drm/msm/mdp5: introduce mdp5_cfg module

The hardware configuration modification from a version to another
is quite consequent. Introducing a configuration module
(mdp5_cfg) may make things more clear and easier to access when a
new hardware version comes up.

Signed-off-by: Stephane Viau <sviau@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>

1 files changed, 215 insertions, 0 deletions

diff --git a/drivers/gpu/drm/msm/mdp/mdp5/mdp5_cfg.c b/drivers/gpu/drm/msm/mdp/mdp5/mdp5_cfg.c
new file mode 100644
index 000000000000..62e77d1d3c59
--- /dev/null
+++ b/drivers/gpu/drm/msm/mdp/mdp5/mdp5_cfg.c
@@ -0,0 +1,215 @@
+/*
+ * Copyright (c) 2014 The Linux Foundation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include "mdp5_kms.h"
+#include "mdp5_cfg.h"
+
+struct mdp5_cfg_handler {
+	int revision;
+	struct mdp5_cfg config;
+};
+
+/* mdp5_cfg must be exposed (used in mdp5.xml.h) */
+const struct mdp5_cfg_hw *mdp5_cfg = NULL;
+
+const struct mdp5_cfg_hw msm8x74_config = {
+	.name = "msm8x74",
+	.smp = {
+		.mmb_count = 22,
+		.mmb_size = 4096,
+	},
+	.ctl = {
+		.count = 5,
+		.base = { 0x00600, 0x00700, 0x00800, 0x00900, 0x00a00 },
+	},
+	.pipe_vig = {
+		.count = 3,
+		.base = { 0x01200, 0x01600, 0x01a00 },
+	},
+	.pipe_rgb = {
+		.count = 3,
+		.base = { 0x01e00, 0x02200, 0x02600 },
+	},
+	.pipe_dma = {
+		.count = 2,
+		.base = { 0x02a00, 0x02e00 },
+	},
+	.lm = {
+		.count = 5,
+		.base = { 0x03200, 0x03600, 0x03a00, 0x03e00, 0x04200 },
+		.nb_stages = 5,
+	},
+	.dspp = {
+		.count = 3,
+		.base = { 0x04600, 0x04a00, 0x04e00 },
+	},
+	.ad = {
+		.count = 2,
+		.base = { 0x13100, 0x13300 }, /* NOTE: no ad in v1.0 */
+	},
+	.intf = {
+		.count = 4,
+		.base = { 0x12500, 0x12700, 0x12900, 0x12b00 },
+	},
+	.max_clk = 200000000,
+};
+
+const struct mdp5_cfg_hw apq8084_config = {
+	.name = "apq8084",
+	.smp = {
+		.mmb_count = 44,
+		.mmb_size = 8192,
+		.reserved_state[0] = GENMASK(7, 0),	/* first 8 MMBs */
+		.reserved[CID_RGB0] = 2,
+		.reserved[CID_RGB1] = 2,
+		.reserved[CID_RGB2] = 2,
+		.reserved[CID_RGB3] = 2,
+	},
+	.ctl = {
+		.count = 5,
+		.base = { 0x00600, 0x00700, 0x00800, 0x00900, 0x00a00 },
+	},
+	.pipe_vig = {
+		.count = 4,
+		.base = { 0x01200, 0x01600, 0x01a00, 0x01e00 },
+	},
+	.pipe_rgb = {
+		.count = 4,
+		.base = { 0x02200, 0x02600, 0x02a00, 0x02e00 },
+	},
+	.pipe_dma = {
+		.count = 2,
+		.base = { 0x03200, 0x03600 },
+	},
+	.lm = {
+		.count = 6,
+		.base = { 0x03a00, 0x03e00, 0x04200, 0x04600, 0x04a00, 0x04e00 },
+		.nb_stages = 5,
+	},
+	.dspp = {
+		.count = 4,
+		.base = { 0x05200, 0x05600, 0x05a00, 0x05e00 },
