[PATCH 7/7] drm/pl111: Add handling of Versatile platforms
Linus Walleij
linus.walleij at linaro.org
Wed Aug 30 18:07:11 UTC 2017
The ARM reference designs in the Versatile family: Integrator,
Versatile and RealView can make use of the new DRM driver as well.
We just need to create a bit of platform-specific code for them
that we isolate to its own file.
Signed-off-by: Linus Walleij <linus.walleij at linaro.org>
---
drivers/gpu/drm/pl111/Makefile | 1 +
drivers/gpu/drm/pl111/pl111_display.c | 7 -
drivers/gpu/drm/pl111/pl111_drv.c | 5 +
drivers/gpu/drm/pl111/pl111_versatile.c | 270 ++++++++++++++++++++++++++++++++
drivers/gpu/drm/pl111/pl111_versatile.h | 9 ++
5 files changed, 285 insertions(+), 7 deletions(-)
create mode 100644 drivers/gpu/drm/pl111/pl111_versatile.c
create mode 100644 drivers/gpu/drm/pl111/pl111_versatile.h
diff --git a/drivers/gpu/drm/pl111/Makefile b/drivers/gpu/drm/pl111/Makefile
index c5f8f9684848..fce1453a93e1 100644
--- a/drivers/gpu/drm/pl111/Makefile
+++ b/drivers/gpu/drm/pl111/Makefile
@@ -1,4 +1,5 @@
pl111_drm-y += pl111_display.o \
+ pl111_versatile.o \
pl111_drv.o
pl111_drm-$(CONFIG_DEBUG_FS) += pl111_debugfs.o
diff --git a/drivers/gpu/drm/pl111/pl111_display.c b/drivers/gpu/drm/pl111/pl111_display.c
index 37f409867934..f7b043f4fed6 100644
--- a/drivers/gpu/drm/pl111/pl111_display.c
+++ b/drivers/gpu/drm/pl111/pl111_display.c
@@ -454,13 +454,6 @@ int pl111_display_init(struct drm_device *drm)
}
of_node_put(endpoint);
- if (tft_r0b0g0[0] != 0 ||
- tft_r0b0g0[1] != 8 ||
- tft_r0b0g0[2] != 16) {
- dev_err(dev, "arm,pl11x,tft-r0g0b0-pads != [0,8,16] not yet supported\n");
- return -EINVAL;
- }
-
ret = pl111_init_clock_divider(drm);
if (ret)
return ret;
diff --git a/drivers/gpu/drm/pl111/pl111_drv.c b/drivers/gpu/drm/pl111/pl111_drv.c
index f6863c0fb809..b1759004269c 100644
--- a/drivers/gpu/drm/pl111/pl111_drv.c
+++ b/drivers/gpu/drm/pl111/pl111_drv.c
@@ -72,6 +72,7 @@
#include <drm/drm_panel.h>
#include "pl111_drm.h"
+#include "pl111_versatile.h"
#define DRIVER_DESC "DRM module for PL111"
@@ -264,6 +265,10 @@ static int pl111_amba_probe(struct amba_device *amba_dev,
return ret;
}
+ ret = pl111_versatile_init(dev, priv);
+ if (ret)
+ goto dev_unref;
+
ret = pl111_modeset_init(drm);
if (ret != 0)
goto dev_unref;
diff --git a/drivers/gpu/drm/pl111/pl111_versatile.c b/drivers/gpu/drm/pl111/pl111_versatile.c
new file mode 100644
index 000000000000..97d4af6925a3
--- /dev/null
+++ b/drivers/gpu/drm/pl111/pl111_versatile.c
@@ -0,0 +1,270 @@
+#include <linux/device.h>
+#include <linux/of.h>
+#include <linux/regmap.h>
+#include <linux/mfd/syscon.h>
+#include <linux/bitops.h>
+#include <linux/module.h>
+#include <drm/drmP.h>
+#include "pl111_versatile.h"
+#include "pl111_drm.h"
+
+static struct regmap *versatile_syscon_map;
+
+/*
+ * We detect the different syscon types from the compatible strings.
