gma500: Add Oaktrail support
Oaktrail (GMA600) is found on some tablet/slate PC type systems. It's a bit
different to the GMA500 but similar enough it makes sense to plug it into
the same driver.
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
diff --git a/drivers/gpu/drm/gma500/oaktrail_device.c b/drivers/gpu/drm/gma500/oaktrail_device.c
new file mode 100644
index 0000000..41c418f
--- /dev/null
+++ b/drivers/gpu/drm/gma500/oaktrail_device.c
@@ -0,0 +1,489 @@
+/**************************************************************************
+ * Copyright (c) 2011, Intel Corporation.
+ * All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ **************************************************************************/
+
+#include <linux/backlight.h>
+#include <linux/module.h>
+#include <linux/dmi.h>
+#include <drm/drmP.h>
+#include <drm/drm.h>
+#include "psb_drm.h"
+#include "psb_drv.h"
+#include "psb_reg.h"
+#include "psb_intel_reg.h"
+#include <asm/mrst.h>
+#include <asm/intel_scu_ipc.h>
+#include "mid_bios.h"
+
+static int oaktrail_output_init(struct drm_device *dev)
+{
+ struct drm_psb_private *dev_priv = dev->dev_private;
+ if (dev_priv->iLVDS_enable)
+ oaktrail_lvds_init(dev, &dev_priv->mode_dev);
+ else
+ dev_err(dev->dev, "DSI is not supported\n");
+ if (dev_priv->hdmi_priv)
+ oaktrail_hdmi_init(dev, &dev_priv->mode_dev);
+ return 0;
+}
+
+/*
+ * Provide the low level interfaces for the Moorestown backlight
+ */
+
+#ifdef CONFIG_BACKLIGHT_CLASS_DEVICE
+
+#define MRST_BLC_MAX_PWM_REG_FREQ 0xFFFF
+#define BLC_PWM_PRECISION_FACTOR 100 /* 10000000 */
+#define BLC_PWM_FREQ_CALC_CONSTANT 32
+#define MHz 1000000
+#define BLC_ADJUSTMENT_MAX 100
+
+static struct backlight_device *oaktrail_backlight_device;
+static int oaktrail_brightness;
+
+static int oaktrail_set_brightness(struct backlight_device *bd)
+{
+ struct drm_device *dev = bl_get_data(oaktrail_backlight_device);
+ struct drm_psb_private *dev_priv = dev->dev_private;
+ int level = bd->props.brightness;
+ u32 blc_pwm_ctl;
+ u32 max_pwm_blc;
+
+ /* Percentage 1-100% being valid */
+ if (level < 1)
+ level = 1;
+
+ if (gma_power_begin(dev, 0)) {
+ /* Calculate and set the brightness value */
+ max_pwm_blc = REG_READ(BLC_PWM_CTL) >> 16;
+ blc_pwm_ctl = level * max_pwm_blc / 100;
+
+ /* Adjust the backlight level with the percent in
+ * dev_priv->blc_adj1;
+ */
+ blc_pwm_ctl = blc_pwm_ctl * dev_priv->blc_adj1;
+ blc_pwm_ctl = blc_pwm_ctl / 100;
+
