From mboxrd@z Thu Jan 1 00:00:00 1970 From: Anatolij Gustschin Date: Wed, 27 Mar 2013 17:27:15 +0100 Subject: [U-Boot] Displaying characters on the display in u-boot In-Reply-To: <9827C66E1D129C4183B8AD771A4A57709A02936176@EXGMBX01.sasken.com> References: <9827C66E1D129C4183B8AD771A4A57709A02936170@EXGMBX01.sasken.com> <20130327123925.7ba110c6@crub> <9827C66E1D129C4183B8AD771A4A57709A02936174@EXGMBX01.sasken.com> <20130327160054.6f97a717@crub> <9827C66E1D129C4183B8AD771A4A57709A02936176@EXGMBX01.sasken.com> Message-ID: <20130327172715.24dda4b4@crub> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: u-boot@lists.denx.de Hi, On Wed, 27 Mar 2013 21:05:55 +0530 Bhargav A K wrote: ... > > What U-Boot version do you use? > > U-Boot 1.1.4-geb3fa991 (Feb 21 2013 - 10:11:04) > (output of version command) Very old, ;-). > > This video_set_lut() function is only needed if you use 8 bits per > > pixel frame buffer. > > So can I comment it out, (or) just make a dummy call and dummy return from it. > It wont affect my character(text) rendering on the display, correct ? yes, just provide a dummy video_set_lut(). If you do not use the GDF__8BIT_INDEX framebuffer format, the rendering will work. > My last question, the board_video_init() function just initializes the board > in display/video mode. For example if I have a GPIO to switch b/w command and > video modes and a GPIO to switch on the LCD, etc., I'll have to do all such > functions in it. > > But if all of those are already done, I can just return a dummy from the > function ? Yes. If board specific video initialisation is done elsewhere the board_video_init() can be a dummy function. Some video drivers expect board_video_init() to return frame buffer base address but i.e. in omap3 driver it returns 0 for successful video init or an error code in case the board specific video init fails, thus preventing further initialisation in the cfb_console driver. Thanks, Anatolij