i.MX ProcessorsのトピックMX233 LCD flicker https://community.nxp.com/t5/i-MX-Processors/MX233-LCD-flicker/m-p/179988#M7466 <HTML><HEAD></HEAD><BODY><P>I have attached a 240x320 RGB LCD to MX233. LCDIF is configured to DOTCLK mode, pixel clock is 10Mhz and vsync is 60Hz.</P><P>The framebuffer driver is using double frame buffer. It is OK to display a still picture. As a test, the two buffers are initialized in different color. Then, I run a test app which calls ioctl FBIOPAN_DISPLAY to switch between the two buffers and flicker happens.</P><P>I have traced the driver, ioctl FBIOPEN_DISAPLY simply updates the register HW_LCDIF_NEXT_BUF. I am not sure if the flicker caused by updating HW_LCDIF_NEXT_BUF or some other reasons.</P></BODY></HTML> Thu, 27 Oct 2011 04:57:17 GMT yfwong1z 2011-10-27T04:57:17Z MX233 LCD flicker https://community.nxp.com/t5/i-MX-Processors/MX233-LCD-flicker/m-p/179988#M7466 <HTML><HEAD></HEAD><BODY><P>I have attached a 240x320 RGB LCD to MX233. LCDIF is configured to DOTCLK mode, pixel clock is 10Mhz and vsync is 60Hz.</P><P>The framebuffer driver is using double frame buffer. It is OK to display a still picture. As a test, the two buffers are initialized in different color. Then, I run a test app which calls ioctl FBIOPAN_DISPLAY to switch between the two buffers and flicker happens.</P><P>I have traced the driver, ioctl FBIOPEN_DISAPLY simply updates the register HW_LCDIF_NEXT_BUF. I am not sure if the flicker caused by updating HW_LCDIF_NEXT_BUF or some other reasons.</P></BODY></HTML> Thu, 27 Oct 2011 04:57:17 GMT https://community.nxp.com/t5/i-MX-Processors/MX233-LCD-flicker/m-p/179988#M7466 yfwong1z 2011-10-27T04:57:17Z