123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332333334335336337338339340341342343344345346347348349350351352353354355356357358359360 |
- /**************************************************************************
- * 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 <drm/drmP.h>
- #include <drm/drm.h>
- #include <drm/gma_drm.h>
- #include "psb_drv.h"
- #include "psb_reg.h"
- #include "psb_intel_reg.h"
- #include "intel_bios.h"
- #include "psb_device.h"
- #include "gma_device.h"
- static int psb_output_init(struct drm_device *dev)
- {
- struct drm_psb_private *dev_priv = dev->dev_private;
- psb_intel_lvds_init(dev, &dev_priv->mode_dev);
- psb_intel_sdvo_init(dev, SDVOB);
- return 0;
- }
- #ifdef CONFIG_BACKLIGHT_CLASS_DEVICE
- /*
- * Poulsbo Backlight Interfaces
- */
- #define BLC_PWM_PRECISION_FACTOR 100 /* 10000000 */
- #define BLC_PWM_FREQ_CALC_CONSTANT 32
- #define MHz 1000000
- #define PSB_BLC_PWM_PRECISION_FACTOR 10
- #define PSB_BLC_MAX_PWM_REG_FREQ 0xFFFE
- #define PSB_BLC_MIN_PWM_REG_FREQ 0x2
- #define PSB_BACKLIGHT_PWM_POLARITY_BIT_CLEAR (0xFFFE)
- #define PSB_BACKLIGHT_PWM_CTL_SHIFT (16)
- static int psb_brightness;
- static struct backlight_device *psb_backlight_device;
- static int psb_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 psb_brightness;
- }
- static int psb_backlight_setup(struct drm_device *dev)
- {
- struct drm_psb_private *dev_priv = dev->dev_private;
- unsigned long core_clock;
- /* u32 bl_max_freq; */
- /* unsigned long value; */
- u16 bl_max_freq;
- uint32_t value;
- uint32_t blc_pwm_precision_factor;
- /* get bl_max_freq and pol from dev_priv*/
- if (!dev_priv->lvds_bl) {
- dev_err(dev->dev, "Has no valid LVDS backlight info\n");
- return -ENOENT;
- }
- bl_max_freq = dev_priv->lvds_bl->freq;
- blc_pwm_precision_factor = PSB_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)PSB_BLC_MAX_PWM_REG_FREQ ||
- value < (unsigned long long)PSB_BLC_MIN_PWM_REG_FREQ)
- return -ERANGE;
- else {
- value &= PSB_BACKLIGHT_PWM_POLARITY_BIT_CLEAR;
- REG_WRITE(BLC_PWM_CTL,
- (value << PSB_BACKLIGHT_PWM_CTL_SHIFT) | (value));
- }
- return 0;
- }
- static int psb_set_brightness(struct backlight_device *bd)
- {
- struct drm_device *dev = bl_get_data(psb_backlight_device);
- int level = bd->props.brightness;
- /* Percentage 1-100% being valid */
- if (level < 1)
- level = 1;
- psb_intel_lvds_set_brightness(dev, level);
- psb_brightness = level;
- return 0;
- }
- static const struct backlight_ops psb_ops = {
- .get_brightness = psb_get_brightness,
- .update_status = psb_set_brightness,
- };
- static int psb_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;
- psb_backlight_device = backlight_device_register("psb-bl",
- NULL, (void *)dev, &psb_ops, &props);
- if (IS_ERR(psb_backlight_device))
- return PTR_ERR(psb_backlight_device);
- ret = psb_backlight_setup(dev);
- if (ret < 0) {
- backlight_device_unregister(psb_backlight_device);
- psb_backlight_device = NULL;
- return ret;
- }
- psb_backlight_device->props.brightness = 100;
- psb_backlight_device->props.max_brightness = 100;
- backlight_update_status(psb_backlight_device);
- dev_priv->backlight_device = psb_backlight_device;
- /* This must occur after the backlight is properly initialised */
- psb_lid_timer_init(dev_priv);
- return 0;
- }
- #endif
- /*
- * Provide the Poulsbo specific chip logic and low level methods
- * for power management
- */
- static void psb_init_pm(struct drm_device *dev)
- {
- struct drm_psb_private *dev_priv = dev->dev_private;
- u32 gating = PSB_RSGX32(PSB_CR_CLKGATECTL);
- gating &= ~3; /* Disable 2D clock gating */
- gating |= 1;
- PSB_WSGX32(gating, PSB_CR_CLKGATECTL);
- PSB_RSGX32(PSB_CR_CLKGATECTL);
- }
- /**
- * psb_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 psb_save_display_registers(struct drm_device *dev)
- {
- struct drm_psb_private *dev_priv = dev->dev_private;
- struct drm_crtc *crtc;
- struct drm_connector *connector;
- struct psb_state *regs = &dev_priv->regs.psb;
- /* Display arbitration control + watermarks */
- regs->saveDSPARB = PSB_RVDC32(DSPARB);
- regs->saveDSPFW1 = PSB_RVDC32(DSPFW1);
- regs->saveDSPFW2 = PSB_RVDC32(DSPFW2);
- regs->saveDSPFW3 = PSB_RVDC32(DSPFW3);
- regs->saveDSPFW4 = PSB_RVDC32(DSPFW4);
- regs->saveDSPFW5 = PSB_RVDC32(DSPFW5);
- regs->saveDSPFW6 = PSB_RVDC32(DSPFW6);
- regs->saveCHICKENBIT = PSB_RVDC32(DSPCHICKENBIT);
- /* Save crtc and output state */
- drm_modeset_lock_all(dev);
- list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
- if (drm_helper_crtc_in_use(crtc))
- crtc->funcs->save(crtc);
- }
- list_for_each_entry(connector, &dev->mode_config.connector_list, head)
- if (connector->funcs->save)
- connector->funcs->save(connector);
- drm_modeset_unlock_all(dev);
- return 0;
- }
- /**
- * psb_restore_display_registers - restore lost register state
- * @dev: our DRM device
- *
- * Restore register state that was lost during suspend and resume.
