drm: EDID endianness fixes.

Mostly replacing bitfields with explicit masks and shifts.

Signed-off-by: Dave Airlie <airlied@redhat.com>

3 files changed, 96 insertions, 98 deletions

diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
index 801a0d0e0810..7d0835226f6e 100644
--- a/drivers/gpu/drm/drm_edid.c
+++ b/drivers/gpu/drm/drm_edid.c
@@ -252,16 +252,18 @@ struct drm_display_mode *drm_mode_std(struct drm_device *dev,
 {
 	struct drm_display_mode *mode;
 	int hsize = t->hsize * 8 + 248, vsize;
+	unsigned aspect_ratio = (t->vfreq_aspect & EDID_TIMING_ASPECT_MASK)
+		>> EDID_TIMING_ASPECT_SHIFT;
 
 	mode = drm_mode_create(dev);
 	if (!mode)
 		return NULL;
 
-	if (t->aspect_ratio == 0)
+	if (aspect_ratio == 0)
 		vsize = (hsize * 10) / 16;
-	else if (t->aspect_ratio == 1)
+	else if (aspect_ratio == 1)
 		vsize = (hsize * 3) / 4;
-	else if (t->aspect_ratio == 2)
+	else if (aspect_ratio == 2)
 		vsize = (hsize * 4) / 5;
 	else
 		vsize = (hsize * 9) / 16;
@@ -288,17 +290,24 @@ static struct drm_display_mode *drm_mode_detailed(struct drm_device *dev,
 {
 	struct drm_display_mode *mode;
 	struct detailed_pixel_timing *pt = &timing->data.pixel_data;
+	unsigned hactive = (pt->hactive_hblank_hi & 0xf0) << 4 | pt->hactive_lo;
+	unsigned vactive = (pt->vactive_vblank_hi & 0xf0) << 4 | pt->vactive_lo;
+	unsigned hblank = (pt->hactive_hblank_hi & 0xf) << 8 | pt->hblank_lo;
+	unsigned vblank = (pt->vactive_vblank_hi & 0xf) << 8 | pt->vblank_lo;
+	unsigned hsync_offset = (pt->hsync_vsync_offset_pulse_width_hi & 0x3) << 8 | pt->hsync_offset_lo;
+	unsigned hsync_pulse_width = (pt->hsync_vsync_offset_pulse_width_hi & 0xc) << 6 | pt->hsync_pulse_width_lo;
+	unsigned vsync_offset = (pt->hsync_vsync_offset_pulse_width_hi & 0x30) | (pt->vsync_offset_pulse_width_lo & 0xf);
+	unsigned vsync_pulse_width = (pt->hsync_vsync_offset_pulse_width_hi & 0xc0) >> 2 | pt->vsync_offset_pulse_width_lo >> 4;
 
 	/* ignore tiny modes */
-	if (((pt->hactive_hi << 8) | pt->hactive_lo) < 64 ||
-	    ((pt->vactive_hi << 8) | pt->hactive_lo) < 64)
+	if (hactive < 64 || vactive < 64)
 		return NULL;
 
-	if (pt->stereo) {
+	if (pt->misc & DRM_EDID_PT_STEREO) {
 		printk(KERN_WARNING "stereo mode not supported\n");
 		return NULL;
 	}
-	if (!pt->separate_sync) {
+	if (!(pt->misc & DRM_EDID_PT_SEPARATE_SYNC)) {
 		printk(KERN_WARNING "integrated sync not supported\n");
 		return NULL;
 	}
@@ -310,41 +319,36 @@ static struct drm_display_mode *drm_mode_detailed(struct drm_device *dev,
 	mode->type = DRM_MODE_TYPE_DRIVER;
 
