![Benjamin Herrenschmidt](/assets/img/avatar_default.png)
Implement support for HW color expansion of 1bpp images, along with some improvements to the FIFO handling and other accel operations. The offset fixup code is now unnecessary as the fbcon core will call our set_par upon switch back from KD_GRAPHICS before anything else happens. I removed it as it would slow down accel operations. The fifo wait has been improved to avoid hitting the HW register as often, and the various accel ops are now performing better caching of register values. Overall, this improve accel performances. The imageblit acceleration does result in a small overall regression in performances on some machines (on the order of 5% on some x86), probably becaus the SW path provides a better bus utilisation, but I decided to ingnore that as the performances is still very good, and on the other hand, some machines such as some sparc64 get a 3 fold performance improvement. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Acked-by: David S. Miller <davem@davemloft.net> Cc: Krzysztof Halasa <khc@pm.waw.pl> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
217 lines
5.9 KiB
C
217 lines
5.9 KiB
C
/*
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* Backlight code for ATI Radeon based graphic cards
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*
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* Copyright (c) 2000 Ani Joshi <ajoshi@kernel.crashing.org>
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* Copyright (c) 2003 Benjamin Herrenschmidt <benh@kernel.crashing.org>
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* Copyright (c) 2006 Michael Hanselmann <linux-kernel@hansmi.ch>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include "radeonfb.h"
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#include <linux/backlight.h>
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#ifdef CONFIG_PMAC_BACKLIGHT
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#include <asm/backlight.h>
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#endif
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#define MAX_RADEON_LEVEL 0xFF
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struct radeon_bl_privdata {
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struct radeonfb_info *rinfo;
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uint8_t negative;
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};
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static int radeon_bl_get_level_brightness(struct radeon_bl_privdata *pdata,
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int level)
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{
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int rlevel;
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/* Get and convert the value */
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/* No locking of bl_curve since we read a single value */
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rlevel = pdata->rinfo->info->bl_curve[level] *
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FB_BACKLIGHT_MAX / MAX_RADEON_LEVEL;
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if (rlevel < 0)
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rlevel = 0;
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else if (rlevel > MAX_RADEON_LEVEL)
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rlevel = MAX_RADEON_LEVEL;
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if (pdata->negative)
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rlevel = MAX_RADEON_LEVEL - rlevel;
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return rlevel;
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}
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static int radeon_bl_update_status(struct backlight_device *bd)
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{
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struct radeon_bl_privdata *pdata = bl_get_data(bd);
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struct radeonfb_info *rinfo = pdata->rinfo;
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u32 lvds_gen_cntl, tmpPixclksCntl;
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int level;
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if (rinfo->mon1_type != MT_LCD)
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return 0;
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/* We turn off the LCD completely instead of just dimming the
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* backlight. This provides some greater power saving and the display
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* is useless without backlight anyway.
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*/
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if (bd->props.power != FB_BLANK_UNBLANK ||
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bd->props.fb_blank != FB_BLANK_UNBLANK)
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level = 0;
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else
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level = bd->props.brightness;
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del_timer_sync(&rinfo->lvds_timer);
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radeon_engine_idle(rinfo);
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lvds_gen_cntl = INREG(LVDS_GEN_CNTL);
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if (level > 0) {
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lvds_gen_cntl &= ~LVDS_DISPLAY_DIS;
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if (!(lvds_gen_cntl & LVDS_BLON) || !(lvds_gen_cntl & LVDS_ON)) {
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lvds_gen_cntl |= (rinfo->init_state.lvds_gen_cntl & LVDS_DIGON);
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lvds_gen_cntl |= LVDS_BLON | LVDS_EN;
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OUTREG(LVDS_GEN_CNTL, lvds_gen_cntl);
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lvds_gen_cntl &= ~LVDS_BL_MOD_LEVEL_MASK;
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lvds_gen_cntl |=
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(radeon_bl_get_level_brightness(pdata, level) <<
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LVDS_BL_MOD_LEVEL_SHIFT);
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lvds_gen_cntl |= LVDS_ON;
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lvds_gen_cntl |= (rinfo->init_state.lvds_gen_cntl & LVDS_BL_MOD_EN);
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rinfo->pending_lvds_gen_cntl = lvds_gen_cntl;
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mod_timer(&rinfo->lvds_timer,
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jiffies + msecs_to_jiffies(rinfo->panel_info.pwr_delay));
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} else {
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lvds_gen_cntl &= ~LVDS_BL_MOD_LEVEL_MASK;
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lvds_gen_cntl |=
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(radeon_bl_get_level_brightness(pdata, level) <<
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LVDS_BL_MOD_LEVEL_SHIFT);
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OUTREG(LVDS_GEN_CNTL, lvds_gen_cntl);
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}
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rinfo->init_state.lvds_gen_cntl &= ~LVDS_STATE_MASK;
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rinfo->init_state.lvds_gen_cntl |= rinfo->pending_lvds_gen_cntl
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& LVDS_STATE_MASK;
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} else {
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/* Asic bug, when turning off LVDS_ON, we have to make sure
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RADEON_PIXCLK_LVDS_ALWAYS_ON bit is off
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*/
