Merge branch 'drm-next' of git://people.freedesktop.org/~airlied/linux

Pull drm updates from Dave Airlie:
 "This is the main git pull for the drm,

  I pretty much froze major pulls at -rc5/6 time, and haven't had much
  fallout, so will probably continue doing that.

  Lots of changes all over, big internal header cleanup to make it clear
  drm features are legacy things and what are things that modern KMS
  drivers should be using.  Also big move to use the new generic fences
  in all the TTM drivers.

  core:
        atomic prep work,
        vblank rework changes, allows immediate vblank disables
        major header reworking and cleanups to better delinate legacy
        interfaces from what KMS drivers should be using.
        cursor planes locking fixes

  ttm:
        move to generic fences (affects all TTM drivers)
        ppc64 caching fixes

  radeon:
        userptr support,
        uvd for old asics,
        reset rework for fence changes
        better buffer placement changes,
        dpm feature enablement
        hdmi audio support fixes

  intel:
        Cherryview work,
        180 degree rotation,
        skylake prep work,
        execlist command submission
        full ppgtt prep work
        cursor improvements
        edid caching,
        vdd handling improvements

  nouveau:
        fence reworking
        kepler memory clock work
        gt21x clock work
        fan control improvements
        hdmi infoframe fixes
        DP audio

  ast:
        ppc64 fixes
        caching fix

  rcar:
        rcar-du DT support

  ipuv3:
        prep work for capture support

  msm:
        LVDS support for mdp4, new panel, gpu refactoring

  exynos:
        exynos3250 SoC support, drop bad mmap interface,
        mipi dsi changes, and component match support"

* 'drm-next' of git://people.freedesktop.org/~airlied/linux: (640 commits)
  drm/mst: rework payload table allocation to conform better.
  drm/ast: Fix HW cursor image
  drm/radeon/kv: add uvd/vce info to dpm debugfs output
  drm/radeon/ci: add uvd/vce info to dpm debugfs output
  drm/radeon: export reservation_object from dmabuf to ttm
  drm/radeon: cope with foreign fences inside the reservation object
  drm/radeon: cope with foreign fences inside display
  drm/core: use helper to check driver features
  drm/radeon/cik: write gfx ucode version to ucode addr reg
  drm/radeon/si: print full CS when we hit a packet 0
  drm/radeon: remove unecessary includes
  drm/radeon/combios: declare legacy_connector_convert as static
  drm/radeon/atombios: declare connector convert tables as static
  drm/radeon: drop btc_get_max_clock_from_voltage_dependency_table
  drm/radeon/dpm: drop clk/voltage dependency filters for BTC
  drm/radeon/dpm: drop clk/voltage dependency filters for CI
  drm/radeon/dpm: drop clk/voltage dependency filters for SI
  drm/radeon/dpm: drop clk/voltage dependency filters for NI
  drm/radeon: disable audio when we disable hdmi (v2)
  drm/radeon: split audio enable between eg and r600 (v2)
  ...

1 files changed, 71 insertions, 8 deletions

diff --git a/drivers/gpu/drm/ast/ast_main.c b/drivers/gpu/drm/ast/ast_main.c
index b792194e0d9c..035dacc93382 100644
--- a/drivers/gpu/drm/ast/ast_main.c
+++ b/drivers/gpu/drm/ast/ast_main.c
@@ -63,7 +63,7 @@ uint8_t ast_get_index_reg_mask(struct ast_private *ast,
 }
 
 
-static int ast_detect_chip(struct drm_device *dev)
+static int ast_detect_chip(struct drm_device *dev, bool *need_post)
 {
         struct ast_private *ast = dev->dev_private;
         uint32_t data, jreg;
@@ -110,6 +110,21 @@ static int ast_detect_chip(struct drm_device *dev)
                 }
         }
 