+
+	},
+	.ad = {
+		.count = 3,
+		.base = { 0x13500, 0x13700, 0x13900 },
+	},
+	.intf = {
+		.count = 5,
+		.base = { 0x12500, 0x12700, 0x12900, 0x12b00, 0x12d00 },
+	},
+	.max_clk = 320000000,
+};
+
+static const struct mdp5_cfg_handler cfg_handlers[] = {
+	{ .revision = 0, .config = { .hw = &msm8x74_config } },
+	{ .revision = 2, .config = { .hw = &msm8x74_config } },
+	{ .revision = 3, .config = { .hw = &apq8084_config } },
+};
+
+
+static struct mdp5_cfg_platform *mdp5_get_config(struct platform_device *dev);
+
+const struct mdp5_cfg_hw *mdp5_cfg_get_hw_config(void *cfg_hnd)
+{
+	struct mdp5_cfg_handler *cfg_handler = cfg_hnd;
+
+	return cfg_handler->config.hw;
+}
+
+struct mdp5_cfg *mdp5_cfg_get_config(void *cfg_hnd)
+{
+	struct mdp5_cfg_handler *cfg_handler = cfg_hnd;
+
+	return &cfg_handler->config;
+}
+
+int mdp5_cfg_get_hw_rev(void *cfg_hnd)
+{
+	struct mdp5_cfg_handler *cfg_handler = cfg_hnd;
+
+	return cfg_handler->revision;
+}
+
+void mdp5_cfg_destroy(void *cfg_hnd)
+{
+	struct mdp5_cfg_handler *cfg_handler = cfg_hnd;
+
+	kfree(cfg_handler);
+}
+
+void *mdp5_cfg_init(struct mdp5_kms *mdp5_kms,
+		uint32_t major, uint32_t minor)
+{
+	struct drm_device *dev = mdp5_kms->dev;
+	struct platform_device *pdev = dev->platformdev;
+	struct mdp5_cfg_handler *cfg_handler;
+	struct mdp5_cfg_platform *pconfig;
+	int i, ret = 0;
+
+	cfg_handler = kzalloc(sizeof(*cfg_handler), GFP_KERNEL);
+	if (unlikely(!cfg_handler)) {
+		ret = -ENOMEM;
+		goto fail;
+	}
+
+	if (major != 1) {
+		dev_err(dev->dev, "unexpected MDP major version: v%d.%d\n",
+				major, minor);
+		ret = -ENXIO;
+		goto fail;
+	}
+
+	/* only after mdp5_cfg global pointer's init can we access the hw */
+	for (i = 0; i < ARRAY_SIZE(cfg_handlers); i++) {
+		if (cfg_handlers[i].revision != minor)
+			continue;
+		mdp5_cfg = cfg_handlers[i].config.hw;
+
+		break;
+	}
+	if (unlikely(!mdp5_cfg)) {
+		dev_err(dev->dev, "unexpected MDP minor revision: v%d.%d\n",
+				major, minor);
+		ret = -ENXIO;
+		goto fail;
+	}
+
+	cfg_handler->revision = minor;
+	cfg_handler->config.hw = mdp5_cfg;
+
+	pconfig = mdp5_get_config(pdev);
+	memcpy(&cfg_handler->config.platform, pconfig, sizeof(*pconfig));
+
+	DBG("MDP5: %s hw config selected", mdp5_cfg->name);
+
+	return cfg_handler;
+
+fail:
+	if (cfg_handler)
+		mdp5_cfg_destroy(cfg_handler);
+
+	return NULL;
+}
+
+static struct mdp5_cfg_platform *mdp5_get_config(struct platform_device *dev)
+{
+	static struct mdp5_cfg_platform config = {};
+#ifdef CONFIG_OF
+	/* TODO */
+#endif
+	config.iommu = iommu_domain_alloc(&platform_bus_type);
+
+	return &config;
+}