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tmpPixclksCntl = INPLL(PIXCLKS_CNTL);
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if (rinfo->is_mobility || rinfo->is_IGP)
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OUTPLLP(PIXCLKS_CNTL, 0, ~PIXCLK_LVDS_ALWAYS_ONb);
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lvds_gen_cntl &= ~(LVDS_BL_MOD_LEVEL_MASK | LVDS_BL_MOD_EN);
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lvds_gen_cntl |= (radeon_bl_get_level_brightness(pdata, 0) <<
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LVDS_BL_MOD_LEVEL_SHIFT);
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lvds_gen_cntl |= LVDS_DISPLAY_DIS;
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OUTREG(LVDS_GEN_CNTL, lvds_gen_cntl);
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udelay(100);
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lvds_gen_cntl &= ~(LVDS_ON | LVDS_EN);
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OUTREG(LVDS_GEN_CNTL, lvds_gen_cntl);
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lvds_gen_cntl &= ~(LVDS_DIGON);
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rinfo->pending_lvds_gen_cntl = lvds_gen_cntl;
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mod_timer(&rinfo->lvds_timer,
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jiffies + msecs_to_jiffies(rinfo->panel_info.pwr_delay));
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if (rinfo->is_mobility || rinfo->is_IGP)
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OUTPLL(PIXCLKS_CNTL, tmpPixclksCntl);
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}
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rinfo->init_state.lvds_gen_cntl &= ~LVDS_STATE_MASK;
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rinfo->init_state.lvds_gen_cntl |= (lvds_gen_cntl & LVDS_STATE_MASK);
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return 0;
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}
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static int radeon_bl_get_brightness(struct backlight_device *bd)
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{
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return bd->props.brightness;
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}
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static struct backlight_ops radeon_bl_data = {
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.get_brightness = radeon_bl_get_brightness,
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.update_status = radeon_bl_update_status,
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};
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void radeonfb_bl_init(struct radeonfb_info *rinfo)
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{
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struct backlight_device *bd;
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struct radeon_bl_privdata *pdata;
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char name[12];
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if (rinfo->mon1_type != MT_LCD)
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return;
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#ifdef CONFIG_PMAC_BACKLIGHT
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if (!pmac_has_backlight_type("ati") &&
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!pmac_has_backlight_type("mnca"))
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return;
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#endif
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pdata = kmalloc(sizeof(struct radeon_bl_privdata), GFP_KERNEL);
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if (!pdata) {
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printk("radeonfb: Memory allocation failed\n");
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goto error;
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}
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snprintf(name, sizeof(name), "radeonbl%d", rinfo->info->node);
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bd = backlight_device_register(name, rinfo->info->dev, pdata, &radeon_bl_data);
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if (IS_ERR(bd)) {
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rinfo->info->bl_dev = NULL;
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printk("radeonfb: Backlight registration failed\n");
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goto error;
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}
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pdata->rinfo = rinfo;
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/* Pardon me for that hack... maybe some day we can figure out in what
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* direction backlight should work on a given panel?
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*/
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pdata->negative =
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(rinfo->family != CHIP_FAMILY_RV200 &&
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rinfo->family != CHIP_FAMILY_RV250 &&
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rinfo->family != CHIP_FAMILY_RV280 &&
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rinfo->family != CHIP_FAMILY_RV350);
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#ifdef CONFIG_PMAC_BACKLIGHT
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pdata->negative = pdata->negative ||
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machine_is_compatible("PowerBook4,3") ||
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machine_is_compatible("PowerBook6,3") ||
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machine_is_compatible("PowerBook6,5");
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#endif
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rinfo->info->bl_dev = bd;
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fb_bl_default_curve(rinfo->info, 0,
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63 * FB_BACKLIGHT_MAX / MAX_RADEON_LEVEL,
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217 * FB_BACKLIGHT_MAX / MAX_RADEON_LEVEL);
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bd->props.max_brightness = FB_BACKLIGHT_LEVELS - 1;
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bd->props.brightness = bd->props.max_brightness;
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bd->props.power = FB_BLANK_UNBLANK;
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backlight_update_status(bd);
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printk("radeonfb: Backlight initialized (%s)\n", name);
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return;
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error:
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kfree(pdata);
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return;
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}
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void radeonfb_bl_exit(struct radeonfb_info *rinfo)
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{
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struct backlight_device *bd = rinfo->info->bl_dev;
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if (bd) {
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struct radeon_bl_privdata *pdata;
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pdata = bl_get_data(bd);
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backlight_device_unregister(bd);
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kfree(pdata);
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rinfo->info->bl_dev = NULL;
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printk("radeonfb: Backlight unloaded\n");
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}
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}
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