[U-Boot] [PATCH] dm: video: fix abuse of enum

[Lothar Waßmann]

Hi,

On Tue, 20 Jun 2017 12:26:29 -0600 Simon Glass wrote:
> Hi Lothar,
> 
> On 20 June 2017 at 04:25, Lothar Waßmann <LW at karo-electronics.de> wrote:
> > LCD_MAX_WIDTH, LCD_MAX_HEIGHT and LCD_MAX_LSBPP are not alternative
> > values for one specific variable, but unrelated entities with distinct
> > purposes. There is no use defining them as values of an 'enum'.
> 
> Can you explain why #define is better? I prefer enum since they are a
> compiler construct instead of preprocessor (thus no need for brackets,
> no strange conversion things) and the debugger knows about them.
> 
An enum defines alternative values for one specific entity (e.g.
clauses for a switch construct), but not a collection of arbitrary data
items.

> > The 'enum' construct would fail miserably for an LCD controller that
> > has a square max. frame size (e.g. 4096x4096).
> 
> What does this mean? I don't understand sorry.
> 
Try your enum with MAX_LCD_WITDH == MAC_LCD_HEIGHT.


Lothar Waßmann