kernel/linux.git/drivers/gpu/drm/amd/display/include/fixed31_32.h, branch v6.12.80

drm/amd/display: remove dc dependencies from SPL library

2024-07-23T21:07:12+00:00

[Why] Make SPL library dc-independent so it can be reused by other components [How] Create separate set of fixed31_32 calls in SPL Make all inputs and outputs to SPL use primitive types For ratios and inits, return as uint32 from SPL. So add conversion from uint32 back to fixed point in SPL-to-dc translate function Reviewed-by: Relja Vojvodic Signed-off-by: Jerry Zuo Signed-off-by: Samson Tam Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher

drm/amd/display: fix compilation error due to shifting negative value

2023-06-09T16:38:19+00:00

Currently compiling linux-next with allmodconfig triggers the following error: ./drivers/gpu/drm/amd/amdgpu/../display/include/fixed31_32.h: In function ‘dc_fixpt_truncate’: ./drivers/gpu/drm/amd/amdgpu/../display/include/fixed31_32.h:528:22: error: left shift of negative value [-Werror=shift-negative-value] 528 | arg.value &= (~0LL) << (FIXED31_32_BITS_PER_FRACTIONAL_PART - frac_bits); | ^~ Use `unsigned long long` instead. Signed-off-by: GONG, Ruiqi Signed-off-by: Hamza Mahfooz Signed-off-by: Alex Deucher

drm/amd/display: Remove compiler warning

2022-06-21T22:17:22+00:00

Tested-by: Daniel Wheeler Reviewed-by: Aric Cyr Acked-by: Rodrigo Siqueira Signed-off-by: Cruise Hung Signed-off-by: Alex Deucher

drm/amd/display/dc/basics/fixpt31_32: Move variables to where they're used

2020-11-10T19:27:10+00:00

Also rid some unused ones. This patch solves 2000 warnings! Fixes the following W=1 kernel build warning(s): In file included from drivers/gpu/drm/amd/amdgpu/../display/dc/dc_types.h:33, from drivers/gpu/drm/amd/amdgpu/../display/dc/dm_services_types.h:30, from drivers/gpu/drm/amd/amdgpu/../display/dc/dm_services.h:35, from drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm_helpers.c:35: At top level: drivers/gpu/drm/amd/amdgpu/../display/include/fixed31_32.h:76:32: warning: ‘dc_fixpt_ln2_div_2’ defined but not used [-Wunused-const-variable=] 76 | static const struct fixed31_32 dc_fixpt_ln2_div_2 = { 1488522236LL }; | ^~~~~~~~~~~~~~~~~~ drivers/gpu/drm/amd/amdgpu/../display/include/fixed31_32.h:75:32: warning: ‘dc_fixpt_ln2’ defined but not used [-Wunused-const-variable=] 75 | static const struct fixed31_32 dc_fixpt_ln2 = { 2977044471LL }; | ^~~~~~~~~~~~ drivers/gpu/drm/amd/amdgpu/../display/include/fixed31_32.h:74:32: warning: ‘dc_fixpt_e’ defined but not used [-Wunused-const-variable=] 74 | static const struct fixed31_32 dc_fixpt_e = { 11674931555LL }; | ^~~~~~~~~~ drivers/gpu/drm/amd/amdgpu/../display/include/fixed31_32.h:73:32: warning: ‘dc_fixpt_two_pi’ defined but not used [-Wunused-const-variable=] 73 | static const struct fixed31_32 dc_fixpt_two_pi = { 26986075409LL }; | ^~~~~~~~~~~~~~~ drivers/gpu/drm/amd/amdgpu/../display/include/fixed31_32.h:72:32: warning: ‘dc_fixpt_pi’ defined but not used [-Wunused-const-variable=] 72 | static const struct fixed31_32 dc_fixpt_pi = { 13493037705LL }; | ^~~~~~~~~~~ Cc: Harry Wentland Cc: Leo Li Cc: Alex Deucher Cc: "Christian König" Cc: David Airlie Cc: Daniel Vetter Cc: amd-gfx@lists.freedesktop.org Cc: dri-devel@lists.freedesktop.org Signed-off-by: Lee Jones Signed-off-by: Alex Deucher

drm/amd/display: fix pow() crashing when given base 0

2020-08-18T22:01:21+00:00

[Why&How] pow(a,x) is implemented as exp(x*log(a)). log(0) will crash. So return 0^x = 0, unless x=0, convention seems to be 0^0 = 1. Cc: stable@vger.kernel.org Signed-off-by: Krunoslav Kovac Reviewed-by: Anthony Koo Acked-by: Rodrigo Siqueira Signed-off-by: Alex Deucher

drm/amd/display: Add function to create 4d19 fixed point

2019-03-19T20:04:02+00:00

[Why] Implemented for future use Signed-off-by: Tyler DiBattista Reviewed-by: Eric Bernstein Acked-by: Bhawanpreet Lakha Signed-off-by: Alex Deucher

drm/amd/display: Prefix TIMING_STANDARD entries with DC_

2018-06-15T17:20:27+00:00

Signed-off-by: Reza Amini Reviewed-by: Aric Cyr Acked-by: Harry Wentland Signed-off-by: Alex Deucher

drm/amd/display: fix dscl_manual_ratio_init

2018-05-29T18:28:29+00:00

This change will fix wb and display scaling when ratios of 4 or more are involved Signed-off-by: Dmytro Laktyushkin Reviewed-by: Tony Cheng Acked-by: Harry Wentland Signed-off-by: Alex Deucher

drm/amd/display: Remove use of division operator for long longs

2018-05-24T15:07:56+00:00

In fixed31_32.h, in dc_fixpt_shl,'/' was used for division of one long long int by another long long int. As there is no inbuilt long long int division function in c, gcc inserted its own. However, gcc does not link the library that contains this function. To avoid this, use bitwise operators instead of / Reviewed-by: Alex Deucher Signed-off-by: David Francis Reviewed-by: Dmytro Laktyushkin Signed-off-by: Alex Deucher

drm/amd/display: fix a 32 bit shift meant to be 64 warning

2018-05-18T21:08:24+00:00

Signed-off-by: Dmytro Laktyushkin Reviewed-by: Tony Cheng Acked-by: Harry Wentland Signed-off-by: Alex Deucher