eglCreateImageKHR is working only with RGBA8888 format. How to send RGB888 data?

I implemented an opengl-es application running on mali-400 gpu. I grab the 1280x960 RGB buffer from camera and render on GPU , I use zero copy operation using EGL_EXT_image_dma_buf_import extension.

my problem is that the Besler camera gives frames in RGB888 format. but eglCreateImageKHR is working only if I give RGBA8888 format . If I pass RGB888 to eglCreateImageKHR it gives black screen and also egl image returned is 0.

will I have to convert RGB888 to RGBA8888 before passing? what are the other options. below is my code.

EGLint egl_img_attr[] = { EGL_IMAGE_PRESERVED_KHR, EGL_TRUE, EGL_DMA_BUF_PLANE0_FD_EXT, buffer->dbuf_fd, EGL_DMA_BUF_PLANE0_OFFSET_EXT, 0, EGL_DMA_BUF_PLANE0_PITCH_EXT, TEX_WIDTH * 3, EGL_WIDTH, TEX_WIDTH, EGL_HEIGHT, TEX_HEIGHT, EGL_LINUX_DRM_FOURCC_EXT, DRM_FORMAT_RGBA8888 , EGL_NONE, EGL_NONE }; buffer->egl_img = eglCreateImageKHR(egl_dpy, EGL_NO_CONTEXT, EGL_LINUX_DMA_BUF_EXT, (EGLClientBuffer)0, egl_img_attr); 

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