diff options
Diffstat (limited to 'kernel/drivers/gpu/drm/tegra/dc.c')
| -rw-r--r-- | kernel/drivers/gpu/drm/tegra/dc.c | 2024 |
1 files changed, 2024 insertions, 0 deletions
diff --git a/kernel/drivers/gpu/drm/tegra/dc.c b/kernel/drivers/gpu/drm/tegra/dc.c new file mode 100644 index 000000000..a287e4fec --- /dev/null +++ b/kernel/drivers/gpu/drm/tegra/dc.c @@ -0,0 +1,2024 @@ +/* + * Copyright (C) 2012 Avionic Design GmbH + * Copyright (C) 2012 NVIDIA CORPORATION. All rights reserved. + * + * 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. + */ + +#include <linux/clk.h> +#include <linux/debugfs.h> +#include <linux/iommu.h> +#include <linux/reset.h> + +#include <soc/tegra/pmc.h> + +#include "dc.h" +#include "drm.h" +#include "gem.h" + +#include <drm/drm_atomic.h> +#include <drm/drm_atomic_helper.h> +#include <drm/drm_plane_helper.h> + +struct tegra_dc_soc_info { + bool supports_border_color; + bool supports_interlacing; + bool supports_cursor; + bool supports_block_linear; + unsigned int pitch_align; + bool has_powergate; +}; + +struct tegra_plane { + struct drm_plane base; + unsigned int index; +}; + +static inline struct tegra_plane *to_tegra_plane(struct drm_plane *plane) +{ + return container_of(plane, struct tegra_plane, base); +} + +struct tegra_dc_state { + struct drm_crtc_state base; + + struct clk *clk; + unsigned long pclk; + unsigned int div; + + u32 planes; +}; + +static inline struct tegra_dc_state *to_dc_state(struct drm_crtc_state *state) +{ + if (state) + return container_of(state, struct tegra_dc_state, base); + + return NULL; +} + +struct tegra_plane_state { + struct drm_plane_state base; + + struct tegra_bo_tiling tiling; + u32 format; + u32 swap; +}; + +static inline struct tegra_plane_state * +to_tegra_plane_state(struct drm_plane_state *state) +{ + if (state) + return container_of(state, struct tegra_plane_state, base); + + return NULL; +} + +/* + * Reads the active copy of a register. This takes the dc->lock spinlock to + * prevent races with the VBLANK processing which also needs access to the + * active copy of some registers. + */ +static u32 tegra_dc_readl_active(struct tegra_dc *dc, unsigned long offset) +{ + unsigned long flags; + u32 value; + + spin_lock_irqsave(&dc->lock, flags); + + tegra_dc_writel(dc, READ_MUX, DC_CMD_STATE_ACCESS); + value = tegra_dc_readl(dc, offset); + tegra_dc_writel(dc, 0, DC_CMD_STATE_ACCESS); + + spin_unlock_irqrestore(&dc->lock, flags); + return value; +} + +/* + * Double-buffered registers have two copies: ASSEMBLY and ACTIVE. When the + * *_ACT_REQ bits are set the ASSEMBLY copy is latched into the ACTIVE copy. + * Latching happens mmediately if the display controller is in STOP mode or + * on the next frame boundary otherwise. + * + * Triple-buffered registers have three copies: ASSEMBLY, ARM and ACTIVE. The + * ASSEMBLY copy is latched into the ARM copy immediately after *_UPDATE bits + * are written. When the *_ACT_REQ bits are written, the ARM copy is latched + * into the ACTIVE copy, either immediately if the display controller is in + * STOP mode, or at the next frame boundary otherwise. + */ +void tegra_dc_commit(struct tegra_dc *dc) +{ + tegra_dc_writel(dc, GENERAL_ACT_REQ << 8, DC_CMD_STATE_CONTROL); + tegra_dc_writel(dc, GENERAL_ACT_REQ, DC_CMD_STATE_CONTROL); +} + +static int tegra_dc_format(u32 fourcc, u32 *format, u32 *swap) +{ + /* assume no swapping of fetched data */ + if (swap) + *swap = BYTE_SWAP_NOSWAP; + + switch (fourcc) { + case DRM_FORMAT_XBGR8888: + *format = WIN_COLOR_DEPTH_R8G8B8A8; + break; + + case DRM_FORMAT_XRGB8888: + *format = WIN_COLOR_DEPTH_B8G8R8A8; + break; + + case DRM_FORMAT_RGB565: + *format = WIN_COLOR_DEPTH_B5G6R5; + break; + + case DRM_FORMAT_UYVY: + *format = WIN_COLOR_DEPTH_YCbCr422; + break; + + case DRM_FORMAT_YUYV: + if (swap) + *swap = BYTE_SWAP_SWAP2; + + *format = WIN_COLOR_DEPTH_YCbCr422; + break; + + case DRM_FORMAT_YUV420: + *format = WIN_COLOR_DEPTH_YCbCr420P; + break; + + case DRM_FORMAT_YUV422: + *format = WIN_COLOR_DEPTH_YCbCr422P; + break; + + default: + return -EINVAL; + } + + return 0; +} + +static bool tegra_dc_format_is_yuv(unsigned int format, bool *planar) +{ + switch (format) { + case WIN_COLOR_DEPTH_YCbCr422: + case WIN_COLOR_DEPTH_YUV422: + if (planar) + *planar = false; + + return true; + + case WIN_COLOR_DEPTH_YCbCr420P: + case WIN_COLOR_DEPTH_YUV420P: + case WIN_COLOR_DEPTH_YCbCr422P: + case WIN_COLOR_DEPTH_YUV422P: + case WIN_COLOR_DEPTH_YCbCr422R: + case WIN_COLOR_DEPTH_YUV422R: + case WIN_COLOR_DEPTH_YCbCr422RA: + case WIN_COLOR_DEPTH_YUV422RA: + if (planar) + *planar = true; + + return true; + } + + if (planar) + *planar = false; + + return false; +} + +static inline u32 compute_dda_inc(unsigned int in, unsigned int out, bool v, + unsigned int bpp) +{ + fixed20_12 outf = dfixed_init(out); + fixed20_12 inf = dfixed_init(in); + u32 dda_inc; + int max; + + if (v) + max = 15; + else { + switch (bpp) { + case 2: + max = 8; + break; + + default: + WARN_ON_ONCE(1); + /* fallthrough */ + case 4: + max = 4; + break; + } + } + + outf.full = max_t(u32, outf.full - dfixed_const(1), dfixed_const(1)); + inf.full -= dfixed_const(1); + + dda_inc = dfixed_div(inf, outf); + dda_inc = min_t(u32, dda_inc, dfixed_const(max)); + + return dda_inc; +} + +static inline u32 compute_initial_dda(unsigned int in) +{ + fixed20_12 inf = dfixed_init(in); + return dfixed_frac(inf); +} + +static void tegra_dc_setup_window(struct tegra_dc *dc, unsigned int index, + const struct tegra_dc_window *window) +{ + unsigned h_offset, v_offset, h_size, v_size, h_dda, v_dda, bpp; + unsigned long value, flags; + bool yuv, planar; + + /* + * For YUV planar modes, the number of bytes per pixel takes into + * account only the luma component and therefore is 1. + */ + yuv = tegra_dc_format_is_yuv(window->format, &planar); + if (!yuv) + bpp = window->bits_per_pixel / 8; + else + bpp = planar ? 