+        /*
+         * If VGA isn't enabled, we need to enable now or subsequent
+         * access to the scratch registers will fail. We also inform
+         * our caller that it needs to POST the chip
+         * (Assumption: VGA not enabled -> need to POST)
+         */
+        if (!ast_is_vga_enabled(dev)) {
+                ast_enable_vga(dev);
+                ast_enable_mmio(dev);
+                DRM_INFO("VGA not enabled on entry, requesting chip POST\n");
+                *need_post = true;
+        } else
+                *need_post = false;
+
+        /* Check if we support wide screen */
         switch (ast->chip) {
         case AST1180:
                 ast->support_wide_screen = true;
@@ -125,6 +140,7 @@ static int ast_detect_chip(struct drm_device *dev)
                         ast->support_wide_screen = true;
                 else {
                         ast->support_wide_screen = false;
+                        /* Read SCU7c (silicon revision register) */
                         ast_write32(ast, 0xf004, 0x1e6e0000);
                         ast_write32(ast, 0xf000, 0x1);
                         data = ast_read32(ast, 0x1207c);
@@ -137,11 +153,29 @@ static int ast_detect_chip(struct drm_device *dev)
                 break;
         }
 
+        /* Check 3rd Tx option (digital output afaik) */
         ast->tx_chip_type = AST_TX_NONE;
-        jreg = ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xa3, 0xff);
-        if (jreg & 0x80)
-                ast->tx_chip_type = AST_TX_SIL164;
+
+        /*
+         * VGACRA3 Enhanced Color Mode Register, check if DVO is already
+         * enabled, in that case, assume we have a SIL164 TMDS transmitter
+         *
+         * Don't make that assumption if we the chip wasn't enabled and
+         * is at power-on reset, otherwise we'll incorrectly "detect" a
+         * SIL164 when there is none.
+         */
+        if (!*need_post) {
+                jreg = ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xa3, 0xff);
+                if (jreg & 0x80)
+                        ast->tx_chip_type = AST_TX_SIL164;
+        }
+
         if ((ast->chip == AST2300) || (ast->chip == AST2400)) {
+                /*
+                 * On AST2300 and 2400, look the configuration set by the SoC in
+                 * the SOC scratch register #1 bits 11:8 (interestingly marked
+                 * as "reserved" in the spec)
+                 */
                 jreg = ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xd1, 0xff);
                 switch (jreg) {
                 case 0x04:
@@ -162,6 +196,17 @@ static int ast_detect_chip(struct drm_device *dev)
                 }
         }
 
+        /* Print stuff for diagnostic purposes */
+        switch(ast->tx_chip_type) {
+        case AST_TX_SIL164:
+                DRM_INFO("Using Sil164 TMDS transmitter\n");
+                break;
+        case AST_TX_DP501:
+                DRM_INFO("Using DP501 DisplayPort transmitter\n");
+                break;
+        default:
+                DRM_INFO("Analog VGA only\n");
+        }
         return 0;
 }
 
@@ -346,6 +391,7 @@ static u32 ast_get_vram_info(struct drm_device *dev)
 int ast_driver_load(struct drm_device *dev, unsigned long flags)
 {
         struct ast_private *ast;
+        bool need_post;
         int ret = 0;
 
         ast = kzalloc(sizeof(struct ast_private), GFP_KERNEL);
@@ -360,13 +406,27 @@ int ast_driver_load(struct drm_device *dev, unsigned long flags)
                 ret = -EIO;
                 goto out_free;
         }
-        ast->ioregs = pci_iomap(dev->pdev, 2, 0);
+
+        /*
+         * If we don't have IO space at all, use MMIO now and
+         * assume the chip has MMIO enabled by default (rev 0x20
+         * and higher).
+         */
+        if (!(pci_resource_flags(dev->pdev, 2) & IORESOURCE_IO)) {
+                DRM_INFO("platform has no IO space, trying MMIO\n");
+                ast->ioregs = ast->regs + AST_IO_MM_OFFSET;
+        }
+
+        /* "map" IO regs if the above hasn't done so already */
         if (!ast->ioregs) {
-                ret = -EIO;
-                goto out_free;
+                ast->ioregs = pci_iomap(dev->pdev, 2, 0);
+                if (!ast->ioregs) {
+                        ret = -EIO;
+                        goto out_free;
+                }
         }
 
-        ast_detect_chip(dev);
+        ast_detect_chip(dev, &need_post);
 
         if (ast->chip != AST1180) {
                 ast_get_dram_info(dev);
@@ -374,6 +434,9 @@ int ast_driver_load(struct drm_device *dev, unsigned long flags)
                 DRM_INFO("dram %d %d %d %08x\n", ast->mclk, ast->dram_type, ast->dram_bus_width, ast->vram_size);
         }
 
+        if (need_post)
+                ast_post_gpu(dev);
+
         ret = ast_mm_init(ast);
         if (ret)
                 goto out_free;