drm/msm/a6xx: Enable IFPC on Adreno X1-85

Add the IFPC restore register list and enable IFPC support on Adreno
X1-85 gpu.

Signed-off-by: Akhil P Oommen <akhilpo@oss.qualcomm.com>
Patchwork: https://patchwork.freedesktop.org/patch/673384/
Signed-off-by: Rob Clark <robin.clark@oss.qualcomm.com>

Author: akhilpo-qcom

drivers/gpu/drm/msm/adreno/a6xx_catalog.c

@@ -1353,6 +1353,69 @@ static const uint32_t a7xx_pwrup_reglist_regs[] = {
 
 DECLARE_ADRENO_REGLIST_LIST(a7xx_pwrup_reglist);
 
+/* Applicable for X185, A750 */
+static const u32 a750_ifpc_reglist_regs[] = {
+	REG_A6XX_TPL1_BICUBIC_WEIGHTS_TABLE_0,
+	REG_A6XX_TPL1_BICUBIC_WEIGHTS_TABLE_1,
+	REG_A6XX_TPL1_BICUBIC_WEIGHTS_TABLE_2,
+	REG_A6XX_TPL1_BICUBIC_WEIGHTS_TABLE_3,
+	REG_A6XX_TPL1_BICUBIC_WEIGHTS_TABLE_4,
+	REG_A6XX_TPL1_NC_MODE_CNTL,
+	REG_A6XX_SP_NC_MODE_CNTL,
+	REG_A6XX_CP_DBG_ECO_CNTL,
+	REG_A6XX_CP_PROTECT_CNTL,
+	REG_A6XX_CP_PROTECT(0),
+	REG_A6XX_CP_PROTECT(1),
+	REG_A6XX_CP_PROTECT(2),
+	REG_A6XX_CP_PROTECT(3),
+	REG_A6XX_CP_PROTECT(4),
+	REG_A6XX_CP_PROTECT(5),
+	REG_A6XX_CP_PROTECT(6),
+	REG_A6XX_CP_PROTECT(7),
+	REG_A6XX_CP_PROTECT(8),
+	REG_A6XX_CP_PROTECT(9),
+	REG_A6XX_CP_PROTECT(10),
+	REG_A6XX_CP_PROTECT(11),
+	REG_A6XX_CP_PROTECT(12),
+	REG_A6XX_CP_PROTECT(13),
+	REG_A6XX_CP_PROTECT(14),
+	REG_A6XX_CP_PROTECT(15),
+	REG_A6XX_CP_PROTECT(16),
+	REG_A6XX_CP_PROTECT(17),
+	REG_A6XX_CP_PROTECT(18),
+	REG_A6XX_CP_PROTECT(19),
+	REG_A6XX_CP_PROTECT(20),
+	REG_A6XX_CP_PROTECT(21),
+	REG_A6XX_CP_PROTECT(22),
+	REG_A6XX_CP_PROTECT(23),
+	REG_A6XX_CP_PROTECT(24),
+	REG_A6XX_CP_PROTECT(25),
+	REG_A6XX_CP_PROTECT(26),
+	REG_A6XX_CP_PROTECT(27),
+	REG_A6XX_CP_PROTECT(28),
+	REG_A6XX_CP_PROTECT(29),
+	REG_A6XX_CP_PROTECT(30),
+	REG_A6XX_CP_PROTECT(31),
+	REG_A6XX_CP_PROTECT(32),
+	REG_A6XX_CP_PROTECT(33),
+	REG_A6XX_CP_PROTECT(34),
+	REG_A6XX_CP_PROTECT(35),
+	REG_A6XX_CP_PROTECT(36),
+	REG_A6XX_CP_PROTECT(37),
+	REG_A6XX_CP_PROTECT(38),
+	REG_A6XX_CP_PROTECT(39),
+	REG_A6XX_CP_PROTECT(40),
+	REG_A6XX_CP_PROTECT(41),
+	REG_A6XX_CP_PROTECT(42),
+	REG_A6XX_CP_PROTECT(43),
+	REG_A6XX_CP_PROTECT(44),
+	REG_A6XX_CP_PROTECT(45),
+	REG_A6XX_CP_PROTECT(46),
+	REG_A6XX_CP_PROTECT(47),
+};
+
+DECLARE_ADRENO_REGLIST_LIST(a750_ifpc_reglist);
+
 static const struct adreno_info a7xx_gpus[] = {
 	{
 		.chip_ids = ADRENO_CHIP_IDS(0x07000200),
@@ -1442,12 +1505,14 @@ static const struct adreno_info a7xx_gpus[] = {
 		.inactive_period = DRM_MSM_INACTIVE_PERIOD,
 		.quirks = ADRENO_QUIRK_HAS_CACHED_COHERENT |
 			  ADRENO_QUIRK_HAS_HW_APRIV |
-			  ADRENO_QUIRK_PREEMPTION,
+			  ADRENO_QUIRK_PREEMPTION |
+			  ADRENO_QUIRK_IFPC,
 		.init = a6xx_gpu_init,
 		.a6xx = &(const struct a6xx_info) {
 			.hwcg = a740_hwcg,
 			.protect = &a730_protect,
 			.pwrup_reglist = &a7xx_pwrup_reglist,
+			.ifpc_reglist = &a750_ifpc_reglist,
 			.gmu_chipid = 0x7050001,
 			.gmu_cgc_mode = 0x00020202,
 			.bcms = (const struct a6xx_bcm[]) {
@@ -1487,6 +1552,7 @@ static const struct adreno_info a7xx_gpus[] = {
 		.a6xx = &(const struct a6xx_info) {
 			.protect = &a730_protect,
 			.pwrup_reglist = &a7xx_pwrup_reglist,
+			.ifpc_reglist = &a750_ifpc_reglist,
 			.gmu_chipid = 0x7090100,
 			.gmu_cgc_mode = 0x00020202,
 			.bcms = (const struct a6xx_bcm[]) {