1 : 2; + + spin_lock_irqsave(&dc->lock, flags); + + value = WINDOW_A_SELECT << index; + tegra_dc_writel(dc, value, DC_CMD_DISPLAY_WINDOW_HEADER); + + tegra_dc_writel(dc, window->format, DC_WIN_COLOR_DEPTH); + tegra_dc_writel(dc, window->swap, DC_WIN_BYTE_SWAP); + + value = V_POSITION(window->dst.y) | H_POSITION(window->dst.x); + tegra_dc_writel(dc, value, DC_WIN_POSITION); + + value = V_SIZE(window->dst.h) | H_SIZE(window->dst.w); + tegra_dc_writel(dc, value, DC_WIN_SIZE); + + h_offset = window->src.x * bpp; + v_offset = window->src.y; + h_size = window->src.w * bpp; + v_size = window->src.h; + + value = V_PRESCALED_SIZE(v_size) | H_PRESCALED_SIZE(h_size); + tegra_dc_writel(dc, value, DC_WIN_PRESCALED_SIZE); + + /* + * For DDA computations the number of bytes per pixel for YUV planar + * modes needs to take into account all Y, U and V components. + */ + if (yuv && planar) + bpp = 2; + + h_dda = compute_dda_inc(window->src.w, window->dst.w, false, bpp); + v_dda = compute_dda_inc(window->src.h, window->dst.h, true, bpp); + + value = V_DDA_INC(v_dda) | H_DDA_INC(h_dda); + tegra_dc_writel(dc, value, DC_WIN_DDA_INC); + + h_dda = compute_initial_dda(window->src.x); + v_dda = compute_initial_dda(window->src.y); + + tegra_dc_writel(dc, h_dda, DC_WIN_H_INITIAL_DDA); + tegra_dc_writel(dc, v_dda, DC_WIN_V_INITIAL_DDA); + + tegra_dc_writel(dc, 0, DC_WIN_UV_BUF_STRIDE); + tegra_dc_writel(dc, 0, DC_WIN_BUF_STRIDE); + + tegra_dc_writel(dc, window->base[0], DC_WINBUF_START_ADDR); + + if (yuv && planar) { + tegra_dc_writel(dc, window->base[1], DC_WINBUF_START_ADDR_U); + tegra_dc_writel(dc, window->base[2], DC_WINBUF_START_ADDR_V); + value = window->stride[1] << 16 | window->stride[0]; + tegra_dc_writel(dc, value, DC_WIN_LINE_STRIDE); + } else { + tegra_dc_writel(dc, window->stride[0], DC_WIN_LINE_STRIDE); + } + + if (window->bottom_up) + v_offset += window->src.h - 1; + + tegra_dc_writel(dc, h_offset, DC_WINBUF_ADDR_H_OFFSET); + tegra_dc_writel(dc, v_offset, DC_WINBUF_ADDR_V_OFFSET); + + if (dc->soc->supports_block_linear) { + unsigned long height = window->tiling.value; + + switch (window->tiling.mode) { + case TEGRA_BO_TILING_MODE_PITCH: + value = DC_WINBUF_SURFACE_KIND_PITCH; + break; + + case TEGRA_BO_TILING_MODE_TILED: + value = DC_WINBUF_SURFACE_KIND_TILED; + break; + + case TEGRA_BO_TILING_MODE_BLOCK: + value = DC_WINBUF_SURFACE_KIND_BLOCK_HEIGHT(height) | + DC_WINBUF_SURFACE_KIND_BLOCK; + break; + } + + tegra_dc_writel(dc, value, DC_WINBUF_SURFACE_KIND); + } else { + switch (window->tiling.mode) { + case TEGRA_BO_TILING_MODE_PITCH: + value = DC_WIN_BUFFER_ADDR_MODE_LINEAR_UV | + DC_WIN_BUFFER_ADDR_MODE_LINEAR; + break; + + case TEGRA_BO_TILING_MODE_TILED: + value = DC_WIN_BUFFER_ADDR_MODE_TILE_UV | + DC_WIN_BUFFER_ADDR_MODE_TILE; + break; + + case TEGRA_BO_TILING_MODE_BLOCK: + /* + * No need to handle this here because ->atomic_check + * will already have filtered it out. + */ + break; + } + + tegra_dc_writel(dc, value, DC_WIN_BUFFER_ADDR_MODE); + } + + value = WIN_ENABLE; + + if (yuv) { + /* setup default colorspace conversion coefficients */ + tegra_dc_writel(dc, 0x00f0, DC_WIN_CSC_YOF); + tegra_dc_writel(dc, 0x012a, DC_WIN_CSC_KYRGB); + tegra_dc_writel(dc, 0x0000, DC_WIN_CSC_KUR); + tegra_dc_writel(dc, 0x0198, DC_WIN_CSC_KVR); + tegra_dc_writel(dc, 0x039b, DC_WIN_CSC_KUG); + tegra_dc_writel(dc, 0x032f, DC_WIN_CSC_KVG); + tegra_dc_writel(dc, 0x0204, DC_WIN_CSC_KUB); + tegra_dc_writel(dc, 0x0000, DC_WIN_CSC_KVB); + + value |= CSC_ENABLE; + } else if (window->bits_per_pixel < 24) { + value |= COLOR_EXPAND; + } + + if (window->bottom_up) + value |= V_DIRECTION; + + tegra_dc_writel(dc, value, DC_WIN_WIN_OPTIONS); + + /* + * Disable blending and assume Window A is the bottom-most window, + * Window C is the top-most window and Window B is in the middle. + */ + tegra_dc_writel(dc, 0xffff00, DC_WIN_BLEND_NOKEY); + tegra_dc_writel(dc, 0xffff00, DC_WIN_BLEND_1WIN); + + switch (index) { + case 0: + tegra_dc_writel(dc, 0x000000, DC_WIN_BLEND_2WIN_X); + tegra_dc_writel(dc, 0x000000, DC_WIN_BLEND_2WIN_Y); + tegra_dc_writel(dc, 0x000000, DC_WIN_BLEND_3WIN_XY); + break; + + case 1: + tegra_dc_writel(dc, 0xffff00, DC_WIN_BLEND_2WIN_X); + tegra_dc_writel(dc, 0x000000, DC_WIN_BLEND_2WIN_Y); + tegra_dc_writel(dc, 0x000000, DC_WIN_BLEND_3WIN_XY); + break; + + case 2: + tegra_dc_writel(dc, 0xffff00, DC_WIN_BLEND_2WIN_X); + tegra_dc_writel(dc, 0xffff00, DC_WIN_BLEND_2WIN_Y); + tegra_dc_writel(dc, 0xffff00, DC_WIN_BLEND_3WIN_XY); + break; + } + + spin_unlock_irqrestore(&dc->lock, flags); +} + +static void tegra_plane_destroy(struct drm_plane *plane) +{ + struct tegra_plane *p = to_tegra_plane(plane); + + drm_plane_cleanup(plane); + kfree(p); +} + +static const u32 tegra_primary_plane_formats[] = { + DRM_FORMAT_XBGR8888, + DRM_FORMAT_XRGB8888, + DRM_FORMAT_RGB565, +}; + +static void tegra_primary_plane_destroy(struct drm_plane *plane) +{ + tegra_plane_destroy(plane); +} + +static void tegra_plane_reset(struct drm_plane *plane) +{ + struct tegra_plane_state *state; + + if (plane->state) + __drm_atomic_helper_plane_destroy_state(plane, plane->state); + + kfree(plane->state); + plane->state = NULL; + + state = kzalloc(sizeof(*state), GFP_KERNEL); + if (state) { + plane->state = &state->base; + plane->state->plane = plane; + } +} + +static struct drm_plane_state *tegra_plane_atomic_duplicate_state(struct drm_plane *plane) +{ + struct tegra_plane_state *state = to_tegra_plane_state(plane->state); + struct tegra_plane_state *copy; + + copy = kmalloc(sizeof(*copy), GFP_KERNEL); + if (!copy) + return NULL; + + __drm_atomic_helper_plane_duplicate_state(plane, ©->base); + copy->tiling = state->tiling; + copy->format = state->format; + copy->swap = state->swap; + + return ©->base; +} + +static void tegra_plane_atomic_destroy_state(struct drm_plane *plane, + struct drm_plane_state *state) +{ + __drm_atomic_helper_plane_destroy_state(plane, state); + kfree(state); +} + +static const struct drm_plane_funcs tegra_primary_plane_funcs = { + .update_plane = drm_atomic_helper_update_plane, + .disable_plane = drm_atomic_helper_disable_plane, + .destroy = tegra_primary_plane_destroy, + .reset = tegra_plane_reset, + .atomic_duplicate_state = tegra_plane_atomic_duplicate_state, + .atomic_destroy_state = tegra_plane_atomic_destroy_state, +}; + +static int tegra_plane_prepare_fb(struct drm_plane *plane, + struct drm_framebuffer *fb, + const struct drm_plane_state *new_state) +{ + return 0; +} + +static void tegra_plane_cleanup_fb(struct drm_plane *plane, + struct drm_framebuffer *fb, + const struct drm_plane_state *old_fb) +{ +} + +static int tegra_plane_state_add(struct tegra_plane *plane, + struct drm_plane_state *state) +{ + struct drm_crtc_state *crtc_state; + struct tegra_dc_state *tegra; + + /* Propagate errors from allocation or locking failures. */ + crtc_state = drm_atomic_get_crtc_state(state->state, state->crtc); + if (IS_ERR(crtc_state)) + return PTR_ERR(crtc_state); + + tegra = to_dc_state(crtc_state); + + tegra->planes |= WIN_A_ACT_REQ << plane->index; + + return 0; +} + +static int tegra_plane_atomic_check(struct drm_plane *plane, + struct drm_plane_state *state) +{ + struct tegra_plane_state *plane_state = to_tegra_plane_state(state); + struct tegra_bo_tiling *tiling = &plane_state->tiling; + struct tegra_plane *tegra = to_tegra_plane(plane); + struct tegra_dc *dc = to_tegra_dc(state->crtc); + int err; + + /* no need for further checks if the plane is being disabled */ + if (!state->crtc) + return 0; + + err = tegra_dc_format(state->fb->pixel_format, &plane_state->format, + &plane_state->swap); + if (err < 0) + return err; + + err = tegra_fb_get_tiling(state->fb, tiling); + if (err < 0) + return err; + + if (tiling->mode == TEGRA_BO_TILING_MODE_BLOCK && + !dc->soc->supports_block_linear) { + DRM_ERROR("hardware