Adding upstream version 5.10.209.upstream/5.10.209upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 358 insertions, 0 deletions

diff --git a/drivers/gpu/drm/tve200/tve200_display.c b/drivers/gpu/drm/tve200/tve200_display.c
new file mode 100644
index 000000000..17ff24d99
--- /dev/null
+++ b/drivers/gpu/drm/tve200/tve200_display.c
@@ -0,0 +1,358 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2017 Linus Walleij <linus.walleij@linaro.org>
+ * Parts of this file were based on sources as follows:
+ *
+ * Copyright (C) 2006-2008 Intel Corporation
+ * Copyright (C) 2007 Amos Lee <amos_lee@storlinksemi.com>
+ * Copyright (C) 2007 Dave Airlie <airlied@linux.ie>
+ * Copyright (C) 2011 Texas Instruments
+ * Copyright (C) 2017 Eric Anholt
+ */
+
+#include <linux/clk.h>
+#include <linux/version.h>
+#include <linux/dma-buf.h>
+#include <linux/of_graph.h>
+#include <linux/delay.h>
+
+#include <drm/drm_fb_cma_helper.h>
+#include <drm/drm_fourcc.h>
+#include <drm/drm_gem_cma_helper.h>
+#include <drm/drm_gem_framebuffer_helper.h>
+#include <drm/drm_panel.h>
+#include <drm/drm_vblank.h>
+
+#include "tve200_drm.h"
+
+irqreturn_t tve200_irq(int irq, void *data)
+{
+	struct tve200_drm_dev_private *priv = data;
+	u32 stat;
+	u32 val;
+
+	stat = readl(priv->regs + TVE200_INT_STAT);
+
+	if (!stat)
+		return IRQ_NONE;
+
+	/*
+	 * Vblank IRQ
+	 *
+	 * The hardware is a bit tilted: the line stays high after clearing
+	 * the vblank IRQ, firing many more interrupts. We counter this
+	 * by toggling the IRQ back and forth from firing at vblank and
+	 * firing at start of active image, which works around the problem
+	 * since those occur strictly in sequence, and we get two IRQs for each
+	 * frame, one at start of Vblank (that we make call into the CRTC) and
+	 * another one at the start of the image (that we discard).
+	 */
+	if (stat & TVE200_INT_V_STATUS) {
+		val = readl(priv->regs + TVE200_CTRL);
+		/* We have an actual start of vsync */
+		if (!(val & TVE200_VSTSTYPE_BITS)) {
+			drm_crtc_handle_vblank(&priv->pipe.crtc);
+			/* Toggle trigger to start of active image */
+			val |= TVE200_VSTSTYPE_VAI;
+		} else {
+			/* Toggle trigger back to start of vsync */
+			val &= ~TVE200_VSTSTYPE_BITS;
+		}
+		writel(val, priv->regs + TVE200_CTRL);
+	} else
+		dev_err(priv->drm->dev, "stray IRQ %08x\n", stat);
+
+	/* Clear the interrupt once done */
+	writel(stat, priv->regs + TVE200_INT_CLR);
+
+	return IRQ_HANDLED;
+}
+
+static int tve200_display_check(struct drm_simple_display_pipe *pipe,
+			       struct drm_plane_state *pstate,
+			       struct drm_crtc_state *cstate)
+{
+	const struct drm_display_mode *mode = &cstate->mode;
+	struct drm_framebuffer *old_fb = pipe->plane.state->fb;
+	struct drm_framebuffer *fb = pstate->fb;
+
+	/*
+	 * We support these specific resolutions and nothing else.
