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drm/ast: Remove unused value dp501_maxclk

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Remove reading the link-rate. The value is maintained by the connector
code but never used.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220207141544.30015-5-tzimmermann@suse.de
This commit is contained in:
Thomas Zimmermann 2022-02-07 15:15:39 +01:00
parent 042ddf6663
commit 84d826c8fb
3 changed files with 3 additions and 63 deletions
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58
drivers/gpu/drm/ast/ast_dp501.c
View File

@ -272,64 +272,6 @@ static bool ast_launch_m68k(struct drm_device *dev)
return true;
}
u8 ast_get_dp501_max_clk(struct drm_device *dev)
{
struct ast_private *ast = to_ast_private(dev);
u32 boot_address, offset, data;
u8 linkcap[4], linkrate, linklanes, maxclk = 0xff;
u32 *plinkcap;
if (ast->config_mode == ast_use_p2a) {
boot_address = get_fw_base(ast);
/* validate FW version */
offset = AST_DP501_GBL_VERSION;
data = ast_mindwm(ast, boot_address + offset);
if ((data & AST_DP501_FW_VERSION_MASK) != AST_DP501_FW_VERSION_1) /* version: 1x */
return maxclk;
/* Read Link Capability */
offset = AST_DP501_LINKRATE;
plinkcap = (u32 *)linkcap;
*plinkcap = ast_mindwm(ast, boot_address + offset);
if (linkcap[2] == 0) {
linkrate = linkcap[0];
linklanes = linkcap[1];
data = (linkrate == 0x0a) ? (90 * linklanes) : (54 * linklanes);
if (data > 0xff)
data = 0xff;
maxclk = (u8)data;
}
} else {
if (!ast->dp501_fw_buf)
return AST_DP501_DEFAULT_DCLK; /* 1024x768 as default */
/* dummy read */
offset = 0x0000;
data = readl(ast->dp501_fw_buf + offset);
/* validate FW version */
offset = AST_DP501_GBL_VERSION;
data = readl(ast->dp501_fw_buf + offset);
if ((data & AST_DP501_FW_VERSION_MASK) != AST_DP501_FW_VERSION_1) /* version: 1x */
return maxclk;
/* Read Link Capability */
offset = AST_DP501_LINKRATE;
plinkcap = (u32 *)linkcap;
*plinkcap = readl(ast->dp501_fw_buf + offset);
if (linkcap[2] == 0) {
linkrate = linkcap[0];
linklanes = linkcap[1];
data = (linkrate == 0x0a) ? (90 * linklanes) : (54 * linklanes);
if (data > 0xff)
data = 0xff;
maxclk = (u8)data;
}
}
return maxclk;
}
bool ast_dp501_read_edid(struct drm_device *dev, u8 *ediddata)
{
struct ast_private *ast = to_ast_private(dev);

1
drivers/gpu/drm/ast/ast_drv.h
View File

@ -171,7 +171,6 @@ struct ast_private {
} config_mode;
enum ast_tx_chip tx_chip_type;
u8 dp501_maxclk;
u8 *dp501_fw_addr;
const struct firmware *dp501_fw; /* dp501 fw */
};

7
drivers/gpu/drm/ast/ast_mode.c
View File

@ -1284,16 +1284,15 @@ static int ast_get_modes(struct drm_connector *connector)
int ret;
if (ast->tx_chip_type == AST_TX_DP501) {
ast->dp501_maxclk = 0xff;
edid = kmalloc(128, GFP_KERNEL);
if (!edid)
return -ENOMEM;
flags = ast_dp501_read_edid(connector->dev, (u8 *)edid);
if (flags)
ast->dp501_maxclk = ast_get_dp501_max_clk(connector->dev);
else
if (!flags) {
kfree(edid);
edid = NULL;
}
}
if (!flags && ast_connector->i2c)
edid = drm_get_edid(connector, &ast_connector->i2c->adapter);