drivers/gpu/drm/msm/adreno/a6xx_gpu.c

@@ -828,11 +828,10 @@ static void a7xx_patch_pwrup_reglist(struct msm_gpu *gpu)
 	u32 *dest = (u32 *)&lock->regs[0];
 	int i;
 
-	reglist = adreno_gpu->info->a6xx->pwrup_reglist;
-
 	lock->gpu_req = lock->cpu_req = lock->turn = 0;
-	lock->ifpc_list_len = 0;
-	lock->preemption_list_len = reglist->count;
+
+	reglist = adreno_gpu->info->a6xx->ifpc_reglist;
+	lock->ifpc_list_len = reglist->count;
 
 	/*
 	 * For each entry in each of the lists, write the offset and the current
@@ -843,6 +842,14 @@ static void a7xx_patch_pwrup_reglist(struct msm_gpu *gpu)
 		*dest++ = gpu_read(gpu, reglist->regs[i]);
 	}
 
+	reglist = adreno_gpu->info->a6xx->pwrup_reglist;
+	lock->preemption_list_len = reglist->count;
+
+	for (i = 0; i < reglist->count; i++) {
+		*dest++ = reglist->regs[i];
+		*dest++ = gpu_read(gpu, reglist->regs[i]);
+	}
+
 	/*
 	 * The overall register list is composed of
 	 * 1. Static IFPC-only registers

drivers/gpu/drm/msm/adreno/a6xx_gpu.h

@@ -45,6 +45,7 @@ struct a6xx_info {
 	const struct adreno_reglist *hwcg;
 	const struct adreno_protect *protect;
 	const struct adreno_reglist_list *pwrup_reglist;
+	const struct adreno_reglist_list *ifpc_reglist;
 	u32 gmu_chipid;
 	u32 gmu_cgc_mode;
 	u32 prim_fifo_threshold;