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-rw-r--r--Documentation/devicetree/bindings/drm/tilcdc/tfp410.txt21
-rw-r--r--Documentation/devicetree/bindings/drm/tilcdc/tilcdc.txt21
-rw-r--r--drivers/gpu/drm/Kconfig2
-rw-r--r--drivers/gpu/drm/Makefile1
-rw-r--r--drivers/gpu/drm/tilcdc/Kconfig10
-rw-r--r--drivers/gpu/drm/tilcdc/Makefile8
-rw-r--r--drivers/gpu/drm/tilcdc/tilcdc_crtc.c602
-rw-r--r--drivers/gpu/drm/tilcdc/tilcdc_drv.c605
-rw-r--r--drivers/gpu/drm/tilcdc/tilcdc_drv.h150
-rw-r--r--drivers/gpu/drm/tilcdc/tilcdc_regs.h154
-rw-r--r--drivers/gpu/drm/tilcdc/tilcdc_tfp410.c419
-rw-r--r--drivers/gpu/drm/tilcdc/tilcdc_tfp410.h26
12 files changed, 2019 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/drm/tilcdc/tfp410.txt b/Documentation/devicetree/bindings/drm/tilcdc/tfp410.txt
new file mode 100644
index 00000000000..a58ae7756fc
--- /dev/null
+++ b/Documentation/devicetree/bindings/drm/tilcdc/tfp410.txt
@@ -0,0 +1,21 @@
+Device-Tree bindings for tilcdc DRM TFP410 output driver
+
+Required properties:
+ - compatible: value should be "ti,tilcdc,tfp410".
+ - i2c: the phandle for the i2c device to use for DDC
+
+Recommended properties:
+ - pinctrl-names, pinctrl-0: the pincontrol settings to configure
+ muxing properly for pins that connect to TFP410 device
+ - powerdn-gpio: the powerdown GPIO, pulled low to power down the
+ TFP410 device (for DPMS_OFF)
+
+Example:
+
+ dvicape {
+ compatible = "ti,tilcdc,tfp410";
+ i2c = <&i2c2>;
+ pinctrl-names = "default";
+ pinctrl-0 = <&bone_dvi_cape_dvi_00A1_pins>;
+ powerdn-gpio = <&gpio2 31 0>;
+ };
diff --git a/Documentation/devicetree/bindings/drm/tilcdc/tilcdc.txt b/Documentation/devicetree/bindings/drm/tilcdc/tilcdc.txt
new file mode 100644
index 00000000000..e5f130159ae
--- /dev/null
+++ b/Documentation/devicetree/bindings/drm/tilcdc/tilcdc.txt
@@ -0,0 +1,21 @@
+Device-Tree bindings for tilcdc DRM driver
+
+Required properties:
+ - compatible: value should be "ti,am33xx-tilcdc".
+ - interrupts: the interrupt number
+ - reg: base address and size of the LCDC device
+
+Recommended properties:
+ - interrupt-parent: the phandle for the interrupt controller that
+ services interrupts for this device.
+ - ti,hwmods: Name of the hwmod associated to the LCDC
+
+Example:
+
+ fb: fb@4830e000 {
+ compatible = "ti,am33xx-tilcdc";
+ reg = <0x4830e000 0x1000>;
+ interrupt-parent = <&intc>;
+ interrupts = <36>;
+ ti,hwmods = "lcdc";
+ };
diff --git a/drivers/gpu/drm/Kconfig b/drivers/gpu/drm/Kconfig
index ed9e3af17b3..ba74e75f7d5 100644
--- a/drivers/gpu/drm/Kconfig
+++ b/drivers/gpu/drm/Kconfig
@@ -215,3 +215,5 @@ source "drivers/gpu/drm/cirrus/Kconfig"
source "drivers/gpu/drm/shmobile/Kconfig"
source "drivers/gpu/drm/tegra/Kconfig"
+
+source "drivers/gpu/drm/tilcdc/Kconfig"
diff --git a/drivers/gpu/drm/Makefile b/drivers/gpu/drm/Makefile
index 6f58c81cfcb..3af934dffe6 100644
--- a/drivers/gpu/drm/Makefile
+++ b/drivers/gpu/drm/Makefile
@@ -50,4 +50,5 @@ obj-$(CONFIG_DRM_UDL) += udl/
obj-$(CONFIG_DRM_AST) += ast/
obj-$(CONFIG_DRM_SHMOBILE) +=shmobile/
obj-$(CONFIG_DRM_TEGRA) += tegra/
+obj-$(CONFIG_DRM_TILCDC) += tilcdc/
obj-y += i2c/
diff --git a/drivers/gpu/drm/tilcdc/Kconfig b/drivers/gpu/drm/tilcdc/Kconfig
new file mode 100644
index 00000000000..ee9b592d59e
--- /dev/null
+++ b/drivers/gpu/drm/tilcdc/Kconfig
@@ -0,0 +1,10 @@
+config DRM_TILCDC
+ tristate "DRM Support for TI LCDC Display Controller"
+ depends on DRM && OF
+ select DRM_KMS_HELPER
+ select DRM_KMS_CMA_HELPER
+ select DRM_GEM_CMA_HELPER
+ help
+ Choose this option if you have an TI SoC with LCDC display
+ controller, for example AM33xx in beagle-bone, DA8xx, or
+ OMAP-L1xx. This driver replaces the FB_DA8XX fbdev driver.
diff --git a/drivers/gpu/drm/tilcdc/Makefile b/drivers/gpu/drm/tilcdc/Makefile
new file mode 100644
index 00000000000..1359cc29cd8
--- /dev/null
+++ b/drivers/gpu/drm/tilcdc/Makefile
@@ -0,0 +1,8 @@
+ccflags-y := -Iinclude/drm -Werror
+
+tilcdc-y := \
+ tilcdc_crtc.o \
+ tilcdc_tfp410.o \
+ tilcdc_drv.o
+
+obj-$(CONFIG_DRM_TILCDC) += tilcdc.o
diff --git a/drivers/gpu/drm/tilcdc/tilcdc_crtc.c b/drivers/gpu/drm/tilcdc/tilcdc_crtc.c
new file mode 100644
index 00000000000..5dd3c7d031d
--- /dev/null
+++ b/drivers/gpu/drm/tilcdc/tilcdc_crtc.c
@@ -0,0 +1,602 @@
+/*
+ * Copyright (C) 2012 Texas Instruments
+ * Author: Rob Clark <robdclark@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published by
+ * the Free Software Foundation.
+ *
+ * This program is distributed in the hope that 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, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <linux/kfifo.h>
+
+#include "tilcdc_drv.h"
+#include "tilcdc_regs.h"
+
+struct tilcdc_crtc {
+ struct drm_crtc base;
+
+ const struct tilcdc_panel_info *info;
+ uint32_t dirty;
+ dma_addr_t start, end;
+ struct drm_pending_vblank_event *event;
+ int dpms;
+ wait_queue_head_t frame_done_wq;
+ bool frame_done;
+
+ /* fb currently set to scanout 0/1: */
+ struct drm_framebuffer *scanout[2];
+
+ /* for deferred fb unref's: */
+ DECLARE_KFIFO_PTR(unref_fifo, struct drm_framebuffer *);
+ struct work_struct work;
+};
+#define to_tilcdc_crtc(x) container_of(x, struct tilcdc_crtc, base)
+
+static void unref_worker(struct work_struct *work)
+{
+ struct tilcdc_crtc *tilcdc_crtc = container_of(work, struct tilcdc_crtc, work);
+ struct drm_device *dev = tilcdc_crtc->base.dev;
+ struct drm_framebuffer *fb;
+
+ mutex_lock(&dev->mode_config.mutex);
+ while (kfifo_get(&tilcdc_crtc->unref_fifo, &fb))
+ drm_framebuffer_unreference(fb);
+ mutex_unlock(&dev->mode_config.mutex);
+}
+
+static void set_scanout(struct drm_crtc *crtc, int n)
+{
+ static const uint32_t base_reg[] = {
+ LCDC_DMA_FB_BASE_ADDR_0_REG, LCDC_DMA_FB_BASE_ADDR_1_REG,
+ };
+ static const uint32_t ceil_reg[] = {
+ LCDC_DMA_FB_CEILING_ADDR_0_REG, LCDC_DMA_FB_CEILING_ADDR_1_REG,
+ };
+ static const uint32_t stat[] = {
+ LCDC_END_OF_FRAME0, LCDC_END_OF_FRAME1,
+ };
+ struct tilcdc_crtc *tilcdc_crtc = to_tilcdc_crtc(crtc);
+ struct drm_device *dev = crtc->dev;
+
+ pm_runtime_get_sync(dev->dev);
+ tilcdc_write(dev, base_reg[n], tilcdc_crtc->start);
+ tilcdc_write(dev, ceil_reg[n], tilcdc_crtc->end);
+ if (tilcdc_crtc->scanout[n]) {
+ if (kfifo_put(&tilcdc_crtc->unref_fifo,
+ (const struct drm_framebuffer **)&tilcdc_crtc->scanout[n])) {
+ struct tilcdc_drm_private *priv = dev->dev_private;
+ queue_work(priv->wq, &tilcdc_crtc->work);
+ } else {
+ dev_err(dev->dev, "unref fifo full!\n");
