[Mesa-stable] [PATCH v3] egl: add HAVE_LIBDRM define, fix EGL X11 platform

[Tapani Pälli]

On 12/02/2013 11:06 PM, Chad Versace wrote:
> On 12/01/2013 01:53 AM, Tapani Pälli wrote:
>> Commit a594cec broke EGL X11 backend by adding dependency between
>> X11 and DRM backends requiring HAVE_EGL_PLATFORM_DRM defined for X11.
>>
>> This patch fixes the issue by adding additional define for libdrm
>> detection independent of which backend is being compiled. Tested by
>> compiling Mesa with '--with-egl-platforms=x11' and running es2gears_x11
>> + glbenchmark2.7 successfully.
>>
>> v2: return true for dri2_auth if running without libdrm (Samuel)
>> v3: check libdrm when building EGL drm platform + AM_CFLAGS fix (Emil)
>>
>> Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=72062
>> Signed-off-by: Tapani Pälli <tapani.palli at intel.com>
>> Reviewed-by: Emil Velikov <emil.l.velikov at gmail.com>
>> Cc: Samuel Thibault <samuel.thibault at ens-lyon.org>
>> Cc: mesa-stable at lists.freedesktop.org
>
>
> I tested this patch with --with-egl-platforms=x11, and it works
> for me.
>
> But, why return true from dri2_authenticate() when building
> without libdrm? I expected dri2_authenticate() to return false
> in that case, because the function never authenticates with the
> Xserver without drmGetMagic().
>

I hope Samuel is able to answer this. I'm not sure which platform/driver 
uses this configuration, I was trying to ask for it also in the bug to 
be able to test this. I can also leave that change out for now and 
return FALSE by default if no conclusion to this. I'd really like a 
working EGL ...

>
>
>
>> ---
>>   configure.ac                        | 5 +++++
>>   src/egl/drivers/dri2/platform_x11.c | 9 +++------
>>   2 files changed, 8 insertions(+), 6 deletions(-)
>>
>> diff --git a/configure.ac b/configure.ac
>> index 8c52535..91a5817 100644
>> --- a/configure.ac
>> +++ b/configure.ac
>> @@ -761,6 +761,9 @@ AC_SUBST([MESA_LLVM])
>>   # Check for libdrm
>>   PKG_CHECK_MODULES([LIBDRM], [libdrm >= $LIBDRM_REQUIRED],
>>                     [have_libdrm=yes], [have_libdrm=no])
>> +if test "x$have_libdrm" = xyes; then
>> +    DEFINES="$DEFINES -DHAVE_LIBDRM"
>> +fi
>>
>>   PKG_CHECK_MODULES([LIBUDEV], [libudev >= $LIBUDEV_REQUIRED],
>>                     have_libudev=yes, have_libudev=no)
>> @@ -1439,6 +1442,8 @@ for plat in $egl_platforms; do
>>       drm)
>>           test "x$enable_gbm" = "xno" &&
>>               AC_MSG_ERROR([EGL platform drm needs gbm])
>> +        test "x$have_libdrm" != xyes &&
>> +            AC_MSG_ERROR([EGL platform drm requires libdrm >= 
>> $LIBDRM_REQUIRED])
>>           ;;
>>
>>       android|fbdev|gdi|null)
>> diff --git a/src/egl/drivers/dri2/platform_x11.c 
>> b/src/egl/drivers/dri2/platform_x11.c
>> index c56a413..04cb62b 100644
>> --- a/src/egl/drivers/dri2/platform_x11.c
>> +++ b/src/egl/drivers/dri2/platform_x11.c
>> @@ -33,7 +33,7 @@
>>   #include <fcntl.h>
>>   #include <errno.h>
>>   #include <unistd.h>
>> -#ifdef HAVE_DRM_PLATFORM
>> +#ifdef HAVE_LIBDRM
>>   #include <xf86drm.h>
>>   #endif
>>   #include <sys/types.h>
>> @@ -608,7 +608,7 @@ dri2_x11_authenticate(_EGLDisplay *disp, uint32_t 
>> id)
>>   static EGLBoolean
>>   dri2_authenticate(_EGLDisplay *disp)
>>   {
>> -#ifdef HAVE_DRM_PLATFORM
>> +#ifdef HAVE_LIBDRM
>>      struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
>>      drm_magic_t magic;
>>
>> @@ -621,11 +621,8 @@ dri2_authenticate(_EGLDisplay *disp)
>>         _eglLog(_EGL_WARNING, "DRI2: failed to authenticate");
>>         return EGL_FALSE;
>>      }
>> -
>> -   return EGL_TRUE;
>> -#else
>> -   return EGL_FALSE;
>>   #endif
>> +   return EGL_TRUE;
>>   }
>>
>>   static EGLBoolean
>>
>