drm/i915: transform INTEL_OUTPUT_* into an enum

Because I got annoyed that I had to document what values "int
ddi_personality" is supposed to hold.

A good side-effect of this change is that now the compilers can do
some additional checks on our code, which may prevent some bugs in the
future. A bad side-effect of this change is that now the compilers do
some additional checks on our code and complain when a switch
statement doesn't check for all possible values, so we need to add
"default" cases to all those switches. Hopefully, this may help
preventing confusions against DRM_MODE_CONNECTOR_* and
DRM_MODE_ENCODER_*.

I guess that just by looking at the patch, some people will think this
change is not worth its benefits. In this case, I don't really mind
dropping the patch.

Also, there's probably still a few more places where we can
s/int/enum intel_output_type/, but we can change that later, when we
spot the places.

Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
[danvet: Resolve conflict due to reordered patches.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index 61ea8da..a79f83c 100644 (file)
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -2971,6 +2971,8 @@ static int i9xx_pipe_crc_auto_source(struct drm_device *dev, enum pipe pipe,
                                break;
                        }
                        break;
+               default:
+                       break;
                }
        }
        drm_modeset_unlock_all(dev);

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index aeda09d..ee982f5 100644 (file)
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -6269,6 +6269,8 @@ static int i9xx_crtc_mode_set(struct intel_crtc *crtc,
                case INTEL_OUTPUT_DSI:
                        is_dsi = true;
                        break;
+               default:
+                       break;
                }
 
                num_connectors++;
@@ -6597,6 +6599,8 @@ static void ironlake_init_pch_refclk(struct drm_device *dev)
                        if (enc_to_dig_port(&encoder->base)->port == PORT_A)
                                has_cpu_edp = true;
                        break;
+               default:
+                       break;
                }
        }
 
@@ -6901,6 +6905,8 @@ static void lpt_init_pch_refclk(struct drm_device *dev)
                case INTEL_OUTPUT_ANALOG:
                        has_vga = true;
                        break;
+               default:
+                       break;
                }
        }
 
@@ -6934,6 +6940,8 @@ static int ironlake_get_refclk(struct drm_crtc *crtc)
                case INTEL_OUTPUT_LVDS:
                        is_lvds = true;
                        break;
+               default:
+                       break;
                }
                num_connectors++;
        }
@@ -7188,6 +7196,8 @@ static uint32_t ironlake_compute_dpll(struct intel_crtc *intel_crtc,
                case INTEL_OUTPUT_HDMI:
                        is_sdvo = true;
                        break;
+               default:
+                       break;
                }
 
                num_connectors++;

diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index bf72a92..1e58e64 100644 (file)
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -94,18 +94,20 @@
 
 /* these are outputs from the chip - integrated only
    external chips are via DVO or SDVO output */
-#define INTEL_OUTPUT_UNUSED 0
-#define INTEL_OUTPUT_ANALOG 1
-#define INTEL_OUTPUT_DVO 2
-#define INTEL_OUTPUT_SDVO 3
-#define INTEL_OUTPUT_LVDS 4
-#define INTEL_OUTPUT_TVOUT 5
-#define INTEL_OUTPUT_HDMI 6
-#define INTEL_OUTPUT_DISPLAYPORT 7
-#define INTEL_OUTPUT_EDP 8
-#define INTEL_OUTPUT_DSI 9
-#define INTEL_OUTPUT_UNKNOWN 10
-#define INTEL_OUTPUT_DP_MST 11
+enum intel_output_type {
+       INTEL_OUTPUT_UNUSED = 0,
+       INTEL_OUTPUT_ANALOG = 1,
+       INTEL_OUTPUT_DVO = 2,
+       INTEL_OUTPUT_SDVO = 3,
+       INTEL_OUTPUT_LVDS = 4,
+       INTEL_OUTPUT_TVOUT = 5,
+       INTEL_OUTPUT_HDMI = 6,
+       INTEL_OUTPUT_DISPLAYPORT = 7,
+       INTEL_OUTPUT_EDP = 8,
+       INTEL_OUTPUT_DSI = 9,
+       INTEL_OUTPUT_UNKNOWN = 10,
+       INTEL_OUTPUT_DP_MST = 11,
+};
 
 #define INTEL_DVO_CHIP_NONE 0
 #define INTEL_DVO_CHIP_LVDS 1
@@ -136,7 +138,7 @@ struct intel_encoder {
         */
        struct intel_crtc *new_crtc;
 
-       int type;
+       enum intel_output_type type;
        unsigned int cloneable;
        bool connectors_active;
        void (*hot_plug)(struct intel_encoder *);