+ drm_framebuffer_unreference(tilcdc_crtc->scanout[n]);
+ }
+ }
+ tilcdc_crtc->scanout[n] = crtc->fb;
+ drm_framebuffer_reference(tilcdc_crtc->scanout[n]);
+ tilcdc_crtc->dirty &= ~stat[n];
+ pm_runtime_put_sync(dev->dev);
+}
+
+static void update_scanout(struct drm_crtc *crtc)
+{
+ struct tilcdc_crtc *tilcdc_crtc = to_tilcdc_crtc(crtc);
+ struct drm_device *dev = crtc->dev;
+ struct drm_framebuffer *fb = crtc->fb;
+ struct drm_gem_cma_object *gem;
+ unsigned int depth, bpp;
+
+ drm_fb_get_bpp_depth(fb->pixel_format, &depth, &bpp);
+ gem = drm_fb_cma_get_gem_obj(fb, 0);
+
+ tilcdc_crtc->start = gem->paddr + fb->offsets[0] +
+ (crtc->y * fb->pitches[0]) + (crtc->x * bpp/8);
+
+ tilcdc_crtc->end = tilcdc_crtc->start +
+ (crtc->mode.vdisplay * fb->pitches[0]);
+
+ if (tilcdc_crtc->dpms == DRM_MODE_DPMS_ON) {
+ /* already enabled, so just mark the frames that need
+ * updating and they will be updated on vblank:
+ */
+ tilcdc_crtc->dirty |= LCDC_END_OF_FRAME0 | LCDC_END_OF_FRAME1;
+ drm_vblank_get(dev, 0);
+ } else {
+ /* not enabled yet, so update registers immediately: */
+ set_scanout(crtc, 0);
+ set_scanout(crtc, 1);
+ }
+}
+
+static void start(struct drm_crtc *crtc)
+{
+ struct drm_device *dev = crtc->dev;
+ struct tilcdc_drm_private *priv = dev->dev_private;
+
+ if (priv->rev == 2) {
+ tilcdc_set(dev, LCDC_CLK_RESET_REG, LCDC_CLK_MAIN_RESET);
+ msleep(1);
+ tilcdc_clear(dev, LCDC_CLK_RESET_REG, LCDC_CLK_MAIN_RESET);
+ msleep(1);
+ }
+
+ tilcdc_set(dev, LCDC_DMA_CTRL_REG, LCDC_DUAL_FRAME_BUFFER_ENABLE);
+ tilcdc_set(dev, LCDC_RASTER_CTRL_REG, LCDC_PALETTE_LOAD_MODE(DATA_ONLY));
+ tilcdc_set(dev, LCDC_RASTER_CTRL_REG, LCDC_RASTER_ENABLE);
+}
+
+static void stop(struct drm_crtc *crtc)
+{
+ struct drm_device *dev = crtc->dev;
+
+ tilcdc_clear(dev, LCDC_RASTER_CTRL_REG, LCDC_RASTER_ENABLE);
+}
+
+static void tilcdc_crtc_destroy(struct drm_crtc *crtc)
+{
+ struct tilcdc_crtc *tilcdc_crtc = to_tilcdc_crtc(crtc);
+
+ WARN_ON(tilcdc_crtc->dpms == DRM_MODE_DPMS_ON);
+
+ drm_crtc_cleanup(crtc);
+ WARN_ON(!kfifo_is_empty(&tilcdc_crtc->unref_fifo));
+ kfifo_free(&tilcdc_crtc->unref_fifo);
+ kfree(tilcdc_crtc);
+}
+
+static int tilcdc_crtc_page_flip(struct drm_crtc *crtc,
+ struct drm_framebuffer *fb,
+ struct drm_pending_vblank_event *event)
+{
+ struct tilcdc_crtc *tilcdc_crtc = to_tilcdc_crtc(crtc);
+ struct drm_device *dev = crtc->dev;
+
+ if (tilcdc_crtc->event) {
+ dev_err(dev->dev, "already pending page flip!\n");
+ return -EBUSY;
+ }
+
+ crtc->fb = fb;
+ tilcdc_crtc->event = event;
+ update_scanout(crtc);
+
+ return 0;
+}
+
+static void tilcdc_crtc_dpms(struct drm_crtc *crtc, int mode)
+{
+ struct tilcdc_crtc *tilcdc_crtc = to_tilcdc_crtc(crtc);
+ struct drm_device *dev = crtc->dev;
+ struct tilcdc_drm_private *priv = dev->dev_private;
+
+ /* we really only care about on or off: */
+ if (mode != DRM_MODE_DPMS_ON)
+ mode = DRM_MODE_DPMS_OFF;
+
+ if (tilcdc_crtc->dpms == mode)
+ return;
+
+ tilcdc_crtc->dpms = mode;
+
+ pm_runtime_get_sync(dev->dev);
+
+ if (mode == DRM_MODE_DPMS_ON) {
+ pm_runtime_forbid(dev->dev);
+ start(crtc);
+ } else {
+ tilcdc_crtc->frame_done = false;
+ stop(crtc);
+
+ /* if necessary wait for framedone irq which will still come
+ * before putting things to sleep..
+ */
+ if (priv->rev == 2) {
+ int ret = wait_event_timeout(
+ tilcdc_crtc->frame_done_wq,
+ tilcdc_crtc->frame_done,
+ msecs_to_jiffies(50));
+ if (ret == 0)
+ dev_err(dev->dev, "timeout waiting for framedone\n");
+ }
+ pm_runtime_allow(dev->dev);
+ }
+
+ pm_runtime_put_sync(dev->dev);
+}
+
+static bool tilcdc_crtc_mode_fixup(struct drm_crtc *crtc,
+ const struct drm_display_mode *mode,
+ struct drm_display_mode *adjusted_mode)
+{
+ return true;
+}
+
+static void tilcdc_crtc_prepare(struct drm_crtc *crtc)
+{
+ tilcdc_crtc_dpms(crtc, DRM_MODE_DPMS_OFF);
+}
+
+static void tilcdc_crtc_commit(struct drm_crtc *crtc)
+{
+ tilcdc_crtc_dpms(crtc, DRM_MODE_DPMS_ON);
+}
+
+static int tilcdc_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 tilcdc_crtc *tilcdc_crtc = to_tilcdc_crtc(crtc);
+ struct drm_device *dev = crtc->dev;
+ struct tilcdc_drm_private *priv = dev->dev_private;
+ const struct tilcdc_panel_info *info = tilcdc_crtc->info;
+ uint32_t reg, hbp, hfp, hsw, vbp, vfp, vsw;
+ int ret;
+
+ ret = tilcdc_crtc_mode_valid(crtc, mode);
+ if (WARN_ON(ret))
+ return ret;
+
+ if (WARN_ON(!info))
+ return -EINVAL;
+
+ pm_runtime_get_sync(dev->dev);
+
+ /* Configure the Burst Size and fifo threshold of DMA: */
+ reg = tilcdc_read(dev, LCDC_DMA_CTRL_REG) & ~0x00000770;
+ switch (info->dma_burst_sz) {
+ case 1:
+ reg |= LCDC_DMA_BURST_SIZE(LCDC_DMA_BURST_1);
+ break;
+ case 2:
+ reg |= LCDC_DMA_BURST_SIZE(LCDC_DMA_BURST_2);
+ break;
+ case 4:
+ reg |= LCDC_DMA_BURST_SIZE(LCDC_DMA_BURST_4);
+ break;
+ case 8:
+ reg |= LCDC_DMA_BURST_SIZE(LCDC_DMA_BURST_8);
+ break;
+ case 16:
+ reg |= LCDC_DMA_BURST_SIZE(LCDC_DMA_BURST_16);
+ break;
+ default:
+ return -EINVAL;
+ }
+ reg |= (info->fifo_th << 8);
+ tilcdc_write(dev, LCDC_DMA_CTRL_REG, reg);
+
+ /* Configure timings: */
+ hbp = mode->htotal - mode->hsync_end;
+ hfp = mode->hsync_start - mode->hdisplay;
+ hsw = mode->hsync_end - mode->hsync_start;
+ vbp = mode->vtotal - mode->vsync_end;
+ vfp = mode->vsync_start - mode->vdisplay;
+ vsw = mode->vsync_end - mode->vsync_start;
+
+ DBG("%dx%d, hbp=%u, hfp=%u, hsw=%u, vbp=%u, vfp=%u, vsw=%u",
+ mode->hdisplay, mode->vdisplay, hbp, hfp, hsw, vbp, vfp, vsw);
+
+ /* Configure the AC Bias Period and Number of Transitions per Interrupt: */
+ reg = tilcdc_read(dev, LCDC_RASTER_TIMING_2_REG) & ~0x000fff00;
+ reg |= LCDC_AC_BIAS_FREQUENCY(info->ac_bias) |
+ LCDC_AC_BIAS_TRANSITIONS_PER_INT(info->ac_bias_intrpt);
+ if (priv->rev == 2) {
+ reg |= (hfp & 0x300) >> 8;
+ reg |= (hbp & 0x300) >> 4;
+ reg |= (hsw & 0x3c0) << 21;
+ }
+ tilcdc_write(dev, LCDC_RASTER_TIMING_2_REG, reg);
+
+ reg = (((mode->hdisplay >> 4) - 1) << 4) |
+ ((hbp & 0xff) << 24) |
+ ((hfp & 0xff) << 16) |
+ ((hsw & 0x3f) << 10);
+ if (priv->rev == 2)
+ reg |= (((mode->hdisplay >> 4) - 1) & 0x40) >> 3;
+ tilcdc_write(dev, LCDC_RASTER_TIMING_0_REG, reg);
+
+ reg = ((mode->vdisplay - 1) & 0x3ff) |
+ ((vbp & 0xff) << 24) |
+ ((vfp & 0xff) << 16) |
+ ((vsw & 0x3f) << 10);
+ tilcdc_write(dev, LCDC_RASTER_TIMING_1_REG, reg);
+
+ /* Configure display type: */
+ reg = tilcdc_read(dev, LCDC_RASTER_CTRL_REG) &
+ ~(LCDC_TFT_MODE | LCDC_MONO_8BIT_MODE | LCDC_MONOCHROME_MODE |
+ LCDC_V2_TFT_24BPP_MODE | LCDC_V2_TFT_24BPP_UNPACK | 0x000ff000);