+	 */
+	if (!(mode->hdisplay == 352 && mode->vdisplay == 240) && /* SIF(525) */
+	    !(mode->hdisplay == 352 && mode->vdisplay == 288) && /* CIF(625) */
+	    !(mode->hdisplay == 640 && mode->vdisplay == 480) && /* VGA */
+	    !(mode->hdisplay == 720 && mode->vdisplay == 480) && /* D1 */
+	    !(mode->hdisplay == 720 && mode->vdisplay == 576)) { /* D1 */
+		DRM_DEBUG_KMS("unsupported display mode (%u x %u)\n",
+			mode->hdisplay, mode->vdisplay);
+		return -EINVAL;
+	}
+
+	if (fb) {
+		u32 offset = drm_fb_cma_get_gem_addr(fb, pstate, 0);
+
+		/* FB base address must be dword aligned. */
+		if (offset & 3) {
+			DRM_DEBUG_KMS("FB not 32-bit aligned\n");
+			return -EINVAL;
+		}
+
+		/*
+		 * There's no pitch register, the mode's hdisplay
+		 * controls this.
+		 */
+		if (fb->pitches[0] != mode->hdisplay * fb->format->cpp[0]) {
+			DRM_DEBUG_KMS("can't handle pitches\n");
+			return -EINVAL;
+		}
+
+		/*
+		 * We can't change the FB format in a flicker-free
+		 * manner (and only update it during CRTC enable).
+		 */
+		if (old_fb && old_fb->format != fb->format)
+			cstate->mode_changed = true;
+	}
+
+	return 0;
+}
+
+static void tve200_display_enable(struct drm_simple_display_pipe *pipe,
+				 struct drm_crtc_state *cstate,
+				 struct drm_plane_state *plane_state)
+{
+	struct drm_crtc *crtc = &pipe->crtc;
+	struct drm_plane *plane = &pipe->plane;
+	struct drm_device *drm = crtc->dev;
+	struct tve200_drm_dev_private *priv = drm->dev_private;
+	const struct drm_display_mode *mode = &cstate->mode;
+	struct drm_framebuffer *fb = plane->state->fb;
+	struct drm_connector *connector = priv->connector;
+	u32 format = fb->format->format;
+	u32 ctrl1 = 0;
+	int retries;
+
+	clk_prepare_enable(priv->clk);
+
+	/* Reset the TVE200 and wait for it to come back online */
+	writel(TVE200_CTRL_4_RESET, priv->regs + TVE200_CTRL_4);
+	for (retries = 0; retries < 5; retries++) {
+		usleep_range(30000, 50000);
+		if (readl(priv->regs + TVE200_CTRL_4) & TVE200_CTRL_4_RESET)
+			continue;
+		else
+			break;
+	}
+	if (retries == 5 &&
+	    readl(priv->regs + TVE200_CTRL_4) & TVE200_CTRL_4_RESET) {
+		dev_err(drm->dev, "can't get hardware out of reset\n");
+		return;
+	}
+
+	/* Function 1 */
+	ctrl1 |= TVE200_CTRL_CSMODE;
+	/* Interlace mode for CCIR656: parameterize? */
+	ctrl1 |= TVE200_CTRL_NONINTERLACE;
+	/* 32 words per burst */
+	ctrl1 |= TVE200_CTRL_BURST_32_WORDS;
+	/* 16 retries */
+	ctrl1 |= TVE200_CTRL_RETRYCNT_16;
+	/* NTSC mode: parametrize? */
+	ctrl1 |= TVE200_CTRL_NTSC;
+
+	/* Vsync IRQ at start of Vsync at first */
+	ctrl1 |= TVE200_VSTSTYPE_VSYNC;
+
+	if (connector->display_info.bus_flags &
+	    DRM_BUS_FLAG_PIXDATA_DRIVE_NEGEDGE)
+		ctrl1 |= TVE200_CTRL_TVCLKP;
+
