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path: root/drivers/gpu/drm/gma500/psb_intel_display.c
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Diffstat (limited to 'drivers/gpu/drm/gma500/psb_intel_display.c')
-rw-r--r--drivers/gpu/drm/gma500/psb_intel_display.c585
1 files changed, 585 insertions, 0 deletions
diff --git a/drivers/gpu/drm/gma500/psb_intel_display.c b/drivers/gpu/drm/gma500/psb_intel_display.c
new file mode 100644
index 000000000..6659da88f
--- /dev/null
+++ b/drivers/gpu/drm/gma500/psb_intel_display.c
@@ -0,0 +1,585 @@
+/*
+ * 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>
+ */
+
+#include <linux/i2c.h>
+
+#include <drm/drmP.h>
+#include <drm/drm_plane_helper.h>
+#include "framebuffer.h"
+#include "psb_drv.h"
+#include "psb_intel_drv.h"
+#include "psb_intel_reg.h"
+#include "gma_display.h"
+#include "power.h"
+
+#define INTEL_LIMIT_I9XX_SDVO_DAC 0
+#define INTEL_LIMIT_I9XX_LVDS 1
+
+static const struct gma_limit_t psb_intel_limits[] = {
+ { /* INTEL_LIMIT_I9XX_SDVO_DAC */
+ .dot = {.min = 20000, .max = 400000},
+ .vco = {.min = 1400000, .max = 2800000},
+ .n = {.min = 1, .max = 6},
+ .m = {.min = 70, .max = 120},
+ .m1 = {.min = 8, .max = 18},
+ .m2 = {.min = 3, .max = 7},
+ .p = {.min = 5, .max = 80},
+ .p1 = {.min = 1, .max = 8},
+ .p2 = {.dot_limit = 200000, .p2_slow = 10, .p2_fast = 5},
+ .find_pll = gma_find_best_pll,
+ },
+ { /* INTEL_LIMIT_I9XX_LVDS */
+ .dot = {.min = 20000, .max = 400000},
+ .vco = {.min = 1400000, .max = 2800000},
+ .n = {.min = 1, .max = 6},
+ .m = {.min = 70, .max = 120},
+ .m1 = {.min = 8, .max = 18},
+ .m2 = {.min = 3, .max = 7},
+ .p = {.min = 7, .max = 98},
+ .p1 = {.min = 1, .max = 8},
+ /* The single-channel range is 25-112Mhz, and dual-channel
+ * is 80-224Mhz. Prefer single channel as much as possible.
+ */
+ .p2 = {.dot_limit = 112000, .p2_slow = 14, .p2_fast = 7},
+ .find_pll = gma_find_best_pll,
+ },
+};
+
+static const struct gma_limit_t *psb_intel_limit(struct drm_crtc *crtc,
+ int refclk)
+{
+ const struct gma_limit_t *limit;
+
+ if (gma_pipe_has_type(crtc, INTEL_OUTPUT_LVDS))
+ limit = &psb_intel_limits[INTEL_LIMIT_I9XX_LVDS];
+ else
+ limit = &psb_intel_limits[INTEL_LIMIT_I9XX_SDVO_DAC];
+ return limit;
+}
+
+static void psb_intel_clock(int refclk, struct gma_clock_t *clock)
+{
+ clock->m = 5 * (clock->m1 + 2) + (clock->m2 + 2);
+ clock->p = clock->p1 * clock->p2;
+ clock->vco = refclk * clock->m / (clock->n + 2);
+ clock->dot = clock->vco / clock->p;
+}
+
+/**
+ * Return the pipe currently connected to the panel fitter,
+ * or -1 if the panel fitter is not present or not in use
+ */
+static int psb_intel_panel_fitter_pipe(struct drm_device *dev)
+{
+ u32 pfit_control;
+
+ pfit_control = REG_READ(PFIT_CONTROL);
+
+ /* See if the panel fitter is in use */
+ if ((pfit_control & PFIT_ENABLE) == 0)
+ return -1;
+ /* Must be on PIPE 1 for PSB */
+ return 1;
+}
+
+static int psb_intel_crtc_mode_set(struct drm_crtc *crtc,
+ struct drm_display_mode *mode,
+ struct drm_display_mode *adjusted_mode,
+ int x, int y,
