forked from Minki/linux
72fe915ac5
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. Reviewed-by: Eric Anholt <eric@anholt.net> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Link: https://patchwork.freedesktop.org/patch/msgid/20170908124709.4758-7-linus.walleij@linaro.org
271 lines
7.1 KiB
C
271 lines
7.1 KiB
C
#include <linux/device.h>
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#include <linux/of.h>
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#include <linux/regmap.h>
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#include <linux/mfd/syscon.h>
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#include <linux/bitops.h>
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#include <linux/module.h>
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#include <drm/drmP.h>
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#include "pl111_versatile.h"
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#include "pl111_drm.h"
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static struct regmap *versatile_syscon_map;
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/*
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* We detect the different syscon types from the compatible strings.
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*/
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enum versatile_clcd {
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INTEGRATOR_CLCD_CM,
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VERSATILE_CLCD,
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REALVIEW_CLCD_EB,
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REALVIEW_CLCD_PB1176,
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REALVIEW_CLCD_PB11MP,
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REALVIEW_CLCD_PBA8,
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REALVIEW_CLCD_PBX,
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};
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static const struct of_device_id versatile_clcd_of_match[] = {
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{
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.compatible = "arm,core-module-integrator",
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.data = (void *)INTEGRATOR_CLCD_CM,
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},
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{
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.compatible = "arm,versatile-sysreg",
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.data = (void *)VERSATILE_CLCD,
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},
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{
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.compatible = "arm,realview-eb-syscon",
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.data = (void *)REALVIEW_CLCD_EB,
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},
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{
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.compatible = "arm,realview-pb1176-syscon",
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.data = (void *)REALVIEW_CLCD_PB1176,
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},
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{
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.compatible = "arm,realview-pb11mp-syscon",
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.data = (void *)REALVIEW_CLCD_PB11MP,
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},
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{
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.compatible = "arm,realview-pba8-syscon",
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.data = (void *)REALVIEW_CLCD_PBA8,
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},
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{
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.compatible = "arm,realview-pbx-syscon",
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.data = (void *)REALVIEW_CLCD_PBX,
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},
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{},
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};
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/*
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* Core module CLCD control on the Integrator/CP, bits
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* 8 thru 19 of the CM_CONTROL register controls a bunch
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* of CLCD settings.
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*/
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#define INTEGRATOR_HDR_CTRL_OFFSET 0x0C
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#define INTEGRATOR_CLCD_LCDBIASEN BIT(8)
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#define INTEGRATOR_CLCD_LCDBIASUP BIT(9)
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#define INTEGRATOR_CLCD_LCDBIASDN BIT(10)
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/* Bits 11,12,13 controls the LCD type */
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#define INTEGRATOR_CLCD_LCDMUX_MASK (BIT(11)|BIT(12)|BIT(13))
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#define INTEGRATOR_CLCD_LCDMUX_LCD24 BIT(11)
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#define INTEGRATOR_CLCD_LCDMUX_VGA565 BIT(12)
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#define INTEGRATOR_CLCD_LCDMUX_SHARP (BIT(11)|BIT(12))
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#define INTEGRATOR_CLCD_LCDMUX_VGA555 BIT(13)
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#define INTEGRATOR_CLCD_LCDMUX_VGA24 (BIT(11)|BIT(12)|BIT(13))
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#define INTEGRATOR_CLCD_LCD0_EN BIT(14)
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#define INTEGRATOR_CLCD_LCD1_EN BIT(15)
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/* R/L flip on Sharp */
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#define INTEGRATOR_CLCD_LCD_STATIC1 BIT(16)
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/* U/D flip on Sharp */
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#define INTEGRATOR_CLCD_LCD_STATIC2 BIT(17)
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/* No connection on Sharp */
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#define INTEGRATOR_CLCD_LCD_STATIC BIT(18)
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/* 0 = 24bit VGA, 1 = 18bit VGA */
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#define INTEGRATOR_CLCD_LCD_N24BITEN BIT(19)
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#define INTEGRATOR_CLCD_MASK (INTEGRATOR_CLCD_LCDBIASEN | \
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INTEGRATOR_CLCD_LCDBIASUP | \
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INTEGRATOR_CLCD_LCDBIASDN | \
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INTEGRATOR_CLCD_LCDMUX_MASK | \
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INTEGRATOR_CLCD_LCD0_EN | \
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INTEGRATOR_CLCD_LCD1_EN | \
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INTEGRATOR_CLCD_LCD_STATIC1 | \
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INTEGRATOR_CLCD_LCD_STATIC2 | \
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INTEGRATOR_CLCD_LCD_STATIC | \
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INTEGRATOR_CLCD_LCD_N24BITEN)
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static void pl111_integrator_enable(struct drm_device *drm, u32 format)
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{
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u32 val;
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dev_info(drm->dev, "enable Integrator CLCD connectors\n");
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/* FIXME: really needed? */
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val = INTEGRATOR_CLCD_LCD_STATIC1 | INTEGRATOR_CLCD_LCD_STATIC2 |
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INTEGRATOR_CLCD_LCD0_EN | INTEGRATOR_CLCD_LCD1_EN;
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switch (format) {
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case DRM_FORMAT_XBGR8888:
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case DRM_FORMAT_XRGB8888:
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break;
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case DRM_FORMAT_BGR565:
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case DRM_FORMAT_RGB565:
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/* truecolor RGB565 */
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val |= INTEGRATOR_CLCD_LCDMUX_VGA565;
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break;
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case DRM_FORMAT_XBGR1555:
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case DRM_FORMAT_XRGB1555:
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/* Pseudocolor, RGB555, BGR555 */
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val |= INTEGRATOR_CLCD_LCDMUX_VGA555;
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break;
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default:
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dev_err(drm->dev, "unhandled format on Integrator 0x%08x\n",
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format);
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break;
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}
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regmap_update_bits(versatile_syscon_map,
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INTEGRATOR_HDR_CTRL_OFFSET,
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INTEGRATOR_CLCD_MASK,
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val);
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}
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/*
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* This configuration register in the Versatile and RealView
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* family is uniformly present but appears more and more
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* unutilized starting with the RealView series.