+ /* Adjust the backlight level with the percent in
+ * dev_priv->blc_adj2;
+ */
+ blc_pwm_ctl = blc_pwm_ctl * dev_priv->blc_adj2;
+ blc_pwm_ctl = blc_pwm_ctl / 100;
+
+ /* force PWM bit on */
+ REG_WRITE(BLC_PWM_CTL2, (0x80000000 | REG_READ(BLC_PWM_CTL2)));
+ REG_WRITE(BLC_PWM_CTL, (max_pwm_blc << 16) | blc_pwm_ctl);
+ gma_power_end(dev);
+ }
+ oaktrail_brightness = level;
+ return 0;
+}
+
+static int oaktrail_get_brightness(struct backlight_device *bd)
+{
+ /* return locally cached var instead of HW read (due to DPST etc.) */
+ /* FIXME: ideally return actual value in case firmware fiddled with
+ it */
+ return oaktrail_brightness;
+}
+
+static int device_backlight_init(struct drm_device *dev)
+{
+ struct drm_psb_private *dev_priv = dev->dev_private;
+ unsigned long core_clock;
+ u16 bl_max_freq;
+ uint32_t value;
+ uint32_t blc_pwm_precision_factor;
+
+ dev_priv->blc_adj1 = BLC_ADJUSTMENT_MAX;
+ dev_priv->blc_adj2 = BLC_ADJUSTMENT_MAX;
+ bl_max_freq = 256;
+ /* this needs to be set elsewhere */
+ blc_pwm_precision_factor = BLC_PWM_PRECISION_FACTOR;
+
+ core_clock = dev_priv->core_freq;
+
+ value = (core_clock * MHz) / BLC_PWM_FREQ_CALC_CONSTANT;
+ value *= blc_pwm_precision_factor;
+ value /= bl_max_freq;
+ value /= blc_pwm_precision_factor;
+
+ if (value > (unsigned long long)MRST_BLC_MAX_PWM_REG_FREQ)
+ return -ERANGE;
+
+ if (gma_power_begin(dev, false)) {
+ REG_WRITE(BLC_PWM_CTL2, (0x80000000 | REG_READ(BLC_PWM_CTL2)));
+ REG_WRITE(BLC_PWM_CTL, value | (value << 16));
+ gma_power_end(dev);
+ }
+ return 0;
+}
+
+static const struct backlight_ops oaktrail_ops = {
+ .get_brightness = oaktrail_get_brightness,
+ .update_status = oaktrail_set_brightness,
+};
+
+int oaktrail_backlight_init(struct drm_device *dev)
+{
+ struct drm_psb_private *dev_priv = dev->dev_private;
+ int ret;
+ struct backlight_properties props;
+
+ memset(&props, 0, sizeof(struct backlight_properties));
+ props.max_brightness = 100;
+ props.type = BACKLIGHT_PLATFORM;
+
+ oaktrail_backlight_device = backlight_device_register("oaktrail-bl",
+ NULL, (void *)dev, &oaktrail_ops, &props);
+
+ if (IS_ERR(oaktrail_backlight_device))
+ return PTR_ERR(oaktrail_backlight_device);
+
+ ret = device_backlight_init(dev);
+ if (ret < 0) {
+ backlight_device_unregister(oaktrail_backlight_device);
+ return ret;
+ }
+ oaktrail_backlight_device->props.brightness = 100;
+ oaktrail_backlight_device->props.max_brightness = 100;
+ backlight_update_status(oaktrail_backlight_device);