 	if (quirks & EDID_QUIRK_135_CLOCK_TOO_HIGH)
-		timing->pixel_clock = 1088;
-
-	mode->clock = timing->pixel_clock * 10;
-
-	mode->hdisplay = (pt->hactive_hi << 8) | pt->hactive_lo;
-	mode->hsync_start = mode->hdisplay + ((pt->hsync_offset_hi << 8) |
-					      pt->hsync_offset_lo);
-	mode->hsync_end = mode->hsync_start +
-		((pt->hsync_pulse_width_hi << 8) |
-		 pt->hsync_pulse_width_lo);
-	mode->htotal = mode->hdisplay + ((pt->hblank_hi << 8) | pt->hblank_lo);
-
-	mode->vdisplay = (pt->vactive_hi << 8) | pt->vactive_lo;
-	mode->vsync_start = mode->vdisplay + ((pt->vsync_offset_hi << 4) |
-					      pt->vsync_offset_lo);
-	mode->vsync_end = mode->vsync_start +
-		((pt->vsync_pulse_width_hi << 4) |
-		 pt->vsync_pulse_width_lo);
-	mode->vtotal = mode->vdisplay + ((pt->vblank_hi << 8) | pt->vblank_lo);
+		timing->pixel_clock = cpu_to_le16(1088);
+
+	mode->clock = le16_to_cpu(timing->pixel_clock) * 10;
+
+	mode->hdisplay = hactive;
+	mode->hsync_start = mode->hdisplay + hsync_offset;
+	mode->hsync_end = mode->hsync_start + hsync_pulse_width;
+	mode->htotal = mode->hdisplay + hblank;
+
+	mode->vdisplay = vactive;
+	mode->vsync_start = mode->vdisplay + vsync_offset;
+	mode->vsync_end = mode->vsync_start + vsync_pulse_width;
+	mode->vtotal = mode->vdisplay + vblank;
 
 	drm_mode_set_name(mode);
 
-	if (pt->interlaced)
+	if (pt->misc & DRM_EDID_PT_INTERLACED)
 		mode->flags |= DRM_MODE_FLAG_INTERLACE;
 
 	if (quirks & EDID_QUIRK_DETAILED_SYNC_PP) {
-		pt->hsync_positive = 1;
-		pt->vsync_positive = 1;
+		pt->misc |= DRM_EDID_PT_HSYNC_POSITIVE | DRM_EDID_PT_VSYNC_POSITIVE;
 	}
 
-	mode->flags |= pt->hsync_positive ? DRM_MODE_FLAG_PHSYNC : DRM_MODE_FLAG_NHSYNC;
-	mode->flags |= pt->vsync_positive ? DRM_MODE_FLAG_PVSYNC : DRM_MODE_FLAG_NVSYNC;
+	mode->flags |= (pt->misc & DRM_EDID_PT_HSYNC_POSITIVE) ?
+		DRM_MODE_FLAG_PHSYNC : DRM_MODE_FLAG_NHSYNC;
+	mode->flags |= (pt->misc & DRM_EDID_PT_VSYNC_POSITIVE) ?
+		DRM_MODE_FLAG_PVSYNC : DRM_MODE_FLAG_NVSYNC;
 
-	mode->width_mm = pt->width_mm_lo | (pt->width_mm_hi << 8);
-	mode->height_mm = pt->height_mm_lo | (pt->height_mm_hi << 8);
+	mode->width_mm = pt->width_mm_lo | (pt->width_height_mm_hi & 0xf) << 8;
+	mode->height_mm = pt->height_mm_lo | (pt->width_height_mm_hi & 0xf0) << 4;
 
 	if (quirks & EDID_QUIRK_DETAILED_IN_CM) {
 		mode->width_mm *= 10;
@@ -465,7 +469,7 @@ static int add_standard_modes(struct drm_connector *connector, struct edid *edid
 		struct drm_display_mode *newmode;
 
 		/* If std timings bytes are 1, 1 it's empty */
-		if (t->hsize == 1 && (t->aspect_ratio | t->vfreq) == 1)
+		if (t->hsize == 1 && t->vfreq_aspect == 1)
 			continue;
 
 		newmode = drm_mode_std(dev, &edid->standard_timings[i]);
@@ -509,7 +513,7 @@ static int add_detailed_info(struct drm_connector *connector,
 				continue;
 
