[Intel-gfx] [RFC v4 03/25] drm/fb-helper: No need to cache rotation and sw_rotations
Hans de Goede
hdegoede at redhat.com
Fri Apr 13 17:07:25 UTC 2018
Hi Noralf,
1 comment inline.
On 13-04-18 18:53, Noralf Trønnes wrote:
> Getting rotation info is cheap so we can do it on demand.
>
> This is done in preparation for the removal of struct drm_fb_helper_crtc.
>
> Cc: Hans de Goede <hdegoede at redhat.com>
> Signed-off-by: Noralf Trønnes <noralf at tronnes.org>
> ---
> drivers/gpu/drm/drm_fb_helper.c | 131 ++++++++++++++++++++--------------------
> include/drm/drm_fb_helper.h | 8 ---
> 2 files changed, 65 insertions(+), 74 deletions(-)
>
> diff --git a/drivers/gpu/drm/drm_fb_helper.c b/drivers/gpu/drm/drm_fb_helper.c
> index 0646b108030b..e48ace2d55f5 100644
> --- a/drivers/gpu/drm/drm_fb_helper.c
> +++ b/drivers/gpu/drm/drm_fb_helper.c
> @@ -361,6 +361,48 @@ int drm_fb_helper_debug_leave(struct fb_info *info)
> }
> EXPORT_SYMBOL(drm_fb_helper_debug_leave);
>
> +/* Check if the plane can hw rotate to match panel orientation */
> +static bool drm_fb_helper_panel_rotation(struct drm_connector *connector,
> + struct drm_plane *plane,
> + unsigned int *rotation)
> +{
> + uint64_t valid_mask = 0;
> + unsigned int i;
> +
> + if (!connector)
> + return false;
> +
> + 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;
> + default:
> + *rotation = DRM_MODE_ROTATE_0;
> + }
> +
> + /*
> + * TODO: support 90 / 270 degree hardware rotation,
> + * depending on the hardware this may require the framebuffer
> + * to be in a specific tiling format.
> + */
> + if (*rotation != DRM_MODE_ROTATE_180 || !plane->rotation_property)
> + return false;
> +
> + for (i = 0; i < plane->rotation_property->num_values; i++)
> + valid_mask |= (1ULL << plane->rotation_property->values[i]);
> +
> + if (!(*rotation & valid_mask))
> + return false;
> +
> + return true;
> +}
> +
> static int restore_fbdev_mode_atomic(struct drm_fb_helper *fb_helper, bool active)
> {
> struct drm_device *dev = fb_helper->dev;
> @@ -406,10 +448,13 @@ 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;
> + unsigned int rotation;
>
> - /* 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;
> + if (drm_fb_helper_panel_rotation(mode_set->connectors[0], primary, &rotation)) {
> + /* Cannot fail as we've already gotten the plane state above */
> + plane_state = drm_atomic_get_new_plane_state(state, primary);
> + plane_state->rotation = rotation;
> + }
We want plane_state->rotation to be set to DRM_MODE_ROTATE_0 in the else
case, AFAIK new_plane_state starts with the current state and rotation
may have a different value there.
Otherwise this looks good to me.
Regards,
Hans
> ret = __drm_atomic_helper_set_config(mode_set, state);
> if (ret != 0)
> @@ -841,7 +886,6 @@ int drm_fb_helper_init(struct drm_device *dev,
> if (!fb_helper->crtc_info[i].mode_set.connectors)
> goto out_free;
> fb_helper->crtc_info[i].mode_set.num_connectors = 0;
> - fb_helper->crtc_info[i].rotation = DRM_MODE_ROTATE_0;
> }
>
> i = 0;
> @@ -2414,62 +2458,6 @@ 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->sw_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;
> - default:
> - rotation = DRM_MODE_ROTATE_0;
> - }
> -
> - /*
> - * TODO: support 90 / 270 degree hardware rotation,
> - * depending on the hardware this may require the framebuffer
> - * to be in a specific tiling format.
> - */
> - if (rotation != DRM_MODE_ROTATE_180 || !plane->rotation_property) {
> - fb_helper->sw_rotations |= rotation;
> - return;
> - }
> -
> - for (i = 0; i < plane->rotation_property->num_values; i++)
> - valid_mask |= (1ULL << plane->rotation_property->values[i]);
> -
> - if (!(rotation & valid_mask)) {
> - fb_helper->sw_rotations |= rotation;
> - return;
> - }
> -
> - fb_crtc->rotation = rotation;
> - /* Rotating in hardware, fbcon should not rotate */
> - fb_helper->sw_rotations |= DRM_MODE_ROTATE_0;
> -}
> -
> static void drm_setup_crtcs(struct drm_fb_helper *fb_helper,
> u32 width, u32 height)
> {
> @@ -2529,7 +2517,6 @@ 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->sw_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];
> @@ -2549,7 +2536,6 @@ 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;
> @@ -2572,11 +2558,24 @@ static void drm_setup_crtcs(struct drm_fb_helper *fb_helper,
> static void drm_setup_crtcs_fb(struct drm_fb_helper *fb_helper)
> {
> struct fb_info *info = fb_helper->fbdev;
> + unsigned int rotation, sw_rotations = 0;
> int i;
>
> - for (i = 0; i < fb_helper->crtc_count; i++)
> - if (fb_helper->crtc_info[i].mode_set.num_connectors)
> - fb_helper->crtc_info[i].mode_set.fb = fb_helper->fb;
> + for (i = 0; i < fb_helper->crtc_count; i++) {
> + struct drm_mode_set *modeset = &fb_helper->crtc_info[i].mode_set;
> +
> + if (!modeset->num_connectors)
> + continue;
> +
> + modeset->fb = fb_helper->fb;
> +
> + if (drm_fb_helper_panel_rotation(modeset->connectors[0],
> + modeset->crtc->primary, &rotation))
> + /* Rotating in hardware, fbcon should not rotate */
> + sw_rotations |= DRM_MODE_ROTATE_0;
> + else
> + sw_rotations |= rotation;
> + }
>
> mutex_lock(&fb_helper->dev->mode_config.mutex);
> drm_fb_helper_for_each_connector(fb_helper, i) {
> @@ -2592,7 +2591,7 @@ static void drm_setup_crtcs_fb(struct drm_fb_helper *fb_helper)
> }
> mutex_unlock(&fb_helper->dev->mode_config.mutex);
>
> - switch (fb_helper->sw_rotations) {
> + switch (sw_rotations) {
> case DRM_MODE_ROTATE_0:
> info->fbcon_rotate_hint = FB_ROTATE_UR;
> break;
> diff --git a/include/drm/drm_fb_helper.h b/include/drm/drm_fb_helper.h
> index b069433e7fc1..d1e45c832cd5 100644
> --- a/include/drm/drm_fb_helper.h
> +++ b/include/drm/drm_fb_helper.h
> @@ -49,7 +49,6 @@ struct drm_fb_helper_crtc {
> struct drm_mode_set mode_set;
> struct drm_display_mode *desired_mode;
> int x, y;
> - int rotation;
> };
>
> /**
> @@ -160,13 +159,6 @@ struct drm_fb_helper {
> struct drm_fb_helper_crtc *crtc_info;
> int connector_count;
> int connector_info_alloc_count;
> - /**
> - * @sw_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 sw_rotations;
> /**
> * @connector_info:
> *
>
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