diff options
Diffstat (limited to 'drivers/gpu/drm/drm_modes.c')
| -rw-r--r-- | drivers/gpu/drm/drm_modes.c | 105 |
1 files changed, 69 insertions, 36 deletions
diff --git a/drivers/gpu/drm/drm_modes.c b/drivers/gpu/drm/drm_modes.c index 76d63394c776..f1f473ea97d3 100644 --- a/drivers/gpu/drm/drm_modes.c +++ b/drivers/gpu/drm/drm_modes.c @@ -258,8 +258,10 @@ struct drm_display_mode *drm_cvt_mode(struct drm_device *dev, int hdisplay, drm_mode->clock -= drm_mode->clock % CVT_CLOCK_STEP; /* 18/16. Find actual vertical frame frequency */ /* ignore - just set the mode flag for interlaced */ - if (interlaced) + if (interlaced) { drm_mode->vtotal *= 2; + drm_mode->flags |= DRM_MODE_FLAG_INTERLACE; + } /* Fill the mode line name */ drm_mode_set_name(drm_mode); if (reduced) @@ -268,43 +270,35 @@ struct drm_display_mode *drm_cvt_mode(struct drm_device *dev, int hdisplay, else drm_mode->flags |= (DRM_MODE_FLAG_PVSYNC | DRM_MODE_FLAG_NHSYNC); - if (interlaced) - drm_mode->flags |= DRM_MODE_FLAG_INTERLACE; - return drm_mode; + return drm_mode; } EXPORT_SYMBOL(drm_cvt_mode); /** - * drm_gtf_mode - create the modeline based on GTF algorithm + * drm_gtf_mode_complex - create the modeline based on full GTF algorithm * * @dev :drm device * @hdisplay :hdisplay size * @vdisplay :vdisplay size * @vrefresh :vrefresh rate. * @interlaced :whether the interlace is supported - * @margins :whether the margin is supported + * @margins :desired margin size + * @GTF_[MCKJ] :extended GTF formula parameters * * LOCKING. * none. * - * return the modeline based on GTF algorithm - * - * This function is to create the modeline based on the GTF algorithm. - * Generalized Timing Formula is derived from: - * GTF Spreadsheet by Andy Morrish (1/5/97) - * available at http://www.vesa.org + * return the modeline based on full GTF algorithm. * - * And it is copied from the file of xserver/hw/xfree86/modes/xf86gtf.c. - * What I have done is to translate it by using integer calculation. - * I also refer to the function of fb_get_mode in the file of - * drivers/video/fbmon.c + * GTF feature blocks specify C and J in multiples of 0.5, so we pass them + * in here multiplied by two. For a C of 40, pass in 80. */ -struct drm_display_mode *drm_gtf_mode(struct drm_device *dev, int hdisplay, - int vdisplay, int vrefresh, - bool interlaced, int margins) -{ - /* 1) top/bottom margin size (% of height) - default: 1.8, */ +struct drm_display_mode * +drm_gtf_mode_complex(struct drm_device *dev, int hdisplay, int vdisplay, + int vrefresh, bool interlaced, int margins, + int GTF_M, int GTF_2C, int GTF_K, int GTF_2J) +{ /* 1) top/bottom margin size (% of height) - default: 1.8, */ #define GTF_MARGIN_PERCENTAGE 18 /* 2) character cell horizontal granularity (pixels) - default 8 */ #define GTF_CELL_GRAN 8 @@ -316,17 +310,9 @@ struct drm_display_mode *drm_gtf_mode(struct drm_device *dev, int hdisplay, #define H_SYNC_PERCENT 8 /* min time of vsync + back porch (microsec) */ #define MIN_VSYNC_PLUS_BP 550 - /* blanking formula gradient */ -#define GTF_M 600 - /* blanking formula offset */ -#define GTF_C 40 - /* blanking formula scaling factor */ -#define GTF_K 128 - /* blanking formula scaling factor */ -#define GTF_J 20 /* C' and M' are part of the Blanking Duty Cycle computation */ -#define GTF_C_PRIME (((GTF_C - GTF_J) * GTF_K / 256) + GTF_J) -#define GTF_M_PRIME (GTF_K * GTF_M / 256) +#define GTF_C_PRIME ((((GTF_2C - GTF_2J) * GTF_K / 256) + GTF_2J) / 2) +#define GTF_M_PRIME (GTF_K * GTF_M / 256) struct drm_display_mode *drm_mode; unsigned int hdisplay_rnd, vdisplay_rnd, vfieldrate_rqd; int top_margin, bottom_margin; @@ -460,17 +446,61 @@ struct drm_display_mode *drm_gtf_mode(struct drm_device *dev, int hdisplay, drm_mode->clock = pixel_freq; - drm_mode_set_name(drm_mode); - drm_mode->flags = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC; - if (interlaced) { drm_mode->vtotal *= 2; drm_mode->flags |= DRM_MODE_FLAG_INTERLACE; } + drm_mode_set_name(drm_mode); + if (GTF_M == 600 && GTF_2C == 80 && GTF_K == 128 && GTF_2J == 40) + drm_mode->flags = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC; + else + drm_mode->flags = DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_NVSYNC; + return drm_mode; } +EXPORT_SYMBOL(drm_gtf_mode_complex); + +/** + * drm_gtf_mode - create the modeline based on GTF algorithm + * + * @dev :drm device + * @hdisplay :hdisplay size + * @vdisplay :vdisplay size + * @vrefresh :vrefresh rate. + * @interlaced :whether the interlace is supported + * @margins :whether the margin is supported + * + * LOCKING. + * none. + * + * return the modeline based on GTF algorithm + * + * This function is to create the modeline based on the GTF algorithm. + * Generalized Timing Formula is derived from: + * GTF Spreadsheet by Andy Morrish (1/5/97) + * available at http://www.vesa.org + * + * And it is copied from the file of xserver/hw/xfree86/modes/xf86gtf.c. + * What I have done is to translate it by using integer calculation. + * I also refer to the function of fb_get_mode in the file of + * drivers/video/fbmon.c + * + * Standard GTF parameters: + * M = 600 + * C = 40 + * K = 128 + * J = 20 + */ +struct drm_display_mode * +drm_gtf_mode(struct drm_device *dev, int hdisplay, int vdisplay, int vrefresh, + bool lace, int margins) +{ + return drm_gtf_mode_complex(dev, hdisplay, vdisplay, vrefresh, lace, + margins, 600, 40 * 2, 128, 20 * 2); +} EXPORT_SYMBOL(drm_gtf_mode); + /** * drm_mode_set_name - set the name on a mode * @mode: name will be set in this mode @@ -482,8 +512,11 @@ EXPORT_SYMBOL(drm_gtf_mode); */ void drm_mode_set_name(struct drm_display_mode *mode) { - snprintf(mode->name, DRM_DISPLAY_MODE_LEN, "%dx%d", mode->hdisplay, - mode->vdisplay); + bool interlaced = !!(mode->flags & DRM_MODE_FLAG_INTERLACE); + + snprintf(mode->name, DRM_DISPLAY_MODE_LEN, "%dx%d%s", + mode->hdisplay, mode->vdisplay, + interlaced ? "i" : ""); } EXPORT_SYMBOL(drm_mode_set_name); |