+ */
+enum versatile_clcd {
+ INTEGRATOR_CLCD_CM,
+ VERSATILE_CLCD,
+ REALVIEW_CLCD_EB,
+ REALVIEW_CLCD_PB1176,
+ REALVIEW_CLCD_PB11MP,
+ REALVIEW_CLCD_PBA8,
+ REALVIEW_CLCD_PBX,
+};
+
+static const struct of_device_id versatile_clcd_of_match[] = {
+ {
+ .compatible = "arm,core-module-integrator",
+ .data = (void *)INTEGRATOR_CLCD_CM,
+ },
+ {
+ .compatible = "arm,versatile-sysreg",
+ .data = (void *)VERSATILE_CLCD,
+ },
+ {
+ .compatible = "arm,realview-eb-syscon",
+ .data = (void *)REALVIEW_CLCD_EB,
+ },
+ {
+ .compatible = "arm,realview-pb1176-syscon",
+ .data = (void *)REALVIEW_CLCD_PB1176,
+ },
+ {
+ .compatible = "arm,realview-pb11mp-syscon",
+ .data = (void *)REALVIEW_CLCD_PB11MP,
+ },
+ {
+ .compatible = "arm,realview-pba8-syscon",
+ .data = (void *)REALVIEW_CLCD_PBA8,
+ },
+ {
+ .compatible = "arm,realview-pbx-syscon",
+ .data = (void *)REALVIEW_CLCD_PBX,
+ },
+ {},
+};
+
+/*
+ * Core module CLCD control on the Integrator/CP, bits
+ * 8 thru 19 of the CM_CONTROL register controls a bunch
+ * of CLCD settings.
+ */
+#define INTEGRATOR_HDR_CTRL_OFFSET 0x0C
+#define INTEGRATOR_CLCD_LCDBIASEN BIT(8)
+#define INTEGRATOR_CLCD_LCDBIASUP BIT(9)
+#define INTEGRATOR_CLCD_LCDBIASDN BIT(10)
+/* Bits 11,12,13 controls the LCD type */
+#define INTEGRATOR_CLCD_LCDMUX_MASK (BIT(11)|BIT(12)|BIT(13))
+#define INTEGRATOR_CLCD_LCDMUX_LCD24 BIT(11)
+#define INTEGRATOR_CLCD_LCDMUX_VGA565 BIT(12)
+#define INTEGRATOR_CLCD_LCDMUX_SHARP (BIT(11)|BIT(12))
+#define INTEGRATOR_CLCD_LCDMUX_VGA555 BIT(13)
+#define INTEGRATOR_CLCD_LCDMUX_VGA24 (BIT(11)|BIT(12)|BIT(13))
+#define INTEGRATOR_CLCD_LCD0_EN BIT(14)
+#define INTEGRATOR_CLCD_LCD1_EN BIT(15)
+/* R/L flip on Sharp */
+#define INTEGRATOR_CLCD_LCD_STATIC1 BIT(16)
+/* U/D flip on Sharp */
+#define INTEGRATOR_CLCD_LCD_STATIC2 BIT(17)
+/* No connection on Sharp */
+#define INTEGRATOR_CLCD_LCD_STATIC BIT(18)
+/* 0 = 24bit VGA, 1 = 18bit VGA */
+#define INTEGRATOR_CLCD_LCD_N24BITEN BIT(19)
+
+#define INTEGRATOR_CLCD_MASK (INTEGRATOR_CLCD_LCDBIASEN | \
+ INTEGRATOR_CLCD_LCDBIASUP | \
+ INTEGRATOR_CLCD_LCDBIASDN | \
+ INTEGRATOR_CLCD_LCDMUX_MASK | \
+ INTEGRATOR_CLCD_LCD0_EN | \
+ INTEGRATOR_CLCD_LCD1_EN | \
+ INTEGRATOR_CLCD_LCD_STATIC1 | \
+ INTEGRATOR_CLCD_LCD_STATIC2 | \
+ INTEGRATOR_CLCD_LCD_STATIC | \
+ INTEGRATOR_CLCD_LCD_N24BITEN)
+
+static void pl111_integrator_enable(struct drm_device *drm, u32 format)
+{
+ u32 val;
+
+ dev_info(drm->dev, "enable Integrator CLCD connectors\n");
+
+ /* FIXME: really needed? */