+ reg |= LCDC_TFT_MODE; /* no monochrome/passive support */
+ if (info->tft_alt_mode)
+ reg |= LCDC_TFT_ALT_ENABLE;
+ if (priv->rev == 2) {
+ unsigned int depth, bpp;
+
+ drm_fb_get_bpp_depth(crtc->fb->pixel_format, &depth, &bpp);
+ switch (bpp) {
+ case 16:
+ break;
+ case 32:
+ reg |= LCDC_V2_TFT_24BPP_UNPACK;
+ /* fallthrough */
+ case 24:
+ reg |= LCDC_V2_TFT_24BPP_MODE;
+ break;
+ default:
+ dev_err(dev->dev, "invalid pixel format\n");
+ return -EINVAL;
+ }
+ }
+ reg |= info->fdd < 12;
+ tilcdc_write(dev, LCDC_RASTER_CTRL_REG, reg);
+
+ if (info->invert_pxl_clk)
+ tilcdc_set(dev, LCDC_RASTER_TIMING_2_REG, LCDC_INVERT_PIXEL_CLOCK);
+ else
+ tilcdc_clear(dev, LCDC_RASTER_TIMING_2_REG, LCDC_INVERT_PIXEL_CLOCK);
+
+ if (info->sync_ctrl)
+ tilcdc_set(dev, LCDC_RASTER_TIMING_2_REG, LCDC_SYNC_CTRL);
+ else
+ tilcdc_clear(dev, LCDC_RASTER_TIMING_2_REG, LCDC_SYNC_CTRL);
+
+ if (info->sync_edge)
+ tilcdc_set(dev, LCDC_RASTER_TIMING_2_REG, LCDC_SYNC_EDGE);
+ else
+ tilcdc_clear(dev, LCDC_RASTER_TIMING_2_REG, LCDC_SYNC_EDGE);
+
+ if (mode->flags & DRM_MODE_FLAG_NHSYNC)
+ tilcdc_set(dev, LCDC_RASTER_TIMING_2_REG, LCDC_INVERT_HSYNC);
+ else
+ tilcdc_clear(dev, LCDC_RASTER_TIMING_2_REG, LCDC_INVERT_HSYNC);
+
+ if (mode->flags & DRM_MODE_FLAG_NVSYNC)
+ tilcdc_set(dev, LCDC_RASTER_TIMING_2_REG, LCDC_INVERT_VSYNC);
+ else
+ tilcdc_clear(dev, LCDC_RASTER_TIMING_2_REG, LCDC_INVERT_VSYNC);
+
+ if (info->raster_order)
+ tilcdc_set(dev, LCDC_RASTER_CTRL_REG, LCDC_RASTER_ORDER);
+ else
+ tilcdc_clear(dev, LCDC_RASTER_CTRL_REG, LCDC_RASTER_ORDER);
+
+
+ update_scanout(crtc);
+ tilcdc_crtc_update_clk(crtc);
+
+ pm_runtime_put_sync(dev->dev);
+
+ return 0;
+}
+
+static int tilcdc_crtc_mode_set_base(struct drm_crtc *crtc, int x, int y,
+ struct drm_framebuffer *old_fb)
+{
+ update_scanout(crtc);
+ return 0;
+}
+
+static void tilcdc_crtc_load_lut(struct drm_crtc *crtc)
+{
+}
+
+static const struct drm_crtc_funcs tilcdc_crtc_funcs = {
+ .destroy = tilcdc_crtc_destroy,
+ .set_config = drm_crtc_helper_set_config,
+ .page_flip = tilcdc_crtc_page_flip,
+};
+
+static const struct drm_crtc_helper_funcs tilcdc_crtc_helper_funcs = {
+ .dpms = tilcdc_crtc_dpms,
+ .mode_fixup = tilcdc_crtc_mode_fixup,
+ .prepare = tilcdc_crtc_prepare,
+ .commit = tilcdc_crtc_commit,
+ .mode_set = tilcdc_crtc_mode_set,
+ .mode_set_base = tilcdc_crtc_mode_set_base,
+ .load_lut = tilcdc_crtc_load_lut,
+};
+
+int tilcdc_crtc_max_width(struct drm_crtc *crtc)
+{
+ struct drm_device *dev = crtc->dev;
+ struct tilcdc_drm_private *priv = dev->dev_private;
+ int max_width = 0;
+
+ if (priv->rev == 1)
+ max_width = 1024;
+ else if (priv->rev == 2)
+ max_width = 2048;
+
+ return max_width;
+}
+
+int tilcdc_crtc_mode_valid(struct drm_crtc *crtc, struct drm_display_mode *mode)
+{
+ struct tilcdc_drm_private *priv = crtc->dev->dev_private;
+ unsigned int bandwidth;
+
+ if (mode->hdisplay > tilcdc_crtc_max_width(crtc))
+ return MODE_VIRTUAL_X;
+
+ /* width must be multiple of 16 */
+ if (mode->hdisplay & 0xf)
+ return MODE_VIRTUAL_X;
+
+ if (mode->vdisplay > 2048)
+ return MODE_VIRTUAL_Y;
+
+ /* filter out modes that would require too much memory bandwidth: */
+ bandwidth = mode->hdisplay * mode->vdisplay * drm_mode_vrefresh(mode);
+ if (bandwidth > priv->max_bandwidth)
+ return MODE_BAD;
+
+ return MODE_OK;
+}
+
+void tilcdc_crtc_set_panel_info(struct drm_crtc *crtc,
+ const struct tilcdc_panel_info *info)
+{
+ struct tilcdc_crtc *tilcdc_crtc = to_tilcdc_crtc(crtc);
+ tilcdc_crtc->info = info;
+}
+
+void tilcdc_crtc_update_clk(struct drm_crtc *crtc)
+{
+ struct tilcdc_crtc *tilcdc_crtc = to_tilcdc_crtc(crtc);
+ struct drm_device *dev = crtc->dev;
+ struct tilcdc_drm_private *priv = dev->dev_private;
+ int dpms = tilcdc_crtc->dpms;
+ unsigned int lcd_clk, div;
+ int ret;
+
+ pm_runtime_get_sync(dev->dev);
+
+ if (dpms == DRM_MODE_DPMS_ON)
+ tilcdc_crtc_dpms(crtc, DRM_MODE_DPMS_OFF);
+
+ /* in raster mode, minimum divisor is 2: */
+ ret = clk_set_rate(priv->disp_clk, crtc->mode.clock * 1000 * 2);
+ if (ret) {
+ dev_err(dev->dev, "failed to set display clock rate to: %d\n",
+ crtc->mode.clock);
+ goto out;
+ }
+
+ lcd_clk = clk_get_rate(priv->clk);
+ div = lcd_clk / (crtc->mode.clock * 1000);
+
+ DBG("lcd_clk=%u, mode clock=%d, div=%u", lcd_clk, crtc->mode.clock, div);
+ DBG("fck=%lu, dpll_disp_ck=%lu", clk_get_rate(priv->clk), clk_get_rate(priv->disp_clk));
+
+ /* Configure the LCD clock divisor. */
+ tilcdc_write(dev, LCDC_CTRL_REG, LCDC_CLK_DIVISOR(div) |
+ LCDC_RASTER_MODE);
+
+ if (priv->rev == 2)
+ tilcdc_set(dev, LCDC_CLK_ENABLE_REG,
+ LCDC_V2_DMA_CLK_EN | LCDC_V2_LIDD_CLK_EN |
+ LCDC_V2_CORE_CLK_EN);
+
+ if (dpms == DRM_MODE_DPMS_ON)
+ tilcdc_crtc_dpms(crtc, DRM_MODE_DPMS_ON);
+
+out:
+ pm_runtime_put_sync(dev->dev);
+}
+
+irqreturn_t tilcdc_crtc_irq(struct drm_crtc *crtc)
+{
+ struct tilcdc_crtc *tilcdc_crtc = to_tilcdc_crtc(crtc);
+ struct drm_device *dev = crtc->dev;
+ struct tilcdc_drm_private *priv = dev->dev_private;
+ uint32_t stat = tilcdc_read_irqstatus(dev);
+
+ if ((stat & LCDC_SYNC_LOST) && (stat & LCDC_FIFO_UNDERFLOW)) {
+ stop(crtc);
+ dev_err(dev->dev, "error: %08x\n", stat);
+ tilcdc_clear_irqstatus(dev, stat);
+ start(crtc);
+ } else if (stat & LCDC_PL_LOAD_DONE) {
+ tilcdc_clear_irqstatus(dev, stat);
+ } else {
+ struct drm_pending_vblank_event *event;
+ unsigned long flags;
+ uint32_t dirty = tilcdc_crtc->dirty & stat;
+
+ tilcdc_clear_irqstatus(dev, stat);
+
+ if (dirty & LCDC_END_OF_FRAME0)
+ set_scanout(crtc, 0);
+
+ if (dirty & LCDC_END_OF_FRAME1)
+ set_scanout(crtc, 1);
+
+ drm_handle_vblank(dev, 0);
+
+ spin_lock_irqsave(&dev->event_lock, flags);
+ event = tilcdc_crtc->event;
+ tilcdc_crtc->event = NULL;
+ if (event)
+ drm_send_vblank_event(dev, 0, event);
+ spin_unlock_irqrestore(&dev->event_lock, flags);
+
+ if (dirty && !tilcdc_crtc->dirty)
+ drm_vblank_put(dev, 0);
+ }
+
+ if (priv->rev == 2) {
+ if (stat & LCDC_FRAME_DONE) {
+ tilcdc_crtc->frame_done = true;
+ wake_up(&tilcdc_crtc->frame_done_wq);
+ }
+ tilcdc_write(dev, LCDC_END_OF_INT_IND_REG, 0);
+ }
+
+ return IRQ_HANDLED;
+}
+
+void tilcdc_crtc_cancel_page_flip(struct drm_crtc *crtc, struct drm_file *file)
+{
+ struct tilcdc_crtc *tilcdc_crtc = to_tilcdc_crtc(crtc);
+ struct drm_pending_vblank_event *event;
+ struct drm_device *dev = crtc->dev;
+ unsigned long flags;
+
+ /* Destroy the pending vertical blanking event associated with the
+ * pending page flip, if any, and disable vertical blanking interrupts.
