drm/amd: Mark some tables as const

This patch marks some compile-time constant tables 'const'.
The tables marked in this patch are the low hanging fruit
where little other changes were necesary to avoid casting
away constness etc. Also mark some tables that are private
to a file as static.
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Nils Wallménius <nils.wallmenius@gmail.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/amdgpu.h

@@ -2348,7 +2348,7 @@ static inline void amdgpu_unregister_atpx_handler(void) {}
  * KMS
  */
 extern const struct drm_ioctl_desc amdgpu_ioctls_kms[];
-extern int amdgpu_max_kms_ioctl;
+extern const int amdgpu_max_kms_ioctl;
 
 int amdgpu_driver_load_kms(struct drm_device *dev, unsigned long flags);
 int amdgpu_driver_unload_kms(struct drm_device *dev);

drivers/gpu/drm/amd/amdgpu/amdgpu_display.c

@@ -596,20 +596,20 @@ const struct drm_mode_config_funcs amdgpu_mode_funcs = {
 	.output_poll_changed = amdgpu_output_poll_changed
 };
 
-static struct drm_prop_enum_list amdgpu_underscan_enum_list[] =
+static const struct drm_prop_enum_list amdgpu_underscan_enum_list[] =
 {	{ UNDERSCAN_OFF, "off" },
 	{ UNDERSCAN_ON, "on" },
 	{ UNDERSCAN_AUTO, "auto" },
 };
 
-static struct drm_prop_enum_list amdgpu_audio_enum_list[] =
+static const struct drm_prop_enum_list amdgpu_audio_enum_list[] =
 {	{ AMDGPU_AUDIO_DISABLE, "off" },
 	{ AMDGPU_AUDIO_ENABLE, "on" },
 	{ AMDGPU_AUDIO_AUTO, "auto" },
 };
 
 /* XXX support different dither options? spatial, temporal, both, etc. */
-static struct drm_prop_enum_list amdgpu_dither_enum_list[] =
+static const struct drm_prop_enum_list amdgpu_dither_enum_list[] =
 {	{ AMDGPU_FMT_DITHER_DISABLE, "off" },
 	{ AMDGPU_FMT_DITHER_ENABLE, "on" },
 };

drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c

@@ -166,7 +166,7 @@ module_param_named(pcie_gen_cap, amdgpu_pcie_gen_cap, uint, 0444);
 MODULE_PARM_DESC(pcie_lane_cap, "PCIE Lane Caps (0: autodetect (default))");
 module_param_named(pcie_lane_cap, amdgpu_pcie_lane_cap, uint, 0444);
 
-static struct pci_device_id pciidlist[] = {
+static const struct pci_device_id pciidlist[] = {
 #ifdef CONFIG_DRM_AMDGPU_CIK
 	/* Kaveri */
 	{0x1002, 0x1304, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CHIP_KAVERI|AMD_IS_MOBILITY|AMD_IS_APU},

drivers/gpu/drm/amd/amdgpu/amdgpu_irq.c

@@ -498,7 +498,7 @@ static int amdgpu_irqdomain_map(struct irq_domain *d,
 	return 0;
 }
 
-static struct irq_domain_ops amdgpu_hw_irqdomain_ops = {
+static const struct irq_domain_ops amdgpu_hw_irqdomain_ops = {
 	.map = amdgpu_irqdomain_map,
 };
 

drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c

@@ -755,4 +755,4 @@ const struct drm_ioctl_desc amdgpu_ioctls_kms[] = {
 	DRM_IOCTL_DEF_DRV(AMDGPU_GEM_OP, amdgpu_gem_op_ioctl, DRM_AUTH|DRM_RENDER_ALLOW),
 	DRM_IOCTL_DEF_DRV(AMDGPU_GEM_USERPTR, amdgpu_gem_userptr_ioctl, DRM_AUTH|DRM_RENDER_ALLOW),
 };
-int amdgpu_max_kms_ioctl = ARRAY_SIZE(amdgpu_ioctls_kms);
+const int amdgpu_max_kms_ioctl = ARRAY_SIZE(amdgpu_ioctls_kms);

drivers/gpu/drm/amd/powerplay/hwmgr/fiji_hwmgr.c

@@ -95,23 +95,23 @@ enum DPM_EVENT_SRC {
 /* [2.5%,~2.5%] Clock stretched is multiple of 2.5% vs
  * not and [Fmin, Fmax, LDO_REFSEL, USE_FOR_LOW_FREQ]
  */
-uint16_t fiji_clock_stretcher_lookup_table[2][4] = { {600, 1050, 3, 0},
-                                                {600, 1050, 6, 1} };
+static const uint16_t fiji_clock_stretcher_lookup_table[2][4] =
+{ {600, 1050, 3, 0}, {600, 1050, 6, 1} };
 