+ struct drm_framebuffer *old_fb)
+{
+ struct drm_device *dev = crtc->dev;
+ struct drm_psb_private *dev_priv = dev->dev_private;
+ struct gma_crtc *gma_crtc = to_gma_crtc(crtc);
+ const struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
+ int pipe = gma_crtc->pipe;
+ const struct psb_offset *map = &dev_priv->regmap[pipe];
+ int refclk;
+ struct gma_clock_t clock;
+ u32 dpll = 0, fp = 0, dspcntr, pipeconf;
+ bool ok, is_sdvo = false;
+ bool is_lvds = false, is_tv = false;
+ struct drm_mode_config *mode_config = &dev->mode_config;
+ struct drm_connector *connector;
+ const struct gma_limit_t *limit;
+
+ /* No scan out no play */
+ if (crtc->primary->fb == NULL) {
+ crtc_funcs->mode_set_base(crtc, x, y, old_fb);
+ return 0;
+ }
+
+ list_for_each_entry(connector, &mode_config->connector_list, head) {
+ struct gma_encoder *gma_encoder = gma_attached_encoder(connector);
+
+ if (!connector->encoder
+ || connector->encoder->crtc != crtc)
+ continue;
+
+ switch (gma_encoder->type) {
+ case INTEL_OUTPUT_LVDS:
+ is_lvds = true;
+ break;
+ case INTEL_OUTPUT_SDVO:
+ is_sdvo = true;
+ break;
+ case INTEL_OUTPUT_TVOUT:
+ is_tv = true;
+ break;
+ }
+ }
+
+ refclk = 96000;
+
+ limit = gma_crtc->clock_funcs->limit(crtc, refclk);
+
+ ok = limit->find_pll(limit, crtc, adjusted_mode->clock, refclk,
+ &clock);
+ if (!ok) {
+ DRM_ERROR("Couldn't find PLL settings for mode! target: %d, actual: %d",
+ adjusted_mode->clock, clock.dot);
+ return 0;
+ }
+
+ fp = clock.n << 16 | clock.m1 << 8 | clock.m2;
+
+ dpll = DPLL_VGA_MODE_DIS;
+ if (is_lvds) {
+ dpll |= DPLLB_MODE_LVDS;
+ dpll |= DPLL_DVO_HIGH_SPEED;
+ } else
+ dpll |= DPLLB_MODE_DAC_SERIAL;
+ if (is_sdvo) {
+ int sdvo_pixel_multiply =
+ adjusted_mode->clock / mode->clock;
+ dpll |= DPLL_DVO_HIGH_SPEED;
+ dpll |=
+ (sdvo_pixel_multiply - 1) << SDVO_MULTIPLIER_SHIFT_HIRES;
+ }
+
+ /* compute bitmask from p1 value */
+ dpll |= (1 << (clock.p1 - 1)) << 16;
+ switch (clock.p2) {
+ case 5:
+ dpll |= DPLL_DAC_SERIAL_P2_CLOCK_DIV_5;
+ break;
+ case 7:
+ dpll |= DPLLB_LVDS_P2_CLOCK_DIV_7;
+ break;
+ case 10:
+ dpll |= DPLL_DAC_SERIAL_P2_CLOCK_DIV_10;
+ break;
+ case 14:
+ dpll |= DPLLB_LVDS_P2_CLOCK_DIV_14;
+ break;
+ }
+
+ if (is_tv) {
+ /* XXX: just matching BIOS for now */
+/* dpll |= PLL_REF_INPUT_TVCLKINBC; */
+ dpll |= 3;
+ }
+ dpll |= PLL_REF_INPUT_DREFCLK;
+
+ /* setup pipeconf */
+ pipeconf = REG_READ(map->conf);
+
+ /* Set up the display plane register */
+ dspcntr = DISPPLANE_GAMMA_ENABLE;
+
+ if (pipe == 0)
+ dspcntr |= DISPPLANE_SEL_PIPE_A;
+ else
+ dspcntr |= DISPPLANE_SEL_PIPE_B;
+
+ dspcntr |= DISPLAY_PLANE_ENABLE;
+ pipeconf |= PIPEACONF_ENABLE;
+ dpll |= DPLL_VCO_ENABLE;
+
+
+ /* Disable the panel fitter if it was on our pipe */
+ if (psb_intel_panel_fitter_pipe(dev) == pipe)
+ REG_WRITE(PFIT_CONTROL, 0);
+
+ drm_mode_debug_printmodeline(mode);
+
+ if (dpll & DPLL_VCO_ENABLE) {
+ REG_WRITE(map->fp0, fp);
+ REG_WRITE(map->dpll, dpll & ~DPLL_VCO_ENABLE);
+ REG_READ(map->dpll);
+ udelay(150);
+ }
+
+ /* The LVDS pin pair needs to be on before the DPLLs are enabled.