+ val = INTEGRATOR_CLCD_LCD_STATIC1 | INTEGRATOR_CLCD_LCD_STATIC2 |
+ INTEGRATOR_CLCD_LCD0_EN | INTEGRATOR_CLCD_LCD1_EN;
+
+ switch (format) {
+ case DRM_FORMAT_XBGR8888:
+ case DRM_FORMAT_XRGB8888:
+ break;
+ case DRM_FORMAT_BGR565:
+ case DRM_FORMAT_RGB565:
+ /* truecolor RGB565 */
+ val |= INTEGRATOR_CLCD_LCDMUX_VGA565;
+ break;
+ case DRM_FORMAT_XBGR1555:
+ case DRM_FORMAT_XRGB1555:
+ /* Pseudocolor, RGB555, BGR555 */
+ val |= INTEGRATOR_CLCD_LCDMUX_VGA555;
+ break;
+ default:
+ dev_err(drm->dev, "unhandled format on Integrator 0x%08x\n",
+ format);
+ break;
+ }
+
+ regmap_update_bits(versatile_syscon_map,
+ INTEGRATOR_HDR_CTRL_OFFSET,
+ INTEGRATOR_CLCD_MASK,
+ val);
+}
+
+/*
+ * This configuration register in the Versatile and RealView
+ * family is uniformly present but appears more and more
+ * unutilized starting with the RealView series.
+ */
+#define SYS_CLCD 0x50
+#define SYS_CLCD_MODE_MASK (BIT(0)|BIT(1))
+#define SYS_CLCD_MODE_888 0
+#define SYS_CLCD_MODE_5551 BIT(0)
+#define SYS_CLCD_MODE_565_R_LSB BIT(1)
+#define SYS_CLCD_MODE_565_B_LSB (BIT(0)|BIT(1))
+#define SYS_CLCD_CONNECTOR_MASK (BIT(2)|BIT(3)|BIT(4)|BIT(5))
+#define SYS_CLCD_NLCDIOON BIT(2)
+#define SYS_CLCD_VDDPOSSWITCH BIT(3)
+#define SYS_CLCD_PWR3V5SWITCH BIT(4)
+#define SYS_CLCD_VDDNEGSWITCH BIT(5)
+
+static void pl111_versatile_disable(struct drm_device *drm)
+{
+ dev_info(drm->dev, "disable Versatile CLCD connectors\n");
+ regmap_update_bits(versatile_syscon_map,
+ SYS_CLCD,
+ SYS_CLCD_CONNECTOR_MASK,
+ 0);
+}
+
+static void pl111_versatile_enable(struct drm_device *drm, u32 format)
+{
+ u32 val = 0;
+
+ dev_info(drm->dev, "enable Versatile CLCD connectors\n");
+
+ switch (format) {
+ case DRM_FORMAT_ABGR8888:
+ case DRM_FORMAT_XBGR8888:
+ case DRM_FORMAT_ARGB8888:
+ case DRM_FORMAT_XRGB8888:
+ val |= SYS_CLCD_MODE_888;
+ break;
+ case DRM_FORMAT_BGR565:
+ val |= SYS_CLCD_MODE_565_R_LSB;
+ break;
+ case DRM_FORMAT_RGB565:
+ val |= SYS_CLCD_MODE_565_B_LSB;
+ break;
+ case DRM_FORMAT_ABGR1555:
+ case DRM_FORMAT_XBGR1555:
+ case DRM_FORMAT_ARGB1555:
+ case DRM_FORMAT_XRGB1555:
+ val |= SYS_CLCD_MODE_5551;
+ break;
+ default:
+ dev_err(drm->dev, "unhandled format on Versatile 0x%08x\n",
+ format);
+ break;
+ }
+
+ /* Set up the MUX */
+ regmap_update_bits(versatile_syscon_map,
+ SYS_CLCD,
+ SYS_CLCD_MODE_MASK,
+ val);
+
+ /* Then enable the display */
+ regmap_update_bits(versatile_syscon_map,
+ SYS_CLCD,
+ SYS_CLCD_CONNECTOR_MASK,
+ SYS_CLCD_NLCDIOON | SYS_CLCD_PWR3V5SWITCH);
+}
+
