Mesa (master): intel: Add an env var override to execute for a different GPU revision.

[Eric Anholt]

Module: Mesa
Branch: master
Commit: 4ac2f09e2034d8940a0ce9426a8d5c5d74bc63bd
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=4ac2f09e2034d8940a0ce9426a8d5c5d74bc63bd

Author: Eric Anholt <eric at anholt.net>
Date:   Thu Dec  2 18:25:45 2010 -0800

intel: Add an env var override to execute for a different GPU revision.

Sometimes I'm on the train and want to just read what's generated
under INTEL_DEBUG=vs,wm for some code on another generation.  Or, for
the next gen enablement we'll want to dump aub files before we have
the actual hardware.  This will let us do that.

---

 src/mesa/drivers/dri/intel/intel_batchbuffer.c |    2 +-
 src/mesa/drivers/dri/intel/intel_context.c     |    5 -----
 src/mesa/drivers/dri/intel/intel_context.h     |    1 -
 src/mesa/drivers/dri/intel/intel_screen.c      |   16 ++++++++++++++--
 4 files changed, 15 insertions(+), 9 deletions(-)

diff --git a/src/mesa/drivers/dri/intel/intel_batchbuffer.c b/src/mesa/drivers/dri/intel/intel_batchbuffer.c
index 4b498f8..21fc9ec 100644
--- a/src/mesa/drivers/dri/intel/intel_batchbuffer.c
+++ b/src/mesa/drivers/dri/intel/intel_batchbuffer.c
@@ -92,7 +92,7 @@ do_flush_locked(struct intel_batchbuffer *batch, GLuint used)
 
    batch->ptr = NULL;
 
-   if (!intel->no_hw) {
+   if (!intel->intelScreen->no_hw) {
       drm_intel_bo_exec(batch->buf, used, NULL, 0,
 			(x_off & 0xffff) | (y_off << 16));
    }
diff --git a/src/mesa/drivers/dri/intel/intel_context.c b/src/mesa/drivers/dri/intel/intel_context.c
index 152cdca..2f13eb3 100644
--- a/src/mesa/drivers/dri/intel/intel_context.c
+++ b/src/mesa/drivers/dri/intel/intel_context.c
@@ -838,11 +838,6 @@ intelInitContext(struct intel_context *intel,
       intel->always_flush_cache = 1;
    }
 
-   /* Disable all hardware rendering (skip emitting batches and fences/waits
-    * to the kernel)
-    */
-   intel->no_hw = getenv("INTEL_NO_HW") != NULL;
-
    return GL_TRUE;
 }
 
diff --git a/src/mesa/drivers/dri/intel/intel_context.h b/src/mesa/drivers/dri/intel/intel_context.h
index 9d5139c..3840f1e 100644
--- a/src/mesa/drivers/dri/intel/intel_context.h
+++ b/src/mesa/drivers/dri/intel/intel_context.h
@@ -207,7 +207,6 @@ struct intel_context
    GLboolean hw_stipple;
    GLboolean depth_buffer_is_float;
    GLboolean no_rast;
-   GLboolean no_hw;
    GLboolean always_flush_batch;
    GLboolean always_flush_cache;
 
diff --git a/src/mesa/drivers/dri/intel/intel_screen.c b/src/mesa/drivers/dri/intel/intel_screen.c
index 061f0d2..3f13589 100644
--- a/src/mesa/drivers/dri/intel/intel_screen.c
+++ b/src/mesa/drivers/dri/intel/intel_screen.c
@@ -452,7 +452,7 @@ intelCreateContext(gl_api api,
       return brwCreateContext(api, mesaVis,
 			      driContextPriv, sharedContextPrivate);
 #endif
-   fprintf(stderr, "Unrecognized deviceID %x\n", intelScreen->deviceID);
+   fprintf(stderr, "Unrecognized deviceID 0x%x\n", intelScreen->deviceID);
    return GL_FALSE;
 }
 
@@ -462,7 +462,8 @@ intel_init_bufmgr(struct intel_screen *intelScreen)
    __DRIscreen *spriv = intelScreen->driScrnPriv;
    int num_fences = 0;
 
-   intelScreen->no_hw = getenv("INTEL_NO_HW") != NULL;
+   intelScreen->no_hw = (getenv("INTEL_NO_HW") != NULL ||
+			 getenv("INTEL_DEVID_OVERRIDE") != NULL);
 
    intelScreen->bufmgr = intel_bufmgr_gem_init(spriv->fd, BATCH_SZ);
    if (intelScreen->bufmgr == NULL) {
@@ -497,6 +498,7 @@ __DRIconfig **intelInitScreen2(__DRIscreen *psp)
    GLenum fb_format[3];
    GLenum fb_type[3];
    unsigned int api_mask;
+   char *devid_override;
 
    static const GLenum back_buffer_modes[] = {
        GLX_NONE, GLX_SWAP_UNDEFINED_OML, GLX_SWAP_COPY_OML
@@ -523,6 +525,16 @@ __DRIconfig **intelInitScreen2(__DRIscreen *psp)
 			&intelScreen->deviceID))
       return GL_FALSE;
 
+   /* Allow an override of the device ID for the purpose of making the
+    * driver produce dumps for debugging of new chipset enablement.
+    * This implies INTEL_NO_HW, to avoid programming your actual GPU
+    * incorrectly.
+    */
+   devid_override = getenv("INTEL_DEVID_OVERRIDE");
+   if (devid_override) {
+      intelScreen->deviceID = strtod(devid_override, NULL);
+   }
+
    api_mask = (1 << __DRI_API_OPENGL);
 #if FEATURE_ES1
    api_mask |= (1 << __DRI_API_GLES);