drm: Add SMI drm graphic driver

[teddywlq]

Add SM750/SM768/SM770 DRM driver for SiliconMotopm graphic chips.

[deepin-ci-robot]

Hi @teddywlq. Thanks for your PR. 😃

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[Copilot]

Pull Request Overview

This PR adds a comprehensive DRM driver for SiliconMotion graphics chips (SM750/SM768/SM770) including display controller functions, 2D acceleration, and hardware management.

• Implements DDK768 hardware abstraction layer with display control, power management, 2D graphics engine support
• Provides cursor control, clock configuration, and chip initialization functionality
• Includes VDIF timing structures for display mode support

Reviewed Changes

Copilot reviewed 52 out of 190 changed files in this pull request and generated 13 comments.

Show a summary per file

File	Description
drivers/gpu/drm/smidrm/ddk768/ddk768_display.c	Core display control functions for DDK768 including DPMS, timing, and panel control
drivers/gpu/drm/smidrm/ddk768/ddk768_cursor.*	Hardware cursor management implementation
drivers/gpu/drm/smidrm/ddk768/ddk768_clock.*	PLL clock calculation and programming functions
drivers/gpu/drm/smidrm/ddk768/ddk768_chip.*	Chip detection, initialization, and memory configuration
drivers/gpu/drm/smidrm/ddk768/ddk768_2d.*	2D graphics acceleration engine implementation
drivers/gpu/drm/smidrm/ddk768/ddk768.h	Main header file consolidating DDK768 modules
drivers/gpu/drm/smidrm/ddk750/vdif.h	Video display timing format definitions

Comments suppressed due to low confidence (2)

drivers/gpu/drm/smidrm/ddk768/ddk768_display.c:16

• Function 'ddk768_calcPLL' was made static in ddk768_clock.c but it's being used as a global function. This appears to be an inconsistency between .c and .c.bak files

/*

drivers/gpu/drm/smidrm/ddk768/ddk768_cursor.h:43

• Header guard mismatch: the comment says 'CURSOR_H' but the actual guard is 'DDK768_CURSOR_H'

#endif /* _CURSOR_H_ */

[Copilot]

Function 'ddk768_deGetTransparency' was made static but it's used throughout the file. This indicates it should either be exposed as a public API or remain static as helper function

Suggested change

	static unsigned long ddk768_deGetTransparency(void)
	unsigned long ddk768_deGetTransparency(void)

[Copilot]

Function 'ddk768_deSetPixelFormat' was made static but used multiple times throughout the file. Consider if this should be part of the public API

Suggested change

	static void ddk768_deSetPixelFormat(
	void ddk768_deSetPixelFormat(