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drm/ast: Reorganize widescreen test around hardware Gens

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Testing for support of widescreen modes mixes up various hardware
Gens. First branch by hardware Gen, then do specific tests for each
Gen. By default, widesscreen support is disabled.

Later patches will add more specific tests for each Gen.

v2:
- move shared detection code into helper (Jocelyn)

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Jocelyn Falempe <jfalempe@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250131092257.115596-5-tzimmermann@suse.de
This commit is contained in:
Thomas Zimmermann 2025-01-31 10:21:04 +01:00
parent 219c6a4a6f
commit 1bb3f70c41
1 changed files with 32 additions and 22 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

54
drivers/gpu/drm/ast/ast_main.c
View file

@ -36,33 +36,43 @@
#include "ast_drv.h"
/* Try to detect WSXGA+ on Gen2+ */
static bool __ast_2100_detect_wsxga_p(struct ast_device *ast)
{
u8 vgacrd0 = ast_get_index_reg(ast, AST_IO_VGACRI, 0xd0);
if (!(vgacrd0 & AST_IO_VGACRD0_VRAM_INIT_BY_BMC))
return true;
if (vgacrd0 & AST_IO_VGACRD0_IKVM_WIDESCREEN)
return true;
return false;
}
static void ast_detect_widescreen(struct ast_device *ast)
{
u8 vgacrd0;
ast->support_wsxga_p = false;
/* Check if we support wide screen */
switch (AST_GEN(ast)) {
case 1:
ast->support_wsxga_p = false;
break;
default:
vgacrd0 = ast_get_index_reg(ast, AST_IO_VGACRI, 0xd0);
if (!(vgacrd0 & AST_IO_VGACRD0_VRAM_INIT_BY_BMC))
if (AST_GEN(ast) >= 7) {
ast->support_wsxga_p = true;
} else if (AST_GEN(ast) >= 6) {
if (__ast_2100_detect_wsxga_p(ast))
ast->support_wsxga_p = true;
else if (vgacrd0 & AST_IO_VGACRD0_IKVM_WIDESCREEN)
else if (ast->chip == AST2510)
ast->support_wsxga_p = true;
} else if (AST_GEN(ast) >= 5) {
if (__ast_2100_detect_wsxga_p(ast))
ast->support_wsxga_p = true;
else if (ast->chip == AST1400)
ast->support_wsxga_p = true;
} else if (AST_GEN(ast) >= 4) {
if (__ast_2100_detect_wsxga_p(ast))
ast->support_wsxga_p = true;
else if (ast->chip == AST1300)
ast->support_wsxga_p = true;
} else if (AST_GEN(ast) >= 2) {
if (__ast_2100_detect_wsxga_p(ast))
ast->support_wsxga_p = true;
else {
ast->support_wsxga_p = false;
if (ast->chip == AST1300)
ast->support_wsxga_p = true;
if (ast->chip == AST1400)
ast->support_wsxga_p = true;
if (ast->chip == AST2510)
ast->support_wsxga_p = true;
if (IS_AST_GEN7(ast))
ast->support_wsxga_p = true;
}
break;
}
}