drm/amd/display: Move PME to function pointer call semantics

[why]
Legacy IRI style is not linux friendly.

[how]
New function pointer call
semantics will be used for all future PPLIB/DAL interfaces, and also
some existing will be refactored.  This change defines how the
new function pointer structures will look, as well as implements

Signed-off-by: Jun Lei <Jun.Lei@amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
Acked-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_pp_smu.c

@@ -478,7 +478,7 @@ bool dm_pp_get_static_clocks(
 void pp_rv_set_display_requirement(struct pp_smu *pp,
 		struct pp_smu_display_requirement_rv *req)
 {
-	struct dc_context *ctx = pp->ctx;
+	const struct dc_context *ctx = pp->dm;
 	struct amdgpu_device *adev = ctx->driver_context;
 	void *pp_handle = adev->powerplay.pp_handle;
 	const struct amd_pm_funcs *pp_funcs = adev->powerplay.pp_funcs;
@@ -499,7 +499,7 @@ void pp_rv_set_display_requirement(struct pp_smu *pp,
 void pp_rv_set_wm_ranges(struct pp_smu *pp,
 		struct pp_smu_wm_range_sets *ranges)
 {
-	struct dc_context *ctx = pp->ctx;
+	const struct dc_context *ctx = pp->dm;
 	struct amdgpu_device *adev = ctx->driver_context;
 	void *pp_handle = adev->powerplay.pp_handle;
 	const struct amd_pm_funcs *pp_funcs = adev->powerplay.pp_funcs;
@@ -548,7 +548,7 @@ void pp_rv_set_wm_ranges(struct pp_smu *pp,
 
 void pp_rv_set_pme_wa_enable(struct pp_smu *pp)
 {
-	struct dc_context *ctx = pp->ctx;
+	const struct dc_context *ctx = pp->dm;
 	struct amdgpu_device *adev = ctx->driver_context;
 	void *pp_handle = adev->powerplay.pp_handle;
 	const struct amd_pm_funcs *pp_funcs = adev->powerplay.pp_funcs;
@@ -563,7 +563,7 @@ void dm_pp_get_funcs_rv(
 		struct dc_context *ctx,
 		struct pp_smu_funcs_rv *funcs)
 {
-	funcs->pp_smu.ctx = ctx;
+	funcs->pp_smu.dm = ctx;
 	funcs->set_display_requirement = pp_rv_set_display_requirement;
 	funcs->set_wm_ranges = pp_rv_set_wm_ranges;
 	funcs->set_pme_wa_enable = pp_rv_set_pme_wa_enable;

drivers/gpu/drm/amd/display/dc/calcs/dcn_calcs.c

@@ -37,6 +37,13 @@
 
 #define DC_LOGGER \
 	dc->ctx->logger
+
+#define WM_SET_COUNT 4
+#define WM_A 0
+#define WM_B 1
+#define WM_C 2
+#define WM_D 3
+
 /*
  * NOTE:
  *   This file is gcc-parseable HW gospel, coming straight from HW engineers.

drivers/gpu/drm/amd/display/dc/dm_pp_smu.h

@@ -30,33 +30,45 @@
  * interface to PPLIB/SMU to setup clocks and pstate requirements on SoC
  */
 
+enum pp_smu_ver {
+	/*
+	 * PP_SMU_INTERFACE_X should be interpreted as the interface defined
+	 * starting from X, where X is some family of ASICs.  This is as
+	 * opposed to interfaces used only for X.  There will be some degree
+	 * of interface sharing between families of ASIcs.
+	 */
+	PP_SMU_UNSUPPORTED,
+	PP_SMU_VER_RV
+};
 
 struct pp_smu {
-	struct dc_context *ctx;
-};
+	enum pp_smu_ver ver;
+	const void *pp;
 
-enum wm_set_id {
-	WM_A,
-	WM_B,
-	WM_C,
-	WM_D,
-	WM_SET_COUNT,
+	/*
+	 * interim extra handle for backwards compatibility
+	 * as some existing functionality not yet implemented
+	 * by ppsmu
+	 */
+	const void *dm;
 };
 
 struct pp_smu_wm_set_range {
-	enum wm_set_id wm_inst;
+	unsigned int wm_inst;
 	uint32_t min_fill_clk_khz;
 	uint32_t max_fill_clk_khz;
 	uint32_t min_drain_clk_khz;
 	uint32_t max_drain_clk_khz;
 };
 
