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drm/vkms: fix 32bit compilation error by replacing macros

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Replace vkms_formats macro for fixed-point operations with functions
from drm/drm_fixed.h to do the same job and fix 32-bit compilation
errors.

v2:
- don't cast results to s32 (Igor)
- add missing drm_fixp2int conversion (Igor)

Fixes: a19c2ac9858 ("drm: vkms: Add support to the RGB565 format")
Tested-by: Sudip Mukherjee <sudipm.mukherjee@gmail.com> (v1)
Reviewed-by: Alex Deucher <alexander.deucher@amd.com> (v1)
Reported-by: Sudip Mukherjee <sudipm.mukherjee@gmail.com>
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Melissa Wen <mwen@igalia.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220910190303.682897-1-mwen@igalia.com
This commit is contained in:
Melissa Wen 2022-09-10 18:03:03 -01:00 committed by Dave Airlie
parent fb34d8a04e
commit 89b03aeaef
1 changed files with 19 additions and 34 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

53
drivers/gpu/drm/vkms/vkms_formats.c
View file

@ -1,27 +1,12 @@
// SPDX-License-Identifier: GPL-2.0+
#include <drm/drm_rect.h>
#include <linux/kernel.h>
#include <linux/minmax.h>
#include <drm/drm_rect.h>
#include <drm/drm_fixed.h>
#include "vkms_formats.h"
/* The following macros help doing fixed point arithmetic. */
/*
* With Fixed-Point scale 15 we have 17 and 15 bits of integer and fractional
* parts respectively.
* | 0000 0000 0000 0000 0.000 0000 0000 0000 |
* 31 0
*/
#define SHIFT 15
#define INT_TO_FIXED(a) ((a) << SHIFT)
#define FIXED_MUL(a, b) ((s32)(((s64)(a) * (b)) >> SHIFT))
#define FIXED_DIV(a, b) ((s32)(((s64)(a) << SHIFT) / (b)))
/* This macro converts a fixed point number to int, and round half up it */
#define FIXED_TO_INT_ROUND(a) (((a) + (1 << (SHIFT - 1))) >> SHIFT)
#define INT_TO_FIXED_DIV(a, b) (FIXED_DIV(INT_TO_FIXED(a), INT_TO_FIXED(b)))
#define INT_TO_FIXED_DIV(a, b) (FIXED_DIV(INT_TO_FIXED(a), INT_TO_FIXED(b)))
static size_t pixel_offset(const struct vkms_frame_info *frame_info, int x, int y)
{
return frame_info->offset + (y * frame_info->pitch)
@ -137,19 +122,19 @@ static void RGB565_to_argb_u16(struct line_buffer *stage_buffer,
int x_limit = min_t(size_t, drm_rect_width(&frame_info->dst),
stage_buffer->n_pixels);
s32 fp_rb_ratio = INT_TO_FIXED_DIV(65535, 31);
s32 fp_g_ratio = INT_TO_FIXED_DIV(65535, 63);
s64 fp_rb_ratio = drm_fixp_div(drm_int2fixp(65535), drm_int2fixp(31));
s64 fp_g_ratio = drm_fixp_div(drm_int2fixp(65535), drm_int2fixp(63));
for (size_t x = 0; x < x_limit; x++, src_pixels++) {
u16 rgb_565 = le16_to_cpu(*src_pixels);
s32 fp_r = INT_TO_FIXED((rgb_565 >> 11) & 0x1f);
s32 fp_g = INT_TO_FIXED((rgb_565 >> 5) & 0x3f);
s32 fp_b = INT_TO_FIXED(rgb_565 & 0x1f);
s64 fp_r = drm_int2fixp((rgb_565 >> 11) & 0x1f);
s64 fp_g = drm_int2fixp((rgb_565 >> 5) & 0x3f);
s64 fp_b = drm_int2fixp(rgb_565 & 0x1f);
out_pixels[x].a = (u16)0xffff;
out_pixels[x].r = FIXED_TO_INT_ROUND(FIXED_MUL(fp_r, fp_rb_ratio));
out_pixels[x].g = FIXED_TO_INT_ROUND(FIXED_MUL(fp_g, fp_g_ratio));
out_pixels[x].b = FIXED_TO_INT_ROUND(FIXED_MUL(fp_b, fp_rb_ratio));
out_pixels[x].r = drm_fixp2int(drm_fixp_mul(fp_r, fp_rb_ratio));
out_pixels[x].g = drm_fixp2int(drm_fixp_mul(fp_g, fp_g_ratio));
out_pixels[x].b = drm_fixp2int(drm_fixp_mul(fp_b, fp_rb_ratio));
}
}
@ -248,17 +233,17 @@ static void argb_u16_to_RGB565(struct vkms_frame_info *frame_info,
int x_limit = min_t(size_t, drm_rect_width(&frame_info->dst),
src_buffer->n_pixels);
s32 fp_rb_ratio = INT_TO_FIXED_DIV(65535, 31);
s32 fp_g_ratio = INT_TO_FIXED_DIV(65535, 63);
s64 fp_rb_ratio = drm_fixp_div(drm_int2fixp(65535), drm_int2fixp(31));
s64 fp_g_ratio = drm_fixp_div(drm_int2fixp(65535), drm_int2fixp(63));
for (size_t x = 0; x < x_limit; x++, dst_pixels++) {
s32 fp_r = INT_TO_FIXED(in_pixels[x].r);
s32 fp_g = INT_TO_FIXED(in_pixels[x].g);
s32 fp_b = INT_TO_FIXED(in_pixels[x].b);
s64 fp_r = drm_int2fixp(in_pixels[x].r);
s64 fp_g = drm_int2fixp(in_pixels[x].g);
s64 fp_b = drm_int2fixp(in_pixels[x].b);
u16 r = FIXED_TO_INT_ROUND(FIXED_DIV(fp_r, fp_rb_ratio));
u16 g = FIXED_TO_INT_ROUND(FIXED_DIV(fp_g, fp_g_ratio));
u16 b = FIXED_TO_INT_ROUND(FIXED_DIV(fp_b, fp_rb_ratio));
u16 r = drm_fixp2int(drm_fixp_div(fp_r, fp_rb_ratio));
u16 g = drm_fixp2int(drm_fixp_div(fp_g, fp_g_ratio));
u16 b = drm_fixp2int(drm_fixp_div(fp_b, fp_rb_ratio));
*dst_pixels = cpu_to_le16(r << 11 | g << 5 | b);
}