nv30: avoid doing extra work on clear and hitting unexpected states

Clearing can happen at a time when various state objects are incoherent
and not ready for a draw. Some of the validation functions don't handle
this well, so only flush the framebuffer state. This has the advantage
of also not doing extra work.

This works around some crashes that can happen when clearing.

Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu>
Reviewed-by: Tobias Klausmann <tobias.johannes.klausmann@mni.thm.de>

5 files changed, 11 insertions, 9 deletions

diff --git a/src/gallium/drivers/nouveau/nv30/nv30_clear.c b/src/gallium/drivers/nouveau/nv30/nv30_clear.c
index 1ab8929cc38..83fd1fa38dd 100644
--- a/src/gallium/drivers/nouveau/nv30/nv30_clear.c
+++ b/src/gallium/drivers/nouveau/nv30/nv30_clear.c
@@ -58,7 +58,7 @@ nv30_clear(struct pipe_context *pipe, unsigned buffers,
    struct pipe_framebuffer_state *fb = &nv30->framebuffer;
    uint32_t colr = 0, zeta = 0, mode = 0;
 
-   if (!nv30_state_validate(nv30, TRUE))
+   if (!nv30_state_validate(nv30, NV30_NEW_FRAMEBUFFER | NV30_NEW_SCISSOR, TRUE))
       return;
 
    if (buffers & PIPE_CLEAR_COLOR && fb->nr_cbufs) {
diff --git a/src/gallium/drivers/nouveau/nv30/nv30_context.h b/src/gallium/drivers/nouveau/nv30/nv30_context.h
index 7b32aaee936..592cdbe24f9 100644
--- a/src/gallium/drivers/nouveau/nv30/nv30_context.h
+++ b/src/gallium/drivers/nouveau/nv30/nv30_context.h
@@ -204,7 +204,7 @@ void
 nv30_render_vbo(struct pipe_context *pipe, const struct pipe_draw_info *info);
 
 boolean
-nv30_state_validate(struct nv30_context *nv30, boolean hwtnl);
+nv30_state_validate(struct nv30_context *nv30, uint32_t mask, boolean hwtnl);
 
 void
 nv30_state_release(struct nv30_context *nv30);
diff --git a/src/gallium/drivers/nouveau/nv30/nv30_draw.c b/src/gallium/drivers/nouveau/nv30/nv30_draw.c
index 13aad7a4e09..74f0d66df95 100644
--- a/src/gallium/drivers/nouveau/nv30/nv30_draw.c
+++ b/src/gallium/drivers/nouveau/nv30/nv30_draw.c
@@ -130,7 +130,7 @@ nv30_render_draw_elements(struct vbuf_render *render,
                        NOUVEAU_BO_LOW | NOUVEAU_BO_RD, 0, 0);
    }
 
-   if (!nv30_state_validate(nv30, FALSE))
+   if (!nv30_state_validate(nv30, ~0, FALSE))
       return;
 
    BEGIN_NV04(push, NV30_3D(VERTEX_BEGIN_END), 1);
@@ -175,7 +175,7 @@ nv30_render_draw_arrays(struct vbuf_render *render, unsigned start, uint nr)
                        NOUVEAU_BO_LOW | NOUVEAU_BO_RD, 0, 0);
    }
 
-   if (!nv30_state_validate(nv30, FALSE))
+   if (!nv30_state_validate(nv30, ~0, FALSE))
       return;
 
    BEGIN_NV04(push, NV30_3D(VERTEX_BEGIN_END), 1);
diff --git a/src/gallium/drivers/nouveau/nv30/nv30_state_validate.c b/src/gallium/drivers/nouveau/nv30/nv30_state_validate.c
index 0f9d19dd68e..86ac4f7d6fd 100644
--- a/src/gallium/drivers/nouveau/nv30/nv30_state_validate.c
+++ b/src/gallium/drivers/nouveau/nv30/nv30_state_validate.c
@@ -456,7 +456,7 @@ nv30_state_context_switch(struct nv30_context *nv30)
 }
 
 boolean
-nv30_state_validate(struct nv30_context *nv30, boolean hwtnl)
+nv30_state_validate(struct nv30_context *nv30, uint32_t mask, boolean hwtnl)
 {
    struct nouveau_screen *screen = &nv30->screen->base;
    struct nouveau_pushbuf *push = nv30->base.pushbuf;
@@ -481,14 +481,16 @@ nv30_state_validate(struct nv30_context *nv30, boolean hwtnl)
    else
       validate = swtnl_validate_list;
 
-   if (nv30->dirty) {
+   mask &= nv30->dirty;
+
+   if (mask) {
       while (validate->func) {
-         if (nv30->dirty & validate->mask)
+         if (mask & validate->mask)
             validate->func(nv30);
          validate++;
       }
 
-      nv30->dirty = 0;
+      nv30->dirty &= ~mask;
    }
 
    nouveau_pushbuf_bufctx(push, bctx);
diff --git a/src/gallium/drivers/nouveau/nv30/nv30_vbo.c b/src/gallium/drivers/nouveau/nv30/nv30_vbo.c
index 67ab8295218..d4e384b21d2 100644
--- a/src/gallium/drivers/nouveau/nv30/nv30_vbo.c
+++ b/src/gallium/drivers/nouveau/nv30/nv30_vbo.c
@@ -564,7 +564,7 @@ nv30_draw_vbo(struct pipe_context *pipe, const struct pipe_draw_info *info)
    if (nv30->vbo_user && !(nv30->dirty & (NV30_NEW_VERTEX | NV30_NEW_ARRAYS)))
       nv30_update_user_vbufs(nv30);
 
-   nv30_state_validate(nv30, TRUE);
+   nv30_state_validate(nv30, ~0, TRUE);
    if (nv30->draw_flags) {
       nv30_render_vbo(pipe, info);
       return;