[Intel-gfx] [PATCH v3 4/7] drm/fb-helper: Apply panel orientation connector prop to the primary plane
Daniel Vetter
daniel at ffwll.ch
Mon Oct 30 09:52:12 UTC 2017
On Mon, Oct 23, 2017 at 09:14:22AM +0200, Hans de Goede wrote:
> Apply the "panel orientation" drm connector prop to the primary plane so
> that fbcon and fbdev using userspace programs display the right way up.
>
> Fixes: https://bugs.freedesktop.org/show_bug.cgi?id=94894
> Signed-off-by: Hans de Goede <hdegoede at redhat.com>
> ---
> Changes in v2:
> -New patch in v2 of this patch-set
>
> Changes in v3:
> -Use a rotation member in struct drm_fb_helper_crtc and set that from
> drm_setup_crtcs instead of looping over all crtc's to find the right one
> later
> -Since we now no longer look at rotation quirks directly in the fbcon code,
> set fb_info.fbcon_rotate_hint when the panel is not mounted upright and
> we cannot use hardware rotation
> ---
> drivers/gpu/drm/drm_fb_helper.c | 76 +++++++++++++++++++++++++++++++++++++++--
> include/drm/drm_fb_helper.h | 8 +++++
> 2 files changed, 82 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/gpu/drm/drm_fb_helper.c b/drivers/gpu/drm/drm_fb_helper.c
> index 116d1f1337c7..e0f95f2cc52f 100644
> --- a/drivers/gpu/drm/drm_fb_helper.c
> +++ b/drivers/gpu/drm/drm_fb_helper.c
> @@ -41,6 +41,7 @@
> #include <drm/drm_atomic.h>
> #include <drm/drm_atomic_helper.h>
>
> +#include "drm_crtc_internal.h"
> #include "drm_crtc_helper_internal.h"
>
> static bool drm_fbdev_emulation = true;
> @@ -350,6 +351,7 @@ EXPORT_SYMBOL(drm_fb_helper_debug_leave);
> static int restore_fbdev_mode_atomic(struct drm_fb_helper *fb_helper, bool active)
> {
> struct drm_device *dev = fb_helper->dev;
> + struct drm_plane_state *plane_state;
> struct drm_plane *plane;
> struct drm_atomic_state *state;
> int i, ret;
> @@ -368,8 +370,6 @@ static int restore_fbdev_mode_atomic(struct drm_fb_helper *fb_helper, bool activ
> retry:
> plane_mask = 0;
> drm_for_each_plane(plane, dev) {
> - struct drm_plane_state *plane_state;
> -
> plane_state = drm_atomic_get_plane_state(state, plane);
> if (IS_ERR(plane_state)) {
> ret = PTR_ERR(plane_state);
> @@ -392,6 +392,11 @@ static int restore_fbdev_mode_atomic(struct drm_fb_helper *fb_helper, bool activ
>
> for (i = 0; i < fb_helper->crtc_count; i++) {
> struct drm_mode_set *mode_set = &fb_helper->crtc_info[i].mode_set;
> + struct drm_plane *primary = mode_set->crtc->primary;
> +
> + /* Cannot fail as we've already gotten the plane state above */
> + plane_state = drm_atomic_get_new_plane_state(state, primary);
> + plane_state->rotation = fb_helper->crtc_info[i].rotation;
>
> ret = __drm_atomic_helper_set_config(mode_set, state);
> if (ret != 0)
> @@ -2334,6 +2339,57 @@ static int drm_pick_crtcs(struct drm_fb_helper *fb_helper,
> return best_score;
> }
>
> +/*
> + * This function checks if rotation is necessary because of panel orientation
> + * and if it is, if it is supported.
> + * If rotation is necessary and supported, its gets set in fb_crtc.rotation.
> + * If rotation is necessary but not supported, a DRM_MODE_ROTATE_* flag gets
> + * or-ed into fb_helper->rotations. In drm_setup_crtcs_fb() we check if only
> + * one bit is set and then we set fb_info.fbcon_rotate_hint to make fbcon do
> + * the unsupported rotation.
> + */
> +static void drm_setup_crtc_rotation(struct drm_fb_helper *fb_helper,
> + struct drm_fb_helper_crtc *fb_crtc,
> + struct drm_connector *connector)
> +{
> + struct drm_plane *plane = fb_crtc->mode_set.crtc->primary;
> + uint64_t valid_mask = 0;
> + int i, rotation;
> +
> + fb_crtc->rotation = DRM_MODE_ROTATE_0;
> +
> + switch (connector->display_info.panel_orientation) {
> + case DRM_MODE_PANEL_ORIENTATION_BOTTOM_UP:
> + rotation = DRM_MODE_ROTATE_180;
> + break;
> + case DRM_MODE_PANEL_ORIENTATION_LEFT_UP:
> + rotation = DRM_MODE_ROTATE_90;
> + break;
> + case DRM_MODE_PANEL_ORIENTATION_RIGHT_UP:
> + rotation = DRM_MODE_ROTATE_270;
> + break;
For 90/270 hw rotation you need to flip the coordinates/sizes of the fb.