 /* [FF, SS] type, [] 4 voltage ranges, and
  * [Floor Freq, Boundary Freq, VID min , VID max]
  */
-uint32_t fiji_clock_stretcher_ddt_table[2][4][4] =
+static const uint32_t fiji_clock_stretcher_ddt_table[2][4][4] =
 { { {265, 529, 120, 128}, {325, 650, 96, 119}, {430, 860, 32, 95}, {0, 0, 0, 31} },
   { {275, 550, 104, 112}, {319, 638, 96, 103}, {360, 720, 64, 95}, {384, 768, 32, 63} } };
 
 /* [Use_For_Low_freq] value, [0%, 5%, 10%, 7.14%, 14.28%, 20%]
  * (coming from PWR_CKS_CNTL.stretch_amount reg spec)
  */
-uint8_t fiji_clock_stretch_amount_conversion[2][6] = { {0, 1, 3, 2, 4, 5},
-                                                  {0, 2, 4, 5, 6, 5} };
+static const uint8_t fiji_clock_stretch_amount_conversion[2][6] =
+{ {0, 1, 3, 2, 4, 5}, {0, 2, 4, 5, 6, 5} };
 
-const unsigned long PhwFiji_Magic = (unsigned long)(PHM_VIslands_Magic);
+static const unsigned long PhwFiji_Magic = (unsigned long)(PHM_VIslands_Magic);
 
 struct fiji_power_state *cast_phw_fiji_power_state(
 				  struct pp_hw_power_state *hw_ps)

drivers/gpu/drm/amd/powerplay/hwmgr/fiji_hwmgr.h

@@ -263,7 +263,7 @@ struct fiji_hwmgr {
 	bool                           enable_tdc_limit_feature;
 	bool                           enable_pkg_pwr_tracking_feature;
 	bool                           disable_uvd_power_tune_feature;
-	struct fiji_pt_defaults       *power_tune_defaults;
+	const struct fiji_pt_defaults  *power_tune_defaults;
 	struct SMU73_Discrete_PmFuses  power_tune_table;
 	uint32_t                       dte_tj_offset;
 	uint32_t                       fast_watermark_threshold;

drivers/gpu/drm/amd/powerplay/hwmgr/fiji_powertune.c

@@ -32,7 +32,7 @@
 #define VOLTAGE_SCALE  4
 #define POWERTUNE_DEFAULT_SET_MAX    1
 
-struct fiji_pt_defaults fiji_power_tune_data_set_array[POWERTUNE_DEFAULT_SET_MAX] = {
+const struct fiji_pt_defaults fiji_power_tune_data_set_array[POWERTUNE_DEFAULT_SET_MAX] = {
 		/*sviLoadLIneEn,  SviLoadLineVddC, TDC_VDDC_ThrottleReleaseLimitPerc */
 		{1,               0xF,             0xFD,
 		/* TDC_MAWt, TdcWaterfallCtl, DTEAmbientTempBase */
@@ -143,7 +143,7 @@ static void get_scl_sda_value(uint8_t line, uint8_t *scl, uint8_t* sda)
 int fiji_populate_bapm_parameters_in_dpm_table(struct pp_hwmgr *hwmgr)
 {
 	struct fiji_hwmgr *data = (struct fiji_hwmgr *)(hwmgr->backend);
-	struct fiji_pt_defaults *defaults = data->power_tune_defaults;
+	const struct fiji_pt_defaults *defaults = data->power_tune_defaults;
 	SMU73_Discrete_DpmTable  *dpm_table = &(data->smc_state_table);
 	struct phm_ppt_v1_information *table_info =
 			(struct phm_ppt_v1_information *)(hwmgr->pptable);
@@ -222,7 +222,7 @@ int fiji_populate_bapm_parameters_in_dpm_table(struct pp_hwmgr *hwmgr)
 static int fiji_populate_svi_load_line(struct pp_hwmgr *hwmgr)
 {
     struct fiji_hwmgr *data = (struct fiji_hwmgr *)(hwmgr->backend);
-    struct fiji_pt_defaults *defaults = data->power_tune_defaults;
+    const struct fiji_pt_defaults *defaults = data->power_tune_defaults;
 