+ * This is an exception to the general rule that mode_set doesn't turn
+ * things on.
+ */
+ if (is_lvds) {
+ u32 lvds = REG_READ(LVDS);
+
+ lvds &= ~LVDS_PIPEB_SELECT;
+ if (pipe == 1)
+ lvds |= LVDS_PIPEB_SELECT;
+
+ lvds |= LVDS_PORT_EN | LVDS_A0A2_CLKA_POWER_UP;
+ /* Set the B0-B3 data pairs corresponding to
+ * whether we're going to
+ * set the DPLLs for dual-channel mode or not.
+ */
+ lvds &= ~(LVDS_B0B3_POWER_UP | LVDS_CLKB_POWER_UP);
+ if (clock.p2 == 7)
+ lvds |= LVDS_B0B3_POWER_UP | LVDS_CLKB_POWER_UP;
+
+ /* It would be nice to set 24 vs 18-bit mode (LVDS_A3_POWER_UP)
+ * appropriately here, but we need to look more
+ * thoroughly into how panels behave in the two modes.
+ */
+
+ REG_WRITE(LVDS, lvds);
+ REG_READ(LVDS);
+ }
+
+ REG_WRITE(map->fp0, fp);
+ REG_WRITE(map->dpll, dpll);
+ REG_READ(map->dpll);
+ /* Wait for the clocks to stabilize. */
+ udelay(150);
+
+ /* write it again -- the BIOS does, after all */
+ REG_WRITE(map->dpll, dpll);
+
+ REG_READ(map->dpll);
+ /* Wait for the clocks to stabilize. */
+ udelay(150);
+
+ REG_WRITE(map->htotal, (adjusted_mode->crtc_hdisplay - 1) |
+ ((adjusted_mode->crtc_htotal - 1) << 16));
+ REG_WRITE(map->hblank, (adjusted_mode->crtc_hblank_start - 1) |
+ ((adjusted_mode->crtc_hblank_end - 1) << 16));
+ REG_WRITE(map->hsync, (adjusted_mode->crtc_hsync_start - 1) |
+ ((adjusted_mode->crtc_hsync_end - 1) << 16));
+ REG_WRITE(map->vtotal, (adjusted_mode->crtc_vdisplay - 1) |
+ ((adjusted_mode->crtc_vtotal - 1) << 16));
+ REG_WRITE(map->vblank, (adjusted_mode->crtc_vblank_start - 1) |
+ ((adjusted_mode->crtc_vblank_end - 1) << 16));
+ REG_WRITE(map->vsync, (adjusted_mode->crtc_vsync_start - 1) |
+ ((adjusted_mode->crtc_vsync_end - 1) << 16));
+ /* pipesrc and dspsize control the size that is scaled from,
+ * which should always be the user's requested size.