+ dev_priv->backlight_device = oaktrail_backlight_device;
+ return 0;
+}
+
+#endif
+
+/*
+ * Provide the Moorestown specific chip logic and low level methods
+ * for power management
+ */
+
+static void oaktrail_init_pm(struct drm_device *dev)
+{
+}
+
+/**
+ * oaktrail_save_display_registers - save registers lost on suspend
+ * @dev: our DRM device
+ *
+ * Save the state we need in order to be able to restore the interface
+ * upon resume from suspend
+ */
+static int oaktrail_save_display_registers(struct drm_device *dev)
+{
+ struct drm_psb_private *dev_priv = dev->dev_private;
+ int i;
+ u32 pp_stat;
+
+ /* Display arbitration control + watermarks */
+ dev_priv->saveDSPARB = PSB_RVDC32(DSPARB);
+ dev_priv->saveDSPFW1 = PSB_RVDC32(DSPFW1);
+ dev_priv->saveDSPFW2 = PSB_RVDC32(DSPFW2);
+ dev_priv->saveDSPFW3 = PSB_RVDC32(DSPFW3);
+ dev_priv->saveDSPFW4 = PSB_RVDC32(DSPFW4);
+ dev_priv->saveDSPFW5 = PSB_RVDC32(DSPFW5);
+ dev_priv->saveDSPFW6 = PSB_RVDC32(DSPFW6);
+ dev_priv->saveCHICKENBIT = PSB_RVDC32(DSPCHICKENBIT);
+
+ /* Pipe & plane A info */
+ dev_priv->savePIPEACONF = PSB_RVDC32(PIPEACONF);
+ dev_priv->savePIPEASRC = PSB_RVDC32(PIPEASRC);
+ dev_priv->saveFPA0 = PSB_RVDC32(MRST_FPA0);
+ dev_priv->saveFPA1 = PSB_RVDC32(MRST_FPA1);
+ dev_priv->saveDPLL_A = PSB_RVDC32(MRST_DPLL_A);
+ dev_priv->saveHTOTAL_A = PSB_RVDC32(HTOTAL_A);
+ dev_priv->saveHBLANK_A = PSB_RVDC32(HBLANK_A);
+ dev_priv->saveHSYNC_A = PSB_RVDC32(HSYNC_A);
+ dev_priv->saveVTOTAL_A = PSB_RVDC32(VTOTAL_A);
+ dev_priv->saveVBLANK_A = PSB_RVDC32(VBLANK_A);
+ dev_priv->saveVSYNC_A = PSB_RVDC32(VSYNC_A);
+ dev_priv->saveBCLRPAT_A = PSB_RVDC32(BCLRPAT_A);
+ dev_priv->saveDSPACNTR = PSB_RVDC32(DSPACNTR);
+ dev_priv->saveDSPASTRIDE = PSB_RVDC32(DSPASTRIDE);
+ dev_priv->saveDSPAADDR = PSB_RVDC32(DSPABASE);
+ dev_priv->saveDSPASURF = PSB_RVDC32(DSPASURF);
+ dev_priv->saveDSPALINOFF = PSB_RVDC32(DSPALINOFF);
+ dev_priv->saveDSPATILEOFF = PSB_RVDC32(DSPATILEOFF);
+
+ /* Save cursor regs */
+ dev_priv->saveDSPACURSOR_CTRL = PSB_RVDC32(CURACNTR);
+ dev_priv->saveDSPACURSOR_BASE = PSB_RVDC32(CURABASE);
+ dev_priv->saveDSPACURSOR_POS = PSB_RVDC32(CURAPOS);
+
+ /* Save palette (gamma) */
+ for (i = 0; i < 256; i++)
+ dev_priv->save_palette_a[i] = PSB_RVDC32(PALETTE_A + (i << 2));
+
+ if (dev_priv->hdmi_priv)
+ oaktrail_hdmi_save(dev);
+
+ /* Save performance state */
+ dev_priv->savePERF_MODE = PSB_RVDC32(MRST_PERF_MODE);
+
