diff options
| -rw-r--r-- | drivers/gpu/drm/gma500/Makefile | 1 | ||||
| -rw-r--r-- | drivers/gpu/drm/gma500/gma_display.c | 143 | ||||
| -rw-r--r-- | drivers/gpu/drm/gma500/gma_display.h | 74 | ||||
| -rw-r--r-- | drivers/gpu/drm/gma500/psb_drv.h | 2 | ||||
| -rw-r--r-- | drivers/gpu/drm/gma500/psb_intel_display.c | 3 | ||||
| -rw-r--r-- | drivers/gpu/drm/gma500/psb_intel_drv.h | 3 |
6 files changed, 226 insertions, 0 deletions
diff --git a/drivers/gpu/drm/gma500/Makefile b/drivers/gpu/drm/gma500/Makefile index 7a2d40a..e9064dd 100644 --- a/drivers/gpu/drm/gma500/Makefile +++ b/drivers/gpu/drm/gma500/Makefile @@ -15,6 +15,7 @@ gma500_gfx-y += \ mmu.o \ power.o \ psb_drv.o \ + gma_display.o \ psb_intel_display.o \ psb_intel_lvds.o \ psb_intel_modes.o \ diff --git a/drivers/gpu/drm/gma500/gma_display.c b/drivers/gpu/drm/gma500/gma_display.c new file mode 100644 index 0000000..8f66d5c --- /dev/null +++ b/drivers/gpu/drm/gma500/gma_display.c @@ -0,0 +1,143 @@ +/* + * Copyright © 2006-2011 Intel Corporation + * + * 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. + * + * Authors: + * Eric Anholt <eric@anholt.net> + * Patrik Jakobsson <patrik.r.jakobsson@gmail.com> + */ + +#include <drm/drmP.h> +#include "gma_display.h" +#include "psb_intel_drv.h" +#include "psb_intel_reg.h" +#include "psb_drv.h" + +/** + * Returns whether any output on the specified pipe is of the specified type + */ +bool gma_pipe_has_type(struct drm_crtc *crtc, int type) +{ + struct drm_device *dev = crtc->dev; + struct drm_mode_config *mode_config = &dev->mode_config; + struct drm_connector *l_entry; + + list_for_each_entry(l_entry, &mode_config->connector_list, head) { + if (l_entry->encoder && l_entry->encoder->crtc == crtc) { + struct psb_intel_encoder *psb_intel_encoder = + psb_intel_attached_encoder(l_entry); + if (psb_intel_encoder->type == type) + return true; + } + } + + return false; +} + +#define GMA_PLL_INVALID(s) { /* DRM_ERROR(s); */ return false; } + +bool gma_pll_is_valid(struct drm_crtc *crtc, + const struct gma_limit_t *limit, + struct gma_clock_t *clock) +{ + if (clock->p1 < limit->p1.min || limit->p1.max < clock->p1) + GMA_PLL_INVALID("p1 out of range"); + if (clock->p < limit->p.min || limit->p.max < clock->p) + GMA_PLL_INVALID("p out of range"); + if (clock->m2 < limit->m2.min || limit->m2.max < clock->m2) + GMA_PLL_INVALID("m2 out of range"); + if (clock->m1 < limit->m1.min || limit->m1.max < clock->m1) + GMA_PLL_INVALID("m1 out of range"); + /* On CDV m1 is always 0 */ + if (clock->m1 <= clock->m2 && clock->m1 != 0) + GMA_PLL_INVALID("m1 <= m2 && m1 != 0"); + if (clock->m < limit->m.min || limit->m.max < clock->m) + GMA_PLL_INVALID("m out of range"); + if (clock->n < limit->n.min || limit->n.max < clock->n) + GMA_PLL_INVALID("n out of range"); + if (clock->vco < limit->vco.min || limit->vco.max < clock->vco) + GMA_PLL_INVALID("vco out of range"); + /* XXX: We may need to be checking "Dot clock" + * depending on the multiplier, connector, etc., + * rather than just a single range. + */ + if (clock->dot < limit->dot.min || limit->dot.max < clock->dot) + GMA_PLL_INVALID("dot out of range"); + + return true; +} + +bool gma_find_best_pll(const struct gma_limit_t *limit, + struct drm_crtc *crtc, int target, int refclk, + struct gma_clock_t *best_clock) +{ + struct drm_device *dev = crtc->dev; + const struct gma_clock_funcs *clock_funcs = + to_psb_intel_crtc(crtc)->clock_funcs; + struct gma_clock_t clock; + int err = target; + + if (gma_pipe_has_type(crtc, INTEL_OUTPUT_LVDS) && + (REG_READ(LVDS) & LVDS_PORT_EN) != 0) { + /* + * For LVDS, if the panel is on, just rely on its current + * settings for dual-channel. We haven't figured out how to + * reliably set up different single/dual channel state, if we + * even can. + */ + if ((REG_READ(LVDS) & LVDS_CLKB_POWER_MASK) == + LVDS_CLKB_POWER_UP) + clock.p2 = limit->p2.p2_fast; + else + clock.p2 = limit->p2.p2_slow; + } else { + if (target < limit->p2.dot_limit) + clock.p2 = limit->p2.p2_slow; + else + clock.p2 = limit->p2.p2_fast; + } + + memset(best_clock, 0, sizeof(*best_clock)); + + /* m1 is always 0 on CDV so the outmost loop will run just once */ + for (clock.m1 = limit->m1.min; clock.m1 <= limit->m1.max; clock.m1++) { + for (clock.m2 = limit->m2.min; + (clock.m2 < clock.m1 || clock.m1 == 0) && + clock.m2 <= limit->m2.max; clock.m2++) { + for (clock.n = limit->n.min; + clock.n <= limit->n.max; clock.n++) { + for (clock.p1 = limit->p1.min; + clock.p1 <= limit->p1.max; + clock.p1++) { + int this_err; + + clock_funcs->clock(refclk, &clock); + + if (!clock_funcs->pll_is_valid(crtc, + limit, &clock)) + continue; + + this_err = abs(clock.dot - target); + if (this_err < err) { + *best_clock = clock; + err = this_err; + } + } + } + } + } + + return err != target; +} diff --git a/drivers/gpu/drm/gma500/gma_display.h b/drivers/gpu/drm/gma500/gma_display.h new file mode 100644 index 0000000..a5d8aa3 --- /dev/null +++ b/drivers/gpu/drm/gma500/gma_display.h @@ -0,0 +1,74 @@ +/* + * Copyright © 2006-2011 Intel Corporation + * + * 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. + * + * Authors: + * Eric Anholt <eric@anholt.net> + * Patrik Jakobsson <patrik.r.jakobsson@gmail.com> + */ + +#ifndef _GMA_DISPLAY_H_ +#define _GMA_DISPLAY_H_ + +struct gma_clock_t { + /* given values */ + int n; + int m1, m2; + int p1, p2; + /* derived values */ + int dot; + int vco; + int m; + int p; +}; + +struct gma_range_t { + int min, max; +}; + +struct gma_p2_t { + int dot_limit; + int p2_slow, p2_fast; +}; + +struct gma_limit_t { + struct gma_range_t dot, vco, n, m, m1, m2, p, p1; + struct gma_p2_t p2; + bool (*find_pll)(const struct gma_limit_t *, struct drm_crtc *, + int target, int refclk, + struct gma_clock_t *best_clock); +}; + +struct gma_clock_funcs { + void (*clock)(int refclk, struct gma_clock_t *clock); + const struct gma_limit_t *(*limit)(struct drm_crtc *crtc, int refclk); + bool (*pll_is_valid)(struct drm_crtc *crtc, + const struct gma_limit_t *limit, + struct gma_clock_t *clock); +}; + +/* Common pipe related functions */ +extern bool gma_pipe_has_type(struct drm_crtc *crtc, int type); + +/* Common clock related functions */ +extern const struct gma_limit_t *gma_limit(struct drm_crtc *crtc, int refclk); +extern void gma_clock(int refclk, struct gma_clock_t *clock); +extern bool gma_pll_is_valid(struct drm_crtc *crtc, + const struct gma_limit_t *limit, + struct gma_clock_t *clock); +extern bool gma_find_best_pll(const struct gma_limit_t *limit, + struct drm_crtc *crtc, int target, int refclk, + struct gma_clock_t *best_clock); +#endif diff --git a/drivers/gpu/drm/gma500/psb_drv.h b/drivers/gpu/drm/gma500/psb_drv.h index 6053b8a..eeed88c 100644 --- a/drivers/gpu/drm/gma500/psb_drv.h +++ b/drivers/gpu/drm/gma500/psb_drv.h @@ -27,6 +27,7 @@ #include <drm/gma_drm.h> #include "psb_reg.h" #include "psb_intel_drv.h" +#include "gma_display.h" #include "intel_bios.h" #include "gtt.h" #include "power.h" @@ -675,6 +676,7 @@ struct psb_ops { /* Sub functions */ struct drm_crtc_helper_funcs const *crtc_helper; struct drm_crtc_funcs const *crtc_funcs; + const struct gma_clock_funcs *clock_funcs; /* Setup hooks */ int (*chip_setup)(struct drm_device *dev); diff --git a/drivers/gpu/drm/gma500/psb_intel_display.c b/drivers/gpu/drm/gma500/psb_intel_display.c index 6666493..0f1d069 100644 --- a/drivers/gpu/drm/gma500/psb_intel_display.c +++ b/drivers/gpu/drm/gma500/psb_intel_display.c @@ -1251,6 +1251,9 @@ void psb_intel_crtc_init(struct drm_device *dev, int pipe, /* Set the CRTC operations from the chip specific data */ drm_crtc_init(dev, &psb_intel_crtc->base, dev_priv->ops->crtc_funcs); + /* Set the CRTC clock functions from chip specific data */ + psb_intel_crtc->clock_funcs = dev_priv->ops->clock_funcs; + drm_mode_crtc_set_gamma_size(&psb_intel_crtc->base, 256); psb_intel_crtc->pipe = pipe; psb_intel_crtc->plane = pipe; diff --git a/drivers/gpu/drm/gma500/psb_intel_drv.h b/drivers/gpu/drm/gma500/psb_intel_drv.h index 4dcae42..bfe0408 100644 --- a/drivers/gpu/drm/gma500/psb_intel_drv.h +++ b/drivers/gpu/drm/gma500/psb_intel_drv.h @@ -24,6 +24,7 @@ #include <drm/drm_crtc.h> #include <drm/drm_crtc_helper.h> #include <linux/gpio.h> +#include "gma_display.h" /* * Display related stuff @@ -188,6 +189,8 @@ struct psb_intel_crtc { /* Saved Crtc HW states */ struct psb_intel_crtc_state *crtc_state; + + const struct gma_clock_funcs *clock_funcs; }; #define to_psb_intel_crtc(x) \ |