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fb85ac4da8
Many of the drivers didn't implement palette/gamma handling, but were forced to provide stubs for the hooks to avoid drm_fb_helper from oopsing. Now that the hooks are optional, we can eliminate all the stubs. Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch> Signed-off-by: Dave Airlie <airlied@gmail.com>
428 lines
11 KiB
C
428 lines
11 KiB
C
/* exynos_drm_crtc.c
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*
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* Copyright (c) 2011 Samsung Electronics Co., Ltd.
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* Authors:
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* Inki Dae <inki.dae@samsung.com>
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* Joonyoung Shim <jy0922.shim@samsung.com>
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* Seung-Woo Kim <sw0312.kim@samsung.com>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*/
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#include <drm/drmP.h>
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#include <drm/drm_crtc_helper.h>
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#include "exynos_drm_drv.h"
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#include "exynos_drm_encoder.h"
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#include "exynos_drm_plane.h"
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#define to_exynos_crtc(x) container_of(x, struct exynos_drm_crtc,\
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drm_crtc)
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enum exynos_crtc_mode {
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CRTC_MODE_NORMAL, /* normal mode */
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CRTC_MODE_BLANK, /* The private plane of crtc is blank */
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};
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/*
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* Exynos specific crtc structure.
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*
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* @drm_crtc: crtc object.
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* @drm_plane: pointer of private plane object for this crtc
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* @pipe: a crtc index created at load() with a new crtc object creation
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* and the crtc object would be set to private->crtc array
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* to get a crtc object corresponding to this pipe from private->crtc
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* array when irq interrupt occured. the reason of using this pipe is that
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* drm framework doesn't support multiple irq yet.
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* we can refer to the crtc to current hardware interrupt occured through
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* this pipe value.
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* @dpms: store the crtc dpms value
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* @mode: store the crtc mode value
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*/
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struct exynos_drm_crtc {
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struct drm_crtc drm_crtc;
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struct drm_plane *plane;
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unsigned int pipe;
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unsigned int dpms;
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enum exynos_crtc_mode mode;
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wait_queue_head_t pending_flip_queue;
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atomic_t pending_flip;
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};
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static void exynos_drm_crtc_dpms(struct drm_crtc *crtc, int mode)
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{
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struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
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DRM_DEBUG_KMS("crtc[%d] mode[%d]\n", crtc->base.id, mode);
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if (exynos_crtc->dpms == mode) {
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DRM_DEBUG_KMS("desired dpms mode is same as previous one.\n");
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return;
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}
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if (mode > DRM_MODE_DPMS_ON) {
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/* wait for the completion of page flip. */
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wait_event(exynos_crtc->pending_flip_queue,
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atomic_read(&exynos_crtc->pending_flip) == 0);
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drm_vblank_off(crtc->dev, exynos_crtc->pipe);
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}
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exynos_drm_fn_encoder(crtc, &mode, exynos_drm_encoder_crtc_dpms);
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exynos_crtc->dpms = mode;
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}
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static void exynos_drm_crtc_prepare(struct drm_crtc *crtc)
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{
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DRM_DEBUG_KMS("%s\n", __FILE__);
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/* drm framework doesn't check NULL. */
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}
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static void exynos_drm_crtc_commit(struct drm_crtc *crtc)
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{
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struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
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DRM_DEBUG_KMS("%s\n", __FILE__);
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exynos_drm_crtc_dpms(crtc, DRM_MODE_DPMS_ON);
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exynos_plane_commit(exynos_crtc->plane);
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exynos_plane_dpms(exynos_crtc->plane, DRM_MODE_DPMS_ON);
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}
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static bool
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exynos_drm_crtc_mode_fixup(struct drm_crtc *crtc,
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const struct drm_display_mode *mode,
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struct drm_display_mode *adjusted_mode)
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{
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DRM_DEBUG_KMS("%s\n", __FILE__);
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/* drm framework doesn't check NULL */
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return true;
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}
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static int
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exynos_drm_crtc_mode_set(struct drm_crtc *crtc, struct drm_display_mode *mode,
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struct drm_display_mode *adjusted_mode, int x, int y,
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struct drm_framebuffer *old_fb)
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{
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struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
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struct drm_plane *plane = exynos_crtc->plane;
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unsigned int crtc_w;
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unsigned int crtc_h;
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int pipe = exynos_crtc->pipe;
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int ret;
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DRM_DEBUG_KMS("%s\n", __FILE__);
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/*
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* copy the mode data adjusted by mode_fixup() into crtc->mode
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* so that hardware can be seet to proper mode.