+ /* LVDS state */
+ dev_priv->savePP_CONTROL = PSB_RVDC32(PP_CONTROL);
+ dev_priv->savePFIT_PGM_RATIOS = PSB_RVDC32(PFIT_PGM_RATIOS);
+ dev_priv->savePFIT_AUTO_RATIOS = PSB_RVDC32(PFIT_AUTO_RATIOS);
+ dev_priv->saveBLC_PWM_CTL = PSB_RVDC32(BLC_PWM_CTL);
+ dev_priv->saveBLC_PWM_CTL2 = PSB_RVDC32(BLC_PWM_CTL2);
+ dev_priv->saveLVDS = PSB_RVDC32(LVDS);
+ dev_priv->savePFIT_CONTROL = PSB_RVDC32(PFIT_CONTROL);
+ dev_priv->savePP_ON_DELAYS = PSB_RVDC32(LVDSPP_ON);
+ dev_priv->savePP_OFF_DELAYS = PSB_RVDC32(LVDSPP_OFF);
+ dev_priv->savePP_DIVISOR = PSB_RVDC32(PP_CYCLE);
+
+ /* HW overlay */
+ dev_priv->saveOV_OVADD = PSB_RVDC32(OV_OVADD);
+ dev_priv->saveOV_OGAMC0 = PSB_RVDC32(OV_OGAMC0);
+ dev_priv->saveOV_OGAMC1 = PSB_RVDC32(OV_OGAMC1);
+ dev_priv->saveOV_OGAMC2 = PSB_RVDC32(OV_OGAMC2);
+ dev_priv->saveOV_OGAMC3 = PSB_RVDC32(OV_OGAMC3);
+ dev_priv->saveOV_OGAMC4 = PSB_RVDC32(OV_OGAMC4);
+ dev_priv->saveOV_OGAMC5 = PSB_RVDC32(OV_OGAMC5);
+
+ /* DPST registers */
+ dev_priv->saveHISTOGRAM_INT_CONTROL_REG =
+ PSB_RVDC32(HISTOGRAM_INT_CONTROL);
+ dev_priv->saveHISTOGRAM_LOGIC_CONTROL_REG =
+ PSB_RVDC32(HISTOGRAM_LOGIC_CONTROL);
+ dev_priv->savePWM_CONTROL_LOGIC = PSB_RVDC32(PWM_CONTROL_LOGIC);
+
+ if (dev_priv->iLVDS_enable) {
+ /* Shut down the panel */
+ PSB_WVDC32(0, PP_CONTROL);
+
+ do {
+ pp_stat = PSB_RVDC32(PP_STATUS);
+ } while (pp_stat & 0x80000000);
+
+ /* Turn off the plane */
+ PSB_WVDC32(0x58000000, DSPACNTR);
+ /* Trigger the plane disable */
+ PSB_WVDC32(0, DSPASURF);
+
+ /* Wait ~4 ticks */
+ msleep(4);
+
+ /* Turn off pipe */
+ PSB_WVDC32(0x0, PIPEACONF);
+ /* Wait ~8 ticks */
+ msleep(8);
+
+ /* Turn off PLLs */
+ PSB_WVDC32(0, MRST_DPLL_A);
+ }
+ return 0;
+}
+
+/**
+ * oaktrail_restore_display_registers - restore lost register state
+ * @dev: our DRM device
+ *
+ * Restore register state that was lost during suspend and resume.
+ */
+static int oaktrail_restore_display_registers(struct drm_device *dev)
+{
+ struct drm_psb_private *dev_priv = dev->dev_private;
+ u32 pp_stat;
+ int i;
+
+ /* Display arbitration + watermarks */
+ PSB_WVDC32(dev_priv->saveDSPARB, DSPARB);
+ PSB_WVDC32(dev_priv->saveDSPFW1, DSPFW1);
+ PSB_WVDC32(dev_priv->saveDSPFW2, DSPFW2);
+ PSB_WVDC32(dev_priv->saveDSPFW3, DSPFW3);
+ PSB_WVDC32(dev_priv->saveDSPFW4, DSPFW4);
+ PSB_WVDC32(dev_priv->saveDSPFW5, DSPFW5);
+ PSB_WVDC32(dev_priv->saveDSPFW6, DSPFW6);
+ PSB_WVDC32(dev_priv->saveCHICKENBIT, DSPCHICKENBIT);
+