doesn't support block linear mode\n"); + return -EINVAL; + } + + /* + * Tegra doesn't support different strides for U and V planes so we + * error out if the user tries to display a framebuffer with such a + * configuration. + */ + if (drm_format_num_planes(state->fb->pixel_format) > 2) { + if (state->fb->pitches[2] != state->fb->pitches[1]) { + DRM_ERROR("unsupported UV-plane configuration\n"); + return -EINVAL; + } + } + + err = tegra_plane_state_add(tegra, state); + if (err < 0) + return err; + + return 0; +} + +static void tegra_plane_atomic_update(struct drm_plane *plane, + struct drm_plane_state *old_state) +{ + struct tegra_plane_state *state = to_tegra_plane_state(plane->state); + struct tegra_dc *dc = to_tegra_dc(plane->state->crtc); + struct drm_framebuffer *fb = plane->state->fb; + struct tegra_plane *p = to_tegra_plane(plane); + struct tegra_dc_window window; + unsigned int i; + + /* rien ne va plus */ + if (!plane->state->crtc || !plane->state->fb) + return; + + memset(&window, 0, sizeof(window)); + window.src.x = plane->state->src_x >> 16; + window.src.y = plane->state->src_y >> 16; + window.src.w = plane->state->src_w >> 16; + window.src.h = plane->state->src_h >> 16; + window.dst.x = plane->state->crtc_x; + window.dst.y = plane->state->crtc_y; + window.dst.w = plane->state->crtc_w; + window.dst.h = plane->state->crtc_h; + window.bits_per_pixel = fb->bits_per_pixel; + window.bottom_up = tegra_fb_is_bottom_up(fb); + + /* copy from state */ + window.tiling = state->tiling; + window.format = state->format; + window.swap = state->swap; + + for (i = 0; i < drm_format_num_planes(fb->pixel_format); i++) { + struct tegra_bo *bo = tegra_fb_get_plane(fb, i); + + window.base[i] = bo->paddr + fb->offsets[i]; + window.stride[i] = fb->pitches[i]; + } + + tegra_dc_setup_window(dc, p->index, &window); +} + +static void tegra_plane_atomic_disable(struct drm_plane *plane, + struct drm_plane_state *old_state) +{ + struct tegra_plane *p = to_tegra_plane(plane); + struct tegra_dc *dc; + unsigned long flags; + u32 value; + + /* rien ne va plus */ + if (!old_state || !old_state->crtc) + return; + + dc = to_tegra_dc(old_state->crtc); + + spin_lock_irqsave(&dc->lock, flags); + + value = WINDOW_A_SELECT << p->index; + tegra_dc_writel(dc, value, DC_CMD_DISPLAY_WINDOW_HEADER); + + value = tegra_dc_readl(dc, DC_WIN_WIN_OPTIONS); + value &= ~WIN_ENABLE; + tegra_dc_writel(dc, value, DC_WIN_WIN_OPTIONS); + + spin_unlock_irqrestore(&dc->lock, flags); +} + +static const struct drm_plane_helper_funcs tegra_primary_plane_helper_funcs = { + .prepare_fb = tegra_plane_prepare_fb, + .cleanup_fb = tegra_plane_cleanup_fb, + .atomic_check = tegra_plane_atomic_check, + .atomic_update = tegra_plane_atomic_update, + .atomic_disable = tegra_plane_atomic_disable, +}; + +static struct drm_plane *tegra_dc_primary_plane_create(struct drm_device *drm, + struct tegra_dc *dc) +{ + /* + * Ideally this would use drm_crtc_mask(), but that would require the + * CRTC to already be in the mode_config's list of CRTCs. However, it + * will only be added to that list in the drm_crtc_init_with_planes() + * (in tegra_dc_init()), which in turn requires registration of these + * planes. So we have ourselves a nice little chicken and egg problem + * here. + * + * We work around this by manually creating the mask from the number + * of CRTCs that have been registered, and should therefore always be + * the same as drm_crtc_index() after registration. + */ + unsigned long possible_crtcs = 1 << drm->mode_config.num_crtc; + struct tegra_plane *plane; + unsigned int num_formats; + const u32 *formats; + int err; + + plane = kzalloc(sizeof(*plane), GFP_KERNEL); + if (!plane) + return ERR_PTR(-ENOMEM); + + num_formats = ARRAY_SIZE(tegra_primary_plane_formats); + formats = tegra_primary_plane_formats; + + err = drm_universal_plane_init(drm, &plane->base, possible_crtcs, + &tegra_primary_plane_funcs, formats, + num_formats, DRM_PLANE_TYPE_PRIMARY); + if (err < 0) { + kfree(plane); + return ERR_PTR(err); + } + + drm_plane_helper_add(&plane->base, &tegra_primary_plane_helper_funcs); + + return &plane->base; +} + +static const u32 tegra_cursor_plane_formats[] = { + DRM_FORMAT_RGBA8888, +}; + +static int tegra_cursor_atomic_check(struct drm_plane *plane, + struct drm_plane_state *state) +{ + struct tegra_plane *tegra = to_tegra_plane(plane); + int err; + + /* no need for further checks if the plane is being disabled */ + if (!state->crtc) + return 0; + + /* scaling not supported for cursor */ + if ((state->src_w >> 16 != state->crtc_w) || + (state->src_h >> 16 != state->crtc_h)) + return -EINVAL; + + /* only square cursors supported */ + if (state->src_w != state->src_h) + return -EINVAL; + + if (state->crtc_w != 32 && state->crtc_w != 64 && + state->crtc_w != 128 && state->crtc_w != 256) + return -EINVAL; + + err = tegra_plane_state_add(tegra, state); + if (err < 0) + return err; + + return 0; +} + +static void tegra_cursor_atomic_update(struct drm_plane *plane, + struct drm_plane_state *old_state) +{ + struct tegra_bo *bo = tegra_fb_get_plane(plane->state->fb, 0); + struct tegra_dc *dc = to_tegra_dc(plane->state->crtc); + struct drm_plane_state *state = plane->state; + u32 value = CURSOR_CLIP_DISPLAY; + + /* rien ne va plus */ + if (!plane->state->crtc || !plane->state->fb) + return; + + switch (state->crtc_w) { + case 32: + value |= CURSOR_SIZE_32x32; + break; + + case 64: + value |= CURSOR_SIZE_64x64; + break; + + case 128: + value |= CURSOR_SIZE_128x128; + break; + + case 256: + value |= CURSOR_SIZE_256x256; + break; + + default: + WARN(1, "cursor size %ux%u not supported\n", state->crtc_w, + state->crtc_h); + return; + } + + value |= (bo->paddr >> 10) & 0x3fffff; + tegra_dc_writel(dc, value, DC_DISP_CURSOR_START_ADDR); + +#ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT + value = (bo->paddr >> 32) & 0x3; + tegra_dc_writel(dc, value, DC_DISP_CURSOR_START_ADDR_HI); +#endif + + /* enable cursor and set blend mode */ + value = tegra_dc_readl(dc, DC_DISP_DISP_WIN_OPTIONS); + value |= CURSOR_ENABLE; + tegra_dc_writel(dc, value, DC_DISP_DISP_WIN_OPTIONS); + + value = tegra_dc_readl(dc, DC_DISP_BLEND_CURSOR_CONTROL); + value &= ~CURSOR_DST_BLEND_MASK; + value &= ~CURSOR_SRC_BLEND_MASK; + value |= CURSOR_MODE_NORMAL; + value |= CURSOR_DST_BLEND_NEG_K1_TIMES_SRC; + value |= CURSOR_SRC_BLEND_K1_TIMES_SRC; + value |= CURSOR_ALPHA; + tegra_dc_writel(dc, value, DC_DISP_BLEND_CURSOR_CONTROL); + + /* position the cursor */ + value = (state->crtc_y & 0x3fff) << 16 | (state->crtc_x & 0x3fff); + tegra_dc_writel(dc, value, DC_DISP_CURSOR_POSITION); + +} + +static void tegra_cursor_atomic_disable(struct drm_plane *plane, + struct drm_plane_state *old_state) +{ + struct tegra_dc *dc; + u32 value; + + /* rien ne va plus */ + if (!old_state || !old_state->crtc) + return; + + dc = to_tegra_dc(old_state->crtc); + + value = tegra_dc_readl(dc, DC_DISP_DISP_WIN_OPTIONS); + value &= ~CURSOR_ENABLE; + tegra_dc_writel(dc, value, DC_DISP_DISP_WIN_OPTIONS); +} + +static const struct drm_plane_funcs tegra_cursor_plane_funcs = { + .update_plane = drm_atomic_helper_update_plane, + .disable_plane = drm_atomic_helper_disable_plane, + .destroy = tegra_plane_destroy, + .reset = tegra_plane_reset, + .atomic_duplicate_state = tegra_plane_atomic_duplicate_state, + .atomic_destroy_state = tegra_plane_atomic_destroy_state, +}; + +static const struct drm_plane_helper_funcs tegra_cursor_plane_helper_funcs = { + .prepare_fb = tegra_plane_prepare_fb, + .cleanup_fb = tegra_plane_cleanup_fb, + .atomic_check = tegra_cursor_atomic_check, + .atomic_update = tegra_cursor_atomic_update, + .atomic_disable = tegra_cursor_atomic_disable, +}; + +static struct drm_plane *tegra_dc_cursor_plane_create(struct drm_device *drm, + struct tegra_dc *dc) +{ + struct tegra_plane *plane; + unsigned int num_formats; + const u32 *formats; + int err; + + plane = kzalloc(sizeof(*plane), GFP_KERNEL); + if (!plane) + return ERR_PTR(-ENOMEM); + + /* + * We'll treat the cursor as an overlay plane with index 6 here so + * that the update and activation request bits in DC_CMD_STATE_CONTROL + * match up. + */ + plane->index = 6; + + num_formats = ARRAY_SIZE(tegra_cursor_plane_formats); + formats = tegra_cursor_plane_formats; + + err = drm_universal_plane_init(drm, &plane->base, 1 << dc->pipe, + &tegra_cursor_plane_funcs, formats, + num_formats, DRM_PLANE_TYPE_CURSOR); + if (err < 0) { + kfree(plane); + return ERR_PTR(err); + } + + drm_plane_helper_add(&plane->base, &tegra_cursor_plane_helper_funcs); + + return &plane->base; +} + +static void tegra_overlay_plane_destroy(struct drm_plane *plane) +{ + tegra_plane_destroy(plane); +} + +static const struct drm_plane_funcs tegra_overlay_plane_funcs = { + .update_plane = drm_atomic_helper_update_plane, + .disable_plane = drm_atomic_helper_disable_plane, + .destroy = tegra_overlay_plane_destroy, + .reset = tegra_plane_reset, + .atomic_duplicate_state = tegra_plane_atomic_duplicate_state, + .atomic_destroy_state = tegra_plane_atomic_destroy_state, +}; + +static const uint32_t tegra_overlay_plane_formats[] = { + DRM_FORMAT_XBGR8888, + DRM_FORMAT_XRGB8888, + DRM_FORMAT_RGB565, + DRM_FORMAT_UYVY, + DRM_FORMAT_YUYV, + DRM_FORMAT_YUV420, + DRM_FORMAT_YUV422, +}; + +static const struct drm_plane_helper_funcs tegra_overlay_plane_helper_funcs = { + .prepare_fb = tegra_plane_prepare_fb, + .cleanup_fb = tegra_plane_cleanup_fb, + .atomic_check = tegra_plane_atomic_check, + .atomic_update = tegra_plane_atomic_update, + .atomic_disable = tegra_plane_atomic_disable, +}; + +static struct drm_plane *tegra_dc_overlay_plane_create(struct drm_device *drm, + struct tegra_dc *dc, + unsigned int index) +{ + struct tegra_plane *plane; + unsigned int num_formats; + const u32 *formats; + int err; + + plane = kzalloc(sizeof(*plane), GFP_KERNEL); + if (!plane) + return ERR_PTR(-ENOMEM); + + plane->index = index; + + num_formats = ARRAY_SIZE(tegra_overlay_plane_formats); + formats = tegra_overlay_plane_formats; + + err = drm_universal_plane_init(drm, &plane->base, 1 << dc->pipe, + &tegra_overlay_plane_funcs, formats, + num_formats, DRM_PLANE_TYPE_OVERLAY); + if (err < 0) { + kfree(plane); + return ERR_PTR(err); + } + + drm_plane_helper_add(&plane->base, &tegra_overlay_plane_helper_funcs); + + return &plane->base; +} + +static int tegra_dc_add_planes(struct drm_device *drm, struct tegra_dc *dc) +{ + struct drm_plane *plane; + unsigned int i; + + for (i = 0; i < 2; i++) { + plane = tegra_dc_overlay_plane_create(drm, dc, 1 + i); + if (IS_ERR(plane)) + return PTR_ERR(plane); + } + + return 0; +} + +u32 tegra_dc_get_vblank_counter(struct tegra_dc *dc) +{ + if (dc->syncpt) + return host1x_syncpt_read(dc->syncpt); + + /* fallback to software emulated VBLANK counter */ + return drm_crtc_vblank_count(&dc->base); +} + +void tegra_dc_enable_vblank(struct tegra_dc *dc) +{ + unsigned long value, flags; + + spin_lock_irqsave(&dc->lock, flags); + + value = tegra_dc_readl(dc, DC_CMD_INT_MASK); + value |= VBLANK_INT; + tegra_dc_writel(dc, value, DC_CMD_INT_MASK); + + spin_unlock_irqrestore(&dc->lock, flags); +} + +void tegra_dc_disable_vblank(struct tegra_dc *dc) +{ + unsigned long value, flags; + + spin_lock_irqsave(&dc->lock, flags); + + value = tegra_dc_readl(dc, DC_CMD_INT_MASK); + value &= ~VBLANK_INT; + tegra_dc_writel(dc, value, DC_CMD_INT_MASK); + + spin_unlock_irqrestore(&dc->lock, flags); +} + +static void tegra_dc_finish_page_flip(struct tegra_dc *dc) +{ + struct drm_device *drm = dc->base.dev; + struct drm_crtc *crtc = &dc->base; + unsigned long flags, base; + struct tegra_bo *bo; + + spin_lock_irqsave(&drm->event_lock, flags); + + if (!dc->event) { + spin_unlock_irqrestore(&drm->event_lock, flags); + return; + } + + bo = tegra_fb_get_plane(crtc->primary->fb, 0); + + spin_lock(&dc->lock); + + /* check if new start address has been latched */ + tegra_dc_writel(dc, WINDOW_A_SELECT, DC_CMD_DISPLAY_WINDOW_HEADER); + tegra_dc_writel(dc, READ_MUX, DC_CMD_STATE_ACCESS); + base = tegra_dc_readl(dc, DC_WINBUF_START_ADDR); + tegra_dc_writel(dc, 0, DC_CMD_STATE_ACCESS); + + spin_unlock(&dc->lock); + + if (base == bo->paddr + crtc->primary->fb->offsets[0]) { + drm_crtc_send_vblank_event(crtc, dc->event); + drm_crtc_vblank_put(crtc); + dc->event = NULL; + } + + spin_unlock_irqrestore(&drm->event_lock, flags); +} + +void tegra_dc_cancel_page_flip(struct drm_crtc *crtc, struct drm_file *file) +{ + struct tegra_dc *dc = to_tegra_dc(crtc); + struct drm_device *drm = crtc->dev; + unsigned long flags; + + spin_lock_irqsave(&drm->event_lock, flags); + + if (dc->event && dc->event->base.file_priv == file) { + dc->event->base.destroy(&dc->event->base); + drm_crtc_vblank_put(crtc); + dc->event = NULL; + } + + spin_unlock_irqrestore(&drm->event_lock, flags); +} + +static void tegra_dc_destroy(struct drm_crtc *crtc) +{ + drm_crtc_cleanup(crtc); +} + +static void tegra_crtc_reset(struct drm_crtc *crtc) +{ + struct tegra_dc_state *state; + + if (crtc->state) + __drm_atomic_helper_crtc_destroy_state(crtc, crtc->state); + + kfree(crtc->state); + crtc->state = NULL; + + state = kzalloc(sizeof(*state), GFP_KERNEL); + if (state) { + crtc->state = &state->base; + crtc->state->crtc = crtc; + } +} + +static struct drm_crtc_state * +tegra_crtc_atomic_duplicate_state(struct drm_crtc *crtc) +{ + struct tegra_dc_state *state = to_dc_state(crtc->state); + struct tegra_dc_state *copy; + + copy = kmalloc(sizeof(*copy), GFP_KERNEL); + if (!copy) + return NULL; + + __drm_atomic_helper_crtc_duplicate_state(crtc, ©->base); + copy->clk = state->clk; + copy->pclk = state->pclk; + copy->div = state->div; + copy->planes = state->planes; + + return ©->base; +} + +static void