+ */
+ REG_WRITE(map->size,
+ ((mode->vdisplay - 1) << 16) | (mode->hdisplay - 1));
+ REG_WRITE(map->pos, 0);
+ REG_WRITE(map->src,
+ ((mode->hdisplay - 1) << 16) | (mode->vdisplay - 1));
+ REG_WRITE(map->conf, pipeconf);
+ REG_READ(map->conf);
+
+ gma_wait_for_vblank(dev);
+
+ REG_WRITE(map->cntr, dspcntr);
+
+ /* Flush the plane changes */
+ crtc_funcs->mode_set_base(crtc, x, y, old_fb);
+
+ gma_wait_for_vblank(dev);
+
+ return 0;
+}
+
+/* Returns the clock of the currently programmed mode of the given pipe. */
+static int psb_intel_crtc_clock_get(struct drm_device *dev,
+ struct drm_crtc *crtc)
+{
+ struct gma_crtc *gma_crtc = to_gma_crtc(crtc);
+ struct drm_psb_private *dev_priv = dev->dev_private;
+ int pipe = gma_crtc->pipe;
+ const struct psb_offset *map = &dev_priv->regmap[pipe];
+ u32 dpll;
+ u32 fp;
+ struct gma_clock_t clock;
+ bool is_lvds;
+ struct psb_pipe *p = &dev_priv->regs.pipe[pipe];
+
+ if (gma_power_begin(dev, false)) {
+ dpll = REG_READ(map->dpll);
+ if ((dpll & DISPLAY_RATE_SELECT_FPA1) == 0)
+ fp = REG_READ(map->fp0);
+ else
+ fp = REG_READ(map->fp1);
+ is_lvds = (pipe == 1) && (REG_READ(LVDS) & LVDS_PORT_EN);
+ gma_power_end(dev);
+ } else {
+ dpll = p->dpll;
+
+ if ((dpll & DISPLAY_RATE_SELECT_FPA1) == 0)
+ fp = p->fp0;
+ else
+ fp = p->fp1;
+
+ is_lvds = (pipe == 1) && (dev_priv->regs.psb.saveLVDS &
+ LVDS_PORT_EN);
+ }
+
+ clock.m1 = (fp & FP_M1_DIV_MASK) >> FP_M1_DIV_SHIFT;
+ clock.m2 = (fp & FP_M2_DIV_MASK) >> FP_M2_DIV_SHIFT;
+ clock.n = (fp & FP_N_DIV_MASK) >> FP_N_DIV_SHIFT;
+
+ if (is_lvds) {
+ clock.p1 =
+ ffs((dpll &
+ DPLL_FPA01_P1_POST_DIV_MASK_I830_LVDS) >>
+ DPLL_FPA01_P1_POST_DIV_SHIFT);
+ clock.p2 = 14;
+
+ if ((dpll & PLL_REF_INPUT_MASK) ==
+ PLLB_REF_INPUT_SPREADSPECTRUMIN) {
+ /* XXX: might not be 66MHz */
+ psb_intel_clock(66000, &clock);
+ } else
+ psb_intel_clock(48000, &clock);
+ } else {
+ if (dpll & PLL_P1_DIVIDE_BY_TWO)
+ clock.p1 = 2;
+ else {
+ clock.p1 =
+ ((dpll &
+ DPLL_FPA01_P1_POST_DIV_MASK_I830) >>
+ DPLL_FPA01_P1_POST_DIV_SHIFT) + 2;
+ }
+ if (dpll & PLL_P2_DIVIDE_BY_4)
+ clock.p2 = 4;
+ else
+ clock.p2 = 2;
+
+ psb_intel_clock(48000, &clock);
+ }
+
+ /* XXX: It would be nice to validate the clocks, but we can't reuse
+ * i830PllIsValid() because it relies on the xf86_config connector
+ * configuration being accurate, which it isn't necessarily.