+ */
+ spin_lock_irqsave(&dev->event_lock, flags);
+ event = tilcdc_crtc->event;
+ if (event && event->base.file_priv == file) {
+ tilcdc_crtc->event = NULL;
+ event->base.destroy(&event->base);
+ drm_vblank_put(dev, 0);
+ }
+ spin_unlock_irqrestore(&dev->event_lock, flags);
+}
+
+struct drm_crtc *tilcdc_crtc_create(struct drm_device *dev)
+{
+ struct tilcdc_crtc *tilcdc_crtc;
+ struct drm_crtc *crtc;
+ int ret;
+
+ tilcdc_crtc = kzalloc(sizeof(*tilcdc_crtc), GFP_KERNEL);
+ if (!tilcdc_crtc) {
+ dev_err(dev->dev, "allocation failed\n");
+ return NULL;
+ }
+
+ crtc = &tilcdc_crtc->base;
+
+ tilcdc_crtc->dpms = DRM_MODE_DPMS_OFF;
+ init_waitqueue_head(&tilcdc_crtc->frame_done_wq);
+
+ ret = kfifo_alloc(&tilcdc_crtc->unref_fifo, 16, GFP_KERNEL);
+ if (ret) {
+ dev_err(dev->dev, "could not allocate unref FIFO\n");
+ goto fail;
+ }
+
+ INIT_WORK(&tilcdc_crtc->work, unref_worker);
+
+ ret = drm_crtc_init(dev, crtc, &tilcdc_crtc_funcs);
+ if (ret < 0)
+ goto fail;
+
+ drm_crtc_helper_add(crtc, &tilcdc_crtc_helper_funcs);
+
+ return crtc;
+
+fail:
+ tilcdc_crtc_destroy(crtc);
+ return NULL;
+}
diff --git a/drivers/gpu/drm/tilcdc/tilcdc_drv.c b/drivers/gpu/drm/tilcdc/tilcdc_drv.c
new file mode 100644
index 00000000000..f6defbfaaff
--- /dev/null
+++ b/drivers/gpu/drm/tilcdc/tilcdc_drv.c
@@ -0,0 +1,605 @@
+/*
+ * Copyright (C) 2012 Texas Instruments
+ * Author: Rob Clark <robdclark@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published by
+ * the Free Software Foundation.
+ *
+ * This program is distributed in the hope that 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, see <http://www.gnu.org/licenses/>.
+ */
+
+/* LCDC DRM driver, based on da8xx-fb */
+
+#include "tilcdc_drv.h"
+#include "tilcdc_regs.h"
+#include "tilcdc_tfp410.h"
+
+#include "drm_fb_helper.h"
+
+static LIST_HEAD(module_list);
+
+void tilcdc_module_init(struct tilcdc_module *mod, const char *name,
+ const struct tilcdc_module_ops *funcs)
+{
+ mod->name = name;
+ mod->funcs = funcs;
+ INIT_LIST_HEAD(&mod->list);
+ list_add(&mod->list, &module_list);
+}
+
+void tilcdc_module_cleanup(struct tilcdc_module *mod)
+{
+ list_del(&mod->list);
+}
+
+static struct of_device_id tilcdc_of_match[];
+
+static struct drm_framebuffer *tilcdc_fb_create(struct drm_device *dev,
+ struct drm_file *file_priv, struct drm_mode_fb_cmd2 *mode_cmd)
+{
+ return drm_fb_cma_create(dev, file_priv, mode_cmd);
+}
+
+static void tilcdc_fb_output_poll_changed(struct drm_device *dev)
+{
+ struct tilcdc_drm_private *priv = dev->dev_private;
+ if (priv->fbdev)
+ drm_fbdev_cma_hotplug_event(priv->fbdev);
+}
+
+static const struct drm_mode_config_funcs mode_config_funcs = {
+ .fb_create = tilcdc_fb_create,
+ .output_poll_changed = tilcdc_fb_output_poll_changed,
+};
+
+static int modeset_init(struct drm_device *dev)
+{
+ struct tilcdc_drm_private *priv = dev->dev_private;
+ struct tilcdc_module *mod;
+
+ drm_mode_config_init(dev);
+
+ priv->crtc = tilcdc_crtc_create(dev);
+
+ list_for_each_entry(mod, &module_list, list) {
+ DBG("loading module: %s", mod->name);
+ mod->funcs->modeset_init(mod, dev);
+ }
+
+ if ((priv->num_encoders = 0) || (priv->num_connectors == 0)) {
+ /* oh nos! */
+ dev_err(dev->dev, "no encoders/connectors found\n");
+ return -ENXIO;
+ }
+
+ dev->mode_config.min_width = 0;
+ dev->mode_config.min_height = 0;
+ dev->mode_config.max_width = tilcdc_crtc_max_width(priv->crtc);
+ dev->mode_config.max_height = 2048;
+ dev->mode_config.funcs = &mode_config_funcs;
+
+ return 0;
+}
+
+#ifdef CONFIG_CPU_FREQ
+static int cpufreq_transition(struct notifier_block *nb,
+ unsigned long val, void *data)
+{
+ struct tilcdc_drm_private *priv = container_of(nb,
+ struct tilcdc_drm_private, freq_transition);
+ if (val == CPUFREQ_POSTCHANGE) {
+ if (priv->lcd_fck_rate != clk_get_rate(priv->clk)) {
+ priv->lcd_fck_rate = clk_get_rate(priv->clk);
+ tilcdc_crtc_update_clk(priv->crtc);
+ }
+ }
+
+ return 0;
+}
+#endif
+
+/*
+ * DRM operations:
+ */
+
+static int tilcdc_unload(struct drm_device *dev)
+{
+ struct tilcdc_drm_private *priv = dev->dev_private;
+ struct tilcdc_module *mod, *cur;
+
+ drm_kms_helper_poll_fini(dev);
+ drm_mode_config_cleanup(dev);
+ drm_vblank_cleanup(dev);
+
+ pm_runtime_get_sync(dev->dev);
+ drm_irq_uninstall(dev);
+ pm_runtime_put_sync(dev->dev);
+
+#ifdef CONFIG_CPU_FREQ
+ cpufreq_unregister_notifier(&priv->freq_transition,
+ CPUFREQ_TRANSITION_NOTIFIER);
+#endif
+
+ if (priv->clk)
+ clk_put(priv->clk);
+
+ if (priv->mmio)
+ iounmap(priv->mmio);
+
+ flush_workqueue(priv->wq);
+ destroy_workqueue(priv->wq);
+
+ dev->dev_private = NULL;
+
+ pm_runtime_disable(dev->dev);
+
+ list_for_each_entry_safe(mod, cur, &module_list, list) {
+ DBG("destroying module: %s", mod->name);
+ mod->funcs->destroy(mod);
+ }
+
+ kfree(priv);
+
+ return 0;
+}
+
+static int tilcdc_load(struct drm_device *dev, unsigned long flags)
+{
+ struct platform_device *pdev = dev->platformdev;
+ struct device_node *node = pdev->dev.of_node;
+ struct tilcdc_drm_private *priv;
+ struct resource *res;
+ int ret;
+
+ priv = kzalloc(sizeof(*priv), GFP_KERNEL);
+ if (!priv) {
+ dev_err(dev->dev, "failed to allocate private data\n");
+ return -ENOMEM;
+ }
+
+ dev->dev_private = priv;
+
+ priv->wq = alloc_ordered_workqueue("tilcdc", 0);
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res) {
+ dev_err(dev->dev, "failed to get memory resource\n");
+ ret = -EINVAL;
+ goto fail;
+ }
+
+ priv->mmio = ioremap_nocache(res->start, resource_size(res));
+ if (!priv->mmio) {
+ dev_err(dev->dev, "failed to ioremap\n");
+ ret = -ENOMEM;
+ goto fail;
+ }
+
+ priv->clk = clk_get(dev->dev, "fck");
+ if (IS_ERR(priv->clk)) {
+ dev_err(dev->dev, "failed to get functional clock\n");
+ ret = -ENODEV;
+ goto fail;
+ }
+
+ priv->disp_clk = clk_get(dev->dev, "dpll_disp_ck");
+ if (IS_ERR(priv->clk)) {
+ dev_err(dev->dev, "failed to get display clock\n");
+ ret = -ENODEV;
+ goto fail;
+ }
+
+#ifdef CONFIG_CPU_FREQ
+ priv->lcd_fck_rate = clk_get_rate(priv->clk);
+ priv->freq_transition.notifier_call = cpufreq_transition;
+ ret = cpufreq_register_notifier(&priv->freq_transition,
+ CPUFREQ_TRANSITION_NOTIFIER);
+ if (ret) {
+ dev_err(dev->dev, "failed to register cpufreq notifier\n");
+ goto fail;
+ }
+#endif
+
+ if (of_property_read_u32(node, "max-bandwidth", &priv->max_bandwidth))
+ priv->max_bandwidth = 1280 * 1024 * 60;
+
+ pm_runtime_enable(dev->dev);
+
+ /* Determine LCD IP Version */
+ pm_runtime_get_sync(dev->dev);
+ switch (tilcdc_read(dev, LCDC_PID_REG)) {
+ case 0x4c100102:
+ priv->rev = 1;
+ break;
+ case 0x4f200800:
+ case 0x4f201000:
+ priv->rev = 2;
+ break;
+ default:
+ dev_warn(dev->dev, "Unknown PID Reg value 0x%08x, "
+ "defaulting to LCD revision 1\n",
+ tilcdc_read(dev, LCDC_PID_REG));
+ priv->rev = 1;
+ break;
+ }
+
+ pm_runtime_put_sync(dev->dev);
+
+ ret = modeset_init(dev);
+ if (ret < 0) {
+ dev_err(dev->dev, "failed to initialize mode setting\n");
+ goto fail;
+ }
+
+ ret = drm_vblank_init(dev, 1);
+ if (ret < 0) {
