soc/amd/glinda: Use pcie_gpp_dxio_update_clk_req_config

This function turns off gpp_clk for the devices which are disabled, and
adds the code to fix up the clock configuration depending on dxio
descriptors. Also this brings glinda in line with cezanne, mendocino,
phoenix and picasso. This also prepares glinda to use the common
function gpp_clk_setup_common.

Change-Id: Id66d1b7f0d8ec9a7cbd378ad6ad7d68eeab531f0
Signed-off-by: Varshit Pandya <pandyavarshit@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/80415
Reviewed-by: Anand Vaikar <a.vaikar2021@gmail.com>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/soc/amd/glinda/Kconfig

@@ -75,6 +75,7 @@ config SOC_AMD_GLINDA
 	select SOC_AMD_COMMON_BLOCK_UCODE		# TODO: Check if this is still correct
 	select SOC_AMD_COMMON_FSP_CCX_CPPC_HOB		# TODO: Check if this is still correct
 	select SOC_AMD_COMMON_FSP_DMI_TABLES		# TODO: Check if this is still correct
+	select SOC_AMD_COMMON_FSP_PCIE_CLK_REQ
 	select SOC_AMD_COMMON_FSP_PCI			# TODO: Check if this is still correct
 	select SOC_AMD_COMMON_FSP_PRELOAD_FSPS
 	select SOC_AMD_COMMON_ROMSTAGE_LEGACY_DMA_FIXUP

src/soc/amd/glinda/chip.h

@@ -7,6 +7,7 @@
 
 #include <amdblocks/chip.h>
 #include <amdblocks/i2c.h>
+#include <amdblocks/pci_clk_req.h>
 #include <gpio.h>
 #include <soc/i2c.h>
 #include <soc/southbridge.h>
@@ -92,11 +93,7 @@ struct soc_amd_glinda_config {
 
 	/* The array index is the general purpose PCIe clock output number. Values in here
 	   aren't the values written to the register to have the default to be always on. */
-	enum {
-		GPP_CLK_ON,	/* GPP clock always on; default */
-		GPP_CLK_REQ,	/* GPP clock controlled by corresponding #CLK_REQx pin */
-		GPP_CLK_OFF,	/* GPP clk off */
-	} gpp_clk_config[GPP_CLK_OUTPUT_AVAILABLE];
+	enum gpp_clk_req gpp_clk_config[GPP_CLK_OUTPUT_AVAILABLE];
 
 	/* performance policy for the PCIe links: power consumption vs. link speed */
 	enum {

src/soc/amd/glinda/fch.c

@@ -6,6 +6,7 @@
 #include <amdblocks/acpimmio.h>
 #include <amdblocks/amd_pci_util.h>
 #include <amdblocks/gpio.h>
+#include <amdblocks/pci_clk_req.h>
 #include <amdblocks/reset.h>
 #include <amdblocks/smi.h>
 #include <assert.h>
@@ -130,7 +131,7 @@ static void fch_init_acpi_ports(void)
 /* configure the general purpose PCIe clock outputs according to the devicetree settings */
 static void gpp_clk_setup(void)
 {
-	const struct soc_amd_glinda_config *cfg = config_of_soc();
+	struct soc_amd_glinda_config *cfg = config_of_soc();
 
 	/* look-up table to be able to iterate over the PCIe clock output settings */
 	const uint8_t gpp_clk_shift_lut[GPP_CLK_OUTPUT_COUNT] = {
@@ -145,6 +146,8 @@ static void gpp_clk_setup(void)
 
 	uint32_t gpp_clk_ctl = misc_read32(GPP_CLK_CNTRL);
 
+	pcie_gpp_dxio_update_clk_req_config(&cfg->gpp_clk_config[0],
+					    ARRAY_SIZE(cfg->gpp_clk_config));
 	for (int i = 0; i < GPP_CLK_OUTPUT_COUNT; i++) {
 		gpp_clk_ctl &= ~GPP_CLK_REQ_MASK(gpp_clk_shift_lut[i]);
 		/*