 			/* First detailed mode is preferred */
-			if (i == 0 && edid->preferred_timing)
+			if (i == 0 && (edid->features & DRM_EDID_FEATURE_PREFERRED_TIMING))
 				newmode->type |= DRM_MODE_TYPE_PREFERRED;
 			drm_mode_probed_add(connector, newmode);
 
@@ -767,22 +771,22 @@ int drm_add_edid_modes(struct drm_connector *connector, struct edid *edid)
 	if (quirks & (EDID_QUIRK_PREFER_LARGE_60 | EDID_QUIRK_PREFER_LARGE_75))
 		edid_fixup_preferred(connector, quirks);
 
-	connector->display_info.serration_vsync = edid->serration_vsync;
-	connector->display_info.sync_on_green = edid->sync_on_green;
-	connector->display_info.composite_sync = edid->composite_sync;
-	connector->display_info.separate_syncs = edid->separate_syncs;
-	connector->display_info.blank_to_black = edid->blank_to_black;
-	connector->display_info.video_level = edid->video_level;
-	connector->display_info.digital = edid->digital;
+	connector->display_info.serration_vsync = (edid->input & DRM_EDID_INPUT_SERRATION_VSYNC) ? 1 : 0;
+	connector->display_info.sync_on_green = (edid->input & DRM_EDID_INPUT_SYNC_ON_GREEN) ? 1 : 0;
+	connector->display_info.composite_sync = (edid->input & DRM_EDID_INPUT_COMPOSITE_SYNC) ? 1 : 0;
+	connector->display_info.separate_syncs = (edid->input & DRM_EDID_INPUT_SEPARATE_SYNCS) ? 1 : 0;
+	connector->display_info.blank_to_black = (edid->input & DRM_EDID_INPUT_BLANK_TO_BLACK) ? 1 : 0;
+	connector->display_info.video_level = (edid->input & DRM_EDID_INPUT_VIDEO_LEVEL) >> 5;
+	connector->display_info.digital = (edid->input & DRM_EDID_INPUT_DIGITAL) ? 1 : 0;
 	connector->display_info.width_mm = edid->width_cm * 10;
 	connector->display_info.height_mm = edid->height_cm * 10;
 	connector->display_info.gamma = edid->gamma;
-	connector->display_info.gtf_supported = edid->default_gtf;
-	connector->display_info.standard_color = edid->standard_color;
-	connector->display_info.display_type = edid->display_type;
-	connector->display_info.active_off_supported = edid->pm_active_off;
-	connector->display_info.suspend_supported = edid->pm_suspend;
-	connector->display_info.standby_supported = edid->pm_standby;
+	connector->display_info.gtf_supported = (edid->features & DRM_EDID_FEATURE_DEFAULT_GTF) ? 1 : 0;
+	connector->display_info.standard_color = (edid->features & DRM_EDID_FEATURE_STANDARD_COLOR) ? 1 : 0;
+	connector->display_info.display_type = (edid->features & DRM_EDID_FEATURE_DISPLAY_TYPE) >> 3;
+	connector->display_info.active_off_supported = (edid->features & DRM_EDID_FEATURE_PM_ACTIVE_OFF) ? 1 : 0;
+	connector->display_info.suspend_supported = (edid->features & DRM_EDID_FEATURE_PM_SUSPEND) ? 1 : 0;
+	connector->display_info.standby_supported = (edid->features & DRM_EDID_FEATURE_PM_STANDBY) ? 1 : 0;
 	connector->display_info.gamma = edid->gamma;
 