+ dev_err(dev->dev, "failed to initialize vblank\n");
+ goto fail;
+ }
+
+ pm_runtime_get_sync(dev->dev);
+ ret = drm_irq_install(dev);
+ pm_runtime_put_sync(dev->dev);
+ if (ret < 0) {
+ dev_err(dev->dev, "failed to install IRQ handler\n");
+ goto fail;
+ }
+
+ platform_set_drvdata(pdev, dev);
+
+ priv->fbdev = drm_fbdev_cma_init(dev, 16,
+ dev->mode_config.num_crtc,
+ dev->mode_config.num_connector);
+
+ drm_kms_helper_poll_init(dev);
+
+ return 0;
+
+fail:
+ tilcdc_unload(dev);
+ return ret;
+}
+
+static void tilcdc_preclose(struct drm_device *dev, struct drm_file *file)
+{
+ struct tilcdc_drm_private *priv = dev->dev_private;
+
+ tilcdc_crtc_cancel_page_flip(priv->crtc, file);
+}
+
+static void tilcdc_lastclose(struct drm_device *dev)
+{
+ struct tilcdc_drm_private *priv = dev->dev_private;
+ drm_fbdev_cma_restore_mode(priv->fbdev);
+}
+
+static irqreturn_t tilcdc_irq(DRM_IRQ_ARGS)
+{
+ struct drm_device *dev = arg;
+ struct tilcdc_drm_private *priv = dev->dev_private;
+ return tilcdc_crtc_irq(priv->crtc);
+}
+
+static void tilcdc_irq_preinstall(struct drm_device *dev)
+{
+ tilcdc_clear_irqstatus(dev, 0xffffffff);
+}
+
+static int tilcdc_irq_postinstall(struct drm_device *dev)
+{
+ struct tilcdc_drm_private *priv = dev->dev_private;
+
+ /* enable FIFO underflow irq: */
+ if (priv->rev == 1) {
+ tilcdc_set(dev, LCDC_RASTER_CTRL_REG, LCDC_V1_UNDERFLOW_INT_ENA);
+ } else {
+ tilcdc_set(dev, LCDC_INT_ENABLE_SET_REG, LCDC_V2_UNDERFLOW_INT_ENA);
+ }
+
+ return 0;
+}
+
+static void tilcdc_irq_uninstall(struct drm_device *dev)
+{
+ struct tilcdc_drm_private *priv = dev->dev_private;
+
+ /* disable irqs that we might have enabled: */
+ if (priv->rev == 1) {
+ tilcdc_clear(dev, LCDC_RASTER_CTRL_REG,
+ LCDC_V1_UNDERFLOW_INT_ENA | LCDC_V1_PL_INT_ENA);
+ tilcdc_clear(dev, LCDC_DMA_CTRL_REG, LCDC_V1_END_OF_FRAME_INT_ENA);
+ } else {
+ tilcdc_clear(dev, LCDC_INT_ENABLE_SET_REG,
+ LCDC_V2_UNDERFLOW_INT_ENA | LCDC_V2_PL_INT_ENA |
+ LCDC_V2_END_OF_FRAME0_INT_ENA | LCDC_V2_END_OF_FRAME1_INT_ENA |
+ LCDC_FRAME_DONE);
+ }
+
+}
+
+static void enable_vblank(struct drm_device *dev, bool enable)
+{
+ struct tilcdc_drm_private *priv = dev->dev_private;
+ u32 reg, mask;
+
+ if (priv->rev == 1) {
+ reg = LCDC_DMA_CTRL_REG;
+ mask = LCDC_V1_END_OF_FRAME_INT_ENA;
+ } else {
+ reg = LCDC_INT_ENABLE_SET_REG;
+ mask = LCDC_V2_END_OF_FRAME0_INT_ENA |
+ LCDC_V2_END_OF_FRAME1_INT_ENA | LCDC_FRAME_DONE;
+ }
+
+ if (enable)
+ tilcdc_set(dev, reg, mask);
+ else
+ tilcdc_clear(dev, reg, mask);
+}
+
+static int tilcdc_enable_vblank(struct drm_device *dev, int crtc)
+{
+ enable_vblank(dev, true);
+ return 0;
+}
+
+static void tilcdc_disable_vblank(struct drm_device *dev, int crtc)
+{
+ enable_vblank(dev, false);
+}
+
+#if defined(CONFIG_DEBUG_FS) || defined(CONFIG_PM_SLEEP)
+static const struct {
+ const char *name;
+ uint8_t rev;
+ uint8_t save;
+ uint32_t reg;
+} registers[] = {
+#define REG(rev, save, reg) { #reg, rev, save, reg }
+ /* exists in revision 1: */
+ REG(1, false, LCDC_PID_REG),
+ REG(1, true, LCDC_CTRL_REG),
+ REG(1, false, LCDC_STAT_REG),
+ REG(1, true, LCDC_RASTER_CTRL_REG),
+ REG(1, true, LCDC_RASTER_TIMING_0_REG),
+ REG(1, true, LCDC_RASTER_TIMING_1_REG),
+ REG(1, true, LCDC_RASTER_TIMING_2_REG),
+ REG(1, true, LCDC_DMA_CTRL_REG),
+ REG(1, true, LCDC_DMA_FB_BASE_ADDR_0_REG),
+ REG(1, true, LCDC_DMA_FB_CEILING_ADDR_0_REG),
+ REG(1, true, LCDC_DMA_FB_BASE_ADDR_1_REG),
+ REG(1, true, LCDC_DMA_FB_CEILING_ADDR_1_REG),
+ /* new in revision 2: */
+ REG(2, false, LCDC_RAW_STAT_REG),
+ REG(2, false, LCDC_MASKED_STAT_REG),
+ REG(2, false, LCDC_INT_ENABLE_SET_REG),
+ REG(2, false, LCDC_INT_ENABLE_CLR_REG),
+ REG(2, false, LCDC_END_OF_INT_IND_REG),
+ REG(2, true, LCDC_CLK_ENABLE_REG),
+ REG(2, true, LCDC_INT_ENABLE_SET_REG),
+#undef REG
+};
+#endif
+
+#ifdef CONFIG_DEBUG_FS
+static int tilcdc_regs_show(struct seq_file *m, void *arg)
+{
+ struct drm_info_node *node = (struct drm_info_node *) m->private;
+ struct drm_device *dev = node->minor->dev;
+ struct tilcdc_drm_private *priv = dev->dev_private;
+ unsigned i;
+
+ pm_runtime_get_sync(dev->dev);
+
+ seq_printf(m, "revision: %d\n", priv->rev);
+
+ for (i = 0; i < ARRAY_SIZE(registers); i++)
+ if (priv->rev >= registers[i].rev)
+ seq_printf(m, "%s:\t %08x\n", registers[i].name,
+ tilcdc_read(dev, registers[i].reg));
+
+ pm_runtime_put_sync(dev->dev);
+
+ return 0;
+}
+
+static int tilcdc_mm_show(struct seq_file *m, void *arg)
+{
+ struct drm_info_node *node = (struct drm_info_node *) m->private;
+ struct drm_device *dev = node->minor->dev;
+ return drm_mm_dump_table(m, dev->mm_private);
+}
+
+static struct drm_info_list tilcdc_debugfs_list[] = {
+ { "regs", tilcdc_regs_show, 0 },
+ { "mm", tilcdc_mm_show, 0 },
+ { "fb", drm_fb_cma_debugfs_show, 0 },
+};
+
+static int tilcdc_debugfs_init(struct drm_minor *minor)
+{
+ struct drm_device *dev = minor->dev;
+ struct tilcdc_module *mod;
+ int ret;
+
+ ret = drm_debugfs_create_files(tilcdc_debugfs_list,
+ ARRAY_SIZE(tilcdc_debugfs_list),
+ minor->debugfs_root, minor);
+
+ list_for_each_entry(mod, &module_list, list)
+ if (mod->funcs->debugfs_init)
+ mod->funcs->debugfs_init(mod, minor);
+
+ if (ret) {
+ dev_err(dev->dev, "could not install tilcdc_debugfs_list\n");
+ return ret;
+ }
+
+ return ret;
+}
+
+static void tilcdc_debugfs_cleanup(struct drm_minor *minor)
+{
+ struct tilcdc_module *mod;
+ drm_debugfs_remove_files(tilcdc_debugfs_list,
+ ARRAY_SIZE(tilcdc_debugfs_list), minor);
+
+ list_for_each_entry(mod, &module_list, list)
+ if (mod->funcs->debugfs_cleanup)
+ mod->funcs->debugfs_cleanup(mod, minor);
+}
+#endif
+
+static const struct file_operations fops = {
+ .owner = THIS_MODULE,
+ .open = drm_open,
+ .release = drm_release,
+ .unlocked_ioctl = drm_ioctl,
+#ifdef CONFIG_COMPAT
+ .compat_ioctl = drm_compat_ioctl,
+#endif
+ .poll = drm_poll,
+ .read = drm_read,
+ .fasync = drm_fasync,
+ .llseek = no_llseek,
+ .mmap = drm_gem_cma_mmap,
+};
+
+static struct drm_driver tilcdc_driver = {
+ .driver_features = DRIVER_HAVE_IRQ | DRIVER_GEM | DRIVER_MODESET,
+ .load = tilcdc_load,
+ .unload = tilcdc_unload,
+ .preclose = tilcdc_preclose,
+ .lastclose = tilcdc_lastclose,
+ .irq_handler = tilcdc_irq,
+ .irq_preinstall = tilcdc_irq_preinstall,
+ .irq_postinstall = tilcdc_irq_postinstall,
+ .irq_uninstall = tilcdc_irq_uninstall,
+ .get_vblank_counter = drm_vblank_count,
+ .enable_vblank = tilcdc_enable_vblank,
+ .disable_vblank = tilcdc_disable_vblank,
+ .gem_free_object = drm_gem_cma_free_object,
+ .gem_vm_ops = &drm_gem_cma_vm_ops,
+ .dumb_create = drm_gem_cma_dumb_create,
+ .dumb_map_offset = drm_gem_cma_dumb_map_offset,
+ .dumb_destroy = drm_gem_cma_dumb_destroy,
+#ifdef CONFIG_DEBUG_FS
+ .debugfs_init = tilcdc_debugfs_init,
+ .debugfs_cleanup = tilcdc_debugfs_cleanup,
+#endif
+ .fops = &fops,
+ .name = "tilcdc",
+ .desc = "TI LCD Controller DRM",
+ .date = "20121205",
+ .major = 1,
+ .minor = 0,
+};
+
+/*
+ * Power management:
+ */
+
+#ifdef CONFIG_PM_SLEEP
+static int tilcdc_pm_suspend(struct device *dev)