+static void pl111_realview_clcd_disable(struct drm_device *drm)
+{
+ dev_info(drm->dev, "disable RealView CLCD connectors\n");
+ regmap_update_bits(versatile_syscon_map,
+ SYS_CLCD,
+ SYS_CLCD_CONNECTOR_MASK,
+ 0);
+}
+
+static void pl111_realview_clcd_enable(struct drm_device *drm, u32 format)
+{
+ dev_info(drm->dev, "enable RealView CLCD connectors\n");
+ regmap_update_bits(versatile_syscon_map,
+ SYS_CLCD,
+ SYS_CLCD_CONNECTOR_MASK,
+ SYS_CLCD_NLCDIOON | SYS_CLCD_PWR3V5SWITCH);
+}
+
+int pl111_versatile_init(struct device *dev, struct pl111_drm_dev_private *priv)
+{
+ const struct of_device_id *clcd_id;
+ enum versatile_clcd versatile_clcd_type;
+ struct device_node *np;
+ struct regmap *map;
+
+ np = of_find_matching_node_and_match(NULL, versatile_clcd_of_match,
+ &clcd_id);
+ if (!np) {
+ /* Non-ARM reference designs, just bail out */
+ return 0;
+ }
+ versatile_clcd_type = (enum versatile_clcd)clcd_id->data;
+
+ map = syscon_node_to_regmap(np);
+ if (IS_ERR(map)) {
+ dev_err(dev, "no Versatile syscon regmap\n");
+ return PTR_ERR(map);
+ }
+
+ switch (versatile_clcd_type) {
+ case INTEGRATOR_CLCD_CM:
+ versatile_syscon_map = map;
+ priv->variant_display_enable = pl111_integrator_enable;
+ dev_info(dev, "set up callbacks for Integrator PL110\n");
+ break;
+ case VERSATILE_CLCD:
+ versatile_syscon_map = map;
+ priv->variant_display_enable = pl111_versatile_enable;
+ priv->variant_display_disable = pl111_versatile_disable;
+ dev_info(dev, "set up callbacks for Versatile PL110+\n");
+ break;
+ case REALVIEW_CLCD_EB:
+ case REALVIEW_CLCD_PB1176:
+ case REALVIEW_CLCD_PB11MP:
+ case REALVIEW_CLCD_PBA8:
+ case REALVIEW_CLCD_PBX:
+ versatile_syscon_map = map;
+ priv->variant_display_enable = pl111_realview_clcd_enable;
+ priv->variant_display_disable = pl111_realview_clcd_disable;
+ dev_info(dev, "set up callbacks for RealView PL111\n");
+ break;
+ default:
+ dev_info(dev, "unknown Versatile system controller\n");
+ break;
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(pl111_versatile_init);
diff --git a/drivers/gpu/drm/pl111/pl111_versatile.h b/drivers/gpu/drm/pl111/pl111_versatile.h
new file mode 100644
index 000000000000..41aa6d969dc6
--- /dev/null
+++ b/drivers/gpu/drm/pl111/pl111_versatile.h
@@ -0,0 +1,9 @@
+#include <linux/device.h>
+#include "pl111_drm.h"
+
+#ifndef PL111_VERSATILE_H
+#define PL111_VERSATILE_H
+
+int pl111_versatile_init(struct device *dev, struct pl111_drm_dev_private *priv);
+
+#endif
--
2.13.5
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