egl,dri: Propagate context priority hint to driver->CreateContext

Jump through the layers of abstraction between egl and dri in order to
feed the context priority attribute through to the backend. This
requires us to read the value from the base _egl_context, convert it to
a DRI attribute, parse it again in the generic context creator before
passing it to the driver as a function parameter.

In order to not require us to pass back the actual value of the context
priority after creation, we impose that drivers should report the
available set of priorities during screen setup (and then they may chose
to fail if given an invalid value as that should have been checked at
the user boundary.)

Signed-off-by: Chris Wilson <[email protected]>
Acked-by: Ben Widawsky <[email protected]> # i915/i965
Reviewed-by: Emil Velikov <[email protected]>
Reviewed-by: Eric Engestrom <[email protected]>
Reviewed-by: Kenneth Graunke <[email protected]>

2 files changed, 13 insertions, 11 deletions

diff --git a/src/mesa/drivers/dri/i965/brw_context.c b/src/mesa/drivers/dri/i965/brw_context.c
index 609d8150641..a86367cc46b 100644
--- a/src/mesa/drivers/dri/i965/brw_context.c
+++ b/src/mesa/drivers/dri/i965/brw_context.c
@@ -820,14 +820,15 @@ brw_process_driconf_options(struct brw_context *brw)
 
 GLboolean
 brwCreateContext(gl_api api,
-	         const struct gl_config *mesaVis,
-		 __DRIcontext *driContextPriv,
+                 const struct gl_config *mesaVis,
+                 __DRIcontext *driContextPriv,
                  unsigned major_version,
                  unsigned minor_version,
                  uint32_t flags,
                  bool notify_reset,
+                 unsigned priority,
                  unsigned *dri_ctx_error,
-	         void *sharedContextPrivate)
+                 void *sharedContextPrivate)
 {
    struct gl_context *shareCtx = (struct gl_context *) sharedContextPrivate;
    struct intel_screen *screen = driContextPriv->driScreenPriv->driverPrivate;
diff --git a/src/mesa/drivers/dri/i965/brw_context.h b/src/mesa/drivers/dri/i965/brw_context.h
index 679b848c505..26e71e62b54 100644
--- a/src/mesa/drivers/dri/i965/brw_context.h
+++ b/src/mesa/drivers/dri/i965/brw_context.h
@@ -1240,14 +1240,15 @@ void intel_resolve_for_dri2_flush(struct brw_context *brw,
                                   __DRIdrawable *drawable);
 
 GLboolean brwCreateContext(gl_api api,
-		      const struct gl_config *mesaVis,
-		      __DRIcontext *driContextPriv,
-                      unsigned major_version,
-                      unsigned minor_version,
-                      uint32_t flags,
-                      bool notify_reset,
-                      unsigned *error,
-		      void *sharedContextPrivate);
+                           const struct gl_config *mesaVis,
+                           __DRIcontext *driContextPriv,
+                           unsigned major_version,
+                           unsigned minor_version,
+                           uint32_t flags,
+                           bool notify_reset,
+                           unsigned priority,
+                           unsigned *error,
+                           void *sharedContextPrivate);
 
 /*======================================================================
  * brw_misc_state.c