Re: [PATCH 1/1] drm/mgag200: Added resolution and bandwidth limits for various G200e products.

On 13-06-17 09:19 AM, Julia Lemire wrote:

+static uint32_t mga_vga_calculate_mode_bandwidth(struct drm_display_mode * mode,

•                                                   int bits_per_pixel)
  

+{

•   uint64_t active_area, total_area, pixels_per_second;
  

•   uint64_t bytes_per_pixel = (bits_per_pixel + 7) / 8;
  

•   if(!mode->htotal || !mode->vtotal || !mode->clock)
  

•           return 0;
  

•   active_area = mode->hdisplay * mode->vdisplay;
  

•   total_area = mode->htotal * mode->vtotal;
  

•   pixels_per_second = active_area * mode->clock * 1000 / total_area;
  

•   return (uint32_t)(pixels_per_second * bytes_per_pixel * 100 / (1024));
  

+}

I found a bug while testing this on a 32-bit machine linked to the 64-bit division. Sorry.