Read out the current plane configuration at init time into a new
plane_config structure. This allows us to track any existing
framebuffers attached to the plane and potentially re-use them in our
fbdev code for a smooth handoff.
v2: update for new pitch_for_width function (Jesse)
comment how get_plane_config works with shared fbs (Jesse)
v3: s/ARGB/XRGB (Ville)
use pipesrc width/height (Ville)
fix fourcc comment (Bob)
use drm_format_plane_cpp (Ville)
v4: use fb for tracking fb data object (Ville)
v5: fix up gen2 pitch limits (Ville)
v6: read out stride as well (Daniel)
v7: split out init ordering changes (Daniel)
don't fetch config if !CONFIG_FB
v8: use proper height in get_plane_config (Chris)
v9: fix CONFIG_FB check for modular configs (Jani)
Signed-off-by: Jesse Barnes <jbarnes@xxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/i915/i915_drv.h | 3 +
drivers/gpu/drm/i915/intel_display.c | 135 ++++++++++++++++++++++++++++++++++
drivers/gpu/drm/i915/intel_drv.h | 8 ++
3 files changed, 146 insertions(+)
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 728b9c3..bde0b47 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -393,6 +393,7 @@ struct drm_i915_error_state {
struct intel_connector;
struct intel_crtc_config;
+struct intel_plane_config;
struct intel_crtc;
struct intel_limit;
struct dpll;
@@ -431,6 +432,8 @@ struct drm_i915_display_funcs {
* fills out the pipe-config with the hw state. */
bool (*get_pipe_config)(struct intel_crtc *,
struct intel_crtc_config *);
+ void (*get_plane_config)(struct intel_crtc *,
+ struct intel_plane_config *);
int (*crtc_mode_set)(struct drm_crtc *crtc,
int x, int y,
struct drm_framebuffer *old_fb);
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index e2f1db6..2eb1108 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -2033,6 +2033,27 @@ unsigned long intel_gen4_compute_page_offset(int *x, int *y,
}
}
+int intel_format_to_fourcc(int format)
+{
+ switch (format) {
+ case DISPPLANE_8BPP:
+ return DRM_FORMAT_C8;
+ case DISPPLANE_BGRX555:
+ return DRM_FORMAT_XRGB1555;
+ case DISPPLANE_BGRX565:
+ return DRM_FORMAT_RGB565;
+ default:
+ case DISPPLANE_BGRX888:
+ return DRM_FORMAT_XRGB8888;
+ case DISPPLANE_RGBX888:
+ return DRM_FORMAT_XBGR8888;
+ case DISPPLANE_BGRX101010:
+ return DRM_FORMAT_XRGB2101010;
+ case DISPPLANE_RGBX101010:
+ return DRM_FORMAT_XBGR2101010;
+ }
+}
+
static int i9xx_update_plane(struct drm_crtc *crtc, struct drm_framebuffer *fb,
int x, int y)
{
@@ -5517,6 +5538,96 @@ static void vlv_crtc_clock_get(struct intel_crtc *crtc,
pipe_config->port_clock = clock.dot / 5;
}
+static void i9xx_get_plane_config(struct intel_crtc *crtc,
+ struct intel_plane_config *plane_config)
+{
+ struct drm_device *dev = crtc->base.dev;
+ struct drm_i915_private *dev_priv = dev->dev_private;
+ struct drm_i915_gem_object *obj = NULL;
+ struct drm_mode_fb_cmd2 mode_cmd = { 0 };
+ u32 val, base, offset;
+ int pipe = crtc->pipe, plane = crtc->plane;
+ int fourcc, pixel_format;
+ int aligned_height;
+
+ plane_config->fb = kzalloc(sizeof(*plane_config->fb), GFP_KERNEL);
+ if (!plane_config->fb) {
+ DRM_DEBUG_KMS("failed to alloc fb\n");
+ return;
+ }
+
+ val = I915_READ(DSPCNTR(plane));
+
+ if (INTEL_INFO(dev)->gen >= 4)
+ if (val & DISPPLANE_TILED)
+ plane_config->tiled = true;
+
+ pixel_format = val & DISPPLANE_PIXFORMAT_MASK;
+ fourcc = intel_format_to_fourcc(pixel_format);
+ plane_config->fb->base.pixel_format = fourcc;
+ plane_config->fb->base.bits_per_pixel =
+ drm_format_plane_cpp(fourcc, 0) * 8;
+
+ if (INTEL_INFO(dev)->gen >= 4) {
+ if (plane_config->tiled)
+ offset = I915_READ(DSPTILEOFF(plane));
+ else
+ offset = I915_READ(DSPLINOFF(plane));
+ base = I915_READ(DSPSURF(plane)) & 0xfffff000;
+ } else {
+ base = I915_READ(DSPADDR(plane));
+ }
+
+ val = I915_READ(PIPESRC(pipe));
+ plane_config->fb->base.width = ((val >> 16) & 0xfff) + 1;
+ plane_config->fb->base.height = ((val >> 0) & 0xfff) + 1;
+
+ val = I915_READ(DSPSTRIDE(pipe));
+ plane_config->fb->base.pitches[0] = val & 0xffffff80;
+
+ aligned_height = intel_align_height(dev, plane_config->fb->base.height,
+ plane_config->tiled);
+
+ plane_config->size = ALIGN(plane_config->fb->base.pitches[0] *
+ aligned_height, PAGE_SIZE);
+
+ DRM_DEBUG_KMS("pipe/plane %d/%d with fb: size=%dx%d@%d, offset=%x, pitch %d, size 0x%x\n",
+ pipe, plane, plane_config->fb->base.width,
+ plane_config->fb->base.height,
+ plane_config->fb->base.bits_per_pixel, base,
+ plane_config->fb->base.pitches[0],
+ plane_config->size);
+
+ /*
+ * If the fb is shared between multiple heads, we'll just get the
+ * first one.