tegra_crtc_atomic_destroy_state(struct drm_crtc *crtc, + struct drm_crtc_state *state) +{ + __drm_atomic_helper_crtc_destroy_state(crtc, state); + kfree(state); +} + +static const struct drm_crtc_funcs tegra_crtc_funcs = { + .page_flip = drm_atomic_helper_page_flip, + .set_config = drm_atomic_helper_set_config, + .destroy = tegra_dc_destroy, + .reset = tegra_crtc_reset, + .atomic_duplicate_state = tegra_crtc_atomic_duplicate_state, + .atomic_destroy_state = tegra_crtc_atomic_destroy_state, +}; + +static void tegra_dc_stop(struct tegra_dc *dc) +{ + u32 value; + + /* stop the display controller */ + value = tegra_dc_readl(dc, DC_CMD_DISPLAY_COMMAND); + value &= ~DISP_CTRL_MODE_MASK; + tegra_dc_writel(dc, value, DC_CMD_DISPLAY_COMMAND); + + tegra_dc_commit(dc); +} + +static bool tegra_dc_idle(struct tegra_dc *dc) +{ + u32 value; + + value = tegra_dc_readl_active(dc, DC_CMD_DISPLAY_COMMAND); + + return (value & DISP_CTRL_MODE_MASK) == 0; +} + +static int tegra_dc_wait_idle(struct tegra_dc *dc, unsigned long timeout) +{ + timeout = jiffies + msecs_to_jiffies(timeout); + + while (time_before(jiffies, timeout)) { + if (tegra_dc_idle(dc)) + return 0; + + usleep_range(1000, 2000); + } + + dev_dbg(dc->dev, "timeout waiting for DC to become idle\n"); + return -ETIMEDOUT; +} + +static void tegra_crtc_disable(struct drm_crtc *crtc) +{ + struct tegra_dc *dc = to_tegra_dc(crtc); + u32 value; + + if (!tegra_dc_idle(dc)) { + tegra_dc_stop(dc); + + /* + * Ignore the return value, there isn't anything useful to do + * in case this fails. + */ + tegra_dc_wait_idle(dc, 100); + } + + /* + * This should really be part of the RGB encoder driver, but clearing + * these bits has the side-effect of stopping the display controller. + * When that happens no VBLANK interrupts will be raised. At the same + * time the encoder is disabled before the display controller, so the + * above code is always going to timeout waiting for the controller + * to go idle. + * + * Given the close coupling between the RGB encoder and the display + * controller doing it here is still kind of okay. None of the other + * encoder drivers require these bits to be cleared. + * + * XXX: Perhaps given that the display controller is switched off at + * this point anyway maybe clearing these bits isn't even useful for + * the RGB encoder? + */ + if (dc->rgb) { + value = tegra_dc_readl(dc, DC_CMD_DISPLAY_POWER_CONTROL); + value &= ~(PW0_ENABLE | PW1_ENABLE | PW2_ENABLE | PW3_ENABLE | + PW4_ENABLE | PM0_ENABLE | PM1_ENABLE); + tegra_dc_writel(dc, value, DC_CMD_DISPLAY_POWER_CONTROL); + } + + drm_crtc_vblank_off(crtc); +} + +static bool tegra_crtc_mode_fixup(struct drm_crtc *crtc, + const struct drm_display_mode *mode, + struct drm_display_mode *adjusted) +{ + return true; +} + +static int tegra_dc_set_timings(struct tegra_dc *dc, + struct drm_display_mode *mode) +{ + unsigned int h_ref_to_sync = 1; + unsigned int v_ref_to_sync = 1; + unsigned long value; + + tegra_dc_writel(dc, 0x0, DC_DISP_DISP_TIMING_OPTIONS); + + value = (v_ref_to_sync << 16) | h_ref_to_sync; + tegra_dc_writel(dc, value, DC_DISP_REF_TO_SYNC); + + value = ((mode->vsync_end - mode->vsync_start) << 16) | + ((mode->hsync_end - mode->hsync_start) << 0); + tegra_dc_writel(dc, value, DC_DISP_SYNC_WIDTH); + + value = ((mode->vtotal - mode->vsync_end) << 16) | + ((mode->htotal - mode->hsync_end) << 0); + tegra_dc_writel(dc, value, DC_DISP_BACK_PORCH); + + value = ((mode->vsync_start - mode->vdisplay) << 16) | + ((mode->hsync_start - mode->hdisplay) << 0); + tegra_dc_writel(dc, value, DC_DISP_FRONT_PORCH); + + value = (mode->vdisplay << 16) | mode->hdisplay; + tegra_dc_writel(dc, value, DC_DISP_ACTIVE); + + return 0; +} + +/** + * tegra_dc_state_setup_clock - check clock settings and store them in atomic + * state + * @dc: display controller + * @crtc_state: CRTC atomic state + * @clk: parent clock for display controller + * @pclk: pixel clock + * @div: shift clock divider + * + * Returns: + * 0 on success or a negative error-code on failure. + */ +int tegra_dc_state_setup_clock(struct tegra_dc *dc, + struct drm_crtc_state *crtc_state, + struct clk *clk, unsigned long pclk, + unsigned int div) +{ + struct tegra_dc_state *state = to_dc_state(crtc_state); + + if (!clk_has_parent(dc->clk, clk)) + return -EINVAL; + + state->clk = clk; + state->pclk = pclk; + state->div = div; + + return 0; +} + +static void tegra_dc_commit_state(struct tegra_dc *dc, + struct tegra_dc_state *state) +{ + u32 value; + int err; + + err = clk_set_parent(dc->clk, state->clk); + if (err < 0) + dev_err(dc->dev, "failed to set parent clock: %d\n", err); + + /* + * Outputs may not want to change the parent clock rate. This is only + * relevant to Tegra20 where only a single display PLL is available. + * Since that PLL would typically be used for HDMI, an internal LVDS + * panel would need to be driven by some other clock such as PLL_P + * which is shared with other peripherals. Changing the clock rate + * should therefore be avoided. + */ + if (state->pclk > 0) { + err = clk_set_rate(state->clk, state->pclk); + if (err < 0) + dev_err(dc->dev, + "failed to set clock rate to %lu Hz\n", + state->pclk); + } + + DRM_DEBUG_KMS("rate: %lu, div: %u\n", clk_get_rate(dc->clk), + state->div); + DRM_DEBUG_KMS("pclk: %lu\n", state->pclk); + + value = SHIFT_CLK_DIVIDER(state->div) | PIXEL_CLK_DIVIDER_PCD1; + tegra_dc_writel(dc, value, DC_DISP_DISP_CLOCK_CONTROL); +} + +static void tegra_crtc_mode_set_nofb(struct drm_crtc *crtc) +{ + struct drm_display_mode *mode = &crtc->state->adjusted_mode; + struct tegra_dc_state *state = to_dc_state(crtc->state); + struct tegra_dc *dc = to_tegra_dc(crtc); + u32 value; + + tegra_dc_commit_state(dc, state); + + /* program display mode */ + tegra_dc_set_timings(dc, mode); + + /* interlacing isn't supported yet, so disable it */ + if (dc->soc->supports_interlacing) { + value = tegra_dc_readl(dc, DC_DISP_INTERLACE_CONTROL); + value &= ~INTERLACE_ENABLE; + tegra_dc_writel(dc, value, DC_DISP_INTERLACE_CONTROL); + } + + value = tegra_dc_readl(dc, DC_CMD_DISPLAY_COMMAND); + value &= ~DISP_CTRL_MODE_MASK; + value |= DISP_CTRL_MODE_C_DISPLAY; + tegra_dc_writel(dc, value, DC_CMD_DISPLAY_COMMAND); + + value = tegra_dc_readl(dc, DC_CMD_DISPLAY_POWER_CONTROL); + value |= PW0_ENABLE | PW1_ENABLE | PW2_ENABLE | PW3_ENABLE | + PW4_ENABLE | PM0_ENABLE | PM1_ENABLE; + tegra_dc_writel(dc, value, DC_CMD_DISPLAY_POWER_CONTROL); + + tegra_dc_commit(dc); +} + +static void tegra_crtc_prepare(struct drm_crtc *crtc) +{ + drm_crtc_vblank_off(crtc); +} + +static void tegra_crtc_commit(struct drm_crtc *crtc) +{ + drm_crtc_vblank_on(crtc); +} + +static int tegra_crtc_atomic_check(struct drm_crtc *crtc, + struct drm_crtc_state *state) +{ + return 0; +} + +static void tegra_crtc_atomic_begin(struct drm_crtc *crtc) +{ + struct tegra_dc *dc = to_tegra_dc(crtc); + + if (crtc->state->event) { + crtc->state->event->pipe = drm_crtc_index(crtc); + + WARN_ON(drm_crtc_vblank_get(crtc) != 0); + + dc->event = crtc->state->event; + crtc->state->event = NULL; + } +} + +static void tegra_crtc_atomic_flush(struct drm_crtc *crtc) +{ + struct tegra_dc_state *state = to_dc_state(crtc->state); + struct tegra_dc *dc = to_tegra_dc(crtc); + + tegra_dc_writel(dc, state->planes << 8, DC_CMD_STATE_CONTROL); + tegra_dc_writel(dc, state->planes, DC_CMD_STATE_CONTROL); +} + +static const struct drm_crtc_helper_funcs tegra_crtc_helper_funcs = { + .disable = tegra_crtc_disable, + .mode_fixup = tegra_crtc_mode_fixup, + .mode_set_nofb = tegra_crtc_mode_set_nofb, + .prepare = tegra_crtc_prepare, + .commit = tegra_crtc_commit, + .atomic_check = tegra_crtc_atomic_check, + .atomic_begin = tegra_crtc_atomic_begin, + .atomic_flush = tegra_crtc_atomic_flush, +}; + +static irqreturn_t tegra_dc_irq(int irq, void *data) +{ + struct tegra_dc *dc = data; + unsigned long status; + + status = tegra_dc_readl(dc, DC_CMD_INT_STATUS); + tegra_dc_writel(dc, status, DC_CMD_INT_STATUS); + + if (status & FRAME_END_INT) { + /* + dev_dbg(dc->dev, "%s(): frame end\n", __func__); + */ + } + + if (status & VBLANK_INT) { + /* + dev_dbg(dc->dev, "%s(): vertical blank\n", __func__); + */ + drm_crtc_handle_vblank(&dc->base); + tegra_dc_finish_page_flip(dc); + } + + if (status & (WIN_A_UF_INT | WIN_B_UF_INT | WIN_C_UF_INT)) { + /* + dev_dbg(dc->dev, "%s(): underflow\n", __func__); + */ + } + + return IRQ_HANDLED; +} + +static int tegra_dc_show_regs(struct seq_file *s, void *data) +{ + struct drm_info_node *node = s->private; + struct tegra_dc *dc = node->info_ent->data; + +#define DUMP_REG(name) \ + seq_printf(s, "%-40s %#05x %08x\n", #name, name, \ + tegra_dc_readl(dc, name)) + + DUMP_REG(DC_CMD_GENERAL_INCR_SYNCPT); + DUMP_REG(DC_CMD_GENERAL_INCR_SYNCPT_CNTRL); + DUMP_REG(DC_CMD_GENERAL_INCR_SYNCPT_ERROR); + DUMP_REG(DC_CMD_WIN_A_INCR_SYNCPT); + DUMP_REG(DC_CMD_WIN_A_INCR_SYNCPT_CNTRL); + DUMP_REG(DC_CMD_WIN_A_INCR_SYNCPT_ERROR); + DUMP_REG(DC_CMD_WIN_B_INCR_SYNCPT); + DUMP_REG(DC_CMD_WIN_B_INCR_SYNCPT_CNTRL); + DUMP_REG(DC_CMD_WIN_B_INCR_SYNCPT_ERROR); + DUMP_REG(DC_CMD_WIN_C_INCR_SYNCPT); + DUMP_REG(DC_CMD_WIN_C_INCR_SYNCPT_CNTRL); + DUMP_REG(DC_CMD_WIN_C_INCR_SYNCPT_ERROR); + DUMP_REG(DC_CMD_CONT_SYNCPT_VSYNC); + DUMP_REG(DC_CMD_DISPLAY_COMMAND_OPTION0); + DUMP_REG(DC_CMD_DISPLAY_COMMAND); + DUMP_REG(DC_CMD_SIGNAL_RAISE); + DUMP_REG(DC_CMD_DISPLAY_POWER_CONTROL); + DUMP_REG(DC_CMD_INT_STATUS); + DUMP_REG(DC_CMD_INT_MASK); + DUMP_REG(DC_CMD_INT_ENABLE); + DUMP_REG(DC_CMD_INT_TYPE); + DUMP_REG(DC_CMD_INT_POLARITY); + DUMP_REG(DC_CMD_SIGNAL_RAISE1); + DUMP_REG(DC_CMD_SIGNAL_RAISE2); + DUMP_REG(DC_CMD_SIGNAL_RAISE3); + DUMP_REG(DC_CMD_STATE_ACCESS); + DUMP_REG(DC_CMD_STATE_CONTROL); + DUMP_REG(DC_CMD_DISPLAY_WINDOW_HEADER); + DUMP_REG(DC_CMD_REG_ACT_CONTROL); + DUMP_REG(DC_COM_CRC_CONTROL); + DUMP_REG(DC_COM_CRC_CHECKSUM); + DUMP_REG(DC_COM_PIN_OUTPUT_ENABLE(0)); + DUMP_REG(DC_COM_PIN_OUTPUT_ENABLE(1)); + DUMP_REG(DC_COM_PIN_OUTPUT_ENABLE(2)); + DUMP_REG(DC_COM_PIN_OUTPUT_ENABLE(3)); + DUMP_REG(DC_COM_PIN_OUTPUT_POLARITY(0)); + DUMP_REG(DC_COM_PIN_OUTPUT_POLARITY(1)); + DUMP_REG(DC_COM_PIN_OUTPUT_POLARITY(2)); + DUMP_REG(DC_COM_PIN_OUTPUT_POLARITY(3)); + DUMP_REG(DC_COM_PIN_OUTPUT_DATA(0)); + DUMP_REG(DC_COM_PIN_OUTPUT_DATA(1)); + DUMP_REG(DC_COM_PIN_OUTPUT_DATA(2)); + DUMP_REG(DC_COM_PIN_OUTPUT_DATA(3)); + DUMP_REG(DC_COM_PIN_INPUT_ENABLE(0)); + DUMP_REG(DC_COM_PIN_INPUT_ENABLE(1)); + DUMP_REG(DC_COM_PIN_INPUT_ENABLE(2)); + DUMP_REG(DC_COM_PIN_INPUT_ENABLE(3)); + DUMP_REG(DC_COM_PIN_INPUT_DATA(0)); + DUMP_REG(DC_COM_PIN_INPUT_DATA(1)); + DUMP_REG(DC_COM_PIN_OUTPUT_SELECT(0)); + DUMP_REG(DC_COM_PIN_OUTPUT_SELECT(1)); + DUMP_REG(DC_COM_PIN_OUTPUT_SELECT(2)); + DUMP_REG(DC_COM_PIN_OUTPUT_SELECT(3)); + DUMP_REG(DC_COM_PIN_OUTPUT_SELECT(4)); + DUMP_REG(DC_COM_PIN_OUTPUT_SELECT(5)); + DUMP_REG(DC_COM_PIN_OUTPUT_SELECT(6)); + DUMP_REG(DC_COM_PIN_MISC_CONTROL); + DUMP_REG(DC_COM_PIN_PM0_CONTROL); + DUMP_REG(DC_COM_PIN_PM0_DUTY_CYCLE); + DUMP_REG(DC_COM_PIN_PM1_CONTROL); + DUMP_REG(DC_COM_PIN_PM1_DUTY_CYCLE); + DUMP_REG(DC_COM_SPI_CONTROL); + DUMP_REG(DC_COM_SPI_START_BYTE); + DUMP_REG(DC_COM_HSPI_WRITE_DATA_AB); + DUMP_REG(DC_COM_HSPI_WRITE_DATA_CD); + DUMP_REG(DC_COM_HSPI_CS_DC); + DUMP_REG(DC_COM_SCRATCH_REGISTER_A); + DUMP_REG(DC_COM_SCRATCH_REGISTER_B); + DUMP_REG(DC_COM_GPIO_CTRL); + DUMP_REG(DC_COM_GPIO_DEBOUNCE_COUNTER); + DUMP_REG(DC_COM_CRC_CHECKSUM_LATCHED); + DUMP_REG(DC_DISP_DISP_SIGNAL_OPTIONS0); + DUMP_REG(DC_DISP_DISP_SIGNAL_OPTIONS1); + DUMP_REG(DC_DISP_DISP_WIN_OPTIONS); + DUMP_REG(DC_DISP_DISP_MEM_HIGH_PRIORITY); + DUMP_REG(DC_DISP_DISP_MEM_HIGH_PRIORITY_TIMER); + DUMP_REG(DC_DISP_DISP_TIMING_OPTIONS); + DUMP_REG(DC_DISP_REF_TO_SYNC); + DUMP_REG(DC_DISP_SYNC_WIDTH); + DUMP_REG(DC_DISP_BACK_PORCH); + DUMP_REG(DC_DISP_ACTIVE); + DUMP_REG(DC_DISP_FRONT_PORCH); + DUMP_REG(DC_DISP_H_PULSE0_CONTROL); + DUMP_REG(DC_DISP_H_PULSE0_POSITION_A); + DUMP_REG(DC_DISP_H_PULSE0_POSITION_B); + DUMP_REG(DC_DISP_H_PULSE0_POSITION_C); + DUMP_REG(DC_DISP_H_PULSE0_POSITION_D); + DUMP_REG(DC_DISP_H_PULSE1_CONTROL); + DUMP_REG(DC_DISP_H_PULSE1_POSITION_A); + DUMP_REG(DC_DISP_H_PULSE1_POSITION_B); + DUMP_REG(DC_DISP_H_PULSE1_POSITION_C); + DUMP_REG(DC_DISP_H_PULSE1_POSITION_D); + DUMP_REG(DC_DISP_H_PULSE2_CONTROL); + DUMP_REG(DC_DISP_H_PULSE2_POSITION_A); + DUMP_REG(DC_DISP_H_PULSE2_POSITION_B); + DUMP_REG(DC_DISP_H_PULSE2_POSITION_C); + DUMP_REG(DC_DISP_H_PULSE2_POSITION_D); + DUMP_REG(DC_DISP_V_PULSE0_CONTROL); + DUMP_REG(DC_DISP_V_PULSE0_POSITION_A); + DUMP_REG(DC_DISP_V_PULSE0_POSITION_B); + DUMP_REG(DC_DISP_V_PULSE0_POSITION_C); + DUMP_REG(DC_DISP_V_PULSE1_CONTROL); + DUMP_REG(DC_DISP_V_PULSE1_POSITION_A); + DUMP_REG(DC_DISP_V_PULSE1_POSITION_B); + DUMP_REG(DC_DISP_V_PULSE1_POSITION_C); + DUMP_REG(DC_DISP_V_PULSE2_CONTROL); + DUMP_REG(DC_DISP_V_PULSE2_POSITION_A); + DUMP_REG(DC_DISP_V_PULSE3_CONTROL); + DUMP_REG(DC_DISP_V_PULSE3_POSITION_A); + DUMP_REG(DC_DISP_M0_CONTROL); + DUMP_REG(DC_DISP_M1_CONTROL); + DUMP_REG(DC_DISP_DI_CONTROL); + DUMP_REG(DC_DISP_PP_CONTROL); + DUMP_REG(DC_DISP_PP_SELECT_A); + DUMP_REG(DC_DISP_PP_SELECT_B); + DUMP_REG(DC_DISP_PP_SELECT_C); + DUMP_REG(DC_DISP_PP_SELECT_D); + DUMP_REG(DC_DISP_DISP_CLOCK_CONTROL); + DUMP_REG(DC_DISP_DISP_INTERFACE_CONTROL); + DUMP_REG(DC_DISP_DISP_COLOR_CONTROL); + DUMP_REG(DC_DISP_SHIFT_CLOCK_OPTIONS); + DUMP_REG(DC_DISP_DATA_ENABLE_OPTIONS); + DUMP_REG(DC_DISP_SERIAL_INTERFACE_OPTIONS); + DUMP_REG(DC_DISP_LCD_SPI_OPTIONS); + DUMP_REG(DC_DISP_BORDER_COLOR); + DUMP_REG(DC_DISP_COLOR_KEY0_LOWER); + DUMP_REG(DC_DISP_COLOR_KEY0_UPPER); + DUMP_REG(DC_DISP_COLOR_KEY1_LOWER); + DUMP_REG(DC_DISP_COLOR_KEY1_UPPER); + DUMP_REG(DC_DISP_CURSOR_FOREGROUND); + DUMP_REG(DC_DISP_CURSOR_BACKGROUND); + DUMP_REG(DC_DISP_CURSOR_START_ADDR); + DUMP_REG(DC_DISP_CURSOR_START_ADDR_NS); + DUMP_REG(DC_DISP_CURSOR_POSITION); + DUMP_REG(DC_DISP_CURSOR_POSITION_NS); + DUMP_REG(DC_DISP_INIT_SEQ_CONTROL); + DUMP_REG(DC_DISP_SPI_INIT_SEQ_DATA_A); + DUMP_REG(DC_DISP_SPI_INIT_SEQ_DATA_B); + DUMP_REG(DC_DISP_SPI_INIT_SEQ_DATA_C); + DUMP_REG(DC_DISP_SPI_INIT_SEQ_DATA_D); + DUMP_REG(DC_DISP_DC_MCCIF_FIFOCTRL); + DUMP_REG(DC_DISP_MCCIF_DISPLAY0A_HYST); + DUMP_REG(DC_DISP_MCCIF_DISPLAY0B_HYST); + DUMP_REG(DC_DISP_MCCIF_DISPLAY1A_HYST); + DUMP_REG(DC_DISP_MCCIF_DISPLAY1B_HYST); + DUMP_REG(DC_DISP_DAC_CRT_CTRL); + DUMP_REG(DC_DISP_DISP_MISC_CONTROL); + DUMP_REG(DC_DISP_SD_CONTROL); + DUMP_REG(DC_DISP_SD_CSC_COEFF); + DUMP_REG(DC_DISP_SD_LUT(0)); + DUMP_REG(DC_DISP_SD_LUT(1)); + DUMP_REG(DC_DISP_SD_LUT(2)); + DUMP_REG(DC_DISP_SD_LUT(3)); + DUMP_REG(DC_DISP_SD_LUT(4)); + DUMP_REG(DC_DISP_SD_LUT(5)); + DUMP_REG(DC_DISP_SD_LUT(6)); + DUMP_REG(DC_DISP_SD_LUT(7)); + DUMP_REG(DC_DISP_SD_LUT(8)); + DUMP_REG(DC_DISP_SD_FLICKER_CONTROL); + DUMP_REG(DC_DISP_DC_PIXEL_COUNT); + DUMP_REG(DC_DISP_SD_HISTOGRAM(0)); + DUMP_REG(DC_DISP_SD_HISTOGRAM(1)); + DUMP_REG(DC_DISP_SD_HISTOGRAM(2)); + DUMP_REG(DC_DISP_SD_HISTOGRAM(3)); + DUMP_REG(DC_DISP_SD_HISTOGRAM(4)); + DUMP_REG(DC_DISP_SD_HISTOGRAM(5)); + DUMP_REG(DC_DISP_SD_HISTOGRAM(6)); + DUMP_REG(DC_DISP_SD_HISTOGRAM(7)); + DUMP_REG(DC_DISP_SD_BL_TF(0)); + DUMP_REG(DC_DISP_SD_BL_TF(1)); + DUMP_REG(DC_DISP_SD_BL_TF(2)); + DUMP_REG(DC_DISP_SD_BL_TF(3)); + DUMP_REG(DC_DISP_SD_BL_CONTROL); + DUMP_REG(DC_DISP_SD_HW_K_VALUES); + DUMP_REG(DC_DISP_SD_MAN_K_VALUES); + DUMP_REG(DC_DISP_CURSOR_START_ADDR_HI); + DUMP_REG(DC_DISP_BLEND_CURSOR_CONTROL); + DUMP_REG(DC_WIN_WIN_OPTIONS); + DUMP_REG(DC_WIN_BYTE_SWAP); + DUMP_REG(DC_WIN_BUFFER_CONTROL); + DUMP_REG(DC_WIN_COLOR_DEPTH); + DUMP_REG(DC_WIN_POSITION); + DUMP_REG(DC_WIN_SIZE); + DUMP_REG(DC_WIN_PRESCALED_SIZE); + DUMP_REG(DC_WIN_H_INITIAL_DDA); + DUMP_REG(DC_WIN_V_INITIAL_DDA); + DUMP_REG(DC_WIN_DDA_INC); + DUMP_REG(DC_WIN_LINE_STRIDE); + DUMP_REG(DC_WIN_BUF_STRIDE); + DUMP_REG(DC_WIN_UV_BUF_STRIDE); + DUMP_REG(DC_WIN_BUFFER_ADDR_MODE); + DUMP_REG(DC_WIN_DV_CONTROL); + DUMP_REG(DC_WIN_BLEND_NOKEY); + DUMP_REG(DC_WIN_BLEND_1WIN); + DUMP_REG(DC_WIN_BLEND_2WIN_X); + DUMP_REG(DC_WIN_BLEND_2WIN_Y); + DUMP_REG(DC_WIN_BLEND_3WIN_XY); + DUMP_REG(DC_WIN_HP_FETCH_CONTROL); + DUMP_REG(DC_WINBUF_START_ADDR); + DUMP_REG(DC_WINBUF_START_ADDR_NS); + DUMP_REG(DC_WINBUF_START_ADDR_U); + DUMP_REG(DC_WINBUF_START_ADDR_U_NS); + DUMP_REG(DC_WINBUF_START_ADDR_V); + DUMP_REG(DC_WINBUF_START_ADDR_V_NS); + DUMP_REG(DC_WINBUF_ADDR_H_OFFSET); + DUMP_REG(DC_WINBUF_ADDR_H_OFFSET_NS); + DUMP_REG(DC_WINBUF_ADDR_V_OFFSET); + DUMP_REG(DC_WINBUF_ADDR_V_OFFSET_NS); + DUMP_REG(DC_WINBUF_UFLOW_STATUS); + DUMP_REG(DC_WINBUF_AD_UFLOW_STATUS); + DUMP_REG(DC_WINBUF_BD_UFLOW_STATUS); + DUMP_REG(DC_WINBUF_CD_UFLOW_STATUS); + +#undef DUMP_REG + + return 0; +} + +static struct drm_info_list debugfs_files[] = { + { "regs", tegra_dc_show_regs, 0, NULL }, +}; + +static int tegra_dc_debugfs_init(struct tegra_dc *dc, struct drm_minor *minor) +{ + unsigned int i; + char *name; + int err; + + name = kasprintf(GFP_KERNEL, "dc.%d", dc->pipe); + dc->debugfs = debugfs_create_dir(name, minor->debugfs_root); + kfree(name); + + if (!dc->debugfs) + return -ENOMEM; + + dc->debugfs_files = kmemdup(debugfs_files, sizeof(debugfs_files), + GFP_KERNEL); + if (!dc->debugfs_files) { + err = -ENOMEM; + goto remove; + } + + for (i = 0; i < ARRAY_SIZE(debugfs_files); i++) + dc->debugfs_files[i].data = dc; + + err = drm_debugfs_create_files(dc->debugfs_files, + ARRAY_SIZE(debugfs_files), + dc->debugfs, minor); + if (err < 0) + goto free; + + dc->minor = minor; + + return 0; + +free: + kfree(dc->debugfs_files); + dc->debugfs_files = NULL; +remove: + debugfs_remove(dc->debugfs); + dc->debugfs = NULL; + + return err; +} + +static int tegra_dc_debugfs_exit(struct tegra_dc *dc) +{ + drm_debugfs_remove_files(dc->debugfs_files, ARRAY_SIZE(debugfs_files), + dc->minor); + dc->minor = NULL; + + kfree(dc->debugfs_files); + dc->debugfs_files = NULL; + + debugfs_remove(dc->debugfs); + dc->debugfs = NULL; + + return 0; +} + +static int tegra_dc_init(struct host1x_client *client) +{ + struct drm_device *drm = dev_get_drvdata(client->parent); + struct tegra_dc *dc = host1x_client_to_dc(client); + struct tegra_drm *tegra = drm->dev_private; + struct drm_plane *primary = NULL; + struct drm_plane *cursor = NULL; + u32 value; + int err; + + if (tegra->domain) { + err = iommu_attach_device(tegra->domain, dc->dev); + if (err < 0) { + dev_err(dc->dev, "failed to attach to domain: %d\n", + err); + return err; + } + + dc->domain = tegra->domain; + } + + primary = tegra_dc_primary_plane_create(drm, dc); + if (IS_ERR(primary)) { + err = PTR_ERR(primary); + goto cleanup; + } + + if (dc->soc->supports_cursor) { + cursor = tegra_dc_cursor_plane_create(drm, dc); + if (IS_ERR(cursor)) { + err = PTR_ERR(cursor); + goto cleanup; + } + } + + err = drm_crtc_init_with_planes(drm, &dc->base, primary, cursor, + &tegra_crtc_funcs); + if (err < 0) + goto cleanup; + + drm_mode_crtc_set_gamma_size(&dc->base, 256); + drm_crtc_helper_add(&dc->base, &tegra_crtc_helper_funcs); + + /* + * Keep track of the minimum pitch alignment across all display + * controllers. + */ + if (dc->soc->pitch_align > tegra->pitch_align) + tegra->pitch_align = dc->soc->pitch_align; + + err = tegra_dc_rgb_init(drm, dc); + if (err < 0 && err != -ENODEV) { + dev_err(dc->dev, "failed to initialize RGB output: %d\n", err); + goto cleanup; + } + + err = tegra_dc_add_planes(drm, dc); + if (err < 0) + goto cleanup; + + if (IS_ENABLED(CONFIG_DEBUG_FS)) { + err = tegra_dc_debugfs_init(dc, drm->primary); + if (err < 0) + dev_err(dc->dev, "debugfs setup failed: %d\n", err); + } + + err = devm_request_irq(dc->dev, dc->irq, tegra_dc_irq, 0, + dev_name(dc->dev), dc); + if (err < 0) { + dev_err(dc->dev, "failed to request IRQ#%u: %d\n", dc->irq, + err); + goto cleanup; + } + + /* initialize display controller */ + if (dc->syncpt) { + u32 syncpt = host1x_syncpt_id(dc->syncpt); + + value = SYNCPT_CNTRL_NO_STALL; + tegra_dc_writel(dc, value, DC_CMD_GENERAL_INCR_SYNCPT_CNTRL); + + value = SYNCPT_VSYNC_ENABLE | syncpt; + tegra_dc_writel(dc, value, DC_CMD_CONT_SYNCPT_VSYNC); + } + + value = WIN_A_UF_INT | WIN_B_UF_INT | WIN_C_UF_INT | WIN_A_OF_INT; + tegra_dc_writel(dc, value, DC_CMD_INT_TYPE); + + value = WIN_A_UF_INT | WIN_B_UF_INT | WIN_C_UF_INT | + WIN_A_OF_INT | WIN_B_OF_INT | WIN_C_OF_INT; + tegra_dc_writel(dc, value, DC_CMD_INT_POLARITY); + + /* initialize timer */ + value = CURSOR_THRESHOLD(0) | WINDOW_A_THRESHOLD(0x20) | + WINDOW_B_THRESHOLD(0x20) | WINDOW_C_THRESHOLD(0x20); + tegra_dc_writel(dc, value, DC_DISP_DISP_MEM_HIGH_PRIORITY); + + value = CURSOR_THRESHOLD(0) | WINDOW_A_THRESHOLD(1) | + WINDOW_B_THRESHOLD(1) | WINDOW_C_THRESHOLD(1); + tegra_dc_writel(dc, value, DC_DISP_DISP_MEM_HIGH_PRIORITY_TIMER); + + value = VBLANK_INT | WIN_A_UF_INT | WIN_B_UF_INT | WIN_C_UF_INT; + tegra_dc_writel(dc, value, DC_CMD_INT_ENABLE); + + value = WIN_A_UF_INT | WIN_B_UF_INT | WIN_C_UF_INT; + tegra_dc_writel(dc, value, DC_CMD_INT_MASK); + + if (dc->soc->supports_border_color) + tegra_dc_writel(dc, 0, DC_DISP_BORDER_COLOR); + + return 0; + +cleanup: + if (cursor) + drm_plane_cleanup(cursor); + + if (primary) + drm_plane_cleanup(primary); + + if (tegra->domain) { + iommu_detach_device(tegra->domain, dc->dev); + dc->domain = NULL; + } + + return err; +} + +static int tegra_dc_exit(struct host1x_client *client) +{ + struct tegra_dc *dc = host1x_client_to_dc(client); + int err; + + devm_free_irq(dc->dev, dc->irq, dc); + + if (IS_ENABLED(CONFIG_DEBUG_FS)) { + err = tegra_dc_debugfs_exit(dc); + if (err < 0) + dev_err(dc->dev, "debugfs cleanup failed: %d\n", err); + } + + err = tegra_dc_rgb_exit(dc); + if (err) { + dev_err(dc->dev, "failed to shutdown RGB output: %d\n", err); + return err; + } + + if (dc->domain) { + iommu_detach_device(dc->domain, dc->dev); + dc->domain = NULL; + } + + return 0; +} + +static const struct host1x_client_ops dc_client_ops = { + .init = tegra_dc_init, + .exit = tegra_dc_exit, +}; + +static const struct tegra_dc_soc_info tegra20_dc_soc_info = { + .supports_border_color = true, + .supports_interlacing = false, + .supports_cursor = false, + .supports_block_linear = false, + .pitch_align = 8, + .has_powergate = false, +}; + +static const struct tegra_dc_soc_info tegra30_dc_soc_info = { + .supports_border_color = true, + .supports_interlacing = false, + .supports_cursor = false, + .supports_block_linear = false, + .pitch_align = 8, + .has_powergate = false, +}; + +static const struct tegra_dc_soc_info tegra114_dc_soc_info = { + .supports_border_color = true, + .supports_interlacing = false, + .supports_cursor = false, + .supports_block_linear = false, + .pitch_align = 64, + .has_powergate = true, +}; + +static const struct tegra_dc_soc_info tegra124_dc_soc_info = { + .supports_border_color = false, + .supports_interlacing = true, + .supports_cursor = true, + .supports_block_linear = true, + .pitch_align = 64, + .has_powergate = true, +}; + +static const struct of_device_id tegra_dc_of_match[] = { + { + .compatible = "nvidia,tegra124-dc", + .data = &tegra124_dc_soc_info, + }, { + .compatible = "nvidia,tegra114-dc", + .data = &tegra114_dc_soc_info, + }, { + .compatible = "nvidia,tegra30-dc", + .data = &tegra30_dc_soc_info, + }, { + .compatible = "nvidia,tegra20-dc", + .data = &tegra20_dc_soc_info, + }, { + /* sentinel */ + } +}; +MODULE_DEVICE_TABLE(of, tegra_dc_of_match); + +static int tegra_dc_parse_dt(struct tegra_dc *dc) +{ + struct device_node *np; + u32 value = 0; + int err; + + err = of_property_read_u32(dc->dev->of_node, "nvidia,head", &value); + if (err < 0) { + dev_err(dc->dev, "missing \"nvidia,head\" property\n"); + + /* + * If the nvidia,head property isn't present, try to find the + * correct head number by looking up the position of this + * display controller's node within the device tree. Assuming + * that the nodes are ordered properly in the DTS file and + * that the translation into a flattened device tree blob + * preserves that ordering this will actually yield the right + * head number. + * + * If those assumptions don't hold, this will still work for + * cases where only a single display controller is used. + */ + for_each_matching_node(np, tegra_dc_of_match) { + if (np == dc->dev->of_node) + break; + + value++; + } + } + + dc->pipe = value; + + return 0; +} + +static int tegra_dc_probe(struct platform_device *pdev) +{ + unsigned long flags = HOST1X_SYNCPT_CLIENT_MANAGED; + const struct of_device_id *id; + struct resource *regs; + struct tegra_dc *dc; + int err; + + dc = devm_kzalloc(&pdev->dev, sizeof(*dc), GFP_KERNEL); + if (!dc) + return -ENOMEM; + + id = of_match_node(tegra_dc_of_match, pdev->dev.of_node); + if (!id) + return -ENODEV; + + spin_lock_init(&dc->lock); + INIT_LIST_HEAD(&dc->list); + dc->dev = &pdev->dev; + dc->soc = id->data; + + err = tegra_dc_parse_dt(dc); + if (err < 0) + return err; + + dc->clk = devm_clk_get(&pdev->dev, NULL); + if (IS_ERR(dc->clk)) { + dev_err(&pdev->dev, "failed to get clock\n"); + return PTR_ERR(dc->clk); + } + + dc->rst = devm_reset_control_get(&pdev->dev, "dc"); + if (IS_ERR(dc->rst)) { + dev_err(&pdev->dev, "failed to get reset\n"); + return PTR_ERR(dc->rst); + } + + if (dc->soc->has_powergate) { + if (dc->pipe == 0) + dc->powergate = TEGRA_POWERGATE_DIS; + else + dc->powergate = TEGRA_POWERGATE_DISB; + + err = tegra_powergate_sequence_power_up(dc->powergate, dc->clk, + dc->rst); + if (err < 0) { + dev_err(&pdev->dev, "failed to power partition: %d\n", + err); + return err; + } + } else { + err = clk_prepare_enable(dc->clk); + if (err < 0) { + dev_err(&pdev->dev, "failed to enable clock: %d\n", + err); + return err; + } + + err = reset_control_deassert(dc->rst); + if (err < 0) { + dev_err(&pdev->dev, "failed to deassert reset: %d\n", + err); + return err; + } + } + + regs = platform_get_resource(pdev, IORESOURCE_MEM, 0); + dc->regs = devm_ioremap_resource(&pdev->dev, regs); + if (IS_ERR(dc->regs)) + return PTR_ERR(dc->regs); + + dc->irq = platform_get_irq(pdev, 0); + if (dc->irq < 0) { + dev_err(&pdev->dev, "failed to get IRQ\n"); + return -ENXIO; + } + + INIT_LIST_HEAD(&dc->client.list); + dc->client.ops = &dc_client_ops; + dc->client.dev = &pdev->dev; + + err = tegra_dc_rgb_probe(dc); + if (err < 0 && err != -ENODEV) { + dev_err(&pdev->dev, "failed to probe RGB output: %d\n", err); + return err; + } + + err = host1x_client_register(&dc->client); + if (err < 0) { + dev_err(&pdev->dev, "failed to register host1x client: %d\n", + err); + return err; + } + + dc->syncpt = host1x_syncpt_request(&pdev->dev, flags); + if (!dc->syncpt) + dev_warn(&pdev->dev, "failed to allocate syncpoint\n"); + + platform_set_drvdata(pdev, dc); + + return 0; +} + +static int tegra_dc_remove(struct platform_device *pdev) +{ + struct tegra_dc *dc = platform_get_drvdata(pdev); + int err; + + host1x_syncpt_free(dc->syncpt); + + err = host1x_client_unregister(&dc->client); + if (err < 0) { + dev_err(&pdev->dev, "failed to unregister host1x client: %d\n", + err); + return err; + } + + err = tegra_dc_rgb_remove(dc); + if (err < 0) { + dev_err(&pdev->dev, "failed to remove RGB output: %d\n", err); + return err; + } + + reset_control_assert(dc->rst); + + if (dc->soc->has_powergate) + tegra_powergate_power_off(dc->powergate); + + clk_disable_unprepare(dc->clk); + + return 0; +} + +struct platform_driver tegra_dc_driver = { + .driver = { + .name = "tegra-dc", + .owner = THIS_MODULE, + .of_match_table = tegra_dc_of_match, + }, + .probe = tegra_dc_probe, + .remove = tegra_dc_remove, +}; |