On Tue, Jan 12, 2016 at 10:34:27AM +0100, Marek Szyprowski wrote:
> Hello,
>
> On 2016-01-11 16:13, Daniel Vetter wrote:
> >On Mon, Jan 11, 2016 at 12:03:04PM +0100, Marek Szyprowski wrote:
> >>This patch replaces zpos property handling custom code in Exynos DRM
> >>driver with calls to generic DRM code.
> >>
> >>Signed-off-by: Marek Szyprowski <m.szyprowski@xxxxxxxxxxx>
> >>---
> >> drivers/gpu/drm/exynos/exynos_drm_drv.h | 1 -
> >> drivers/gpu/drm/exynos/exynos_drm_plane.c | 66 +++++++------------------------
> >> drivers/gpu/drm/exynos/exynos_mixer.c | 19 +++++++--
> >> 3 files changed, 30 insertions(+), 56 deletions(-)
> >>
> >>diff --git a/drivers/gpu/drm/exynos/exynos_drm_drv.h b/drivers/gpu/drm/exynos/exynos_drm_drv.h
> >>index 17b5ded72ff1..244ae6c4482c 100644
> >>--- a/drivers/gpu/drm/exynos/exynos_drm_drv.h
> >>+++ b/drivers/gpu/drm/exynos/exynos_drm_drv.h
> >>@@ -217,7 +217,6 @@ struct exynos_drm_private {
> >> * this array is used to be aware of which crtc did it request vblank.
> >> */
> >> struct drm_crtc *crtc[MAX_CRTC];
> >>- struct drm_property *plane_zpos_property;
> >> unsigned long da_start;
> >> unsigned long da_space_size;
> >>diff --git a/drivers/gpu/drm/exynos/exynos_drm_plane.c b/drivers/gpu/drm/exynos/exynos_drm_plane.c
> >>index d86227236f55..ba46bc3de796 100644
> >>--- a/drivers/gpu/drm/exynos/exynos_drm_plane.c
> >>+++ b/drivers/gpu/drm/exynos/exynos_drm_plane.c
> >>@@ -137,9 +137,9 @@ static void exynos_drm_plane_reset(struct drm_plane *plane)
> >> exynos_state = kzalloc(sizeof(*exynos_state), GFP_KERNEL);
> >> if (exynos_state) {
> >>- exynos_state->zpos = exynos_plane->config->zpos;
> >> plane->state = &exynos_state->base;
> >> plane->state->plane = plane;
> >>+ plane->state->zpos = exynos_plane->config->zpos;
> >> }
> >> }
> >>@@ -155,7 +155,6 @@ exynos_drm_plane_duplicate_state(struct drm_plane *plane)
> >> return NULL;
> >> __drm_atomic_helper_plane_duplicate_state(plane, ©->base);
> >>- copy->zpos = exynos_state->zpos;
> >> return ©->base;
> >> }
> >>@@ -168,43 +167,6 @@ static void exynos_drm_plane_destroy_state(struct drm_plane *plane,
> >> kfree(old_exynos_state);
> >> }
> >>-static int exynos_drm_plane_atomic_set_property(struct drm_plane *plane,
> >>- struct drm_plane_state *state,
> >>- struct drm_property *property,
> >>- uint64_t val)
> >>-{
> >>- struct exynos_drm_plane *exynos_plane = to_exynos_plane(plane);
> >>- struct exynos_drm_plane_state *exynos_state =
> >>- to_exynos_plane_state(state);
> >>- struct exynos_drm_private *dev_priv = plane->dev->dev_private;
> >>- const struct exynos_drm_plane_config *config = exynos_plane->config;
> >>-
> >>- if (property == dev_priv->plane_zpos_property &&
> >>- (config->capabilities & EXYNOS_DRM_PLANE_CAP_ZPOS))
> >>- exynos_state->zpos = val;
> >>- else
> >>- return -EINVAL;
> >>-
> >>- return 0;
> >>-}
> >>-
> >>-static int exynos_drm_plane_atomic_get_property(struct drm_plane *plane,
> >>- const struct drm_plane_state *state,
> >>- struct drm_property *property,
> >>- uint64_t *val)
