diff options
-rw-r--r-- | Documentation/devicetree/bindings/drm/tilcdc/tfp410.txt | 21 | ||||
-rw-r--r-- | Documentation/devicetree/bindings/drm/tilcdc/tilcdc.txt | 21 | ||||
-rw-r--r-- | drivers/gpu/drm/Kconfig | 2 | ||||
-rw-r--r-- | drivers/gpu/drm/Makefile | 1 | ||||
-rw-r--r-- | drivers/gpu/drm/tilcdc/Kconfig | 10 | ||||
-rw-r--r-- | drivers/gpu/drm/tilcdc/Makefile | 8 | ||||
-rw-r--r-- | drivers/gpu/drm/tilcdc/tilcdc_crtc.c | 602 | ||||
-rw-r--r-- | drivers/gpu/drm/tilcdc/tilcdc_drv.c | 605 | ||||
-rw-r--r-- | drivers/gpu/drm/tilcdc/tilcdc_drv.h | 150 | ||||
-rw-r--r-- | drivers/gpu/drm/tilcdc/tilcdc_regs.h | 154 | ||||
-rw-r--r-- | drivers/gpu/drm/tilcdc/tilcdc_tfp410.c | 419 | ||||
-rw-r--r-- | drivers/gpu/drm/tilcdc/tilcdc_tfp410.h | 26 |
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 0000000..a58ae77 --- /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 0000000..e5f1301 --- /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 ed9e3af..ba74e75 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 6f58c81..3af934d 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-$(CONFIG_DRM_TILCDC) += tilcdc/ obj-y += i2c/ diff --git a/drivers/gpu/drm/tilcdc/Kconfig b/drivers/gpu/drm/tilcdc/Kconfig new file mode 100644 index 0000000..ee9b592 --- /dev/null +++ b/drivers/gpu/drm/tilcdc/Kconfig @@ -0,0 +1,10 @@ +config DRM_TILCDC + tristate "DRM Support for TI LCDC Display Controller" + depends on DRM && OF + select DRM_KMS_HELPER + select DRM_KMS_CMA_HELPER + select DRM_GEM_CMA_HELPER + help + Choose this option if you have an TI SoC with LCDC display + controller, for example AM33xx in beagle-bone, DA8xx, or + OMAP-L1xx. This driver replaces the FB_DA8XX fbdev driver. diff --git a/drivers/gpu/drm/tilcdc/Makefile b/drivers/gpu/drm/tilcdc/Makefile new file mode 100644 index 0000000..1359cc2 --- /dev/null +++ b/drivers/gpu/drm/tilcdc/Makefile @@ -0,0 +1,8 @@ +ccflags-y := -Iinclude/drm -Werror + +tilcdc-y := \ + tilcdc_crtc.o \ + tilcdc_tfp410.o \ + tilcdc_drv.o + +obj-$(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 0000000..5dd3c7d --- /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 0000000..f6defbf --- /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 0000000..8242b5a --- /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 0000000..17fd1b4 --- /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 0000000..58d487b --- /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 0000000..5b800f1 --- /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__ */ |