+	if ((mode->hdisplay == 352 && mode->vdisplay == 240) || /* SIF(525) */
+	    (mode->hdisplay == 352 && mode->vdisplay == 288)) { /* CIF(625) */
+		ctrl1 |= TVE200_CTRL_IPRESOL_CIF;
+		dev_info(drm->dev, "CIF mode\n");
+	} else if (mode->hdisplay == 640 && mode->vdisplay == 480) {
+		ctrl1 |= TVE200_CTRL_IPRESOL_VGA;
+		dev_info(drm->dev, "VGA mode\n");
+	} else if ((mode->hdisplay == 720 && mode->vdisplay == 480) ||
+		   (mode->hdisplay == 720 && mode->vdisplay == 576)) {
+		ctrl1 |= TVE200_CTRL_IPRESOL_D1;
+		dev_info(drm->dev, "D1 mode\n");
+	}
+
+	if (format & DRM_FORMAT_BIG_ENDIAN) {
+		ctrl1 |= TVE200_CTRL_BBBP;
+		format &= ~DRM_FORMAT_BIG_ENDIAN;
+	}
+
+	switch (format) {
+	case DRM_FORMAT_XRGB8888:
+		ctrl1 |= TVE200_IPDMOD_RGB888;
+		break;
+	case DRM_FORMAT_RGB565:
+		ctrl1 |= TVE200_IPDMOD_RGB565;
+		break;
+	case DRM_FORMAT_XRGB1555:
+		ctrl1 |= TVE200_IPDMOD_RGB555;
+		break;
+	case DRM_FORMAT_XBGR8888:
+		ctrl1 |= TVE200_IPDMOD_RGB888 | TVE200_BGR;
+		break;
+	case DRM_FORMAT_BGR565:
+		ctrl1 |= TVE200_IPDMOD_RGB565 | TVE200_BGR;
+		break;
+	case DRM_FORMAT_XBGR1555:
+		ctrl1 |= TVE200_IPDMOD_RGB555 | TVE200_BGR;
+		break;
+	case DRM_FORMAT_YUYV:
+		ctrl1 |= TVE200_IPDMOD_YUV422;
+		ctrl1 |= TVE200_CTRL_YCBCRODR_CR0Y1CB0Y0;
+		break;
+	case DRM_FORMAT_YVYU:
+		ctrl1 |= TVE200_IPDMOD_YUV422;
+		ctrl1 |= TVE200_CTRL_YCBCRODR_CB0Y1CR0Y0;
+		break;
+	case DRM_FORMAT_UYVY:
+		ctrl1 |= TVE200_IPDMOD_YUV422;
+		ctrl1 |= TVE200_CTRL_YCBCRODR_Y1CR0Y0CB0;
+		break;
+	case DRM_FORMAT_VYUY:
+		ctrl1 |= TVE200_IPDMOD_YUV422;
+		ctrl1 |= TVE200_CTRL_YCBCRODR_Y1CB0Y0CR0;
+		break;
+	case DRM_FORMAT_YUV420:
+		ctrl1 |= TVE200_CTRL_YUV420;
+		ctrl1 |= TVE200_IPDMOD_YUV420;
+		break;
+	default:
+		dev_err(drm->dev, "Unknown FB format 0x%08x\n",
+			fb->format->format);
+		break;
+	}
+
+	ctrl1 |= TVE200_TVEEN;
+
+	/* Turn it on */
+	writel(ctrl1, priv->regs + TVE200_CTRL);
+
+	drm_crtc_vblank_on(crtc);
+}
+
+static void tve200_display_disable(struct drm_simple_display_pipe *pipe)
+{
+	struct drm_crtc *crtc = &pipe->crtc;
+	struct drm_device *drm = crtc->dev;
+	struct tve200_drm_dev_private *priv = drm->dev_private;
+
+	drm_crtc_vblank_off(crtc);
+
+	/* Disable put into reset and Power Down */
+	writel(0, priv->regs + TVE200_CTRL);
+	writel(TVE200_CTRL_4_RESET, priv->regs + TVE200_CTRL_4);
+
+	clk_disable_unprepare(priv->clk);
+}
+
+static void tve200_display_update(struct drm_simple_display_pipe *pipe,
+				 struct drm_plane_state *old_pstate)
+{
+	struct drm_crtc *crtc = &pipe->crtc;
+	struct drm_device *drm = crtc->dev;
+	struct tve200_drm_dev_private *priv = drm->dev_private;
+	struct drm_pending_vblank_event *event = crtc->state->event;
+	struct drm_plane *plane = &pipe->plane;