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*/
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#define SYS_CLCD 0x50
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#define SYS_CLCD_MODE_MASK (BIT(0)|BIT(1))
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#define SYS_CLCD_MODE_888 0
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#define SYS_CLCD_MODE_5551 BIT(0)
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#define SYS_CLCD_MODE_565_R_LSB BIT(1)
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#define SYS_CLCD_MODE_565_B_LSB (BIT(0)|BIT(1))
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#define SYS_CLCD_CONNECTOR_MASK (BIT(2)|BIT(3)|BIT(4)|BIT(5))
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#define SYS_CLCD_NLCDIOON BIT(2)
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#define SYS_CLCD_VDDPOSSWITCH BIT(3)
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#define SYS_CLCD_PWR3V5SWITCH BIT(4)
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#define SYS_CLCD_VDDNEGSWITCH BIT(5)
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static void pl111_versatile_disable(struct drm_device *drm)
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{
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dev_info(drm->dev, "disable Versatile CLCD connectors\n");
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regmap_update_bits(versatile_syscon_map,
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SYS_CLCD,
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SYS_CLCD_CONNECTOR_MASK,
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0);
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}
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static void pl111_versatile_enable(struct drm_device *drm, u32 format)
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{
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u32 val = 0;
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dev_info(drm->dev, "enable Versatile CLCD connectors\n");
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switch (format) {
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case DRM_FORMAT_ABGR8888:
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case DRM_FORMAT_XBGR8888:
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case DRM_FORMAT_ARGB8888:
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case DRM_FORMAT_XRGB8888:
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val |= SYS_CLCD_MODE_888;
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break;
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case DRM_FORMAT_BGR565:
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val |= SYS_CLCD_MODE_565_R_LSB;
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break;
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case DRM_FORMAT_RGB565:
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val |= SYS_CLCD_MODE_565_B_LSB;
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break;
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case DRM_FORMAT_ABGR1555:
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case DRM_FORMAT_XBGR1555:
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case DRM_FORMAT_ARGB1555:
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case DRM_FORMAT_XRGB1555:
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val |= SYS_CLCD_MODE_5551;
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break;
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default:
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dev_err(drm->dev, "unhandled format on Versatile 0x%08x\n",
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format);
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break;
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}
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/* Set up the MUX */
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regmap_update_bits(versatile_syscon_map,
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SYS_CLCD,
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SYS_CLCD_MODE_MASK,
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val);
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/* Then enable the display */
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regmap_update_bits(versatile_syscon_map,
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SYS_CLCD,
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SYS_CLCD_CONNECTOR_MASK,
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SYS_CLCD_NLCDIOON | SYS_CLCD_PWR3V5SWITCH);
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}
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static void pl111_realview_clcd_disable(struct drm_device *drm)
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{
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dev_info(drm->dev, "disable RealView CLCD connectors\n");
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regmap_update_bits(versatile_syscon_map,
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SYS_CLCD,
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SYS_CLCD_CONNECTOR_MASK,
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0);
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}
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static void pl111_realview_clcd_enable(struct drm_device *drm, u32 format)
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{
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dev_info(drm->dev, "enable RealView CLCD connectors\n");
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regmap_update_bits(versatile_syscon_map,
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SYS_CLCD,
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SYS_CLCD_CONNECTOR_MASK,
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SYS_CLCD_NLCDIOON | SYS_CLCD_PWR3V5SWITCH);
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}
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int pl111_versatile_init(struct device *dev, struct pl111_drm_dev_private *priv)
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{
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const struct of_device_id *clcd_id;
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enum versatile_clcd versatile_clcd_type;
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struct device_node *np;
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struct regmap *map;
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np = of_find_matching_node_and_match(NULL, versatile_clcd_of_match,
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&clcd_id);
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if (!np) {
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/* Non-ARM reference designs, just bail out */
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return 0;
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}
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versatile_clcd_type = (enum versatile_clcd)clcd_id->data;
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map = syscon_node_to_regmap(np);
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if (IS_ERR(map)) {
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dev_err(dev, "no Versatile syscon regmap\n");
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return PTR_ERR(map);
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}
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switch (versatile_clcd_type) {
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case INTEGRATOR_CLCD_CM:
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versatile_syscon_map = map;
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priv->variant_display_enable = pl111_integrator_enable;
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dev_info(dev, "set up callbacks for Integrator PL110\n");
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break;
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case VERSATILE_CLCD:
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versatile_syscon_map = map;
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priv->variant_display_enable = pl111_versatile_enable;
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priv->variant_display_disable = pl111_versatile_disable;
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dev_info(dev, "set up callbacks for Versatile PL110+\n");
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break;
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case REALVIEW_CLCD_EB:
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case REALVIEW_CLCD_PB1176:
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case REALVIEW_CLCD_PB11MP:
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case REALVIEW_CLCD_PBA8:
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case REALVIEW_CLCD_PBX:
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versatile_syscon_map = map;
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priv->variant_display_enable = pl111_realview_clcd_enable;
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priv->variant_display_disable = pl111_realview_clcd_disable;
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dev_info(dev, "set up callbacks for RealView PL111\n");
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break;
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default:
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dev_info(dev, "unknown Versatile system controller\n");
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break;
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}
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return 0;
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}
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EXPORT_SYMBOL_GPL(pl111_versatile_init);
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