+{
+ struct drm_device *ddev = dev_get_drvdata(dev);
+ struct tilcdc_drm_private *priv = ddev->dev_private;
+ unsigned i, n = 0;
+
+ drm_kms_helper_poll_disable(ddev);
+
+ /* Save register state: */
+ for (i = 0; i < ARRAY_SIZE(registers); i++)
+ if (registers[i].save && (priv->rev >= registers[i].rev))
+ priv->saved_register[n++] = tilcdc_read(ddev, registers[i].reg);
+
+ return 0;
+}
+
+static int tilcdc_pm_resume(struct device *dev)
+{
+ struct drm_device *ddev = dev_get_drvdata(dev);
+ struct tilcdc_drm_private *priv = ddev->dev_private;
+ unsigned i, n = 0;
+
+ /* Restore register state: */
+ for (i = 0; i < ARRAY_SIZE(registers); i++)
+ if (registers[i].save && (priv->rev >= registers[i].rev))
+ tilcdc_write(ddev, registers[i].reg, priv->saved_register[n++]);
+
+ drm_kms_helper_poll_enable(ddev);
+
+ return 0;
+}
+#endif
+
+static const struct dev_pm_ops tilcdc_pm_ops = {
+ SET_SYSTEM_SLEEP_PM_OPS(tilcdc_pm_suspend, tilcdc_pm_resume)
+};
+
+/*
+ * Platform driver:
+ */
+
+static int tilcdc_pdev_probe(struct platform_device *pdev)
+{
+ /* bail out early if no DT data: */
+ if (!pdev->dev.of_node) {
+ dev_err(&pdev->dev, "device-tree data is missing\n");
+ return -ENXIO;
+ }
+
+ return drm_platform_init(&tilcdc_driver, pdev);
+}
+
+static int tilcdc_pdev_remove(struct platform_device *pdev)
+{
+ drm_platform_exit(&tilcdc_driver, pdev);
+
+ return 0;
+}
+
+static struct of_device_id tilcdc_of_match[] = {
+ { .compatible = "ti,am33xx-tilcdc", },
+ { },
+};
+MODULE_DEVICE_TABLE(of, tilcdc_of_match);
+
+static struct platform_driver tilcdc_platform_driver = {
+ .probe = tilcdc_pdev_probe,
+ .remove = tilcdc_pdev_remove,
+ .driver = {
+ .owner = THIS_MODULE,
+ .name = "tilcdc",
+ .pm = &tilcdc_pm_ops,
+ .of_match_table = tilcdc_of_match,
+ },
+};
+
+static int __init tilcdc_drm_init(void)
+{
+ DBG("init");
+ tilcdc_tfp410_init();
+ return platform_driver_register(&tilcdc_platform_driver);
+}
+
+static void __exit tilcdc_drm_fini(void)
+{
+ DBG("fini");
+ tilcdc_tfp410_fini();
+ platform_driver_unregister(&tilcdc_platform_driver);
+}
+
+module_init(tilcdc_drm_init);
+module_exit(tilcdc_drm_fini);
+
+MODULE_AUTHOR("Rob Clark <robdclark@gmail.com");
+MODULE_DESCRIPTION("TI LCD Controller DRM Driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/gpu/drm/tilcdc/tilcdc_drv.h b/drivers/gpu/drm/tilcdc/tilcdc_drv.h
new file mode 100644
index 00000000000..8242b5a4307
--- /dev/null
+++ b/drivers/gpu/drm/tilcdc/tilcdc_drv.h
@@ -0,0 +1,150 @@
+/*
+ * Copyright (C) 2012 Texas Instruments
+ * Author: Rob Clark <robdclark@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published by
+ * the Free Software Foundation.
+ *
+ * This program is distributed in the hope that 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, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef __TILCDC_DRV_H__
+#define __TILCDC_DRV_H__
+
+#include <linux/clk.h>
+#include <linux/cpufreq.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/pm.h>
+#include <linux/pm_runtime.h>
+#include <linux/slab.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/list.h>
+
+#include <drm/drmP.h>
+#include <drm/drm_crtc_helper.h>
+#include <drm/drm_gem_cma_helper.h>
+#include <drm/drm_fb_cma_helper.h>
+
+struct tilcdc_drm_private {
+ void __iomem *mmio;
+
+ struct clk *disp_clk; /* display dpll */
+ struct clk *clk; /* functional clock */
+ int rev; /* IP revision */
+
+ /* don't attempt resolutions w/ higher W * H * Hz: */
+ uint32_t max_bandwidth;
+
+ /* register contents saved across suspend/resume: */
+ u32 saved_register[12];
+
+#ifdef CONFIG_CPU_FREQ
+ struct notifier_block freq_transition;
+ unsigned int lcd_fck_rate;
+#endif
+
+ struct workqueue_struct *wq;
+
+ struct drm_fbdev_cma *fbdev;
+
+ struct drm_crtc *crtc;
+
+ unsigned int num_encoders;
+ struct drm_encoder *encoders[8];
+
+ unsigned int num_connectors;
+ struct drm_connector *connectors[8];
+};
+
+/* Sub-module for display. Since we don't know at compile time what panels
+ * or display adapter(s) might be present (for ex, off chip dvi/tfp410,
+ * hdmi encoder, various lcd panels), the connector/encoder(s) are split into
+ * separate drivers. If they are probed and found to be present, they
+ * register themselves with tilcdc_register_module().
+ */
+struct tilcdc_module;
+
+struct tilcdc_module_ops {
+ /* create appropriate encoders/connectors: */
+ int (*modeset_init)(struct tilcdc_module *mod, struct drm_device *dev);
+ void (*destroy)(struct tilcdc_module *mod);
+#ifdef CONFIG_DEBUG_FS
+ /* create debugfs nodes (can be NULL): */
+ int (*debugfs_init)(struct tilcdc_module *mod, struct drm_minor *minor);
+ /* cleanup debugfs nodes (can be NULL): */
+ void (*debugfs_cleanup)(struct tilcdc_module *mod, struct drm_minor *minor);
+#endif
+};
+
+struct tilcdc_module {
+ const char *name;
+ struct list_head list;
+ const struct tilcdc_module_ops *funcs;
+};
+
+void tilcdc_module_init(struct tilcdc_module *mod, const char *name,
+ const struct tilcdc_module_ops *funcs);
+void tilcdc_module_cleanup(struct tilcdc_module *mod);
+
+
+/* Panel config that needs to be set in the crtc, but is not coming from
+ * the mode timings. The display module is expected to call
+ * tilcdc_crtc_set_panel_info() to set this during modeset.
+ */
+struct tilcdc_panel_info {
+
+ /* AC Bias Pin Frequency */
+ uint32_t ac_bias;
+
+ /* AC Bias Pin Transitions per Interrupt */
+ uint32_t ac_bias_intrpt;
+
+ /* DMA burst size */
+ uint32_t dma_burst_sz;
+
+ /* Bits per pixel */
+ uint32_t bpp;
+
+ /* FIFO DMA Request Delay */
+ uint32_t fdd;
+
+ /* TFT Alternative Signal Mapping (Only for active) */
+ bool tft_alt_mode;
+
+ /* Invert pixel clock */
+ bool invert_pxl_clk;
+
+ /* Horizontal and Vertical Sync Edge: 0=rising 1=falling */
+ uint32_t sync_edge;
+
+ /* Horizontal and Vertical Sync: Control: 0=ignore */
+ uint32_t sync_ctrl;
+
+ /* Raster Data Order Select: 1=Most-to-least 0=Least-to-most */
+ uint32_t raster_order;
+
+ /* DMA FIFO threshold */
+ uint32_t fifo_th;
+};
+
+#define DBG(fmt, ...) DRM_DEBUG(fmt"\n", ##__VA_ARGS__)
+
+struct drm_crtc *tilcdc_crtc_create(struct drm_device *dev);
+void tilcdc_crtc_cancel_page_flip(struct drm_crtc *crtc, struct drm_file *file);
+irqreturn_t tilcdc_crtc_irq(struct drm_crtc *crtc);
+void tilcdc_crtc_update_clk(struct drm_crtc *crtc);
+void tilcdc_crtc_set_panel_info(struct drm_crtc *crtc,
+ const struct tilcdc_panel_info *info);
+int tilcdc_crtc_mode_valid(struct drm_crtc *crtc, struct drm_display_mode *mode);
+int tilcdc_crtc_max_width(struct drm_crtc *crtc);
+
+#endif /* __TILCDC_DRV_H__ */
diff --git a/drivers/gpu/drm/tilcdc/tilcdc_regs.h b/drivers/gpu/drm/tilcdc/tilcdc_regs.h
new file mode 100644
index 00000000000..17fd1b45428
--- /dev/null
+++ b/drivers/gpu/drm/tilcdc/tilcdc_regs.h
@@ -0,0 +1,154 @@
+/*
+ * Copyright (C) 2012 Texas Instruments
+ * Author: Rob Clark <robdclark@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published by
+ * the Free Software Foundation.