- */
- static int psb_restore_display_registers(struct drm_device *dev)
- {
- struct drm_psb_private *dev_priv = dev->dev_private;
- struct drm_crtc *crtc;
- struct drm_connector *connector;
- struct psb_state *regs = &dev_priv->regs.psb;
- /* Display arbitration + watermarks */
- PSB_WVDC32(regs->saveDSPARB, DSPARB);
- PSB_WVDC32(regs->saveDSPFW1, DSPFW1);
- PSB_WVDC32(regs->saveDSPFW2, DSPFW2);
- PSB_WVDC32(regs->saveDSPFW3, DSPFW3);
- PSB_WVDC32(regs->saveDSPFW4, DSPFW4);
- PSB_WVDC32(regs->saveDSPFW5, DSPFW5);
- PSB_WVDC32(regs->saveDSPFW6, DSPFW6);
- PSB_WVDC32(regs->saveCHICKENBIT, DSPCHICKENBIT);
- /*make sure VGA plane is off. it initializes to on after reset!*/
- PSB_WVDC32(0x80000000, VGACNTRL);
- drm_modeset_lock_all(dev);
- list_for_each_entry(crtc, &dev->mode_config.crtc_list, head)
- if (drm_helper_crtc_in_use(crtc))
- crtc->funcs->restore(crtc);
- list_for_each_entry(connector, &dev->mode_config.connector_list, head)
- if (connector->funcs->restore)
- connector->funcs->restore(connector);
- drm_modeset_unlock_all(dev);
- return 0;
- }
- static int psb_power_down(struct drm_device *dev)
- {
- return 0;
- }
- static int psb_power_up(struct drm_device *dev)
- {
- return 0;
- }
- /* Poulsbo */
- static const struct psb_offset psb_regmap[2] = {
- {
- .fp0 = FPA0,
- .fp1 = FPA1,
- .cntr = DSPACNTR,
- .conf = PIPEACONF,
- .src = PIPEASRC,
- .dpll = DPLL_A,
- .htotal = HTOTAL_A,
- .hblank = HBLANK_A,
- .hsync = HSYNC_A,
- .vtotal = VTOTAL_A,
- .vblank = VBLANK_A,
- .vsync = VSYNC_A,
- .stride = DSPASTRIDE,
- .size = DSPASIZE,
- .pos = DSPAPOS,
- .base = DSPABASE,
- .surf = DSPASURF,
- .addr = DSPABASE,
- .status = PIPEASTAT,
- .linoff = DSPALINOFF,
- .tileoff = DSPATILEOFF,
- .palette = PALETTE_A,
- },
- {
- .fp0 = FPB0,
- .fp1 = FPB1,
- .cntr = DSPBCNTR,
- .conf = PIPEBCONF,
- .src = PIPEBSRC,
- .dpll = DPLL_B,
- .htotal = HTOTAL_B,
- .hblank = HBLANK_B,
- .hsync = HSYNC_B,
- .vtotal = VTOTAL_B,
- .vblank = VBLANK_B,
- .vsync = VSYNC_B,
- .stride = DSPBSTRIDE,
- .size = DSPBSIZE,
- .pos = DSPBPOS,
- .base = DSPBBASE,
- .surf = DSPBSURF,
- .addr = DSPBBASE,
- .status = PIPEBSTAT,
- .linoff = DSPBLINOFF,
- .tileoff = DSPBTILEOFF,
- .palette = PALETTE_B,
- }
- };
- static int psb_chip_setup(struct drm_device *dev)
- {
- struct drm_psb_private *dev_priv = dev->dev_private;
- dev_priv->regmap = psb_regmap;
- gma_get_core_freq(dev);
- gma_intel_setup_gmbus(dev);
- psb_intel_opregion_init(dev);
- psb_intel_init_bios(dev);
- return 0;
- }
- static void psb_chip_teardown(struct drm_device *dev)
- {
- struct drm_psb_private *dev_priv = dev->dev_private;
- psb_lid_timer_takedown(dev_priv);
- gma_intel_teardown_gmbus(dev);
- }
- const struct psb_ops psb_chip_ops = {
- .name = "Poulsbo",
- .accel_2d = 1,
- .pipes = 2,
- .crtcs = 2,
- .hdmi_mask = (1 << 0),
- .lvds_mask = (1 << 1),
- .sdvo_mask = (1 << 0),
- .cursor_needs_phys = 1,
- .sgx_offset = PSB_SGX_OFFSET,
- .chip_setup = psb_chip_setup,
- .chip_teardown = psb_chip_teardown,
- .crtc_helper = &psb_intel_helper_funcs,
- .crtc_funcs = &psb_intel_crtc_funcs,
- .clock_funcs = &psb_clock_funcs,
- .output_init = psb_output_init,
- #ifdef CONFIG_BACKLIGHT_CLASS_DEVICE
- .backlight_init = psb_backlight_init,
- #endif
- .init_pm = psb_init_pm,
- .save_regs = psb_save_display_registers,
- .restore_regs = psb_restore_display_registers,
- .power_down = psb_power_down,
- .power_up = psb_power_up,
- };
|