+ /* Make sure VGA plane is off. it initializes to on after reset!*/
+ PSB_WVDC32(0x80000000, VGACNTRL);
+
+ /* set the plls */
+ PSB_WVDC32(dev_priv->saveFPA0, MRST_FPA0);
+ PSB_WVDC32(dev_priv->saveFPA1, MRST_FPA1);
+
+ /* Actually enable it */
+ PSB_WVDC32(dev_priv->saveDPLL_A, MRST_DPLL_A);
+ DRM_UDELAY(150);
+
+ /* Restore mode */
+ PSB_WVDC32(dev_priv->saveHTOTAL_A, HTOTAL_A);
+ PSB_WVDC32(dev_priv->saveHBLANK_A, HBLANK_A);
+ PSB_WVDC32(dev_priv->saveHSYNC_A, HSYNC_A);
+ PSB_WVDC32(dev_priv->saveVTOTAL_A, VTOTAL_A);
+ PSB_WVDC32(dev_priv->saveVBLANK_A, VBLANK_A);
+ PSB_WVDC32(dev_priv->saveVSYNC_A, VSYNC_A);
+ PSB_WVDC32(dev_priv->savePIPEASRC, PIPEASRC);
+ PSB_WVDC32(dev_priv->saveBCLRPAT_A, BCLRPAT_A);
+
+ /* Restore performance mode*/
+ PSB_WVDC32(dev_priv->savePERF_MODE, MRST_PERF_MODE);
+
+ /* Enable the pipe*/
+ if (dev_priv->iLVDS_enable)
+ PSB_WVDC32(dev_priv->savePIPEACONF, PIPEACONF);
+
+ /* Set up the plane*/
+ PSB_WVDC32(dev_priv->saveDSPALINOFF, DSPALINOFF);
+ PSB_WVDC32(dev_priv->saveDSPASTRIDE, DSPASTRIDE);
+ PSB_WVDC32(dev_priv->saveDSPATILEOFF, DSPATILEOFF);
+
+ /* Enable the plane */
+ PSB_WVDC32(dev_priv->saveDSPACNTR, DSPACNTR);
+ PSB_WVDC32(dev_priv->saveDSPASURF, DSPASURF);
+
+ /* Enable Cursor A */
+ PSB_WVDC32(dev_priv->saveDSPACURSOR_CTRL, CURACNTR);
+ PSB_WVDC32(dev_priv->saveDSPACURSOR_POS, CURAPOS);
+ PSB_WVDC32(dev_priv->saveDSPACURSOR_BASE, CURABASE);
+
+ /* Restore palette (gamma) */
+ for (i = 0; i < 256; i++)
+ PSB_WVDC32(dev_priv->save_palette_a[i], PALETTE_A + (i << 2));
+
+ if (dev_priv->hdmi_priv)
+ oaktrail_hdmi_restore(dev);
+
+ if (dev_priv->iLVDS_enable) {
+ PSB_WVDC32(dev_priv->saveBLC_PWM_CTL2, BLC_PWM_CTL2);
+ PSB_WVDC32(dev_priv->saveLVDS, LVDS); /*port 61180h*/
+ PSB_WVDC32(dev_priv->savePFIT_CONTROL, PFIT_CONTROL);
+ PSB_WVDC32(dev_priv->savePFIT_PGM_RATIOS, PFIT_PGM_RATIOS);
+ PSB_WVDC32(dev_priv->savePFIT_AUTO_RATIOS, PFIT_AUTO_RATIOS);
+ PSB_WVDC32(dev_priv->saveBLC_PWM_CTL, BLC_PWM_CTL);
+ PSB_WVDC32(dev_priv->savePP_ON_DELAYS, LVDSPP_ON);
+ PSB_WVDC32(dev_priv->savePP_OFF_DELAYS, LVDSPP_OFF);
+ PSB_WVDC32(dev_priv->savePP_DIVISOR, PP_CYCLE);
+ PSB_WVDC32(dev_priv->savePP_CONTROL, PP_CONTROL);
+ }
+
+ /* Wait for cycle delay */
+ do {
+ pp_stat = PSB_RVDC32(PP_STATUS);
+ } while (pp_stat & 0x08000000);
+
+ /* Wait for panel power up */
+ do {
+ pp_stat = PSB_RVDC32(PP_STATUS);
+ } while (pp_stat & 0x10000000);
+
+ /* Restore HW overlay */
+ PSB_WVDC32(dev_priv->saveOV_OVADD, OV_OVADD);