+ */
+ obj = i915_gem_object_create_stolen_for_preallocated(dev, base, base,
+ plane_config->size);
+ if (!obj)
+ return;
+
+ mode_cmd.pixel_format = fourcc;
+ mode_cmd.width = plane_config->fb->base.width;
+ mode_cmd.height = plane_config->fb->base.height;
+ mode_cmd.pitches[0] = plane_config->fb->base.pitches[0];
+
+ mutex_lock(&dev->struct_mutex);
+
+ if (intel_framebuffer_init(dev, plane_config->fb, &mode_cmd, obj)) {
+ DRM_DEBUG_KMS("intel fb init failed\n");
+ goto out_unref_obj;
+ }
+
+ mutex_unlock(&dev->struct_mutex);
+ DRM_DEBUG_KMS("plane fb obj %p\n", plane_config->fb->obj);
+ return;
+
+out_unref_obj:
+ drm_gem_object_unreference(&obj->base);
+ mutex_unlock(&dev->struct_mutex);
+}
+
static bool i9xx_get_pipe_config(struct intel_crtc *crtc,
struct intel_crtc_config *pipe_config)
{
@@ -10736,6 +10847,7 @@ static void intel_init_display(struct drm_device *dev)
dev_priv->display.update_plane = ironlake_update_plane;
} else if (IS_VALLEYVIEW(dev)) {
dev_priv->display.get_pipe_config = i9xx_get_pipe_config;
+ dev_priv->display.get_plane_config = i9xx_get_plane_config;
dev_priv->display.crtc_mode_set = i9xx_crtc_mode_set;
dev_priv->display.crtc_enable = valleyview_crtc_enable;
dev_priv->display.crtc_disable = i9xx_crtc_disable;
@@ -10743,6 +10855,7 @@ static void intel_init_display(struct drm_device *dev)
dev_priv->display.update_plane = i9xx_update_plane;
} else {
dev_priv->display.get_pipe_config = i9xx_get_pipe_config;
+ dev_priv->display.get_plane_config = i9xx_get_plane_config;
dev_priv->display.crtc_mode_set = i9xx_crtc_mode_set;
dev_priv->display.crtc_enable = i9xx_crtc_enable;
dev_priv->display.crtc_disable = i9xx_crtc_disable;
@@ -11003,6 +11116,7 @@ void intel_modeset_suspend_hw(struct drm_device *dev)
void intel_modeset_init(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;
+ struct intel_crtc *crtc;
int i, j, ret;
drm_mode_config_init(dev);
@@ -11062,6 +11176,27 @@ void intel_modeset_init(struct drm_device *dev)
/* Just in case the BIOS is doing something questionable. */
intel_disable_fbc(dev);
+
+ drm_modeset_lock_all(dev);
+ drm_mode_config_reset(dev);
+ intel_modeset_setup_hw_state(dev, false);
+ drm_modeset_unlock_all(dev);
+
+ list_for_each_entry(crtc, &dev->mode_config.crtc_list,
+ base.head) {
+ if (!crtc->active)
+ continue;
+
+#if IS_ENABLED(CONFIG_FB)
+ /*
+ * We don't have a good way of freeing the buffer w/o the FB
+ * layer owning it...
+ */
+ if (dev_priv->display.get_plane_config)
+ dev_priv->display.get_plane_config(crtc,
+ &crtc->plane_config);
+#endif
+ }
}
static void
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index 44067bc..1e5a0a6 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -210,6 +210,12 @@ typedef struct dpll {
int p;
} intel_clock_t;
+struct intel_plane_config {
+ struct intel_framebuffer *fb; /* ends up managed by intel_fbdev.c */
+ bool tiled;
+ int size;
+};
+
struct intel_crtc_config {
/**
* quirks - bitfield with hw state readout quirks
@@ -358,6 +364,7 @@ struct intel_crtc {
int16_t cursor_width, cursor_height;
bool cursor_visible;
+ struct intel_plane_config plane_config;
struct intel_crtc_config config;
struct intel_crtc_config *new_config;
bool new_enabled;
@@ -727,6 +734,7 @@ void hsw_enable_ips(struct intel_crtc *crtc);
void hsw_disable_ips(struct intel_crtc *crtc);
void intel_display_set_init_power(struct drm_device *dev, bool enable);
int valleyview_get_vco(struct drm_i915_private *dev_priv);
+int intel_format_to_fourcc(int format);
/* intel_dp.c */
void intel_dp_init(struct drm_device *dev, int output_reg, enum port port);
--
1.7.9.5
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