1 files changed, 555 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..531c1781a
--- /dev/null
+++ b/drivers/gpu/drm/gma500/psb_intel_display.c
@@ -0,0 +1,555 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright © 2006-2011 Intel Corporation
+ *
+ * Authors:
+ *	Eric Anholt <eric@anholt.net>
+ */
+
+#include <linux/delay.h>
+#include <linux/i2c.h>
+
+#include "framebuffer.h"
+#include "gem.h"
+#include "gma_display.h"
+#include "power.h"
+#include "psb_drv.h"
+#include "psb_intel_drv.h"
+#include "psb_intel_reg.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 = to_drm_psb_private(dev);
+	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_connector_list_iter conn_iter;
+	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;
+	}
+
+	drm_connector_list_iter_begin(dev, &conn_iter);
+	drm_for_each_connector_iter(connector, &conn_iter) {
+		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;
+		}
+
+		break;
+	}
+	drm_connector_list_iter_end(&conn_iter);
+
+	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 = to_drm_psb_private(dev);
+	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 = to_drm_psb_private(dev);
+	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_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 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 = to_drm_psb_private(dev);
+	u32 control[3] = { CURACNTR, CURBCNTR, CURCCNTR };
+	u32 base[3] = { CURABASE, CURBBASE, CURCBASE };
+	struct psb_gem_object *cursor_pobj;
+
+	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_pobj = psb_gem_create(dev, 4 * PAGE_SIZE, "cursor", true, PAGE_SIZE);
+		if (IS_ERR(cursor_pobj)) {
+			gma_crtc->cursor_pobj = NULL;
+			goto out;
+		}
+		gma_crtc->cursor_pobj = cursor_pobj;
+		gma_crtc->cursor_addr = dev_priv->stolen_base + cursor_pobj->offset;
+	} else {
+		gma_crtc->cursor_pobj = 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 = to_drm_psb_private(dev);
+	struct gma_crtc *gma_crtc;
+	int i;
+
+	/* 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;
+	}
+
+	drm_crtc_init(dev, &gma_crtc->base, &gma_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;
+
+	for (i = 0; i < 256; i++)
+		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;
+
+	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)
+			return crtc;
+	}
+	return NULL;
+}
+
+int gma_connector_clones(struct drm_device *dev, int type_mask)
+{
+	struct drm_connector_list_iter conn_iter;
+	struct drm_connector *connector;
+	int index_mask = 0;
+	int entry = 0;
+
+	drm_connector_list_iter_begin(dev, &conn_iter);
+	drm_for_each_connector_iter(connector, &conn_iter) {
+		struct gma_encoder *gma_encoder = gma_attached_encoder(connector);
+		if (type_mask & (1 << gma_encoder->type))
+			index_mask |= (1 << entry);
+		entry++;
+	}
+	drm_connector_list_iter_end(&conn_iter);
+
+	return index_mask;
+}