+ *
+ * This program is distributed in the hope that 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, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef __TILCDC_REGS_H__
+#define __TILCDC_REGS_H__
+
+/* LCDC register definitions, based on da8xx-fb */
+
+#include <linux/bitops.h>
+
+#include "tilcdc_drv.h"
+
+/* LCDC Status Register */
+#define LCDC_END_OF_FRAME1 BIT(9)
+#define LCDC_END_OF_FRAME0 BIT(8)
+#define LCDC_PL_LOAD_DONE BIT(6)
+#define LCDC_FIFO_UNDERFLOW BIT(5)
+#define LCDC_SYNC_LOST BIT(2)
+#define LCDC_FRAME_DONE BIT(0)
+
+/* LCDC DMA Control Register */
+#define LCDC_DMA_BURST_SIZE(x) ((x) << 4)
+#define LCDC_DMA_BURST_1 0x0
+#define LCDC_DMA_BURST_2 0x1
+#define LCDC_DMA_BURST_4 0x2
+#define LCDC_DMA_BURST_8 0x3
+#define LCDC_DMA_BURST_16 0x4
+#define LCDC_V1_END_OF_FRAME_INT_ENA BIT(2)
+#define LCDC_V2_END_OF_FRAME0_INT_ENA BIT(8)
+#define LCDC_V2_END_OF_FRAME1_INT_ENA BIT(9)
+#define LCDC_DUAL_FRAME_BUFFER_ENABLE BIT(0)
+
+/* LCDC Control Register */
+#define LCDC_CLK_DIVISOR(x) ((x) << 8)
+#define LCDC_RASTER_MODE 0x01
+
+/* LCDC Raster Control Register */
+#define LCDC_PALETTE_LOAD_MODE(x) ((x) << 20)
+#define PALETTE_AND_DATA 0x00
+#define PALETTE_ONLY 0x01
+#define DATA_ONLY 0x02
+
+#define LCDC_MONO_8BIT_MODE BIT(9)
+#define LCDC_RASTER_ORDER BIT(8)
+#define LCDC_TFT_MODE BIT(7)
+#define LCDC_V1_UNDERFLOW_INT_ENA BIT(6)
+#define LCDC_V2_UNDERFLOW_INT_ENA BIT(5)
+#define LCDC_V1_PL_INT_ENA BIT(4)
+#define LCDC_V2_PL_INT_ENA BIT(6)
+#define LCDC_MONOCHROME_MODE BIT(1)
+#define LCDC_RASTER_ENABLE BIT(0)
+#define LCDC_TFT_ALT_ENABLE BIT(23)
+#define LCDC_STN_565_ENABLE BIT(24)
+#define LCDC_V2_DMA_CLK_EN BIT(2)
+#define LCDC_V2_LIDD_CLK_EN BIT(1)
+#define LCDC_V2_CORE_CLK_EN BIT(0)
+#define LCDC_V2_LPP_B10 26
+#define LCDC_V2_TFT_24BPP_MODE BIT(25)
+#define LCDC_V2_TFT_24BPP_UNPACK BIT(26)
+
+/* LCDC Raster Timing 2 Register */
+#define LCDC_AC_BIAS_TRANSITIONS_PER_INT(x) ((x) << 16)
+#define LCDC_AC_BIAS_FREQUENCY(x) ((x) << 8)
+#define LCDC_SYNC_CTRL BIT(25)
+#define LCDC_SYNC_EDGE BIT(24)
+#define LCDC_INVERT_PIXEL_CLOCK BIT(22)
+#define LCDC_INVERT_HSYNC BIT(21)
+#define LCDC_INVERT_VSYNC BIT(20)
+
+/* LCDC Block */
+#define LCDC_PID_REG 0x0
+#define LCDC_CTRL_REG 0x4
+#define LCDC_STAT_REG 0x8
+#define LCDC_RASTER_CTRL_REG 0x28
+#define LCDC_RASTER_TIMING_0_REG 0x2c
+#define LCDC_RASTER_TIMING_1_REG 0x30
+#define LCDC_RASTER_TIMING_2_REG 0x34
+#define LCDC_DMA_CTRL_REG 0x40
+#define LCDC_DMA_FB_BASE_ADDR_0_REG 0x44
+#define LCDC_DMA_FB_CEILING_ADDR_0_REG 0x48
+#define LCDC_DMA_FB_BASE_ADDR_1_REG 0x4c
+#define LCDC_DMA_FB_CEILING_ADDR_1_REG 0x50
+
+/* Interrupt Registers available only in Version 2 */
+#define LCDC_RAW_STAT_REG 0x58
+#define LCDC_MASKED_STAT_REG 0x5c
+#define LCDC_INT_ENABLE_SET_REG 0x60
+#define LCDC_INT_ENABLE_CLR_REG 0x64
+#define LCDC_END_OF_INT_IND_REG 0x68
+
+/* Clock registers available only on Version 2 */
+#define LCDC_CLK_ENABLE_REG 0x6c
+#define LCDC_CLK_RESET_REG 0x70
+#define LCDC_CLK_MAIN_RESET BIT(3)
+
+
+/*
+ * Helpers:
+ */
+
+static inline void tilcdc_write(struct drm_device *dev, u32 reg, u32 data)
+{
+ struct tilcdc_drm_private *priv = dev->dev_private;
+ iowrite32(data, priv->mmio + reg);
+}
+
+static inline u32 tilcdc_read(struct drm_device *dev, u32 reg)
+{
+ struct tilcdc_drm_private *priv = dev->dev_private;
+ return ioread32(priv->mmio + reg);
+}
+
+static inline void tilcdc_set(struct drm_device *dev, u32 reg, u32 mask)
+{
+ tilcdc_write(dev, reg, tilcdc_read(dev, reg) | mask);
+}
+
+static inline void tilcdc_clear(struct drm_device *dev, u32 reg, u32 mask)
+{
+ tilcdc_write(dev, reg, tilcdc_read(dev, reg) & ~mask);
+}
+
+/* the register to read/clear irqstatus differs between v1 and v2 of the IP */
+static inline u32 tilcdc_irqstatus_reg(struct drm_device *dev)
+{
+ struct tilcdc_drm_private *priv = dev->dev_private;
+ return (priv->rev == 2) ? LCDC_MASKED_STAT_REG : LCDC_STAT_REG;
+}
+
+static inline u32 tilcdc_read_irqstatus(struct drm_device *dev)
+{
+ return tilcdc_read(dev, tilcdc_irqstatus_reg(dev));
+}
+
+static inline void tilcdc_clear_irqstatus(struct drm_device *dev, u32 mask)
+{
+ tilcdc_write(dev, tilcdc_irqstatus_reg(dev), mask);
+}
+
+#endif /* __TILCDC_REGS_H__ */
diff --git a/drivers/gpu/drm/tilcdc/tilcdc_tfp410.c b/drivers/gpu/drm/tilcdc/tilcdc_tfp410.c
new file mode 100644
index 00000000000..58d487ba241
--- /dev/null
+++ b/drivers/gpu/drm/tilcdc/tilcdc_tfp410.c
@@ -0,0 +1,419 @@
+/*
+ * Copyright (C) 2012 Texas Instruments
+ * Author: Rob Clark <robdclark@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published by
+ * the Free Software Foundation.
+ *
+ * This program is distributed in the hope that 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, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <linux/i2c.h>
+#include <linux/of_i2c.h>
+#include <linux/gpio.h>
+#include <linux/of_gpio.h>
+#include <linux/pinctrl/pinmux.h>
+#include <linux/pinctrl/consumer.h>
+
+#include "tilcdc_drv.h"
+
+struct tfp410_module {
+ struct tilcdc_module base;
+ struct i2c_adapter *i2c;
+ int gpio;
+};
+#define to_tfp410_module(x) container_of(x, struct tfp410_module, base)
+
+
+static const struct tilcdc_panel_info dvi_info = {
+ .ac_bias = 255,
+ .ac_bias_intrpt = 0,
+ .dma_burst_sz = 16,
+ .bpp = 16,
+ .fdd = 0x80,
+ .tft_alt_mode = 0,
+ .sync_edge = 0,
+ .sync_ctrl = 1,
+ .raster_order = 0,
+};
+
+/*
+ * Encoder:
+ */
+
+struct tfp410_encoder {
+ struct drm_encoder base;
+ struct tfp410_module *mod;
+ int dpms;
+};
+#define to_tfp410_encoder(x) container_of(x, struct tfp410_encoder, base)
+
+
+static void tfp410_encoder_destroy(struct drm_encoder *encoder)
+{
+ struct tfp410_encoder *tfp410_encoder = to_tfp410_encoder(encoder);
+ drm_encoder_cleanup(encoder);
+ kfree(tfp410_encoder);
+}
+
+static void tfp410_encoder_dpms(struct drm_encoder *encoder, int mode)
+{
+ struct tfp410_encoder *tfp410_encoder = to_tfp410_encoder(encoder);
+
+ if (tfp410_encoder->dpms == mode)
+ return;
+
+ if (mode == DRM_MODE_DPMS_ON) {
+ DBG("Power on");
+ gpio_direction_output(tfp410_encoder->mod->gpio, 1);
+ } else {
+ DBG("Power off");
+ gpio_direction_output(tfp410_encoder->mod->gpio, 0);
+ }
+
+ tfp410_encoder->dpms = mode;
+}
+
+static bool tfp410_encoder_mode_fixup(struct drm_encoder *encoder,
+ const struct drm_display_mode *mode,
+ struct drm_display_mode *adjusted_mode)
+{
+ /* nothing needed */
+ return true;
+}
+
+static void tfp410_encoder_prepare(struct drm_encoder *encoder)
+{
+ tfp410_encoder_dpms(encoder, DRM_MODE_DPMS_OFF);
+ tilcdc_crtc_set_panel_info(encoder->crtc, &dvi_info);
+}
+
+static void tfp410_encoder_commit(struct drm_encoder *encoder)
+{
+ tfp410_encoder_dpms(encoder, DRM_MODE_DPMS_ON);
+}
+
+static void tfp410_encoder_mode_set(struct drm_encoder *encoder,
+ struct drm_display_mode *mode,
+ struct drm_display_mode *adjusted_mode)
+{
+ /* nothing needed */
+}
+
+static const struct drm_encoder_funcs tfp410_encoder_funcs = {
+ .destroy = tfp410_encoder_destroy,
+};
+
+static const struct drm_encoder_helper_funcs tfp410_encoder_helper_funcs = {
+ .dpms = tfp410_encoder_dpms,
+ .mode_fixup = tfp410_encoder_mode_fixup,
+ .prepare = tfp410_encoder_prepare,
+ .commit = tfp410_encoder_commit,
+ .mode_set = tfp410_encoder_mode_set,
+};
+
+static struct drm_encoder *tfp410_encoder_create(struct drm_device *dev,
+ struct tfp410_module *mod)
+{
+ struct tfp410_encoder *tfp410_encoder;
+ struct drm_encoder *encoder;
+ int ret;
+
+ tfp410_encoder = kzalloc(sizeof(*tfp410_encoder), GFP_KERNEL);
+ if (!tfp410_encoder) {
+ dev_err(dev->dev, "allocation failed\n");
+ return NULL;
+ }
+
+ tfp410_encoder->dpms = DRM_MODE_DPMS_OFF;
+ tfp410_encoder->mod = mod;
+
