drm/ast: Remove unused mclk field

The memory clock is not necessary for the driver. In default for
AST2600 is event incorrect; should be 800 MHz. Remove it.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Jocelyn Falempe <jfalempe@redhat.com>
Link: https://lore.kernel.org/r/20250826065032.344412-4-tzimmermann@suse.de

diff --git a/drivers/gpu/drm/ast/ast_drv.h b/drivers/gpu/drm/ast/ast_drv.h
index 403b86f00a542feb34665db433cf2fc3a1eec178..c9c933b5a70d7c14d4a94956b4e69877507ecd8f 100644 (file)
--- a/drivers/gpu/drm/ast/ast_drv.h
+++ b/drivers/gpu/drm/ast/ast_drv.h
@@ -173,7 +173,6 @@ struct ast_device {
        enum ast_chip chip;
 
        uint32_t dram_type;
-       uint32_t mclk;
 
        void __iomem    *vram;
        unsigned long   vram_base;

diff --git a/drivers/gpu/drm/ast/ast_main.c b/drivers/gpu/drm/ast/ast_main.c
index 0b3fb6856db749bf442c29930659b707b8967c76..492cc8461eb0edee952e855ce7acfb3fb9ecf157 100644 (file)
--- a/drivers/gpu/drm/ast/ast_main.c
+++ b/drivers/gpu/drm/ast/ast_main.c
@@ -215,7 +215,6 @@ static int ast_get_dram_info(struct ast_device *ast)
        struct drm_device *dev = &ast->base;
        struct device_node *np = dev->dev->of_node;
        uint32_t mcr_cfg, mcr_scu_mpll, mcr_scu_strap;
-       uint32_t denum, num, div, ref_pll, dsel;
 
        switch (ast->config_mode) {
        case ast_use_dt:
@@ -243,10 +242,6 @@ static int ast_get_dram_info(struct ast_device *ast)
        case ast_use_defaults:
        default:
                ast->dram_type = AST_DRAM_1Gx16;
-               if (IS_AST_GEN6(ast))
-                       ast->mclk = 800;
-               else
-                       ast->mclk = 396;
                return 0;
        }
 
@@ -300,27 +295,6 @@ static int ast_get_dram_info(struct ast_device *ast)
                }
        }
 
-       if (mcr_scu_strap & 0x2000)
-               ref_pll = 14318;
-       else
-               ref_pll = 12000;
-
-       denum = mcr_scu_mpll & 0x1f;
-       num = (mcr_scu_mpll & 0x3fe0) >> 5;
-       dsel = (mcr_scu_mpll & 0xc000) >> 14;
-       switch (dsel) {
-       case 3:
-               div = 0x4;
-               break;
-       case 2:
-       case 1:
-               div = 0x2;
-               break;
-       default:
-               div = 0x1;
-               break;
-       }
-       ast->mclk = ref_pll * (num + 2) / ((denum + 2) * (div * 1000));
        return 0;
 }