target/linux/brcm2708/patches-4.19/950-0115-drm-vc4-Add-support-for-setting-DPMS-in-firmwarekms.patch

   1 From 9f05f9c3a564cedbb3c5f3dd0d5b95f247b63c71 Mon Sep 17 00:00:00 2001
   2 From: Eric Anholt <eric@anholt.net>
   3 Date: Thu, 6 Jul 2017 11:45:48 -0700
   4 Subject: [PATCH 115/703] drm/vc4: Add support for setting DPMS in firmwarekms.
   5
   6 This ensures that the screen goes blank during DPMS (screensaver),
   7 including the cursor.  Planes don't necessarily get disabled during
   8 CRTC disable, so we need to be careful to not leave them on or turn
   9 them back on early.
  10
  11 Signed-off-by: Eric Anholt <eric@anholt.net>
  12 ---
  13  drivers/gpu/drm/vc4/vc4_firmware_kms.c | 40 ++++++++++++++++++++++++--
  14  1 file changed, 37 insertions(+), 3 deletions(-)
  15
  16 --- a/drivers/gpu/drm/vc4/vc4_firmware_kms.c
  17 +++ b/drivers/gpu/drm/vc4/vc4_firmware_kms.c
  18 @@ -36,6 +36,8 @@ struct vc4_crtc {
  19         struct drm_crtc base;
  20         struct drm_encoder *encoder;
  21         struct drm_connector *connector;
  22 +       struct drm_plane *primary;
  23 +       struct drm_plane *cursor;
  24         void __iomem *regs;
  25
  26         struct drm_pending_vblank_event *event;
  27 @@ -123,8 +125,6 @@ static void vc4_primary_plane_atomic_upd
  28         u32 bpp = 32;
  29         int ret;
  30
  31 -       vc4_plane_set_primary_blank(plane, false);
  32 -
  33         fbinfo->xres = state->crtc_w;
  34         fbinfo->yres = state->crtc_h;
  35         fbinfo->xres_virtual = state->crtc_w;
  36 @@ -168,6 +168,12 @@ static void vc4_primary_plane_atomic_upd
  37                                        vc4_plane->fbinfo_bus_addr);
  38         WARN_ON_ONCE(fbinfo->pitch != fb->pitches[0]);
  39         WARN_ON_ONCE(fbinfo->base != bo->paddr + fb->offsets[0]);
  40 +
  41 +       /* If the CRTC is on (or going to be on) and we're enabled,
  42 +        * then unblank.  Otherwise, stay blank until CRTC enable.
  43 +       */
  44 +       if (state->crtc->state->active)
  45 +               vc4_plane_set_primary_blank(plane, false);
  46  }
  47
  48  static void vc4_primary_plane_atomic_disable(struct drm_plane *plane,
  49 @@ -184,7 +190,12 @@ static void vc4_cursor_plane_atomic_upda
  50         struct drm_framebuffer *fb = state->fb;
  51         struct drm_gem_cma_object *bo = drm_fb_cma_get_gem_obj(fb, 0);
  52         int ret;
  53 -       u32 packet_state[] = { true, state->crtc_x, state->crtc_y, 0 };
  54 +       u32 packet_state[] = {
  55 +               state->crtc->state->active,
  56 +               state->crtc_x,
  57 +               state->crtc_y,
  58 +               0
  59 +       };
  60         u32 packet_info[] = { state->crtc_w, state->crtc_h,
  61                               0, /* unused */
  62                               bo->paddr + fb->offsets[0],
  63 @@ -321,10 +332,30 @@ static void vc4_crtc_mode_set_nofb(struc
  64
  65  static void vc4_crtc_disable(struct drm_crtc *crtc, struct drm_crtc_state *old_state)
  66  {
  67 +       struct vc4_crtc *vc4_crtc = to_vc4_crtc(crtc);
  68 +
  69 +       /* Always turn the planes off on CRTC disable. In DRM, planes
  70 +        * are enabled/disabled through the update/disable hooks
  71 +        * above, and the CRTC enable/disable independently controls
  72 +        * whether anything scans out at all, but the firmware doesn't
  73 +        * give us a CRTC-level control for that.
  74 +        */
  75 +       vc4_cursor_plane_atomic_disable(vc4_crtc->cursor,
  76 +                                       vc4_crtc->cursor->state);
  77 +       vc4_plane_set_primary_blank(vc4_crtc->primary, true);
  78  }
  79
  80  static void vc4_crtc_enable(struct drm_crtc *crtc, struct drm_crtc_state *old_state)
  81  {
  82 +       struct vc4_crtc *vc4_crtc = to_vc4_crtc(crtc);
  83 +
  84 +       /* Unblank the planes (if they're supposed to be displayed). */
  85 +       if (vc4_crtc->primary->state->fb)
  86 +               vc4_plane_set_primary_blank(vc4_crtc->primary, false);
  87 +       if (vc4_crtc->cursor->state->fb) {
  88 +               vc4_cursor_plane_atomic_update(vc4_crtc->cursor,
  89 +                                              vc4_crtc->cursor->state);
  90 +       }
  91  }
  92
  93  static int vc4_crtc_atomic_check(struct drm_crtc *crtc,
  94 @@ -618,6 +649,9 @@ static int vc4_fkms_bind(struct device *
  95         primary_plane->crtc = crtc;
  96         cursor_plane->crtc = crtc;
  97
  98 +       vc4_crtc->primary = primary_plane;
  99 +       vc4_crtc->cursor = cursor_plane;
 100 +
 101         vc4_encoder = devm_kzalloc(dev, sizeof(*vc4_encoder), GFP_KERNEL);
 102         if (!vc4_encoder)
 103                 return -ENOMEM;