     data->power_tune_table.SviLoadLineEn = defaults->SviLoadLineEn;
     data->power_tune_table.SviLoadLineVddC = defaults->SviLoadLineVddC;
@@ -238,7 +238,7 @@ static int fiji_populate_tdc_limit(struct pp_hwmgr *hwmgr)
 	struct fiji_hwmgr *data = (struct fiji_hwmgr *)(hwmgr->backend);
 	struct phm_ppt_v1_information *table_info =
 			(struct phm_ppt_v1_information *)(hwmgr->pptable);
-	struct  fiji_pt_defaults *defaults = data->power_tune_defaults;
+	const struct fiji_pt_defaults *defaults = data->power_tune_defaults;
 
 	/* TDC number of fraction bits are changed from 8 to 7
 	 * for Fiji as requested by SMC team
@@ -256,7 +256,7 @@ static int fiji_populate_tdc_limit(struct pp_hwmgr *hwmgr)
 static int fiji_populate_dw8(struct pp_hwmgr *hwmgr, uint32_t fuse_table_offset)
 {
 	struct fiji_hwmgr *data = (struct fiji_hwmgr *)(hwmgr->backend);
-	struct  fiji_pt_defaults *defaults = data->power_tune_defaults;
+	const struct fiji_pt_defaults *defaults = data->power_tune_defaults;
 	uint32_t temp;
 
 	if (fiji_read_smc_sram_dword(hwmgr->smumgr,

drivers/gpu/drm/amd/powerplay/hwmgr/tonga_hwmgr.c

@@ -89,17 +89,17 @@
 typedef uint32_t PECI_RegistryValue;
 
 /* [2.5%,~2.5%] Clock stretched is multiple of 2.5% vs not and [Fmin, Fmax, LDO_REFSEL, USE_FOR_LOW_FREQ] */
-uint16_t PP_ClockStretcherLookupTable[2][4] = {
+static const uint16_t PP_ClockStretcherLookupTable[2][4] = {
 	{600, 1050, 3, 0},
 	{600, 1050, 6, 1} };
 
 /* [FF, SS] type, [] 4 voltage ranges, and [Floor Freq, Boundary Freq, VID min , VID max] */
-uint32_t PP_ClockStretcherDDTTable[2][4][4] = {
+static const uint32_t PP_ClockStretcherDDTTable[2][4][4] = {
 	{ {265, 529, 120, 128}, {325, 650, 96, 119}, {430, 860, 32, 95}, {0, 0, 0, 31} },
 	{ {275, 550, 104, 112}, {319, 638, 96, 103}, {360, 720, 64, 95}, {384, 768, 32, 63} } };
 
 /* [Use_For_Low_freq] value, [0%, 5%, 10%, 7.14%, 14.28%, 20%] (coming from PWR_CKS_CNTL.stretch_amount reg spec) */
-uint8_t PP_ClockStretchAmountConversion[2][6] = {
+static const uint8_t PP_ClockStretchAmountConversion[2][6] = {
 	{0, 1, 3, 2, 4, 5},
 	{0, 2, 4, 5, 6, 5} };
 
@@ -113,7 +113,7 @@ enum DPM_EVENT_SRC {
 };
 typedef enum DPM_EVENT_SRC DPM_EVENT_SRC;
 
-const unsigned long PhwTonga_Magic = (unsigned long)(PHM_VIslands_Magic);
+static const unsigned long PhwTonga_Magic = (unsigned long)(PHM_VIslands_Magic);
 
 struct tonga_power_state *cast_phw_tonga_power_state(
 				  struct pp_hw_power_state *hw_ps)

drivers/gpu/drm/amd/powerplay/inc/fiji_pwrvirus.h

@@ -46,7 +46,7 @@ struct PWR_Command_Table
 typedef struct PWR_Command_Table PWR_Command_Table;
 