+ encoder = &tfp410_encoder->base;
+ encoder->possible_crtcs = 1;
+
+ ret = drm_encoder_init(dev, encoder, &tfp410_encoder_funcs,
+ DRM_MODE_ENCODER_TMDS);
+ if (ret < 0)
+ goto fail;
+
+ drm_encoder_helper_add(encoder, &tfp410_encoder_helper_funcs);
+
+ return encoder;
+
+fail:
+ tfp410_encoder_destroy(encoder);
+ return NULL;
+}
+
+/*
+ * Connector:
+ */
+
+struct tfp410_connector {
+ struct drm_connector base;
+
+ struct drm_encoder *encoder; /* our connected encoder */
+ struct tfp410_module *mod;
+};
+#define to_tfp410_connector(x) container_of(x, struct tfp410_connector, base)
+
+
+static void tfp410_connector_destroy(struct drm_connector *connector)
+{
+ struct tfp410_connector *tfp410_connector = to_tfp410_connector(connector);
+ drm_connector_cleanup(connector);
+ kfree(tfp410_connector);
+}
+
+static enum drm_connector_status tfp410_connector_detect(
+ struct drm_connector *connector,
+ bool force)
+{
+ struct tfp410_connector *tfp410_connector = to_tfp410_connector(connector);
+
+ if (drm_probe_ddc(tfp410_connector->mod->i2c))
+ return connector_status_connected;
+
+ return connector_status_unknown;
+}
+
+static int tfp410_connector_get_modes(struct drm_connector *connector)
+{
+ struct tfp410_connector *tfp410_connector = to_tfp410_connector(connector);
+ struct edid *edid;
+ int ret = 0;
+
+ edid = drm_get_edid(connector, tfp410_connector->mod->i2c);
+
+ drm_mode_connector_update_edid_property(connector, edid);
+
+ if (edid) {
+ ret = drm_add_edid_modes(connector, edid);
+ kfree(edid);
+ }
+
+ return ret;
+}
+
+static int tfp410_connector_mode_valid(struct drm_connector *connector,
+ struct drm_display_mode *mode)
+{
+ struct tilcdc_drm_private *priv = connector->dev->dev_private;
+ /* our only constraints are what the crtc can generate: */
+ return tilcdc_crtc_mode_valid(priv->crtc, mode);
+}
+
+static struct drm_encoder *tfp410_connector_best_encoder(
+ struct drm_connector *connector)
+{
+ struct tfp410_connector *tfp410_connector = to_tfp410_connector(connector);
+ return tfp410_connector->encoder;
+}
+
+static const struct drm_connector_funcs tfp410_connector_funcs = {
+ .destroy = tfp410_connector_destroy,
+ .dpms = drm_helper_connector_dpms,
+ .detect = tfp410_connector_detect,
+ .fill_modes = drm_helper_probe_single_connector_modes,
+};
+
+static const struct drm_connector_helper_funcs tfp410_connector_helper_funcs = {
+ .get_modes = tfp410_connector_get_modes,
+ .mode_valid = tfp410_connector_mode_valid,
+ .best_encoder = tfp410_connector_best_encoder,
+};
+
+static struct drm_connector *tfp410_connector_create(struct drm_device *dev,
+ struct tfp410_module *mod, struct drm_encoder *encoder)
+{
+ struct tfp410_connector *tfp410_connector;
+ struct drm_connector *connector;
+ int ret;
+
+ tfp410_connector = kzalloc(sizeof(*tfp410_connector), GFP_KERNEL);
+ if (!tfp410_connector) {
+ dev_err(dev->dev, "allocation failed\n");
+ return NULL;
+ }
+
+ tfp410_connector->encoder = encoder;
+ tfp410_connector->mod = mod;
+
+ connector = &tfp410_connector->base;
+
+ drm_connector_init(dev, connector, &tfp410_connector_funcs,
+ DRM_MODE_CONNECTOR_DVID);
+ drm_connector_helper_add(connector, &tfp410_connector_helper_funcs);
+
+ connector->polled = DRM_CONNECTOR_POLL_CONNECT |
+ DRM_CONNECTOR_POLL_DISCONNECT;
+
+ connector->interlace_allowed = 0;
+ connector->doublescan_allowed = 0;
+
+ ret = drm_mode_connector_attach_encoder(connector, encoder);
+ if (ret)
+ goto fail;
+
+ drm_sysfs_connector_add(connector);
+
+ return connector;
+
+fail:
+ tfp410_connector_destroy(connector);
+ return NULL;
+}
+
+/*
+ * Module:
+ */
+
+static int tfp410_modeset_init(struct tilcdc_module *mod, struct drm_device *dev)
+{
+ struct tfp410_module *tfp410_mod = to_tfp410_module(mod);
+ struct tilcdc_drm_private *priv = dev->dev_private;
+ struct drm_encoder *encoder;
+ struct drm_connector *connector;
+
+ encoder = tfp410_encoder_create(dev, tfp410_mod);
+ if (!encoder)
+ return -ENOMEM;
+
+ connector = tfp410_connector_create(dev, tfp410_mod, encoder);
+ if (!connector)
+ return -ENOMEM;
+
+ priv->encoders[priv->num_encoders++] = encoder;
+ priv->connectors[priv->num_connectors++] = connector;
+
+ return 0;
+}
+
+static void tfp410_destroy(struct tilcdc_module *mod)
+{
+ struct tfp410_module *tfp410_mod = to_tfp410_module(mod);
+
+ if (tfp410_mod->i2c)
+ i2c_put_adapter(tfp410_mod->i2c);
+
+ if (!IS_ERR_VALUE(tfp410_mod->gpio))
+ gpio_free(tfp410_mod->gpio);
+
+ tilcdc_module_cleanup(mod);
+ kfree(tfp410_mod);
+}
+
+static const struct tilcdc_module_ops tfp410_module_ops = {
+ .modeset_init = tfp410_modeset_init,
+ .destroy = tfp410_destroy,
+};
+
+/*
+ * Device:
+ */
+
+static struct of_device_id tfp410_of_match[];
+
+static int tfp410_probe(struct platform_device *pdev)
+{
+ struct device_node *node = pdev->dev.of_node;
+ struct device_node *i2c_node;
+ struct tfp410_module *tfp410_mod;
+ struct tilcdc_module *mod;
+ struct pinctrl *pinctrl;
+ uint32_t i2c_phandle;
+ int ret = -EINVAL;
+
+ /* bail out early if no DT data: */
+ if (!node) {
+ dev_err(&pdev->dev, "device-tree data is missing\n");
+ return -ENXIO;
+ }
+
+ tfp410_mod = kzalloc(sizeof(*tfp410_mod), GFP_KERNEL);
+ if (!tfp410_mod)
+ return -ENOMEM;
+
+ mod = &tfp410_mod->base;
+
+ tilcdc_module_init(mod, "tfp410", &tfp410_module_ops);
+
+ pinctrl = devm_pinctrl_get_select_default(&pdev->dev);
+ if (IS_ERR(pinctrl))
+ dev_warn(&pdev->dev, "pins are not configured\n");
+
+ if (of_property_read_u32(node, "i2c", &i2c_phandle)) {
+ dev_err(&pdev->dev, "could not get i2c bus phandle\n");
+ goto fail;
+ }
+
+ i2c_node = of_find_node_by_phandle(i2c_phandle);
+ if (!i2c_node) {
+ dev_err(&pdev->dev, "could not get i2c bus node\n");
+ goto fail;
+ }
+
+ tfp410_mod->i2c = of_find_i2c_adapter_by_node(i2c_node);
+ if (!tfp410_mod->i2c) {
+ dev_err(&pdev->dev, "could not get i2c\n");
+ goto fail;
+ }
+
+ of_node_put(i2c_node);
+
+ tfp410_mod->gpio = of_get_named_gpio_flags(node, "powerdn-gpio",
+ 0, NULL);
+ if (IS_ERR_VALUE(tfp410_mod->gpio)) {
+ dev_warn(&pdev->dev, "No power down GPIO\n");
+ } else {
+ ret = gpio_request(tfp410_mod->gpio, "DVI_PDn");
+ if (ret) {
+ dev_err(&pdev->dev, "could not get DVI_PDn gpio\n");
+ goto fail;
+ }
+ }
+
+ return 0;
+
+fail:
+ tfp410_destroy(mod);
+ return ret;
+}
+
+static int tfp410_remove(struct platform_device *pdev)
+{
+ return 0;
+}
+
+static struct of_device_id tfp410_of_match[] = {
+ { .compatible = "ti,tilcdc,tfp410", },
+ { },
+};
+MODULE_DEVICE_TABLE(of, tfp410_of_match);
+
+struct platform_driver tfp410_driver = {
+ .probe = tfp410_probe,
+ .remove = tfp410_remove,
+ .driver = {
+ .owner = THIS_MODULE,
+ .name = "tfp410",
+ .of_match_table = tfp410_of_match,
+ },
+};
+
+int __init tilcdc_tfp410_init(void)
+{
+ return platform_driver_register(&tfp410_driver);
+}
+
+void __exit tilcdc_tfp410_fini(void)
+{
+ platform_driver_unregister(&tfp410_driver);
+}
diff --git a/drivers/gpu/drm/tilcdc/tilcdc_tfp410.h b/drivers/gpu/drm/tilcdc/tilcdc_tfp410.h
new file mode 100644
index 00000000000..5b800f1f6aa
--- /dev/null
+++ b/drivers/gpu/drm/tilcdc/tilcdc_tfp410.h
@@ -0,0 +1,26 @@
+/*
+ * Copyright (C) 2012 Texas Instruments
+ * Author: Rob Clark <robdclark@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published by
+ * the Free Software Foundation.
+ *
+ * This program is distributed in the hope that 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, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef __TILCDC_TFP410_H__
+#define __TILCDC_TFP410_H__
+
+/* sub-module for tfp410 dvi adaptor */
+
+int tilcdc_tfp410_init(void);
+void tilcdc_tfp410_fini(void);
+
+#endif /* __TILCDC_TFP410_H__ */
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-17 04:49:18 +0000