diff options
Diffstat (limited to 'drivers/gpu/drm/pl111/pl111_versatile.c')
| -rw-r--r-- | drivers/gpu/drm/pl111/pl111_versatile.c | 270 |
1 files changed, 270 insertions, 0 deletions
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); |