+#define MAX_WATERMARK_SETS 4
+
 struct pp_smu_wm_range_sets {
-	uint32_t num_reader_wm_sets;
-	struct pp_smu_wm_set_range reader_wm_sets[WM_SET_COUNT];
+	unsigned int num_reader_wm_sets;
+	struct pp_smu_wm_set_range reader_wm_sets[MAX_WATERMARK_SETS];
 
-	uint32_t num_writer_wm_sets;
-	struct pp_smu_wm_set_range writer_wm_sets[WM_SET_COUNT];
+	unsigned int num_writer_wm_sets;
+	struct pp_smu_wm_set_range writer_wm_sets[MAX_WATERMARK_SETS];
 };
 
 struct pp_smu_display_requirement_rv {
@@ -85,48 +97,52 @@ struct pp_smu_display_requirement_rv {
 struct pp_smu_funcs_rv {
 	struct pp_smu pp_smu;
 
-	void (*set_display_requirement)(struct pp_smu *pp,
-			struct pp_smu_display_requirement_rv *req);
+	/* PPSMC_MSG_SetDisplayCount
+	 * 0 triggers S0i2 optimization
+	 */
+	void (*set_display_count)(struct pp_smu *pp, int count);
 
 	/* which SMU message?  are reader and writer WM separate SMU msg? */
 	void (*set_wm_ranges)(struct pp_smu *pp,
 			struct pp_smu_wm_range_sets *ranges);
-	/* PME w/a */
-	void (*set_pme_wa_enable)(struct pp_smu *pp);
-};
 
-#if 0
-struct pp_smu_funcs_rv {
+	/* PPSMC_MSG_SetHardMinDcfclkByFreq
+	 * fixed clock at requested freq, either from FCH bypass or DFS
+	 */
+	void (*set_hard_min_dcfclk_by_freq)(struct pp_smu *pp, int khz);
 
-	/* PPSMC_MSG_SetDisplayCount
-	 *  0 triggers S0i2 optimization
+	/* PPSMC_MSG_SetMinDeepSleepDcfclk
+	 * when DF is in cstate, dcf clock is further divided down
+	 * to just above given frequency
 	 */
-	void (*set_display_count)(struct pp_smu *pp, int count);
+	void (*set_min_deep_sleep_dcfclk)(struct pp_smu *pp, int mhz);
 
 	/* PPSMC_MSG_SetHardMinFclkByFreq
-	 *  FCLK will vary with DPM, but never below requested hard min
+	 * FCLK will vary with DPM, but never below requested hard min
 	 */
 	void (*set_hard_min_fclk_by_freq)(struct pp_smu *pp, int khz);
 
-	/* PPSMC_MSG_SetHardMinDcefclkByFreq
-	 *  fixed clock at requested freq, either from FCH bypass or DFS
+	/* PPSMC_MSG_SetHardMinSocclkByFreq
+	 * Needed for DWB support
 	 */
-	void (*set_hard_min_dcefclk_by_freq)(struct pp_smu *pp, int khz);
+	void (*set_hard_min_socclk_by_freq)(struct pp_smu *pp, int khz);
 
-	/* PPSMC_MSG_SetMinDeepSleepDcefclk
-	 *  when DF is in cstate, dcf clock is further divided down
-	 *  to just above given frequency
-	 */
-	void (*set_min_deep_sleep_dcefclk)(struct pp_smu *pp, int mhz);
+	/* PME w/a */
+	void (*set_pme_wa_enable)(struct pp_smu *pp);
 
-	/* todo: aesthetic
-	 * watermark range table
+	/*
+	 * Legacy functions.  Used for backwards comp. with existing
+	 * PPlib code.
 	 */
+	void (*set_display_requirement)(struct pp_smu *pp,
+			struct pp_smu_display_requirement_rv *req);
+};
 
-	/* todo: functional/feature
-	 * PPSMC_MSG_SetHardMinSocclkByFreq: required to support DWB
-	 */
+struct pp_smu_funcs {
+	struct pp_smu ctx;
+	union {
+		struct pp_smu_funcs_rv rv_funcs;
+	};
 };
-#endif
 
 #endif /* DM_PP_SMU_IF__H */