIPI_CAL_CTRL_START (1 << 0)
#define MIPI_CAL_AUTOCAL_CTRL 0x01
@@ -73,8 +76,11 @@
#define MIPI_CAL_BIAS_PAD_CFG1 0x17
#define MIPI_CAL_BIAS_PAD_DRV_DN_REF(x) (((x) & 0x7) << 16)
+#define MIPI_CAL_BIAS_PAD_DRV_UP_REF(x) (((x) & 0x7) << 8)
#define MIPI_CAL_BIAS_PAD_CFG2 0x18
+#define MIPI_CAL_BIAS_PAD_VCLAMP(x) (((x) & 0x7) << 16)
+#define MIPI_CAL_BIAS_PAD_VAUXP(x) (((x) & 0x7) << 4)
#define MIPI_CAL_BIAS_PAD_PDVREG (1 << 1)
struct tegra_mipi_pad {
@@ -86,6 +92,25 @@ struct tegra_mipi_soc {
bool has_clk_lane;
const struct tegra_mipi_pad *pads;
unsigned int num_pads;
+
+ bool clock_enable_override;
+ bool needs_vclamp_ref;
+
+ /* bias pad configuration settings */
+ u8 pad_drive_down_ref;
+ u8 pad_drive_up_ref;
+
+ u8 pad_vclamp_level;
+ u8 pad_vauxp_level;
+
+ /* calibration settings for data lanes */
+ u8 hspdos;
+ u8 hspuos;
+ u8 termos;
+
+ /* calibration settings for clock lanes */
+ u8 hsclkpdos;
+ u8 hsclkpuos;
};
struct tegra_mipi {
@@ -201,27 +226,38 @@ int tegra_mipi_calibrate(struct tegra_mipi_device *device)
value = tegra_mipi_readl(device->mipi, MIPI_CAL_BIAS_PAD_CFG0);
value &= ~MIPI_CAL_BIAS_PAD_PDVCLAMP;
- value |= MIPI_CAL_BIAS_PAD_E_VCLAMP_REF;
+
+ if (soc->needs_vclamp_ref)
+ value |= MIPI_CAL_BIAS_PAD_E_VCLAMP_REF;
+
tegra_mipi_writel(device->mipi, value, MIPI_CAL_BIAS_PAD_CFG0);
- tegra_mipi_writel(device->mipi, MIPI_CAL_BIAS_PAD_DRV_DN_REF(2),
- MIPI_CAL_BIAS_PAD_CFG1);
+ value = MIPI_CAL_BIAS_PAD_DRV_DN_REF(soc->pad_drive_down_ref) |
+ MIPI_CAL_BIAS_PAD_DRV_UP_REF(soc->pad_drive_up_ref);
+ tegra_mipi_writel(device->mipi, value, MIPI_CAL_BIAS_PAD_CFG1);
value = tegra_mipi_readl(device->mipi, MIPI_CAL_BIAS_PAD_CFG2);
value &= ~MIPI_CAL_BIAS_PAD_PDVREG;
tegra_mipi_writel(device->mipi, value, MIPI_CAL_BIAS_PAD_CFG2);
+ value = tegra_mipi_readl(device->mipi, MIPI_CAL_BIAS_PAD_CFG2);
+ value &= ~MIPI_CAL_BIAS_PAD_VCLAMP(0x7);
+ value &= ~MIPI_CAL_BIAS_PAD_VAUXP(0x7);
+ value |= MIPI_CAL_BIAS_PAD_VCLAMP(soc->pad_vclamp_level);
+ value |= MIPI_CAL_BIAS_PAD_VAUXP(soc->pad_vauxp_level);
+ tegra_mipi_writel(device->mipi, value, MIPI_CAL_BIAS_PAD_CFG2);
+
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);
+ MIPI_CAL_CONFIG_HSPDOS(soc->hspdos) |
+ MIPI_CAL_CONFIG_HSPUOS(soc->hspuos) |
+ MIPI_CAL_CONFIG_TERMOS(soc->termos);
clk = MIPI_CAL_CONFIG_SELECT |
- MIPI_CAL_CONFIG_HSCLKPDOSD(0) |
- MIPI_CAL_CONFIG_HSCLKPUOSD(4);
+ MIPI_CAL_CONFIG_HSCLKPDOSD(soc->hsclkpdos) |
+ MIPI_CAL_CONFIG_HSCLKPUOSD(soc->hsclkpuos);
}
tegra_mipi_writel(device->mipi, data, soc->pads[i].data);
@@ -231,6 +267,19 @@ int tegra_mipi_calibrate(struct tegra_mipi_device *device)
}
value = tegra_mipi_readl(device->mipi, MIPI_CAL_CTRL);
+ value &= ~MIPI_CAL_CTRL_NOISE_FILTER(0xf);
+ value &= ~MIPI_CAL_CTRL_PRESCALE(0x3);
+ value |= MIPI_CAL_CTRL_NOISE_FILTER(0xa);
+ value |= MIPI_CAL_CTRL_PRESCALE(0x2);
+
+ if (!soc->clock_enable_override)
+ value &= ~MIPI_CAL_CTRL_CLKEN_OVR;
+ else
+ value |= MIPI_CAL_CTRL_CLKEN_OVR;
+
+ tegra_mipi_writel(device->mipi, value, MIPI_CAL_CTRL);
+
+ value = tegra_mipi_readl(device->mipi, MIPI_CAL_CTRL);
value |= MIPI_CAL_CTRL_START;
tegra_mipi_writel(device->mipi, value, MIPI_CAL_CTRL);
@@ -259,6 +308,17 @@ static const struct tegra_mipi_soc tegra114_mipi_soc = {
.has_clk_lane = false,
.pads = tegra114_mipi_pads,
.num_pads = ARRAY_SIZE(tegra114_mipi_pads),
+ .clock_enable_override = true,
+ .needs_vclamp_ref = true,
+ .pad_drive_down_ref = 0x2,
+ .pad_drive_up_ref = 0x0,
+ .pad_vclamp_level = 0x0,
+ .pad_vauxp_level = 0x0,
+ .hspdos = 0x0,
+ .hspuos = 0x4,
+ .termos = 0x5,
+ .hsclkpdos = 0x0,
+ .hsclkpuos = 0x4,
};
static const struct tegra_mipi_pad tegra124_mipi_pads[] = {
@@ -275,6 +335,17 @@ static const struct tegra_mipi_soc tegra124_mipi_soc = {
.has_clk_lane = true,
.pads = tegra124_mipi_pads,
.num_pads = ARRAY_SIZE(tegra124_mipi_pads),
+ .clock_enable_override = true,
+ .needs_vclamp_ref = true,
+ .pad_drive_down_ref = 0x2,
+ .pad_drive_up_ref = 0x0,
+ .pad_vclamp_level = 0x0,
+ .pad_vauxp_level = 0x0,
+ .hspdos = 0x0,
+ .hspuos = 0x0,
+ .termos = 0x0,
+ .hsclkpdos = 0x1,
+ .hsclkpuos = 0x2,
};
static struct of_device_id tegra_mipi_of_match[] = {