+ */
+
+ return clock.dot;
+}
+
+/** Returns the currently programmed mode of the given pipe. */
+struct drm_display_mode *psb_intel_crtc_mode_get(struct drm_device *dev,
+ struct drm_crtc *crtc)
+{
+ struct gma_crtc *gma_crtc = to_gma_crtc(crtc);
+ int pipe = gma_crtc->pipe;
+ struct drm_display_mode *mode;
+ int htot;
+ int hsync;
+ int vtot;
+ int vsync;
+ struct drm_psb_private *dev_priv = dev->dev_private;
+ struct psb_pipe *p = &dev_priv->regs.pipe[pipe];
+ const struct psb_offset *map = &dev_priv->regmap[pipe];
+
+ if (gma_power_begin(dev, false)) {
+ htot = REG_READ(map->htotal);
+ hsync = REG_READ(map->hsync);
+ vtot = REG_READ(map->vtotal);
+ vsync = REG_READ(map->vsync);
+ gma_power_end(dev);
+ } else {
+ htot = p->htotal;
+ hsync = p->hsync;
+ vtot = p->vtotal;
+ vsync = p->vsync;
+ }
+
+ mode = kzalloc(sizeof(*mode), GFP_KERNEL);
+ if (!mode)
+ return NULL;
+
+ mode->clock = psb_intel_crtc_clock_get(dev, crtc);
+ mode->hdisplay = (htot & 0xffff) + 1;
+ mode->htotal = ((htot & 0xffff0000) >> 16) + 1;
+ mode->hsync_start = (hsync & 0xffff) + 1;
+ mode->hsync_end = ((hsync & 0xffff0000) >> 16) + 1;
+ mode->vdisplay = (vtot & 0xffff) + 1;
+ mode->vtotal = ((vtot & 0xffff0000) >> 16) + 1;
+ mode->vsync_start = (vsync & 0xffff) + 1;
+ mode->vsync_end = ((vsync & 0xffff0000) >> 16) + 1;
+
+ drm_mode_set_name(mode);
+ drm_mode_set_crtcinfo(mode, 0);
+
+ return mode;
+}
+
+const struct drm_crtc_helper_funcs psb_intel_helper_funcs = {
+ .dpms = gma_crtc_dpms,
+ .mode_fixup = gma_crtc_mode_fixup,
+ .mode_set = psb_intel_crtc_mode_set,
+ .mode_set_base = gma_pipe_set_base,
+ .prepare = gma_crtc_prepare,
+ .commit = gma_crtc_commit,
+ .disable = gma_crtc_disable,
+};
+
+const struct drm_crtc_funcs psb_intel_crtc_funcs = {
+ .save = gma_crtc_save,
+ .restore = gma_crtc_restore,
+ .cursor_set = gma_crtc_cursor_set,
+ .cursor_move = gma_crtc_cursor_move,
+ .gamma_set = gma_crtc_gamma_set,
+ .set_config = gma_crtc_set_config,
+ .destroy = gma_crtc_destroy,
+};
+
+const struct gma_clock_funcs psb_clock_funcs = {
+ .clock = psb_intel_clock,
+ .limit = psb_intel_limit,
+ .pll_is_valid = gma_pll_is_valid,
+};
+
+/*
+ * Set the default value of cursor control and base register
+ * to zero. This is a workaround for h/w defect on Oaktrail
+ */
+static void psb_intel_cursor_init(struct drm_device *dev,
+ struct gma_crtc *gma_crtc)
+{
+ struct drm_psb_private *dev_priv = dev->dev_private;
+ u32 control[3] = { CURACNTR, CURBCNTR, CURCCNTR };
+ u32 base[3] = { CURABASE, CURBBASE, CURCBASE };
+ struct gtt_range *cursor_gt;
+
+ if (dev_priv->ops->cursor_needs_phys) {
+ /* Allocate 4 pages of stolen mem for a hardware cursor. That
+ * is enough for the 64 x 64 ARGB cursors we support.