> >>-{
> >>- const struct exynos_drm_plane_state *exynos_state =
> >>- container_of(state, const struct exynos_drm_plane_state, base);
> >>- struct exynos_drm_private *dev_priv = plane->dev->dev_private;
> >>-
> >>- if (property == dev_priv->plane_zpos_property)
> >>- *val = exynos_state->zpos;
> >>- else
> >>- return -EINVAL;
> >>-
> >>- return 0;
> >>-}
> >>-
> >> static struct drm_plane_funcs exynos_plane_funcs = {
> >> .update_plane = drm_atomic_helper_update_plane,
> >> .disable_plane = drm_atomic_helper_disable_plane,
> >>@@ -213,8 +175,6 @@ static struct drm_plane_funcs exynos_plane_funcs = {
> >> .reset = exynos_drm_plane_reset,
> >> .atomic_duplicate_state = exynos_drm_plane_duplicate_state,
> >> .atomic_destroy_state = exynos_drm_plane_destroy_state,
> >>- .atomic_set_property = exynos_drm_plane_atomic_set_property,
> >>- .atomic_get_property = exynos_drm_plane_atomic_get_property,
> >> };
> >> static int
> >>@@ -302,20 +262,21 @@ static const struct drm_plane_helper_funcs plane_helper_funcs = {
> >> };
> >> static void exynos_plane_attach_zpos_property(struct drm_plane *plane,
> >>- unsigned int zpos)
> >>+ unsigned int zpos, bool immutable)
> >> {
> >> struct drm_device *dev = plane->dev;
> >>- struct exynos_drm_private *dev_priv = dev->dev_private;
> >> struct drm_property *prop;
> >>- prop = dev_priv->plane_zpos_property;
> >>- if (!prop) {
> >>- prop = drm_property_create_range(dev, 0, "zpos",
> >>- 0, MAX_PLANE - 1);
> >>- if (!prop)
> >>- return;
> >>-
> >>- dev_priv->plane_zpos_property = prop;
> >>+ if (immutable) {
> >>+ if (!dev->mode_config.zpos_immutable_property)
> >>+ if (!drm_mode_create_zpos_immutable_property(dev))
> >>+ return;
> >>+ prop = dev->mode_config.zpos_immutable_property;
> >>+ } else {
> >>+ if (!dev->mode_config.zpos_property)
> >>+ if (!drm_mode_create_zpos_property(dev))
> >>+ return;
> >>+ prop = dev->mode_config.zpos_property;
> >> }
> >> drm_object_attach_property(&plane->base, prop, zpos);
> >>@@ -344,7 +305,8 @@ int exynos_plane_init(struct drm_device *dev,
> >> exynos_plane->index = index;
> >> exynos_plane->config = config;
> >>- exynos_plane_attach_zpos_property(&exynos_plane->base, config->zpos);
> >>+ exynos_plane_attach_zpos_property(&exynos_plane->base, config->zpos,
> >>+ !(config->capabilities & EXYNOS_DRM_PLANE_CAP_ZPOS));
> >> return 0;
> >> }
> >>diff --git a/drivers/gpu/drm/exynos/exynos_mixer.c b/drivers/gpu/drm/exynos/exynos_mixer.c
> >>index b5fbc1cbf024..6ab68eca0004 100644
> >>--- a/drivers/gpu/drm/exynos/exynos_mixer.c
> >>+++ b/drivers/gpu/drm/exynos/exynos_mixer.c
> >>@@ -34,6 +34,7 @@
> >> #include <linux/component.h>
> >> #include <drm/exynos_drm.h>
> >>+#include <drm/drm_atomic_helper.h>
> >> #include "exynos_drm_drv.h"
> >> #include "exynos_drm_crtc.h"
> >>@@ -95,6 +96,8 @@ struct mixer_context {
> >> struct drm_device *drm_dev;
> >> struct exynos_drm_crtc *crtc;
> >> struct exynos_drm_plane planes[MIXER_WIN_NR];
> >>+ struct drm_plane *zpos_planes[MIXER_WIN_NR];
> >>+ int num_planes;
> >> int pipe;