+ PSB_WVDC32(dev_priv->saveOV_OGAMC0, OV_OGAMC0);
+ PSB_WVDC32(dev_priv->saveOV_OGAMC1, OV_OGAMC1);
+ PSB_WVDC32(dev_priv->saveOV_OGAMC2, OV_OGAMC2);
+ PSB_WVDC32(dev_priv->saveOV_OGAMC3, OV_OGAMC3);
+ PSB_WVDC32(dev_priv->saveOV_OGAMC4, OV_OGAMC4);
+ PSB_WVDC32(dev_priv->saveOV_OGAMC5, OV_OGAMC5);
+
+ /* DPST registers */
+ PSB_WVDC32(dev_priv->saveHISTOGRAM_INT_CONTROL_REG,
+ HISTOGRAM_INT_CONTROL);
+ PSB_WVDC32(dev_priv->saveHISTOGRAM_LOGIC_CONTROL_REG,
+ HISTOGRAM_LOGIC_CONTROL);
+ PSB_WVDC32(dev_priv->savePWM_CONTROL_LOGIC, PWM_CONTROL_LOGIC);
+
+ return 0;
+}
+
+/**
+ * oaktrail_power_down - power down the display island
+ * @dev: our DRM device
+ *
+ * Power down the display interface of our device
+ */
+static int oaktrail_power_down(struct drm_device *dev)
+{
+ struct drm_psb_private *dev_priv = dev->dev_private;
+ u32 pwr_mask ;
+ u32 pwr_sts;
+
+ pwr_mask = PSB_PWRGT_DISPLAY_MASK;
+ outl(pwr_mask, dev_priv->ospm_base + PSB_PM_SSC);
+
+ while (true) {
+ pwr_sts = inl(dev_priv->ospm_base + PSB_PM_SSS);
+ if ((pwr_sts & pwr_mask) == pwr_mask)
+ break;
+ else
+ udelay(10);
+ }
+ return 0;
+}
+
+/*
+ * oaktrail_power_up
+ *
+ * Restore power to the specified island(s) (powergating)
+ */
+static int oaktrail_power_up(struct drm_device *dev)
+{
+ struct drm_psb_private *dev_priv = dev->dev_private;
+ u32 pwr_mask = PSB_PWRGT_DISPLAY_MASK;
+ u32 pwr_sts, pwr_cnt;
+
+ pwr_cnt = inl(dev_priv->ospm_base + PSB_PM_SSC);
+ pwr_cnt &= ~pwr_mask;
+ outl(pwr_cnt, (dev_priv->ospm_base + PSB_PM_SSC));
+
+ while (true) {
+ pwr_sts = inl(dev_priv->ospm_base + PSB_PM_SSS);
+ if ((pwr_sts & pwr_mask) == 0)
+ break;
+ else
+ udelay(10);
+ }
+ return 0;
+}
+
+
+static void oaktrail_teardown(struct drm_device *dev)
+{
+ oaktrail_hdmi_teardown(dev);
+}
+
+const struct psb_ops oaktrail_chip_ops = {
+ .name = "Oaktrail",
+ .accel_2d = 1,
+ .pipes = 2,
+ .crtcs = 2,
+ .sgx_offset = MRST_SGX_OFFSET,
+
+ .chip_setup = mid_chip_setup,
+ .chip_teardown = oaktrail_teardown,
+ .crtc_helper = &oaktrail_helper_funcs,
+ .crtc_funcs = &psb_intel_crtc_funcs,
+
+ .output_init = oaktrail_output_init,
+
+#ifdef CONFIG_BACKLIGHT_CLASS_DEVICE
+ .backlight_init = oaktrail_backlight_init,
+#endif
+
+ .init_pm = oaktrail_init_pm,
+ .save_regs = oaktrail_save_display_registers,
+ .restore_regs = oaktrail_restore_display_registers,
+ .power_down = oaktrail_power_down,
+ .power_up = oaktrail_power_up,
+
+ .i2c_bus = 1,
+};