 #define PWR_VIRUS_TABLE_SIZE  10243
-static PWR_Command_Table PwrVirusTable[PWR_VIRUS_TABLE_SIZE] =
+static const PWR_Command_Table PwrVirusTable[PWR_VIRUS_TABLE_SIZE] =
 {
     { PwrCmdWrite, 0x100100b6, mmPCIE_INDEX                               },
     { PwrCmdWrite, 0x00000000, mmPCIE_DATA                                },

drivers/gpu/drm/amd/powerplay/smumgr/cz_smumgr.c

@@ -39,7 +39,7 @@
 
 #define SIZE_ALIGN_32(x)    (((x) + 31) / 32 * 32)
 
-static enum cz_scratch_entry firmware_list[] = {
+static const enum cz_scratch_entry firmware_list[] = {
 	CZ_SCRATCH_ENTRY_UCODE_ID_SDMA0,
 	CZ_SCRATCH_ENTRY_UCODE_ID_SDMA1,
 	CZ_SCRATCH_ENTRY_UCODE_ID_CP_CE,

drivers/gpu/drm/amd/powerplay/smumgr/fiji_smumgr.c

@@ -44,7 +44,7 @@
 
 #define FIJI_SMC_SIZE 0x20000
 
-struct SMU73_Discrete_GraphicsLevel avfs_graphics_level[8] = {
+static const struct SMU73_Discrete_GraphicsLevel avfs_graphics_level[8] = {
 		/*  Min        Sclk       pcie     DeepSleep Activity  CgSpll      CgSpll    spllSpread  SpllSpread   CcPwr  CcPwr  Sclk   Display     Enabled     Enabled                       Voltage    Power */
 		/* Voltage,  Frequency,  DpmLevel,  DivId,    Level,  FuncCntl3,  FuncCntl4,  Spectrum,   Spectrum2,  DynRm, DynRm1  Did, Watermark, ForActivity, ForThrottle, UpHyst, DownHyst, DownHyst, Throttle */
 		{ 0x3c0fd047, 0x30750000,   0x00,     0x03,   0x1e00, 0x00200410, 0x87020000, 0x21680000, 0x0c000000,   0,      0,   0x16,   0x00,       0x01,        0x01,      0x00,   0x00,      0x00,     0x00 },
@@ -189,7 +189,7 @@ int fiji_copy_bytes_to_smc(struct pp_smumgr *smumgr,
 
 int fiji_program_jump_on_start(struct pp_smumgr *smumgr)
 {
-	static unsigned char data[] = { 0xE0, 0x00, 0x80, 0x40 };
+	static const unsigned char data[] = { 0xE0, 0x00, 0x80, 0x40 };
 
 	fiji_copy_bytes_to_smc(smumgr, 0x0, data, 4, sizeof(data) + 1);
 
@@ -665,7 +665,7 @@ int fiji_setup_pwr_virus(struct pp_smumgr *smumgr)
 {
 	int i, result = -1;
 	uint32_t reg, data;
-	PWR_Command_Table *virus = PwrVirusTable;
+	const PWR_Command_Table *virus = PwrVirusTable;
 	struct fiji_smumgr *priv = (struct fiji_smumgr *)(smumgr->backend);
 
 	priv->avfs.AvfsBtcStatus = AVFS_LOAD_VIRUS;

drivers/gpu/drm/amd/powerplay/smumgr/tonga_smumgr.c

@@ -145,7 +145,7 @@ int tonga_copy_bytes_to_smc(struct pp_smumgr *smumgr,
 
 int tonga_program_jump_on_start(struct pp_smumgr *smumgr)
 {
-	static unsigned char pData[] = { 0xE0, 0x00, 0x80, 0x40 };
+	static const unsigned char pData[] = { 0xE0, 0x00, 0x80, 0x40 };
 
 	tonga_copy_bytes_to_smc(smumgr, 0x0, pData, 4, sizeof(pData)+1);