 	return num_modes;
diff --git a/drivers/gpu/drm/radeon/radeon_display.c b/drivers/gpu/drm/radeon/radeon_display.c
index 5452bb9d925e..3efcf1a526be 100644
--- a/drivers/gpu/drm/radeon/radeon_display.c
+++ b/drivers/gpu/drm/radeon/radeon_display.c
@@ -351,7 +351,7 @@ int radeon_ddc_get_modes(struct radeon_connector *radeon_connector)
 	radeon_i2c_do_lock(radeon_connector, 0);
 	if (edid) {
 		/* update digital bits here */
-		if (edid->digital)
+		if (edid->input & DRM_EDID_INPUT_DIGITAL)
 			radeon_connector->use_digital = 1;
 		else
 			radeon_connector->use_digital = 0;
diff --git a/include/drm/drm_edid.h b/include/drm/drm_edid.h
index a11cc9d32591..c263e4d71754 100644
--- a/include/drm/drm_edid.h
+++ b/include/drm/drm_edid.h
@@ -28,53 +28,49 @@
 #define EDID_LENGTH 128
 #define DDC_ADDR 0x50
 
-#ifdef BIG_ENDIAN
-#error "EDID structure is little endian, need big endian versions"
-#else
-
 struct est_timings {
 	u8 t1;
 	u8 t2;
 	u8 mfg_rsvd;
 } __attribute__((packed));
 
+/* 00=16:10, 01=4:3, 10=5:4, 11=16:9 */
+#define EDID_TIMING_ASPECT_SHIFT 0
+#define EDID_TIMING_ASPECT_MASK  (0x3 << EDID_TIMING_ASPECT_SHIFT)
+
+/* need to add 60 */
+#define EDID_TIMING_VFREQ_SHIFT  2
+#define EDID_TIMING_VFREQ_MASK   (0x3f << EDID_TIMING_VFREQ_SHIFT)
+
 struct std_timing {
 	u8 hsize; /* need to multiply by 8 then add 248 */
-	u8 vfreq:6; /* need to add 60 */
-	u8 aspect_ratio:2; /* 00=16:10, 01=4:3, 10=5:4, 11=16:9 */
+	u8 vfreq_aspect;
 } __attribute__((packed));
 
+#define DRM_EDID_PT_HSYNC_POSITIVE (1 << 6)
+#define DRM_EDID_PT_VSYNC_POSITIVE (1 << 5)
+#define DRM_EDID_PT_SEPARATE_SYNC  (3 << 3)
+#define DRM_EDID_PT_STEREO         (1 << 2)
+#define DRM_EDID_PT_INTERLACED     (1 << 1)
+
 /* If detailed data is pixel timing */
 struct detailed_pixel_timing {
 	u8 hactive_lo;
 	u8 hblank_lo;
-	u8 hblank_hi:4;
-	u8 hactive_hi:4;
+	u8 hactive_hblank_hi;
 	u8 vactive_lo;
 	u8 vblank_lo;
-	u8 vblank_hi:4;
-	u8 vactive_hi:4;
+	u8 vactive_vblank_hi;
 	u8 hsync_offset_lo;
 	u8 hsync_pulse_width_lo;
-	u8 vsync_pulse_width_lo:4;
-	u8 vsync_offset_lo:4;
-	u8 vsync_pulse_width_hi:2;
-	u8 vsync_offset_hi:2;
-	u8 hsync_pulse_width_hi:2;
-	u8 hsync_offset_hi:2;
+	u8 vsync_offset_pulse_width_lo;
+	u8 hsync_vsync_offset_pulse_width_hi;
 	u8 width_mm_lo;
 	u8 height_mm_lo;
-	u8 height_mm_hi:4;
-	u8 width_mm_hi:4;
+	u8 width_height_mm_hi;
 	u8 hborder;
 	u8 vborder;
-	u8 unknown0:1;
-	u8 hsync_positive:1;
-	u8 vsync_positive:1;
-	u8 separate_sync:2;
-	u8 stereo:1;
-	u8 unknown6:1;
-	u8 interlaced:1;
+	u8 misc;
 } __attribute__((packed));
 