> + default:
> + rotation = DRM_MODE_ROTATE_0;
> + }
> +
> + if (rotation == DRM_MODE_ROTATE_0 || !plane->rotation_property) {
> + fb_helper->rotations |= rotation;
> + return;
> + }
> +
> + for (i = 0; i < plane->rotation_property->num_values; i++)
> + valid_mask |= (1ULL << plane->rotation_property->values[i]);
This isn't a good enough check for atomic drivers (and not for gen9+ intel
hw), since we might expose 90° rotations, but it only works if you have
the correct tiling format.
For atomic drivers it'd be really good if we could do a TEST_ONLY commit
first, and if that fails, fall back to sw rotation.
But that poses a bit a chicken&egg with creating the framebuffer (we need
one for the TEST_ONLY), so probably a bit too much more for this. And
afaiui your quirk list only applies to older stuff.
At least add a FIXME meanwhile? In a way we have a FIXME already for
multi-pipe, since we don't try to fall back to fewer pipes if the single
atomic commit failed.
Or maybe just don't use 90/270 hw rotation for now since it seems buggy in
your code anyway.
> +
> + if (!(rotation & valid_mask)) {
> + fb_helper->rotations |= rotation;
> + return;
> + }
> +
> + fb_crtc->rotation = rotation;
> + /* Rotating in hardware, fbcon should not rotate */
> + fb_helper->rotations |= DRM_MODE_ROTATE_0;
Wrong bitopt I think.
Or you're doing some really funny control logic by oring in another value
to hit the default case below which doesn't rotate anything. I think that
should be done explicitly, by explicitly setting to rotation to ROTATE_0
instead of this. Same for the check above.
> +}
> +
> static void drm_setup_crtcs(struct drm_fb_helper *fb_helper,
> u32 width, u32 height)
> {
> @@ -2393,6 +2449,7 @@ static void drm_setup_crtcs(struct drm_fb_helper *fb_helper,
> drm_fb_helper_modeset_release(fb_helper,
> &fb_helper->crtc_info[i].mode_set);
>
> + fb_helper->rotations = 0;
> drm_fb_helper_for_each_connector(fb_helper, i) {
> struct drm_display_mode *mode = modes[i];
> struct drm_fb_helper_crtc *fb_crtc = crtcs[i];
> @@ -2412,6 +2469,7 @@ static void drm_setup_crtcs(struct drm_fb_helper *fb_helper,
> modeset->mode = drm_mode_duplicate(dev,
> fb_crtc->desired_mode);
> drm_connector_get(connector);
> + drm_setup_crtc_rotation(fb_helper, fb_crtc, connector);
> modeset->connectors[modeset->num_connectors++] = connector;
> modeset->x = offset->x;
> modeset->y = offset->y;
> @@ -2453,6 +2511,20 @@ static void drm_setup_crtcs_fb(struct drm_fb_helper *fb_helper)
> }
> }
> mutex_unlock(&fb_helper->dev->mode_config.mutex);
> +
> + switch (fb_helper->rotations) {
> + case DRM_MODE_ROTATE_90:
> + info->fbcon_rotate_hint = FB_ROTATE_CCW;
> + break;
> + case DRM_MODE_ROTATE_180:
> + info->fbcon_rotate_hint = FB_ROTATE_UD;
> + break;
> + case DRM_MODE_ROTATE_270:
> + info->fbcon_rotate_hint = FB_ROTATE_CW;
> + break;
> + default:
> + info->fbcon_rotate_hint = FB_ROTATE_UR;
> + }
> }
>
> /* Note: Drops fb_helper->lock before returning. */
> diff --git a/include/drm/drm_fb_helper.h b/include/drm/drm_fb_helper.h
> index 33fe95927742..4ee834a077a2 100644
> --- a/include/drm/drm_fb_helper.h
> +++ b/include/drm/drm_fb_helper.h
> @@ -48,6 +48,7 @@ struct drm_fb_helper_crtc {
> struct drm_mode_set mode_set;
> struct drm_display_mode *desired_mode;
> int x, y;
> + int rotation;
> };
>
> /**
> @@ -158,6 +159,13 @@ struct drm_fb_helper {
> struct drm_fb_helper_crtc *crtc_info;
> int connector_count;
> int connector_info_alloc_count;
> + /**
> + * @rotations:
> + * Bitmask of all rotations requested for panel-orientation which
> + * could not be handled in hardware. If only one bit is set
> + * fbdev->fbcon_rotate_hint gets set to the requested rotation.
> + */
> + int rotations;
> /**
> * @connector_info:
> *
> --
> 2.14.2
>
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> Intel-gfx at lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/intel-gfx
--
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch
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