> >> unsigned long flags;
> >> bool interlace;
> >>@@ -478,6 +481,7 @@ static void vp_video_buffer(struct mixer_context *ctx,
> >> struct drm_display_mode *mode = &state->base.crtc->state->adjusted_mode;
> >> struct mixer_resources *res = &ctx->mixer_res;
> >> struct drm_framebuffer *fb = state->base.fb;
> >>+ unsigned int priority = state->base.normalized_zpos + 1;
> >> unsigned long flags;
> >> dma_addr_t luma_addr[2], chroma_addr[2];
> >> bool tiled_mode = false;
> >>@@ -562,7 +566,7 @@ static void vp_video_buffer(struct mixer_context *ctx,
> >> mixer_cfg_scan(ctx, mode->vdisplay);
> >> mixer_cfg_rgb_fmt(ctx, mode->vdisplay);
> >>- mixer_cfg_layer(ctx, plane->index, state->zpos + 1, true);
> >>+ mixer_cfg_layer(ctx, plane->index, priority, true);
> >> mixer_cfg_vp_blend(ctx);
> >> mixer_run(ctx);
> >>@@ -587,6 +591,7 @@ static void mixer_graph_buffer(struct mixer_context *ctx,
> >> struct drm_display_mode *mode = &state->base.crtc->state->adjusted_mode;
> >> struct mixer_resources *res = &ctx->mixer_res;
> >> struct drm_framebuffer *fb = state->base.fb;
> >>+ unsigned int priority = state->base.normalized_zpos + 1;
> >> unsigned long flags;
> >> unsigned int win = plane->index;
> >> unsigned int x_ratio = 0, y_ratio = 0;
> >>@@ -678,7 +683,7 @@ static void mixer_graph_buffer(struct mixer_context *ctx,
> >> mixer_cfg_scan(ctx, mode->vdisplay);
> >> mixer_cfg_rgb_fmt(ctx, mode->vdisplay);
> >>- mixer_cfg_layer(ctx, win, state->zpos + 1, true);
> >>+ mixer_cfg_layer(ctx, win, priority, true);
> >> mixer_cfg_gfx_blend(ctx, win, is_alpha_format(fb->pixel_format));
> >> /* layer update mandatory for mixer 16.0.33.0 */
> >>@@ -981,6 +986,12 @@ static void mixer_atomic_begin(struct exynos_drm_crtc *crtc)
> >> if (!test_bit(MXR_BIT_POWERED, &mixer_ctx->flags))
> >> return;
> >>+ /*
> >>+ * Normalizing up to 3 planes is cheap, no need for checking
> >>+ * if zpos has been really changed.
> >>+ */
> >>+ drm_atomic_helper_normalize_zpos(mixer_ctx->zpos_planes,
> >>+ mixer_ctx->num_planes);
> >Hm, this is a bit a cumbersome interface for drivers and will make
> >converting over to the normalized zpos more work. Can't we handle this in
> >the atomic helpers directly? I'm thinking of the following flow:
> >
> >- if new_plane_state->zpos != old_plane_state->zpos then set new_crtc_state->zpos_changed
> >- if new_crtc_state->plane_mask != old_crtc_state->plane_mask ||
> > new_crtc_state->zpos_changed then recompute normilized zpos.
> >
> >Imo that would fit well in drm_atomic_helper_check_planes().
> >
> >With that bit of additional logic drivers can just use normlized_zpos and
> >don't need to care about anything really.
>
> Okay, I will try to implement this logic.
Just to avoid another respin: If you do so I think it still makes sense to
export the current set of functions, for drivers which don't use helpers
or need to figure out the normalized zpos earlier or whatever.
-Daniel
--
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch
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