 /* If it's not pixel timing, it'll be one of the below */
@@ -88,18 +84,16 @@ struct detailed_data_monitor_range {
 	u8 min_hfreq_khz;
 	u8 max_hfreq_khz;
 	u8 pixel_clock_mhz; /* need to multiply by 10 */
-	u16 sec_gtf_toggle; /* A000=use above, 20=use below */ /* FIXME: byte order */
+	__le16 sec_gtf_toggle; /* A000=use above, 20=use below */
 	u8 hfreq_start_khz; /* need to multiply by 2 */
 	u8 c; /* need to divide by 2 */
-	u16 m; /* FIXME: byte order */
+	__le16 m;
 	u8 k;
 	u8 j; /* need to divide by 2 */
 } __attribute__((packed));
 
 struct detailed_data_wpindex {
-	u8 white_y_lo:2;
-	u8 white_x_lo:2;
-	u8 pad:4;
+	u8 white_xy_lo; /* Upper 2 bits each */
 	u8 white_x_hi;
 	u8 white_y_hi;
 	u8 gamma; /* need to divide by 100 then add 1 */
@@ -134,13 +128,29 @@ struct detailed_non_pixel {
 #define EDID_DETAIL_MONITOR_SERIAL 0xff
 
 struct detailed_timing {
-	u16 pixel_clock; /* need to multiply by 10 KHz */ /* FIXME: byte order */
+	__le16 pixel_clock; /* need to multiply by 10 KHz */
 	union {
 		struct detailed_pixel_timing pixel_data;
 		struct detailed_non_pixel other_data;
 	} data;
 } __attribute__((packed));
 
+#define DRM_EDID_INPUT_SERRATION_VSYNC (1 << 7)
+#define DRM_EDID_INPUT_SYNC_ON_GREEN   (1 << 5)
+#define DRM_EDID_INPUT_COMPOSITE_SYNC  (1 << 4)
+#define DRM_EDID_INPUT_SEPARATE_SYNCS  (1 << 3)
+#define DRM_EDID_INPUT_BLANK_TO_BLACK  (1 << 2)
+#define DRM_EDID_INPUT_VIDEO_LEVEL     (3 << 1)
+#define DRM_EDID_INPUT_DIGITAL         (1 << 0) /* bits above must be zero if set */
+
+#define DRM_EDID_FEATURE_DEFAULT_GTF      (1 << 7)
+#define DRM_EDID_FEATURE_PREFERRED_TIMING (1 << 6)
+#define DRM_EDID_FEATURE_STANDARD_COLOR   (1 << 5)
+#define DRM_EDID_FEATURE_DISPLAY_TYPE     (3 << 3) /* 00=mono, 01=rgb, 10=non-rgb, 11=unknown */
+#define DRM_EDID_FEATURE_PM_ACTIVE_OFF    (1 << 2)
+#define DRM_EDID_FEATURE_PM_SUSPEND       (1 << 1)
+#define DRM_EDID_FEATURE_PM_STANDBY       (1 << 0)
+
 struct edid {
 	u8 header[8];
 	/* Vendor & product info */
@@ -153,25 +163,11 @@ struct edid {
 	u8 version;
 	u8 revision;
 	/* Display info: */
-	/*   input definition */
-	u8 serration_vsync:1;
-	u8 sync_on_green:1;
-	u8 composite_sync:1;
-	u8 separate_syncs:1;
-	u8 blank_to_black:1;
-	u8 video_level:2;
-	u8 digital:1; /* bits below must be zero if set */
+	u8 input;
 	u8 width_cm;
 	u8 height_cm;
 	u8 gamma;
-	/*   feature support */
-	u8 default_gtf:1;
-	u8 preferred_timing:1;
-	u8 standard_color:1;
-	u8 display_type:2; /* 00=mono, 01=rgb, 10=non-rgb, 11=unknown */
-	u8 pm_active_off:1;
-	u8 pm_suspend:1;
-	u8 pm_standby:1;
+	u8 features;
 	/* Color characteristics */
 	u8 red_green_lo;
 	u8 black_white_lo;
@@ -195,8 +191,6 @@ struct edid {
 	u8 checksum;
 } __attribute__((packed));
 
-#endif /* little endian structs */
-
 #define EDID_PRODUCT_ID(e) ((e)->prod_code[0] | ((e)->prod_code[1] << 8))
 
 #endif /* __DRM_EDID_H__ */