kernel/linux.git/drivers/gpu/drm/drm_rect.c, branch v6.6.132

gpu/drm: fix repeated words in comments

2022-10-24T07:27:04+00:00

Delete the redundant word 'the'. Signed-off-by: wangjianli Signed-off-by: Maxime Ripard Link: https://patchwork.freedesktop.org/patch/msgid/20221022060701.58280-1-wangjianli@cdjrlc.com

drm/rect: update kerneldoc for drm_rect_clip_scaled()

2019-11-28T12:15:43+00:00

This was forgotten in f96bdf564f3e ("drm/rect: Handle rounding errors in drm_rect_clip_scaled, v3.") Spotted while reviewing patches from Ville touching this area. Reviewed-by: Ville Syrjälä Fixes: f96bdf564f3e ("drm/rect: Handle rounding errors in drm_rect_clip_scaled, v3.") Cc: Maarten Lankhorst Cc: Benjamin Gaignard Cc: Ville Syrjala Signed-off-by: Daniel Vetter Link: https://patchwork.freedesktop.org/patch/msgid/20191126145213.380079-1-daniel.vetter@ffwll.ch

drm/rect: Keep the clipped dst rectangle in place

2019-11-28T11:33:38+00:00

Now that we've constrained the clipped source rectangle such that it can't have negative dimensions doing the same for the dst rectangle seems appropriate. Should at least result in the clipped src and dst rectangles being a bit more consistent with each other. Cc: Benjamin Gaignard Cc: Maarten Lankhorst Cc: Daniel Vetter Signed-off-by: Ville Syrjälä Link: https://patchwork.freedesktop.org/patch/msgid/20191122175623.13565-4-ville.syrjala@linux.intel.com Reviewed-by: Daniel Vetter Reviewed-by: Benjamin Gaignard

drm/rect: Keep the scaled clip bounded

2019-11-28T11:33:33+00:00

Limit the scaled clip to only clip at most dst_w/h pixels. This avoids the problem with clip_scaled() not being able to return negative values. Since new_src_w/h is now properly bounded we can remove the clamp()s. Cc: Benjamin Gaignard Cc: Maarten Lankhorst Cc: Daniel Vetter Testcase: igt/kms_selftest/drm_rect_clip_scaled_signed_vs_unsigned Signed-off-by: Ville Syrjälä Link: https://patchwork.freedesktop.org/patch/msgid/20191122175623.13565-3-ville.syrjala@linux.intel.com Reviewed-by: Daniel Vetter Reviewed-by: Benjamin Gaignard

drm/rect: Avoid division by zero

2019-11-28T11:33:23+00:00

Check for zero width/height destination rectangle in drm_rect_clip_scaled() to avoid a division by zero. Cc: stable@vger.kernel.org Fixes: f96bdf564f3e ("drm/rect: Handle rounding errors in drm_rect_clip_scaled, v3.") Cc: Maarten Lankhorst Cc: Benjamin Gaignard Cc: Daniel Vetter Testcase: igt/kms_selftest/drm_rect_clip_scaled_div_by_zero Signed-off-by: Ville Syrjälä Link: https://patchwork.freedesktop.org/patch/msgid/20191122175623.13565-2-ville.syrjala@linux.intel.com Reviewed-by: Daniel Vetter Reviewed-by: Benjamin Gaignard

drm: drop use of drmP.h in drm/*

2019-05-27T16:07:03+00:00

The use of the drmP.h header file is deprecated. Remove use from all files in drm/* so people do not look there and follow a bad example. Build tested allyesconfig,allmodconfig on x86, arm etc. Including alpha that is as always more challenging than the rest. Signed-off-by: Sam Ravnborg Acked-by: Daniel Vetter Cc: Maarten Lankhorst Cc: Maxime Ripard Cc: Sean Paul Cc: David Airlie Link: https://patchwork.freedesktop.org/patch/msgid/20190526173535.32701-8-sam@ravnborg.org

drm: Nuke drm_calc_{h,v}scale_relaxed()

2019-02-07T11:14:06+00:00

The fuzzy drm_calc_{h,v}scale_relaxed() helpers are no longer used. Throw them in the bin. Signed-off-by: Ville Syrjälä Link: https://patchwork.freedesktop.org/patch/msgid/20190206183204.21127-1-ville.syrjala@linux.intel.com Acked-by: Alex Deucher

drm/rect: Handle rounding errors in drm_rect_clip_scaled, v3.

2018-05-04T09:09:54+00:00

Instead of relying on a scale which may increase rounding errors, clip src by doing: src * (dst - clip) / dst and rounding the result away from 1, so the new coordinates get closer to 1. We won't need to fix up with a magic macro afterwards, because our scaling factor will never go to the other side of 1. Changes since v1: - Adjust dst immediately, else drm_rect_width/height on dst gives bogus results. Change since v2: - Get rid of macros and use 64-bits math. Signed-off-by: Maarten Lankhorst [mlankhorst: Add Villes comment, and rename newsrc to tmp. (Ville)] Reviewed-by: Ville Syrjälä Link: https://patchwork.freedesktop.org/patch/msgid/20180503112217.37292-3-maarten.lankhorst@linux.intel.com

drm/rect: Round above 1 << 16 upwards to correct scale calculation functions.

2018-05-04T08:57:52+00:00

When calculating limits we want to be as pessimistic as possible, so we have to explicitly say whether we want to round up or down to accurately calculate whether we are below min_scale or above max_scale. Signed-off-by: Maarten Lankhorst [mlankhorst: Fix wording in documentation. (Ville)] Reviewed-by: Ville Syrjälä Link: https://patchwork.freedesktop.org/patch/msgid/20180503112217.37292-2-maarten.lankhorst@linux.intel.com

drm/rect: Fix drm_rect_rotation_inv() docs

2018-05-02T20:02:22+00:00

An overeager sed has corrupted the drm_rect_rotation_inv() documentation. Fix it up. Looks like it wasn't entirely correct before the sed fail either. We were missing _rect_ from the function names, which also explains why the sed hit these by accident. Signed-off-by: Ville Syrjälä Link: https://patchwork.freedesktop.org/patch/msgid/20180426141631.15798-1-ville.syrjala@linux.intel.com Reviewed-by: Daniel Vetter