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*/
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memcpy(&crtc->mode, adjusted_mode, sizeof(*adjusted_mode));
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crtc_w = crtc->fb->width - x;
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crtc_h = crtc->fb->height - y;
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ret = exynos_plane_mode_set(plane, crtc, crtc->fb, 0, 0, crtc_w, crtc_h,
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x, y, crtc_w, crtc_h);
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if (ret)
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return ret;
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plane->crtc = crtc;
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plane->fb = crtc->fb;
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exynos_drm_fn_encoder(crtc, &pipe, exynos_drm_encoder_crtc_pipe);
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return 0;
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}
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static int exynos_drm_crtc_mode_set_base(struct drm_crtc *crtc, int x, int y,
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struct drm_framebuffer *old_fb)
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{
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struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
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struct drm_plane *plane = exynos_crtc->plane;
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unsigned int crtc_w;
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unsigned int crtc_h;
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int ret;
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DRM_DEBUG_KMS("%s\n", __FILE__);
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/* when framebuffer changing is requested, crtc's dpms should be on */
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if (exynos_crtc->dpms > DRM_MODE_DPMS_ON) {
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DRM_ERROR("failed framebuffer changing request.\n");
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return -EPERM;
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}
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crtc_w = crtc->fb->width - x;
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crtc_h = crtc->fb->height - y;
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ret = exynos_plane_mode_set(plane, crtc, crtc->fb, 0, 0, crtc_w, crtc_h,
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x, y, crtc_w, crtc_h);
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if (ret)
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return ret;
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exynos_drm_crtc_commit(crtc);
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return 0;
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}
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static void exynos_drm_crtc_disable(struct drm_crtc *crtc)
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{
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struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
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DRM_DEBUG_KMS("%s\n", __FILE__);
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exynos_plane_dpms(exynos_crtc->plane, DRM_MODE_DPMS_OFF);
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exynos_drm_crtc_dpms(crtc, DRM_MODE_DPMS_OFF);
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}
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static struct drm_crtc_helper_funcs exynos_crtc_helper_funcs = {
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.dpms = exynos_drm_crtc_dpms,
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.prepare = exynos_drm_crtc_prepare,
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.commit = exynos_drm_crtc_commit,
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.mode_fixup = exynos_drm_crtc_mode_fixup,
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.mode_set = exynos_drm_crtc_mode_set,
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.mode_set_base = exynos_drm_crtc_mode_set_base,
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.disable = exynos_drm_crtc_disable,
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};
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static int exynos_drm_crtc_page_flip(struct drm_crtc *crtc,
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struct drm_framebuffer *fb,
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struct drm_pending_vblank_event *event)
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{
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struct drm_device *dev = crtc->dev;
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struct exynos_drm_private *dev_priv = dev->dev_private;
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struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
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struct drm_framebuffer *old_fb = crtc->fb;
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int ret = -EINVAL;
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DRM_DEBUG_KMS("%s\n", __FILE__);
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/* when the page flip is requested, crtc's dpms should be on */
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if (exynos_crtc->dpms > DRM_MODE_DPMS_ON) {
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DRM_ERROR("failed page flip request.\n");
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return -EINVAL;
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}
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mutex_lock(&dev->struct_mutex);
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if (event) {
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/*
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* the pipe from user always is 0 so we can set pipe number
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* of current owner to event.
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*/
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event->pipe = exynos_crtc->pipe;
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ret = drm_vblank_get(dev, exynos_crtc->pipe);
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if (ret) {
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DRM_DEBUG("failed to acquire vblank counter\n");
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goto out;
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}
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spin_lock_irq(&dev->event_lock);
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list_add_tail(&event->base.link,
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&dev_priv->pageflip_event_list);
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atomic_set(&exynos_crtc->pending_flip, 1);
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spin_unlock_irq(&dev->event_lock);
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crtc->fb = fb;
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ret = exynos_drm_crtc_mode_set_base(crtc, crtc->x, crtc->y,
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NULL);
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if (ret) {
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crtc->fb = old_fb;
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spin_lock_irq(&dev->event_lock);
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drm_vblank_put(dev, exynos_crtc->pipe);
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list_del(&event->base.link);
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spin_unlock_irq(&dev->event_lock);
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goto out;
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}
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}
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out:
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mutex_unlock(&dev->struct_mutex);
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return ret;
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}
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static void exynos_drm_crtc_destroy(struct drm_crtc *crtc)
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{
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struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
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struct exynos_drm_private *private = crtc->dev->dev_private;
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DRM_DEBUG_KMS("%s\n", __FILE__);
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private->crtc[exynos_crtc->pipe] = NULL;
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drm_crtc_cleanup(crtc);
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kfree(exynos_crtc);
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}
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static int exynos_drm_crtc_set_property(struct drm_crtc *crtc,
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struct drm_property *property,
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uint64_t val)
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{
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struct drm_device *dev = crtc->dev;
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struct exynos_drm_private *dev_priv = dev->dev_private;
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struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
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DRM_DEBUG_KMS("%s\n", __func__);