+ */
+ cursor_gt = psb_gtt_alloc_range(dev, 4 * PAGE_SIZE, "cursor", 1,
+ PAGE_SIZE);
+ if (!cursor_gt) {
+ gma_crtc->cursor_gt = NULL;
+ goto out;
+ }
+ gma_crtc->cursor_gt = cursor_gt;
+ gma_crtc->cursor_addr = dev_priv->stolen_base +
+ cursor_gt->offset;
+ } else {
+ gma_crtc->cursor_gt = NULL;
+ }
+
+out:
+ REG_WRITE(control[gma_crtc->pipe], 0);
+ REG_WRITE(base[gma_crtc->pipe], 0);
+}
+
+void psb_intel_crtc_init(struct drm_device *dev, int pipe,
+ struct psb_intel_mode_device *mode_dev)
+{
+ struct drm_psb_private *dev_priv = dev->dev_private;
+ struct gma_crtc *gma_crtc;
+ int i;
+ uint16_t *r_base, *g_base, *b_base;
+
+ /* We allocate a extra array of drm_connector pointers
+ * for fbdev after the crtc */
+ gma_crtc = kzalloc(sizeof(struct gma_crtc) +
+ (INTELFB_CONN_LIMIT * sizeof(struct drm_connector *)),
+ GFP_KERNEL);
+ if (gma_crtc == NULL)
+ return;
+
+ gma_crtc->crtc_state =
+ kzalloc(sizeof(struct psb_intel_crtc_state), GFP_KERNEL);
+ if (!gma_crtc->crtc_state) {
+ dev_err(dev->dev, "Crtc state error: No memory\n");
+ kfree(gma_crtc);
+ return;
+ }
+
+ /* Set the CRTC operations from the chip specific data */
+ drm_crtc_init(dev, &gma_crtc->base, dev_priv->ops->crtc_funcs);
+
+ /* Set the CRTC clock functions from chip specific data */
+ gma_crtc->clock_funcs = dev_priv->ops->clock_funcs;
+
+ drm_mode_crtc_set_gamma_size(&gma_crtc->base, 256);
+ gma_crtc->pipe = pipe;
+ gma_crtc->plane = pipe;
+
+ r_base = gma_crtc->base.gamma_store;
+ g_base = r_base + 256;
+ b_base = g_base + 256;
+ for (i = 0; i < 256; i++) {
+ gma_crtc->lut_r[i] = i;
+ gma_crtc->lut_g[i] = i;
+ gma_crtc->lut_b[i] = i;
+ r_base[i] = i << 8;
+ g_base[i] = i << 8;
+ b_base[i] = i << 8;
+
+ gma_crtc->lut_adj[i] = 0;
+ }
+
+ gma_crtc->mode_dev = mode_dev;
+ gma_crtc->cursor_addr = 0;
+
+ drm_crtc_helper_add(&gma_crtc->base,
+ dev_priv->ops->crtc_helper);
+
+ /* Setup the array of drm_connector pointer array */
+ gma_crtc->mode_set.crtc = &gma_crtc->base;
+ BUG_ON(pipe >= ARRAY_SIZE(dev_priv->plane_to_crtc_mapping) ||
+ dev_priv->plane_to_crtc_mapping[gma_crtc->plane] != NULL);
+ dev_priv->plane_to_crtc_mapping[gma_crtc->plane] = &gma_crtc->base;
+ dev_priv->pipe_to_crtc_mapping[gma_crtc->pipe] = &gma_crtc->base;
+ gma_crtc->mode_set.connectors = (struct drm_connector **)(gma_crtc + 1);
+ gma_crtc->mode_set.num_connectors = 0;
+ psb_intel_cursor_init(dev, gma_crtc);
+
+ /* Set to true so that the pipe is forced off on initial config. */
+ gma_crtc->active = true;
+}
+
+struct drm_crtc *psb_intel_get_crtc_from_pipe(struct drm_device *dev, int pipe)
+{
+ struct drm_crtc *crtc = NULL;
+
+ list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
+ struct gma_crtc *gma_crtc = to_gma_crtc(crtc);
+ if (gma_crtc->pipe == pipe)
+ break;
+ }
+ return crtc;
+}
+
+int gma_connector_clones(struct drm_device *dev, int type_mask)
+{
+ int index_mask = 0;
+ struct drm_connector *connector;
+ int entry = 0;
+
+ list_for_each_entry(connector, &dev->mode_config.connector_list,
+ head) {
+ struct gma_encoder *gma_encoder = gma_attached_encoder(connector);
+ if (type_mask & (1 << gma_encoder->type))
+ index_mask |= (1 << entry);
+ entry++;
+ }
+ return index_mask;
+}
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