+	struct drm_plane_state *pstate = plane->state;
+	struct drm_framebuffer *fb = pstate->fb;
+
+	if (fb) {
+		/* For RGB, the Y component is used as base address */
+		writel(drm_fb_cma_get_gem_addr(fb, pstate, 0),
+		       priv->regs + TVE200_Y_FRAME_BASE_ADDR);
+
+		/* For three plane YUV we need two more addresses */
+		if (fb->format->format == DRM_FORMAT_YUV420) {
+			writel(drm_fb_cma_get_gem_addr(fb, pstate, 1),
+			       priv->regs + TVE200_U_FRAME_BASE_ADDR);
+			writel(drm_fb_cma_get_gem_addr(fb, pstate, 2),
+			       priv->regs + TVE200_V_FRAME_BASE_ADDR);
+		}
+	}
+
+	if (event) {
+		crtc->state->event = NULL;
+
+		spin_lock_irq(&crtc->dev->event_lock);
+		if (crtc->state->active && drm_crtc_vblank_get(crtc) == 0)
+			drm_crtc_arm_vblank_event(crtc, event);
+		else
+			drm_crtc_send_vblank_event(crtc, event);
+		spin_unlock_irq(&crtc->dev->event_lock);
+	}
+}
+
+static int tve200_display_enable_vblank(struct drm_simple_display_pipe *pipe)
+{
+	struct drm_crtc *crtc = &pipe->crtc;
+	struct drm_device *drm = crtc->dev;
+	struct tve200_drm_dev_private *priv = drm->dev_private;
+
+	/* Clear any IRQs and enable */
+	writel(0xFF, priv->regs + TVE200_INT_CLR);
+	writel(TVE200_INT_V_STATUS, priv->regs + TVE200_INT_EN);
+	return 0;
+}
+
+static void tve200_display_disable_vblank(struct drm_simple_display_pipe *pipe)
+{
+	struct drm_crtc *crtc = &pipe->crtc;
+	struct drm_device *drm = crtc->dev;
+	struct tve200_drm_dev_private *priv = drm->dev_private;
+
+	writel(0, priv->regs + TVE200_INT_EN);
+}
+
+static const struct drm_simple_display_pipe_funcs tve200_display_funcs = {
+	.check = tve200_display_check,
+	.enable = tve200_display_enable,
+	.disable = tve200_display_disable,
+	.update = tve200_display_update,
+	.prepare_fb = drm_gem_fb_simple_display_pipe_prepare_fb,
+	.enable_vblank = tve200_display_enable_vblank,
+	.disable_vblank = tve200_display_disable_vblank,
+};
+
+int tve200_display_init(struct drm_device *drm)
+{
+	struct tve200_drm_dev_private *priv = drm->dev_private;
+	int ret;
+	static const u32 formats[] = {
+		DRM_FORMAT_XRGB8888,
+		DRM_FORMAT_XBGR8888,
+		DRM_FORMAT_RGB565,
+		DRM_FORMAT_BGR565,
+		DRM_FORMAT_XRGB1555,
+		DRM_FORMAT_XBGR1555,
+		/*
+		 * The controller actually supports any YCbCr ordering,
+		 * for packed YCbCr. This just lists the orderings that
+		 * DRM supports.
+		 */
+		DRM_FORMAT_YUYV,
+		DRM_FORMAT_YVYU,
+		DRM_FORMAT_UYVY,
+		DRM_FORMAT_VYUY,
+		/* This uses three planes */
+		DRM_FORMAT_YUV420,
+	};
+
+	ret = drm_simple_display_pipe_init(drm, &priv->pipe,
+					   &tve200_display_funcs,
+					   formats, ARRAY_SIZE(formats),
+					   NULL,
+					   priv->connector);
+	if (ret)
+		return ret;
+
+	return 0;
+}