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if (property == dev_priv->crtc_mode_property) {
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enum exynos_crtc_mode mode = val;
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if (mode == exynos_crtc->mode)
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return 0;
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exynos_crtc->mode = mode;
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switch (mode) {
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case CRTC_MODE_NORMAL:
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exynos_drm_crtc_commit(crtc);
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break;
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case CRTC_MODE_BLANK:
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exynos_plane_dpms(exynos_crtc->plane,
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DRM_MODE_DPMS_OFF);
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break;
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default:
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break;
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}
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return 0;
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}
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return -EINVAL;
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}
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static struct drm_crtc_funcs exynos_crtc_funcs = {
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.set_config = drm_crtc_helper_set_config,
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.page_flip = exynos_drm_crtc_page_flip,
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.destroy = exynos_drm_crtc_destroy,
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.set_property = exynos_drm_crtc_set_property,
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};
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static const struct drm_prop_enum_list mode_names[] = {
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{ CRTC_MODE_NORMAL, "normal" },
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{ CRTC_MODE_BLANK, "blank" },
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};
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static void exynos_drm_crtc_attach_mode_property(struct drm_crtc *crtc)
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{
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struct drm_device *dev = crtc->dev;
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struct exynos_drm_private *dev_priv = dev->dev_private;
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struct drm_property *prop;
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DRM_DEBUG_KMS("%s\n", __func__);
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prop = dev_priv->crtc_mode_property;
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if (!prop) {
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prop = drm_property_create_enum(dev, 0, "mode", mode_names,
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ARRAY_SIZE(mode_names));
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if (!prop)
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return;
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dev_priv->crtc_mode_property = prop;
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}
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drm_object_attach_property(&crtc->base, prop, 0);
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}
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int exynos_drm_crtc_create(struct drm_device *dev, unsigned int nr)
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{
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struct exynos_drm_crtc *exynos_crtc;
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struct exynos_drm_private *private = dev->dev_private;
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struct drm_crtc *crtc;
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DRM_DEBUG_KMS("%s\n", __FILE__);
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exynos_crtc = kzalloc(sizeof(*exynos_crtc), GFP_KERNEL);
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if (!exynos_crtc) {
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DRM_ERROR("failed to allocate exynos crtc\n");
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return -ENOMEM;
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}
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exynos_crtc->pipe = nr;
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exynos_crtc->dpms = DRM_MODE_DPMS_OFF;
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init_waitqueue_head(&exynos_crtc->pending_flip_queue);
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atomic_set(&exynos_crtc->pending_flip, 0);
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exynos_crtc->plane = exynos_plane_init(dev, 1 << nr, true);
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if (!exynos_crtc->plane) {
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kfree(exynos_crtc);
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return -ENOMEM;
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}
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crtc = &exynos_crtc->drm_crtc;
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private->crtc[nr] = crtc;
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drm_crtc_init(dev, crtc, &exynos_crtc_funcs);
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drm_crtc_helper_add(crtc, &exynos_crtc_helper_funcs);
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exynos_drm_crtc_attach_mode_property(crtc);
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return 0;
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}
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int exynos_drm_crtc_enable_vblank(struct drm_device *dev, int crtc)
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{
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struct exynos_drm_private *private = dev->dev_private;
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struct exynos_drm_crtc *exynos_crtc =
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to_exynos_crtc(private->crtc[crtc]);
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DRM_DEBUG_KMS("%s\n", __FILE__);
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if (exynos_crtc->dpms != DRM_MODE_DPMS_ON)
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return -EPERM;
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exynos_drm_fn_encoder(private->crtc[crtc], &crtc,
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exynos_drm_enable_vblank);
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return 0;
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}
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void exynos_drm_crtc_disable_vblank(struct drm_device *dev, int crtc)
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{
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struct exynos_drm_private *private = dev->dev_private;
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struct exynos_drm_crtc *exynos_crtc =
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to_exynos_crtc(private->crtc[crtc]);
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DRM_DEBUG_KMS("%s\n", __FILE__);
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if (exynos_crtc->dpms != DRM_MODE_DPMS_ON)
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return;
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exynos_drm_fn_encoder(private->crtc[crtc], &crtc,
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exynos_drm_disable_vblank);
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}
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void exynos_drm_crtc_finish_pageflip(struct drm_device *dev, int crtc)
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{
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struct exynos_drm_private *dev_priv = dev->dev_private;
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struct drm_pending_vblank_event *e, *t;
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struct drm_crtc *drm_crtc = dev_priv->crtc[crtc];
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struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(drm_crtc);
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unsigned long flags;
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DRM_DEBUG_KMS("%s\n", __FILE__);
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spin_lock_irqsave(&dev->event_lock, flags);
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list_for_each_entry_safe(e, t, &dev_priv->pageflip_event_list,
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base.link) {
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/* if event's pipe isn't same as crtc then ignore it. */
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if (crtc != e->pipe)
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continue;
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list_del(&e->base.link);
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drm_send_vblank_event(dev, -1, e);
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drm_vblank_put(dev, crtc);
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atomic_set(&exynos_crtc->pending_flip, 0);
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wake_up(&exynos_crtc->pending_flip_queue);
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}
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spin_unlock_irqrestore(&dev->event_lock, flags);
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}
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